$20

Category: Chemicals/Chemical Intermediates/Intermediate Compounds

Company: Hengshui Changjiang Prestressing Co., Ltd.

Product Description: Installation of Rotating Spherical Hinge / Processing and Production of 250MN Rotating Spherical Hinge / Price of 150000KN Spherical HingeThe rotating bridge spherical hinge is one of the most critical components in a bridge. It bears the overall load of the bridge and allows the bridge to rotate freely in both horizontal and vertical directions. The functions of the rotating bridge spherical hinge are mainly reflected in the following aspects:The rotating bridge spherical hinge can effectively reduce the stress on the bridge, dispersing the deformation and stress generated under load. The bridge deck and piers connected by the rotating spherical hinge can rotate and tilt freely within a certain range, thereby reducing the stress on the bridge structure and extending the bridge's service life.The rotating bridge spherical hinge also enhances the seismic performance of the bridge. During an earthquake, the bridge is subjected to forces from seismic waves. Without the rotating spherical hinge, the bridge structure may become overly rigid and prone to collapse. With the rotating spherical hinge, the bridge can undergo a certain degree of displacement and rotation under seismic forces, absorbing the energy of the seismic waves and improving the bridge's earthquake resistance.The rotating bridge spherical hinge can also adjust the degrees of freedom of the bridge, enabling it to adapt to complex and changing environmental conditions. During the construction process, factors such as temperature and wind can cause deformation in the bridge structure. Without a properly designed rotating spherical hinge for connection, this could lead to damage. By appropriately installing rotating spherical hinges, the bridge can deform freely within a certain range, enhancing the stability and safety of the bridge structure. more>

$4200

Category: Metallurgy & Minerals/Common Steel/Other Steel Products

Company:

Product Description: Common Thicknesses of Q420D Coil and PlateThe following is a comprehensive overview of the common thickness specifications for Q420D coil and plate, compiled based on current market availability and production standards: more>

$4200

Category: Metallurgy & Minerals/Common Steel/Other Steel Products

Company:

Product Description: S355J2 is a European standard low-alloy high-strength structural steel with excellent low-temperature impact properties. "S" stands for structural steel, "355" indicates its minimum yield strength of 355 MPa, and "J2" signifies that the material has good impact toughness at low temperatures of -20°C.S355J2 Low-Temperature Impact PropertiesStandard: S355J2 complies with the European standard EN 10025-2:2004.Chemical Composition: Carbon (C) content not exceeding 0.22%, silicon (Si) content not exceeding 0.55%, manganese (Mn) content not exceeding 1.60%, phosphorus (P) content not exceeding 0.025%, sulfur (S) content not exceeding 0.025%.Yield Strength: Depending on plate thickness, the yield strength is ≥355 MPa for thicknesses below 16mm, ≥345 MPa for 16-40mm, ≥335 MPa for 40-63mm, and so on, decreasing as plate thickness increases.Tensile Strength: Typically between 450-680 MPa.Impact Absorbed Energy: At low temperatures of -20°C, the impact absorbed energy is ≥27J.Comparison with National Standard Low-Temperature Impact PropertiesIn Chinese national standards, the equivalent steels to S355J2 are Q345D or Q345E, with specific comparisons as follows:Q345D: Yield strength of 345 MPa, tensile strength of 470-630 MPa, elongation not less than 18%, and impact absorbed energy ≥27J at low temperatures of -20°C.Q345E: Yield strength of 345 MPa, tensile strength of 470-630 MPa, elongation not less than 17%, and impact absorbed energy ≥27J at low temperatures of -40°C.Comparative AnalysisCompared to Q345D, S355J2 has a slightly higher yield strength, while Q345D's impact test temperature is -20°C, and Q345E's impact test temperature is even lower at -40°C. This indicates that Q345E maintains good impact toughness at even lower temperatures.ApplicationsS355J2 is widely used in building structures, bridges, ships, vehicle structural components, and the manufacturing of various tools, cutting tools, molds, and measuring instruments. Q345D and Q345E are also widely used in similar fields, especially within China.SummaryS355J2, along with Q345D and Q345E from Chinese national standards, are all high-strength structural steels with excellent low-temperature impact properties. S355J2 has a slightly higher yield strength, while Q345E undergoes impact testing at even lower temperatures. These steels are selected based on specific engineering requirements and environmental conditions to ensure structural safety and reliability.S355J232mm            2200114506.434S355J232mm            2200114506.408S355J225mm            2200117005.06S355J225mm            2200115004.976S355J225mm            2200116005.016S355J225mm            2200117005.066S355J232mm            2200112006.32S355J232mm            2200111506.276S355J232mm            2200111006.244 more>

$100

Category: Others

Company: Hebei Wuxing Power Equipment Co., Ltd.

