SCM415 Equivalent Material

SCM415 is a low-alloy chromium-molybdenum steel defined by the Japanese Industrial Standard (JIS). It's widely used in industrial applications where high strength and durability are required. The following table outlines the equivalent materials of SCM415 across different standards and regions.

Table of contents

  • SCM415 Chromoly Chemical Composition
  • SCM415 Steel Mechanical Properties
  • SCM415 Equivalent Materials
  • Physical Properties of SCM415
  • Annealing of SCM415 Alloy Steel
  • Hardening of Acero SCM415
  • Tempering of Case-Hardened SCM415
  • Forging of X30WCRV93KU Grade
  • Thermal Properties of JIS G4105 SCM415
  • Hardness of SCM415 Material
  • Density of 15CrMo
  • Fatigue Strength of DIN 1.7262
  • What Is SCM415 Steel?
  • Heat Treatment Conditions for 15CrMo
  • Surface Finish Options for SCM415

Chemical Composition of SCM415

Carbon
0.38–0.43%
Manganese
0.75–1.00%
Phosphorus
≤0.035%
Sulfur
≤0.040%
Chromium
1.10%
Molybdenum
0.15–0.25%
Iron
97.25%

DIN 1.7262: High-Quality Quenched and Tempered Steel

DIN 1.7262 is a high-quality quenched and tempered steel known for its excellent mechanical properties. This process enhances its hardness, ductility, and overall strength, making it ideal for critical applications.

Mechanical Properties of SCM415

Elastic Modulus Bulk Modulus Tensile Strength Yield Strength
GPa GPa Mpa Mpa
190–210 140 655 415

Equivalent Materials to SCM415

Japan China France Italy Germany England
JIS SCM415 GB 15CrMo AFNOR 15CD4.05 UNI X30WCRV93KU DIN 1.7262 / 15CrMo BS 1501-620 / Cr31

Physical Properties of SCM415

Specific Heat (J/kgK) Temperature (°C/F) Thermal Conductivity (W/mK) Modulus of Elasticity (kN/mm²)
43 44 14 321

Annealing of SCM415 Alloy Steel

Annealing Temperature 800–850°C (1472–1562°F)

Carburizing Hardening of SCM415

SCM415 undergoes carburizing hardening to enhance its surface wear resistance and fatigue strength. This treatment creates a tough, high-carbon surface layer that improves the material’s ability to withstand pressure and stress in harsh environments.

Hardening of Acero SCM415

Hardening Temperature 840–875°C (1544–1607°F)

Tempering of Case-Hardened SCM415

Tempering Temperature 500–700°C (932–1292°F)

15CrMo Yield Strength and Forging Temperature

The yield strength of 15CrMo is 415 MPa, making it suitable for use in boilers, pressure vessels, and high-pressure pipes. Proper forging temperature control is crucial to achieve optimal mechanical properties and microstructure.

Forging of X30WCRV93KU Grade

Forging Temperature 840–875°C (1544–1607°F)

Thermal Properties of JIS G4105 SCM415

Thermal Conductivity (@ 100°C) 296 BTU in/hr.ft².°F | 42.6 W/mK
Thermal Expansion Coefficient (@ 0–100°C) 6.78 µin/in°F | 12.2 µm/m°C

Hardness of SCM415

Hardness 28–34 HRc
SCM415 Melting Range and Density

SCM415 has a melting range between 1382–1529°C. Its density typically falls within 7.8–7.9 g/cm³, which is typical for low-alloy steels based primarily on iron.

Density of 15CrMo

Density 7.8–7.9 g/cm³
High Rigidity and Fatigue Strength of SCM415

X30WCRV93KU exhibits high rigidity due to its molybdenum and chromium content, allowing it to bear heavy loads without deformation. When SCM415 is case-hardened, the surface becomes harder, improving fatigue resistance. However, proper execution of the process is essential to maintain the material's integrity.

Fatigue Strength of DIN 1.7262

Fatigue Strength 275 MPa

What Is SCM415 Steel?

SCM415 is a high-quality quenched and tempered alloy structural steel. It belongs to the category of medium carbon steels that are oil-quenched and surface-treated for enhanced performance.

Heat Treatment Conditions for 15CrMo

  • Ac: 770–835°C
  • Ar: 770–700°C
  • Ms: 410°C

Surface Finish Options for SCM415

  • Black Surface
  • Grounded
  • Peeled / Turned
  • Polished

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