12Cr2Mo1R steel plate standards, flaw detection requirements, and heat treatment.

12Cr2Mo1R steel plate is a Cr-Mo series low-alloy steel primarily used for manufacturing equipment that withstands high pressure and temperature, such as pressure vessels in the petroleum chemical industry and power station boilers. "12" represents the carbon content in parts per thousand, "Cr" and "Mo" represent the chemical symbols for chromium and molybdenum respectively, and "R" indicates that the material is used for pressure vessels.

Execution Standard

The execution standard for 12Cr2Mo1R steel plate is GB/T 713-2014 "Steel Plates for Boilers and Pressure Vessels". This standard specifies the technical requirements for 12Cr2Mo1R steel plate, including chemical composition, mechanical properties, heat treatment, dimensions, shape, weight, inspection rules, packaging, marking, and quality certificates.

Chemical Composition

According to the GB/T 713-2014 standard, the chemical composition (mass fraction, %) of 12Cr2Mo1R steel plate is approximately as follows:

• Carbon (C): 0.08～0.15
• Silicon (Si): ≤0.15
• Manganese (Mn): 0.3～0.6
• Phosphorus (P): ≤0.010
• Sulfur (S): ≤0.007
• Nickel (Ni): ≤0.2
• Chromium (Cr): 2.0～2.5
• Molybdenum (Mo): 0.9～1.1
• Copper (Cu): ≤0.008

Mechanical Properties

The mechanical property requirements for 12Cr2Mo1R steel plate are as follows:

• Yield Strength (ReL): Ranging from ≥290 MPa to ≥470 MPa depending on the thickness of the steel plate
• Tensile Strength (Rm): 520～680 MPa
• Elongation (A): ≥19%
• Impact Absorbed Energy (KV2): ≥47J at 0°C
• 180° Bend Test: d=3a

Heat Treatment

12Cr2Mo1R steel plate is typically delivered in normalized and tempered condition, with a tempering temperature not lower than 675°C. The heat treatment process plays a crucial role in ensuring the mechanical properties and microstructure of the material.

Inspection Requirements

12Cr2Mo1R steel plate undergoes ultrasonic inspection according to the JB4730 standard on a sheet-by-sheet basis, requiring compliance with qualified levels to ensure the material is free from internal cracks or defects.

Application Fields

12Cr2Mo1R steel plate is widely used in:

• Pressure vessels, reactors, heat exchangers, etc., in the petroleum chemical industry.
• High-temperature components of power station boilers.
• High-temperature pipelines and valves.
• High-temperature and high-pressure components in shipbuilding.

Summary

12Cr2Mo1R steel plate offers significant advantages in pressure vessel and high-temperature applications due to its high-temperature performance, corrosion resistance, high strength, and good processability. Through precise control of chemical composition and heat treatment processes, 12Cr2Mo1R steel plate can maintain its performance in various high-temperature and high-pressure environments.