Product Description: Hunan Emergency Multi-functional UAV Application Scope of UAVHunan Emergency Multi-functional UAV Application Scope of UAV Hunan Emergency Multi-functional UAV Application Scope of UAVStrength Decides Everything, Quality Surpasses All OthersHebei Wuxing · "Red Eagle" unmanned helicopter can be equipped with emergency rescue material thrower, flood fighting and rescue lights, emergency loudspeaker and other flood fighting and rescue modules.One-step arrival, quickly reach the rescue site to improve the efficiency of emergency rescue and disaster reliefHebei Wuxing · "Red Eagle" fuel-powered long-endurance large-load unmanned helicopter is equipped with a fully self-developed horizontally opposed water-cooled twin-cylinder piston engine with high power. It is foldable, small in size, low in fuel consumption, long in flight time, and has the characteristics of large load, long endurance, multi-purpose, safety and reliability. It is widely used in China's emergency rescue, flood control and disaster relief, fire protection, forest fire prevention and grassland fire fighting and other fields.Long EnduranceOne Tank of Fuel, Endless PotentialThe "Red Eagle" large-load long-endurance unmanned helicopter from Hebei Wuxing has a battery life of more than 10 hours, which has revolutionized the tethered application of UAVs. It has made its mark in high-rise fire fighting, emergency lighting, emergency communication and other fields.Strong Wind ResistanceStand Firm Amidst StormsThe "Red Eagle" unmanned helicopter from Hebei Wuxing has better wind resistance when flying at low altitude and low speed. Thanks to its excellent rotor structure, it can take off, land and operate in Level 6 wind, which expands the application scenarios of UAVs on water surfaces such as rivers, lakes and seas.Flexible and AgileStill as a Maiden, Moving like a RabbitThe rotor structure of the "Red Eagle" unmanned helicopter from Hebei Wuxing determines its flexible and agile characteristics. When hovering, it is like a nail in the air, motionless, and when cruising, it has a speed of 100 kilometers per hour. Combined with its ultra-long endurance and load capacity, the "Red Eagle" large-load long-endurance unmanned helicopter from Hebei Wuxing has reached a new height in emergency rescue applications.Easy to StoreCompact and Versatile, Easy to Stow and DeployMany application scenarios require UAVs to be quickly deployed, stored and transported. By reforming the tail rotor structure of traditional helicopters and canceling the transmission mechanism, the rapid tail folding function is realized. The folded storage volume is reduced by 50%, and the deployment and storage only take three minutes to quickly enter the working state, empowering various application scenarios.Unlimited CeilingSoar High, Gain a Broad PerspectiveThe "Red Eagle" large-load long-endurance unmanned helicopter from Hebei Wuxing now can operate and fly at an altitude of more than 5,000 meters. It is continuing to make efforts in high-altitude technology, striving to fly higher and contribute to artificial rainfall, plateau material transportation, border patrol and other fields. more>

$100

Category: Others

Company: Hebei Wuxing Power Equipment Co., Ltd.

Product Description: Scope of UAV Use, Parameter Encyclopedia, Custom Flood Prevention and Rescue UAVsScope of UAV Use, Parameter Encyclopedia, Custom Flood Prevention and Rescue UAVs Easy to StoreCompact and Versatile, Easy to Fold and UnfoldMany application scenarios require UAVs to be quickly deployed, stored and transported. By reforming the tail rotor structure of traditional helicopters and canceling the transmission mechanism, the rapid tail folding function has been realized. The folded storage volume is reduced by 50%, and the deployment and storage only take three minutes to complete, allowing it to enter the working state in the shortest time and empower various application scenarios.Unlimited CeilingSoar High and Gain a Broad PerspectiveHebei Wuxing "Red Eagle" high-payload long-endurance unmanned helicopter has now achieved operational flight at an altitude of over 5000 meters, and continues to make efforts in high-altitude technology, striving to fly even higher, and contributing to fields such as artificial rainfall, plateau material transportation, and border patrol.Highly Efficient PayloadCapable of Handling Tiny Loads and Powerful Enough to Lift Heavy WeightsAt present, the thrust-to-weight ratio of most single-rotor helicopters in the industry is no higher than 1.5. Through continuous exploration and optimization of the engine, the thrust-to-weight ratio of the single-rotor helicopter has been increased to over 2. A high thrust-to-weight ratio is not only a symbol of technology, but also brings economical fuel performance and better operating indicators, which has great advantages in application fields such as mission hang flight tests.Enhanced SafetyHeavy Fuel Aeroengine, Top PriorityThe engine is the core of the helicopter, which is an important technical layout. The gasoline and heavy oil dual-fuel aeroengine enables Hebei Wuxing "Red Eagle" high-payload long-endurance unmanned helicopter to be safer in forest fire prevention and shipboard operation.High ReliabilityWithstand Any Environment, Forged Through HardshipIt has the ability to fly in extremely harsh environments, take off and land in sand and dust, fly in mud, operate under overload, and be maintained quickly. Harsh environments have forged the reliable quality and随时救援能力 of Hebei Wuxing "Red Eagle" high-payload long-endurance unmanned helicopter, enabling it to carry out rescue missions at any time. more>

$100

Category: Others

Company: Hebei Wuxing Power Equipment Co., Ltd.

