SAE J404 Grade 8740
Equivalent material: AISI 8740, ASTM Grade L7C, ASTM Grade L73, DIN 1.6546, DIN 40NiCrMo2-2, AFNOR 40NCD2, BS 311-TYPE7, UNI 40NiCrM02(KB), UNE 40NiCrMo2, AISI 8640, AISI 8640H, AISI 8740H, SAE 8640, SAE 8640H, SAE 8740H, JIS SNCM240, JIS SNCMRCH240, JIS SNCMWCH240, EN 1.6546, GOST 38ChGNM, ASTM 8470, ASTM 8640H, ASTM 8640, UNS G86400, UNS H86400, UNS H87400, UNS G87400
SAE J404 Grade 8740 general
| Property |
Temperature |
Value |
Comment |
| Density |
23.0 °C |
Density of 7.8 - 7.9 g/cm³ |
Typical for Chromium Molybdenum Steel |
SAE J404 Grade 8740 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 |
SAE J404 Grade 8740 electrical
| Property |
Value |
| Carbon |
Carbon of 0.4 - 0.45 % |
| Chromium |
Chromium of 0.4 - 0.6 % |
| Manganese |
Manganese of 0.75 - 1 % |
| Molybdenum |
Molybdenum of 0.15 - 0.25 % |
| Nickel |
Nickel of 0.4 - 0.7 % |
| Phosphorus |
Phosphorus of 0.03 % |
| Silicon |
Silicon of 0.15 - 0.35 % |
| Sulfur |
Sulfur of 0.04 % |
SAE J404 Grade 8740 mechanical
| Property |
Temperature |
Value |
Comment |
| Elastic modulus |
23.0 °C |
Elastic modulus of 200 - 215 GPa |
Typical for Chromium Molybdenum Steel |
| Poisson's ratio |
23.0 °C |
Poisson's ratio of 0.29 [-] |
Typical for Chromium Molybdenum Steel |
