ASTM A320 Grade L7 Quenched and Tempered
Equivalent material: DIN 1.7225, DIN 42CrMo4, DIN 42CrMo4V, DIN 41CrMo4V, AFNOR 42CD4, BS 708M40, BS 709M40, BS EN19, UNI 42CrMo4, SS 2244, UNE 42CrMo4, UNE F.125, AISI 4140, AISI 4140H, AISI 4142H, AISI 4142, AISI 4145, AISI NV-7, SAE 4140, SAE 4140H, SAE 4142H, SAE 4142, SAE 4145, SAE NV-7, JIS SCM440, JIS SCM440M, JIS SCM440H, JIS SNB7, EN 42CrMo4, EN 42CrMo4V, EN 41CrMo4V, EN 1.7225, GOST 38ChM, GB/T 42CrMo, GB/T A30425, ASTM 4140H, ASTM 4142H, ASTM 4145, ASTM Grade B7, ASTM Grade B7M, ASTM Grade 12, ASTM Grade 7M, UNS G41400, UNS H41400, UNS H41420, UNS G41420, UNS G41450, IS 40Cr1Mo28, ASTM Grade L7M, ASTM Grade L70
ASTM A320 Grade L7 Quenched and Tempered general
| Property |
Temperature |
Value |
Comment |
| Density |
23.0 °C |
Density of 7.8 - 7.9 g/cm³ |
Typical for Chromium Molybdenum Steel |
ASTM A320 Grade L7 Quenched and Tempered thermal
| Property |
Temperature |
Value |
Comment |
| Coefficient of thermal expansion |
23.0 °C |
Coefficient of thermal expansion of 1.1E-5 - 1.4E-5 1/K |
Typical for Chromium Molybdenum Steel |
| Melting point |
- |
Melting point of 1382 - 1529 °C |
Typical for Chromium Molybdenum Steel |
| Specific heat capacity |
23.0 °C |
Specific heat capacity of 448 - 502 J/(kg·K) |
Typical for Chromium Molybdenum Steel |
| Thermal conductivity |
23.0 °C |
Thermal conductivity of 36 - 43 W/(m·K) |
Typical for Chromium Molybdenum Steel |
ASTM A320 Grade L7 Quenched and Tempered chemical
| Property |
Value |
| Carbon |
Carbon of 0.38 - 0.48 % |
| Chromium |
Chromium of 0.8 - 1.1 % |
| Manganese |
Manganese of 0.75 - 1 % |
| Molybdenum |
Molybdenum of 0.15 - 0.25 % |
| Phosphorus |
Phosphorus of 0.04 % |
| Silicon |
Silicon of 0.15 - 0.35 % |
| Sulfur |
Sulfur of 0.04 % |
ASTM A320 Grade L7 Quenched and Tempered mechanical
| Property |
Temperature |
Value |
Comment |
| Charpy impact energy |
23.0 °C |
Charpy impact energy of 27 J |
- |
| Elastic modulus |
23.0 °C |
Elastic modulus of 200 - 215 GPa |
Typical for Chromium Molybdenum Steel |
| Elongation A50 |
23.0 °C |
Elongation A50 of 16 % |
- |
| Hardness, Brinell |
23.0 °C |
Hardness, Brinell of 321 [-] |
- |
| Hardness, Rockwell C |
23.0 °C |
Hardness, Rockwell C of 35 [-] |
- |
| Poisson's ratio |
23.0 °C |
Poisson's ratio of 0.29 [-] |
Typical for Chromium Molybdenum Steel |
| Reduction of area |
23.0 °C |
Reduction of area of 50 % |
- |
| Tensile strength |
23.0 °C |
Tensile strength of 860 MPa |
- |
| Yield strength Rp0.2 |
23.0 °C |
Yield strength Rp0.2 of 725 MPa |
- |
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