Product Description: Price of Customized Emergency Rescue UAV: Firefighting Unmanned Helicopter Price of Customized Emergency Rescue UAV: Firefighting Unmanned Helicopter Doubled SafetyHeavy-duty Aero Engine, Top Priority As a key technological layout, the dual-fuel aero engine supporting both gasoline and heavy oil makes the emergency large-load long-endurance unmanned helicopter safer in forest fire prevention and shipboard operation. High ReliabilityWithstand Any Environment, Forged Through Repeated Trials Capable of flying in extremely harsh environments, it can take off and land in sandstorms, fly in muddy conditions, operate under overload, and be maintained quickly. Harsh environments have forged the reliable quality and ready rescue capability of the emergency large-load long-endurance unmanned helicopter. Customized Matching·According to Needs Customized Equipment Mounting Equipment modules and rescue器材 can be mounted according to needs Satellite Communication Equipment,Window Breaker,Foam Gun,Warning Light,Ad-hoc Network Equipment,Detection Equipment,Four-light Pod,Integrated Searchlight and Megaphone,Fire-spraying Equipment,Weapon Mounting,Lifting Ink Bag,Throwing Equipment,Airborne Deicer,Illumination Equipment,Fire Extinguishing Bomb,Airborne Net Gun Emergency Forest Fire Prevention Reconnaissance and Firefighting Unmanned Helicopter The emergency unmanned helicopter series includes: rescue unmanned helicopters, high-rise urban firefighting unmanned helicopters, flood control and disaster relief unmanned helicopters, water rescue unmanned helicopters, forest and grassland fire fighting unmanned helicopters, communication unmanned helicopters, command unmanned helicopters, fire rescue unmanned helicopters, power emergency repair unmanned helicopters, aerial disaster investigation and survey unmanned helicopters, etc. It can be equipped with visible light, far-infrared, laser ranging three-light pod, dual-spectrum pan-tilt, intercom relay module, fire extinguishing bomb throwing system, fire extinguishing bomb aiming device, more>

$100

Category: Others

Company: Hebei Wuxing Power Equipment Co., Ltd.

Product Description: Scope of UAV Applications, Parameter Encyclopedia, Customized Flood Prevention and Rescue UAVsScope of UAV Applications, Parameter Encyclopedia, Customized Flood Prevention and Rescue UAVs Easy to StoreCompact and Versatile, Easy to Fold and UnfoldMany application scenarios require UAVs to be quickly deployed, stored and transported for operations. By reforming the tail rotor structure of traditional helicopters and canceling the transmission mechanism, the rapid tail folding function has been realized. The folded storage volume is reduced by 50%, and the deployment and storage can be completed in only three minutes, allowing it to enter the operational state in the fastest time and empower various application scenarios.Unlimited CeilingSoar High and Gain a Broad PerspectiveHebei Wuxing "Red Eagle" high-payload, long-endurance unmanned helicopter has now achieved operational flight at an altitude of over 5,000 meters, and continues to make efforts in high-altitude technology, striving to fly even higher, and contributing to fields such as artificial rainfall, plateau material transportation, and border patrol.Highly Efficient PayloadCapable of Handling Tiny Loads and Great Forces AlikeAt present, the thrust-to-weight ratio of most industry single-rotor helicopters is no higher than 1.5. Through continuous exploration and optimization of the engine, the thrust-to-weight ratio of single-rotor helicopters has been increased to over 2. A high thrust-to-weight ratio is not only a symbol of technology, but also brings economical fuel performance and better operational indicators, which has great advantages in application fields such as mission pendulum flight tests.Doubled SafetyHeavy Fuel Aeroengine, the Core PriorityThe engine is the core of a helicopter, which is an important technical layout. The dual-fuel aeroengine system supporting both gasoline and heavy fuel makes Hebei Wuxing "Red Eagle" high-payload, long-endurance unmanned helicopter safer in forest fire prevention and shipboard operation fields.High ReliabilityUnfazed by Any Environment, Forged Through HardshipIt is capable of flying in extremely harsh environments, taking off and landing in sand and dust, flying in mud, operating under overload, and allowing quick maintenance. Harsh environments have forged the reliable quality and随时救援的能力 of Hebei Wuxing "Red Eagle" high-payload, long-endurance unmanned helicopter, enabling it to carry out rescue missions at any time. more>

$100

Category: Others

Company: Hebei Wuxing Power Equipment Co., Ltd.

