SCM415 Alloy Structural Steel

SCM415 is a Japanese steel grade, equivalent to the domestic grade 15CrMo, and corresponds to ISO-693-17-1999's 15CrMo4. This steel is a low-carbon alloy steel with high thermal strength and oxidation resistance, as well as good comprehensive mechanical properties. It is an alloy structural steel used in boilers and steam turbines for superheater tubes, steam conduits, and corresponding forgings in high-pressure boilers below 530°C.

 

Basic Information

Chinese Name

SCM415

 

Foreign Name

15CrMo4

 

Material Grade

SCM415

 

 

Country and Region

Japan

 

Steel Group

 Low-Carbon Alloy Steel

 

Introduction

Standard: JIS G4053 Low-alloyed steels for machine structural use

 

And: JIS G4105 Chromium molybdenum steels

 

Equivalent to China's: 15CrMo

 

Japan's old grade is SCM21. Fully carburized heat treatment with inner and outer diameter grinding, strong toughness, super wear resistance, stable quality, suitable for: cylinder pistons. SCM415 chromium-molybdenum alloy steel, after carburizing treatment, surface hardness reaches HRC 62-64. It is a pearlitic heat-resistant steel with high strength, slightly lower toughness, high endurance strength, good machinability and cold deformation plasticity, and acceptable weldability. Generally used in normalized and high-temperature tempered states.

 

Chemical Composition (%)

C: 0.13-0.18

 

Si: 0.15-0.35

 

Mn: 0.60-0.85

 

P: Below 0.03

 

S: Below 0.03

 

Cr: 0.9-1.2

 

Mo: 0.15-0.3

 

Available Specifications

SCM415

 

Φ30

 

Alloy Steel

 

SCM415

 

Φ35

 

Alloy Steel

 

SCM415

 

Φ40

 

Alloy Steel

 

SCM415

 

Φ45

 

Alloy Steel

 

SCM415

 

Φ45

 

Alloy Steel

 

SCM415

 

Φ50

 

Alloy Steel

 

SCM415

 

Φ60

 

Alloy Steel

 

SCM415

 

Φ65

 

Alloy Steel

 

SCM415

 

Φ70

 

Alloy Steel

 

SCM415

 

Φ80

 

Alloy Steel

 

SCM415

 

Φ90

 

Alloy Steel

 

SCM415

 

Φ100

 

Alloy Steel

 

SCM415

 

Φ20-400

 

Alloy Steel

 

SCM415

 

5-50

 

Steel Plate

 

Mechanical Properties

Tensile Strength σb (MPa): ≥440(45)

 

Yield Strength σs (MPa): ≥295(30)

 

Elongation δ5 (%): ≥22, Reduction of Area ψ (%): ≥60

 

Impact Energy Akv (J): ≥94

 

Impact Toughness Value αkv (J/cm²): ≥118(12)

 

Hardness: ≤179HB Sample Size: Sample blank size is 30mm

 

Heat Treatment Specification:

 

Quenching 900°C, air cooling; Tempering 650°C, air cooling.

 

Metallographic Structure: Ferrite + Pearlite + Small Amount of Bainite 20CrMnTi 30CrMnTi 20CrMnTi Round Steel

Mold Steel Cr12, Cr12MoV, Cr12Mo1V1, H13, 718#, P20, 5CrNiMo, 5CrMnMo, CrWMn

 

Tool Steel 9SiCr, 9Cr2, 7CrSiMnMoV, 5-6CrW2Si, 8Cr3, 9Mn2V, 4Cr5W2VSi

 

Tool Steel 30Cr3W, 4Cr2MoVNi, 3Cr2WMoVNi, SKD11     

 

Alloy Structural Steel 20-30CrMnTi, 20CrNiMo, 15Cr2Mo1, 15-42CrMo

 

Alloy Structural Steel 20-40Cr, 35CrMoV, 20CrNi2MoA, 20-50CrV

 

Alloy Structural Steel 20MnV, 20-40CrMnMo, 20-35CrMnSi, 38CrSi, 38CrMoAl, 20-40CrNi

 

Alloy Structural Steel 45CrNiMoVA, 12-37CrNi3 12-20Cr2Ni4A, 18CrNiMo7-6, 17CrNiMo

 

Alloy Structural Steel 40CrNiMo, 37SiMn2MoV, 19-50Mn2, 25Cr2MoV, 20SiMn2MoV, 12CrNi2

 

