ASTM A320 Grade L7B Quenched and Tempered
Equivalent material: DIN 1.7220, DIN 34CrMo4, AFNOR 35CD4, BS 708A37, UNI 35CrMo4, SS 2234, UNE 34CrMo4, AISI 4137, AISI 4135, AISI 4135H, AISI 4137H, SAE 4137, SAE 4135, SAE 4135H, SAE 4137H, JIS SCM435, JIS SCCRM3, JIS STH22, JIS SCM3H, JIS SCCrM3, JIS SCM435H, JIS SCM435TK, JIS SCM435M, JIS SCM432, JIS SCM430M, EN 34CrMo4, EN 1.7220, GOST 34ChM, GB ML30CrMo, ASTM 4135H, ASTM 4137, ASTM 4135, ASTM Grade L72, UNS G41350, UNS G41370, UNS H41350, UNS H41370
ASTM A320 Grade L7B 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 L7B 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 L7B Quenched and Tempered chemical
| Property |
Value |
| Carbon |
Carbon of 0.35 - 0.4 % |
| Chromium |
Chromium of 0.8 - 1.1 % |
| Manganese |
Manganese of 0.7 - 0.9 % |
| 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 L7B 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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