Product Description: Hunan Emergency Multi-functional UAV Application Scope of UAVsHunan Emergency Multi-functional UAV Application Scope of UAVs Hunan Emergency Multi-functional UAV Application Scope of UAVsStrength Decides Everything, Quality Surpasses All OthersHebei Wuxing · "Red Eagle" unmanned helicopter can be equipped with emergency rescue material throwers, flood fighting and rescue lights, emergency loudspeakers and other flood fighting and rescue modules.Arrive at the rescue scene in one go, improve the efficiency of emergency rescue and disaster reliefHebei Wuxing · "Red Eagle" fuel-powered long-endurance large-load unmanned helicopter is equipped with a fully self-developed horizontally opposed water-cooled twin-cylinder piston engine with high power. It is foldable, small in size, low in fuel consumption, long in flight time, and has the characteristics of large load, long endurance, multi-purpose, safety and reliability. It is widely used in China's emergency rescue, flood control and disaster relief, fire protection, forest fire prevention and grassland fire fighting and other fields.Long EnduranceOne Tank of Fuel, Endures Through ChangesThe "Red Eagle" large-load long-endurance unmanned helicopter from Hebei Wuxing has a battery life of more than 10 hours, which has revolutionized the mooring application of UAVs. It has made its mark in high-rise fire fighting, emergency lighting, emergency communication and other fields.Strong Wind ResistanceStand Firm Amidst Turbulent WindsThe "Red Eagle" unmanned helicopter from Hebei Wuxing has better wind resistance when flying at low altitude and low speed. Thanks to its excellent rotor structure, it can take off, land and operate in Level 6 winds, which expands the application scenarios of UAVs on water surfaces such as rivers, lakes and seas.Flexible and ManeuverableStill as a Maiden, Swift as a RabbitThe rotor structure of the "Red Eagle" unmanned helicopter from Hebei Wuxing determines its flexible and maneuverable characteristics. When hovering, it is like a nail in the air, motionless, and when cruising, it has a speed of 100 kilometers per hour. Combined with its ultra-long endurance and load capacity, the "Red Eagle" large-load long-endurance unmanned helicopter from Hebei Wuxing has reached a new height in emergency rescue applications.Easy to StoreCompact and Versatile, Easy to Stow and DeployMany application scenarios require UAVs to quickly deploy and stow operations, and be convenient for transportation. By reforming the tail rotor structure of traditional helicopters and canceling the transmission mechanism, the rapid tail folding function is realized. The folded storage volume is reduced by 50%, and the operation deployment and storage can be completed in only three minutes, entering the working state in the fastest time, empowering various application scenarios.Unlimited CeilingSoar High, Gain a Broad PerspectiveThe "Red Eagle" large-load long-endurance unmanned helicopter from Hebei Wuxing has now achieved operational flight at an altitude of more than 5,000 meters, and continues to make efforts in high-altitude technology, striving to fly higher into the blue sky, and contributing to artificial rainfall, plateau material transportation, border patrol and other fields. more>

Negotiable

Category: Chemicals/Intermediates/Pharmaceutical Intermediates

Company: Zouping Mingyuan Imp Exp Trade Co Ltd.