Alloy Structural Steel 12Cr1MoV, 12-37CrNi3MoA, 20Ni4MoA, 35SiMn, 35CrNi3W, 20CrNiMoH

 

Alloy Structural Steel 15-40CrMn, 25Cr2Mo1V, 45MnMo, 40CrMoV, 60CrMoV, 27CrMoTi

 

Alloy Structural Steel 34CrNiMo6 30CrNi2MoV 18CrNiMnMoA 17-34Cr2Ni2Mo

 

Alloy Structural Steel 30Cr1Mo1V 20CrNiMo1V 18CrNiMo7-6

 

Alloy Structural Steel: 39CrNiMo3 30CrNiMo8 17CrNiMo6 31CrMoV9 18CrNiMo5 18CrMnNiMoV

 

Alloy Structural Steel 42CrNiMoV 34CrNi2MoV 40CrNi2Mo

 

Spring Steel: 60Si2Mn

 

Carbon Tool Steel: T8-T10A

 

Heat-Resistant Steel 1Cr5Mo 4Cr10Si2Mo 4Cr9Si2

 

Carbon Steel 20-60# 15-65Mn

 

Stainless Steel 2-4Cr13 4Cr13MoV

 

Bearing Steel GCr15 GCr15SiMn G20CrNiMoA G20CrNi2MoA G20CrNi4

 

Roll Steel 9Cr2Mo 9Cr2MoV 86CrMoV7 9CrV

 

American Standard Special Steel Forged Round 1045 1008 5140 4140 13210 52100 1335 4130 6470 4118 3240

 

Metal Supply 5CrNiMoV 080M40 21CrMoV5-11 20SiMn2Mo2 16CrNiMo16 Cr5Mo1V

 

AMS6302 5Cr3Mn1SiMoV 18CrNiMo5 9Cr1Mo g56NiCrMoV 20MnCr5 28Mn6 17CrNi6-6 16MnCrB5 AISI4130、、X45NiCrMo4 4Cr3Mo3SiV EN-36C 39CrNi3MO SNCM630 sncm439 30CrNiMo8V 34CrNiMo6V 18CrNiMo7-6 21CrMoV-B2 A350 32CrMo12 SCM420H EN-24 Q390D 34CrNo1 SCM415 5NiCrMoV7 20Mn5N 655M13 709M40 817M40 835M30 SACM645 655M13 16MnCr5A 18CrNiMo7-6BBBBG EN-25 AISI9315 30CrNiMo8 X210CrW12 A2 H12

 

Japanese Standard; S20C. S45C ..S40C. SUJ2. SCr415. SCr440. SCM420. SCM440. SACM645. SUP10. S30C. SWRH18. SMn433. SCM435

  Korean Standard; SM45C. SM58C. SWRCH30K. SM58C. SMn420. SCr415. SCM418. SCM440. SCM435. SMnC420. SNC415. SNC236. STB2. STD11 STF4.

  American Steel: D6 D3 D2 A2 A6 A8 M4 3V 10V 01 H13 H23 H42 A2 A5 A6 A10 D2 D3 D7 O1 O2 O6 S1 S2 S6 P2 P3 P20 F1 F2 L2 L3 L6 T1 F2 F8 T15 M1 M2 M30 M6 HAP-10 HAP-60 KHA 33N 1005 1018 1020 1035 1042 1053 1069 1071 1086 1095 1513 1524 1548 1566 1572 M1008 M1020 2317 2340 2512 3115 3135 3245 3450 4012 4024 4121 4150 4608 4715 4820 5015 5120 6115 6195 7260 8120 8622 8742 9254 9260

 

Russian Standard; . CT3CPX. CT6cpX. 20T2. 45T2. 35X. 40X. 50X. 15XM. 38XC. 30XMA. 38XM. 40XMΦA. 40XΦA. 18XT. 20XH. 40XH. 20XH3A. y7-1.

 

German Standard, C45 100Cr6 .41Cr4 .20Mn5. 13CrMo44 .42CrMo4. 20Cr4. 18NiCr8. 34CrAlMo5. 36NiCr6. C60.

 

French Standard; XC45, XC55, C22E, C45E, 20M5, 40M5, 18C3, 42C4,.42CD4, 18CD4.

 

35CD4, 50CV4, 100C6, 55NCDV7, Z200C12, 1054WC13, XC12, 32M5, SCr420H, SCr445. SMn420

 

Supply British Standard Export Tax Rebate Special Steel Forged Round; 050A20, 080M46, 080A20, 030A52, 150M19, En46, 527A19