Product Description: more>

$面谈

Category: Chemicals/Intermediates/Fragrance & Flavor Intermediates

Company: 陕西圣瑞医药科技有限公司

Product Description: Analysis of the Mechanism of Action of Medical-Grade and Pharmaceutical-Grade Potassium CitrateAs a commonly used clinical drug, pharmaceutical-grade potassium citrate demonstrates significant efficacy in the treatment and prevention of various diseases. Its mechanism of action involves multiple physiological processes, which are detailed below.1. Supplementing Potassium Ions and Correcting HypokalemiaPotassium ions are important cations within human cells, playing a key role in maintaining normal cellular metabolism, neuromuscular excitability, and overall physiological function. Hypokalemia occurs when the body loses excessive potassium due to various reasons (such as inadequate intake, vomiting, diarrhea, or long-term use of potassium-wasting diuretics) or when potassium intake is insufficient. Hypokalemia can lead to a range of symptoms, including muscle weakness and arrhythmias.After ingestion, pharmaceutical-grade potassium citrate dissociates into potassium ions in the gastrointestinal tract. These potassium ions enter the bloodstream through active transport and passive diffusion across the intestinal mucosa. They are then transported into cells, replenishing intracellular potassium deficits and restoring the balance of potassium concentrations inside and outside cells. This process corrects hypokalemia and restores normal neuromuscular excitability and cardiac rhythm.2. Regulating Acid-Base Balance and Improving Renal Tubular AcidosisRenal tubular acidosis results from impaired renal tubule function, reducing the kidneys' ability to regulate acid-base balance. This leads to the accumulation of acidic substances or loss of alkaline substances in the body, causing acidosis. In patients with type I distal renal tubular acidosis accompanied by hypokalemia, pharmaceutical-grade potassium citrate plays a crucial therapeutic role.After metabolism in the body, the citrate ions from potassium citrate participate in the tricarboxylic acid cycle, ultimately oxidizing into carbon dioxide and water while generating bicarbonate ions (HCO₃⁻). Bicarbonate is an important alkaline substance that neutralizes excess acids in the body, increases blood pH, and corrects acidosis. Simultaneously, potassium supplementation helps improve the function of renal tubular cells, further promoting the restoration of acid-base balance.3. Altering Urine Composition and Preventing Urinary System StonesThe formation of urinary stones is closely related to the concentration and solubility of various components in urine. Pharmaceutical-grade potassium citrate prevents urinary stones through the following mechanisms:Inhibiting Calcium Oxalate Stone Formation: Calcium oxalate is one of the primary components of kidney stones. The citrate ions released from potassium citrate bind with calcium ions to form soluble calcium citrate complexes. This reduces the concentration of free calcium ions in urine, decreasing the chance of calcium ions combining with oxalate ions to form calcium oxalate crystals, thereby inhibiting stone formation. Additionally, calcium citrate complexes have high solubility and are less likely to precipitate, further preventing stone growth.Dissolving Uric Acid Stones: Uric acid has low solubility in acidic urine and tends to crystallize into stones. After ingestion, pharmaceutical-grade potassium citrate increases urine pH, making it alkaline. In an alkaline environment, the solubility of uric acid significantly increases, leading to the gradual dissolution of existing uric acid stones, thus preventing and treating uric acid stones.4. Influencing Electrophysiology and Alleviating ArrhythmiasIn cases of arrhythmias caused by digitalis toxicity, pharmaceutical-grade potassium citrate can also provide therapeutic benefits. Potassium ions significantly impact the electrophysiological properties of myocardial cells. During hypokalemia, myocardial cell excitability increases, and automaticity is enhanced, making arrhythmias more likely. Supplementing with pharmaceutical-grade potassium citrate allows potassium ions to enter myocardial cells, restoring the resting membrane potential, reducing excitability and automaticity, and improving conduction function. This corrects arrhythmias caused by hypokalemia or digitalis toxicity, restoring normal rhythm.Analysis of the Mechanism of Action of Medical-Grade and Pharmaceutical-Grade Potassium CitratePotassium citrate is an important pharmaceutical excipient widely used in the pharmaceutical industry. As an inorganic salt, it exhibits good solubility and biocompatibility, commonly serving as an acid-base regulator, chelating agent, and potassium supplement. According to the "Chinese Pharmacopoeia 2020 Edition (CP Edition)," the quality standards for pharmaceutical-grade potassium citrate cover multiple aspects to ensure its safety, efficacy, and stability in medications.1. Appearance and PropertiesPharmaceutical-grade potassium citrate should appear as a white crystalline powder or granules, odorless or with a slight acidic odor. Its appearance must be clean and free of visible impurities. Solubility requirements include:- Solubility: Easily soluble in water, almost insoluble in ethanol.- Solution Clarity: The aqueous solution must be clear and transparent without significant precipitation.Main products include:Common excipients for topical preparations: Glycerin/Propylene Glycol, Vaseline/Lanolin, Laurocapram, Stearic Acid, Triethanolamine, Poloxamer 188/407, Polysorbate 80, Polyethylene Glycol Series, Solid Paraffin, Liquid Paraffin (Light/Heavy), Mixed Fatty Acid Glycerides, and other varieties.Excipients for oral preparations: Honey/Sucrose, Lactose/Aspartame, Hydroxypropyl Beta-Cyclodextrin, Hypromellose, Methylcellulose, Ethylcellulose, Microcrystalline Cellulose, Povidone K30, Magnesium Stearate, Maltose/Saccharin Sodium/Sucralose/Tranexamic Acid/Stevioside, Gelatin, Color Lakes, Flavors, and other varieties.Excipients for injections: (Endotoxin & Microbial Limit Requirements)Cholesterol, Trehalose (Anhydrous/Dihydrate), Lecithin/Soybean Phospholipid, Polysorbate (for injection), Citric Acid/Sodium Citrate, Sodium Phosphate Monobasic/Potassium Phosphate Dibasic, Lactose (for injection), Disodium Edetate (for injection)Raw materials for topical disinfection and antibacterial use:Chlorhexidine Acetate, Chlorhexidine Gluconate Solution, Benzalkonium Bromide/Benzalkonium Chloride, Menthol/Mentha Arvensis Oil, Salicylic Acid/Sodium Benzoate, Vitamin E Oil, Dimethicone, Span 80/85, Methylparaben/Ethylparaben/Propylparaben/Sodium Methylparaben/Sodium Propylparaben, Tromethamine, Chlorobutanol, Aluminum Glycinate, etc.Sterile Water for Injection, Silver Sulfadiazine, Vitamin A, Camphor, Borneol, Sodium Bicarbonate, Berberine, Pentoxyverine Citrate, Metformin, Artificial Cow Bezoar, Paracetamol, Simple Syrup, Dexamethasone, Glycerin, Potassium Citrate, Chitosan, Calamine, Roxithromycin, ProcaineAlso available for consultation: Food-grade products, extracts, reagents, intermediates, cosmetic raw materials, and export products. more>

Negotiable

Category: Velvet Scarf

Company: Shandong Angel Home Decoration Products Co., Ltd.

Product Description: more>

Negotiable

Category: Chemicals/Quaternary Ammonium Salts/Alkyl Quaternary Ammonium Salts

Company:

Product Description: more>

Negotiable

Category: Others

Company:

Product Description: Project Description:Study gas flow and its interaction with models to understand the aerodynamic characteristics of actual aircraft or other objects.Test Items:Wind tunnel testing, wind resistance testing, temperature and humidity testing, rain testing, snowfall testingTesting Service Introduction:1) Dimensions: 71.5m×27.05m×11.2m;2) Wind speed: 1~80m/s;3) Temperature range: -40℃~70℃;4) Humidity range: 10%~90%RH;5) Rainfall intensity: 0~250mm/h;6) Snowfall intensity: 0~150mm/h;7) Solar radiation: 500~1200W/m² more>

$4500

Category: Chemicals/Chemical Intermediates/Intermediate Compounds

Company:

Product Description: From January 26th to January 30th, the trading situation in the Shanghai steel market remained generally weak, with terminal demand continuing to shrink. Traders generally faced difficulties in shipments, sales decreased significantly, and prices continued to decline. Most merchants focused on low-price promotions to recover funds. The price trends of major steel products during the week were as follows: the market prices of rebar and wire rod continued to fall, the market prices of medium and heavy plates declined overall, the market prices of cold-rolled and hot-rolled coils saw an accelerated decline, and the market prices of section steel experienced a downward consolidation.According to information gathered by operators during research, the Shanghai construction steel market continued to linger in a sluggish and depressed state, with poor market sales, a sharp decline in volume, and a gradual drop in prices. Operators are not optimistic about the market conditions in February and remain highly concerned about the uncertain factors affecting the future market. The current uncertainties are mainly reflected in the following aspects: First, both terminal and intermediate demand have declined. As the Spring Festival approaches, construction projects have largely halted, and many sites have stopped purchasing steel. Traders, facing year-end capital shortages, are generally not stockpiling. Therefore, terminal and intermediate demand will continue to shrink in the later period, making it difficult to support a rebound in steel prices. Second, the "price war" has reignited. Currently, steel traders are generally bearish on the future market, with most focusing on low-price promotions and offering discounts on transaction prices to "exchange price for volume." The intense price war has led to a continuous gradual decline in market prices. Third, steel mills have frequently lowered their ex-factory prices, and competition among manufacturers has intensified. Recently, the pressure on winter orders for steel mills has further increased. To attract steel traders to place orders, mills have successively reduced ex-factory prices and introduced preferential policies. Fourth, supply is excessive, and inventories are growing. According to statistics from the China Iron and Steel Association, the daily crude steel output of key enterprises in early January was 1.7849 million tons, a increase of 3.63% compared to the previous ten-day period. By the end of early January, the steel inventory of key steel enterprises stood at 13.637 million tons, an increase of 2.98% from the previous ten-day period. Fifth, the phenomenon of stronger demand and higher prices in the south compared to the north persists. In mid-January, the price of Grade III rebar in Beijing fell to 2,230 yuan/ton, with high-quality coil rebar quoted at 2,360 yuan/ton. During the same period, the price of Grade III rebar in the Shanghai market was 2,470 yuan/ton, with high-quality coil rebar quoted at 2,670 yuan/ton, a difference of 240 to 310 yuan/ton between the north and south. As a result, the flow of "northern steel to the south" remains strong, increasing sales pressure in the southern market. Sixth, steel mill maintenance has increased. According to research data, as of January 21st, a total of 12 blast furnaces from 12 large and medium-sized steel mills in China were under maintenance, expected to affect pig iron production by approximately 896,000 tons. Additionally, 10 construction steel mills have halted production for maintenance of wire rod and bar rolling mills, expected to affect construction steel production by approximately 781,000 tons. In summary, it is expected that the market prices for construction steel in Shanghai will mainly consolidate in the later period, with a significant rebound unlikely to occur. more>

$4200

Category: Metallurgy & Minerals/Common Steel/Steel Plates

Company:

Product Description: Q390D is a high-strength low-alloy structural steel, whose chemical composition primarily includes basic elements such as carbon (C), manganese (Mn), silicon (Si), phosphorus (P), sulfur (S), and may also contain trace alloying elements like vanadium (V), niobium (Nb), titanium (Ti), which help enhance the strength and toughness of the steel.Carbon is the main element affecting the strength of steel. The carbon content in Q390D is typically controlled at a low level to ensure good plasticity and weldability. Manganese, as an alloying element, can increase the strength and hardness of the steel while improving its processing performance. Silicon helps enhance the elastic limit of the steel, while phosphorus and sulfur are generally regarded as impurities and need to be kept at low levels to avoid degrading the material's performance.Trace alloying elements such as vanadium, niobium, and titanium may exist in Q390D in the form of fine carbides or nitrides, which can refine the grain structure and improve the steel's strength and impact resistance. The addition of these alloying elements enables Q390D to maintain high yield strength while also offering good low-temperature impact toughness and weldability, making it suitable for more demanding engineering applications.AngangCoil5.75mmQ390D0.01500.0128.480AngangCoil5.75mmQ390D0.01500.0128.640AngangCoil5.75mmQ390D0.01500.0128.850AngangCoil5.75mmQ390D0.01500.0128.470AngangCoil5.75mmQ390D0.01500.0128.120AngangCoil5.75mmQ390D0.01500.0128.410 more>

$4500

Category: Metallurgy & Minerals/Common Steel/Other Steel Products

Company:

Product Description: Q420D steel plate is a high-strength low-alloy structural steel with excellent mechanical properties and low-temperature impact toughness. When performing processes such as bending and cutting, certain process precautions must be taken to ensure processing quality and safety.I. Bending Process PrecautionsPreparation Before BendingBefore bending, it is necessary to confirm whether the material, thickness, dimensions, etc., of the Q420D steel plate meet the requirements, and to check whether the surface of the steel plate has defects such as scratches, rust, or holes. At the same time, to ensure the accuracy of bending, positioning and marking should be carried out according to the process requirements.Selection of Bending EquipmentDepending on the material and thickness of the Q420D steel plate, appropriate bending equipment must be selected. Generally, for thicker steel plates, large presses or bending machines are required, while for thinner steel plates, small bending machines or hydraulic bending machines can be used.Control of Bending RadiusDuring bending, the size of the bending radius must be controlled. Generally, for thicker steel plates, the bending radius needs to be increased accordingly, while for thinner steel plates, the bending radius can be reduced accordingly. At the same time, care must be taken to avoid issues such as dead zones or creases during the bending process.Adjustment of Bending AngleDuring bending, the size of the bending angle must be adjusted. The bending angle should be determined based on design requirements and actual conditions, and the angle should be continuously adjusted during the bending process to ensure accuracy.II. Cutting Process PrecautionsPreparation Before CuttingBefore cutting, it is necessary to confirm whether the material, thickness, dimensions, etc., of the Q420D steel plate meet the requirements, and to check whether the surface of the steel plate has defects such as scratches, rust, or holes. At the same time, cutting equipment, tools, and protective gear should be prepared.Selection of Cutting EquipmentDepending on the material and thickness of the Q420D steel plate, appropriate cutting equipment must be selected. Generally, for thicker steel plates, methods such as flame cutting, plasma cutting, or laser cutting can be used, while for thinner steel plates, methods such as shearing machines or laser cutting can be employed.Control of Cutting QualityDuring cutting, attention must be paid to controlling the quality and precision of the cut. The position and dimensions of the cutting line should be determined based on design requirements and actual conditions, and cutting parameters should be continuously adjusted during the process to ensure accuracy. At the same time, care must be taken to avoid issues such as burrs or slag during cutting.Post-Cutting TreatmentAfter cutting, the cut edges must be treated. Generally, processes such as grinding and trimming are required to remove impurities like burrs and slag, ensuring the smoothness and precision of the cut edges.In summary, when performing processes such as bending and cutting on Q420D steel plates, process precautions must be taken to ensure processing quality and safety. Appropriate equipment and technical parameters should be selected based on actual conditions, and the process flow should be continuously adjusted and optimized during processing to guarantee the quality and performance of the final product. more>

$4500

Category: Metallurgy & Minerals/Common Steel/Other Steel Products

Company:

Product Description: S355J2 steel plate is a low-alloy high-strength structural steel with excellent mechanical properties and machinability, widely used in construction, bridges, ships, vehicles, and other fields. S355J2 steel plates produced by different steel mills may have certain differences and price variations.First, there may be some differences in the chemical composition of S355J2 steel plates produced by different steel mills. Although the production processes and raw materials of different steel mills may vary, the chemical composition of S355J2 steel plates should comply with the corresponding international or national standards. Generally, the chemical composition of S355J2 steel plates from major steel mills meets the relevant standards, but there may be slight differences between products from different manufacturers.Second, there may be some differences in the mechanical properties of S355J2 steel plates produced by different steel mills. Variations in production processes and heat treatment methods among steel mills can lead to differences in mechanical properties such as strength, hardness, plasticity, and toughness. Generally, the mechanical properties of S355J2 steel plates from major steel mills comply with the relevant standards, but there may be slight differences between products from different manufacturers.Additionally, the price of S355J2 steel plates produced by different steel mills may also vary. Factors such as production costs, brand recognition, and sales strategies can influence the price of their products. Generally, S355J2 steel plates from well-known brands may be relatively more expensive, but they may also offer better product quality and after-sales service.In summary, S355J2 steel plates produced by different steel mills may have certain differences and price variations. When selecting S355J2 steel plates, it is necessary to choose based on specific usage requirements and design needs, taking into account factors such as product quality, mechanical properties, and price from different manufacturers. It is also recommended to choose S355J2 steel plates from well-known brands to ensure product quality and after-sales service.S355J230mm            22001070015.59S355J230mm            22001065015.602S355J225mm            21801155015.016S355J230mm            22001000015.298S355J230mm            2200650013.47S355J230mm            22001045015.532S355J230mm            2200640013.41S355J230mm            22001060015.624 more>

$4500

Category: Metallurgy & Minerals/Common Steel/Other Steel Products

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Product Description: The reasons for the failure of low-temperature impact toughness in Q390E steel may include the following aspects:Unreasonable chemical composition. For example, excessively high carbon content or excessively low manganese content may lead to low-temperature impact failure.Inappropriate heat treatment process. During heat treatment, temperature and cooling rate directly affect the low-temperature toughness of the steel plate. Excessively high or low temperatures, as well as excessively fast or slow cooling rates, may reduce low-temperature impact performance.Unreasonable plate forming process. During the forming process, the steel plate undergoes significant stretching and compression, which may cause cracks and fractures at low temperatures, thereby reducing low-temperature impact performance.Unreasonable content of alloying elements. The content of elements such as chromium and nickel is related to low-temperature strength. Chromium can improve the corrosion resistance of steel but has little effect on low-temperature toughness, while nickel can improve the toughness of steel but has little effect on corrosion resistance. Therefore, appropriate additions of elements such as nickel and chromium can simultaneously enhance the toughness and corrosion resistance of the steel plate, thereby improving its low-temperature impact performance.To address this issue, the following measures can be taken:Optimize the material formulation and reasonably control the chemical composition, such as carbon and manganese content.Optimize the heat treatment process by establishing appropriate heating and cooling systems to achieve good low-temperature toughness.Optimize the plate forming process to reduce potential cracks and fractures during forming.Reasonable combination of alloying elements, with appropriate additions of elements such as nickel and chromium to improve the toughness and corrosion resistance of the steel plate.In summary, the reasons for the failure of low-temperature impact toughness in Q390E steel are multifaceted and require comprehensive consideration of material formulation, heat treatment process, plate forming process, and alloying element content. By implementing corresponding measures, the low-temperature impact performance of the steel plate can be effectively improved. more>

$2311

Category: Others

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Product Description: Motor Test Platform: How to Choose the Right Test Platform to Improve Product QualityIn industrial production, motors, as key power conversion devices, have their stability and reliability directly related to the operational efficiency and safety of the entire system. To ensure that motor products meet the expected design standards and market demands, the selection of a motor test platform is particularly important. A suitable test platform can not only accurately evaluate various performance indicators of the motor but also play a crucial guiding role in the research, development, and production processes, thereby improving product quality. This article will delve into the basic composition, selection principles, key factors, and practical applications of motor test platforms, aiming to provide enterprises with a scientific and reasonable selection strategy.I. Basic Composition of a Motor Test PlatformA motor test platform typically consists of several major components, including the test system, control system, data acquisition and analysis system, and safety protection devices. The test system is responsible for applying various loads and conditions to simulate the actual working environment of the motor; the control system is used to regulate test parameters to ensure the stability and repeatability of the testing process; the data acquisition and analysis system collects test data and processes it through software to derive various performance indicators of the motor; and the safety protection devices are essential measures to ensure the safety of test personnel and equipment.II. Principles for Selecting a Motor Test Platform1. Meet Testing Requirements: First, the selected test platform must cover all the required test items for the motor, including but not limited to efficiency testing, temperature rise testing, vibration and noise testing, and overload capacity testing. Only comprehensive coverage can ensure a thorough evaluation of motor performance.2. High Precision and Stability: The accuracy and stability of test results are key indicators of the quality of a test platform. High-precision sensors and control systems ensure the authenticity of test data, while good stability guarantees the repeatability of test results, which is crucial for the continuous improvement of product quality.3. Ease of Operation and Maintenance: A user-friendly interface and intuitive operation process can reduce operational difficulty and improve work efficiency. At the same time, an easy-to-maintain design can minimize downtime and extend the service life of the equipment.4. Scalability and Compatibility: As technology advances and products are upgraded, testing requirements may change. Therefore, the selected test platform should have good scalability, allowing for easy upgrades to testing functions or the addition of new test items. Additionally, compatibility with existing test systems and production lines is also a factor to consider.In summary, selecting the right motor test platform is of great significance for improving product quality. During the selection process, enterprises should fully consider factors such as testing requirements, precision and stability, ease of operation and maintenance, scalability and compatibility, and cost-effectiveness. Through a scientific and reasonable selection strategy, enterprises can build an accurate and reliable motor testing system, laying a solid foundation for continuous product improvement and enhanced market competitiveness. At the same time, with the continuous advancement of technology and changing market demands, enterprises should also stay informed about new technologies and methods, upgrading the test platform in a timely manner to adapt to future testing needs.Weiyue Machinery, Ms. Xie, 15350773479 more>

Negotiable

Category: Chemicals/Chemical Intermediates/Intermediate Compounds

Company:

Product Description: Beijing Huibo Times Technology Co., Ltd. Shanghai Branch provides professional after-sales maintenance services for the Eurotherm Recorder 6180A series. Our company specializes in industrial automation measurement and control instruments, valves, and related supporting products. With over ten years of experience in the maintenance and after-sales service of automation instrument products, the company has a professional technical service team that offers comprehensive services such as system maintenance and upkeep for customers.Our professional technical service team and extensive industry experience enable us to provide timely, accurate, and reasonably priced services with efficiency and completeness. We will continue to serve both new and existing customers with "excellent cost-effectiveness," striving to achieve "timely delivery, attentive service, quality assurance, and customer satisfaction." We warmly welcome both new and existing users.Eurotherm Recorder 6180A Series MaintenanceModels:6180, 6180A, 6100A, 6000X10, 6100E, 4103M, 4103C, 4102M, 4102C, 392, 4001, 4101M, 4101C, 6180XIX, etc.Eurotherm Recorder MaintenanceFaults:No display upon power-up; failure to auto-reset; abnormal display; temperature imbalance; overheating; communication failure; no alarm for overheating; abnormal output, and other faults.Brands Our Company Can Repair:Sanko film thickness gauges, EISEN pin gauges/three-wire gauges, RIKEN level meters/eccentricity detectors, SHOWA vibration meters, TASCO thermohygrometers, TECLOCK hardness testers/dial indicators/thickness gauges/depth gauges, TOHNICHI torque tools, SATO pressure gauges/thermohygrometers/thermohygrographs 7210-00. Tokyo Precision tension meters (special price for DTA), DELVO electric screwdrivers, NSK grinders/cutters, PEAK magnifiers, VICTOR pneumatic shears/pliers, KORI counters, JPG thread gauges, CEDAR torque tools, SHINANO grinders, FUJITOOL inspection tools, YOKOGAWA tension meters, IMADA push-pull force gauges.Huibo Maintenance National Contact Information:Beijing Headquarters: Room 403A, Building 3, Saidi International Industrial Park, No. 6 Kechuang 14th Street, Beijing Economic-Technological Development Area (Yizhuang)Tel: 010-88459351/88459350Shanghai Branch: Room 401, No. 69 Xingda Road, Pujiang Town, Minhang District, ShanghaiTel: 021-54257837/54257867Shenzhen Branch: Room 313, No. 8 Shenshan Road (Longgang Section), Longdong Community, Baolong Street, Longgang District, ShenzhenTel: 0755-84576463/84576481 more>