SAE J438b Grade T8
Equivalent material: AISI T8, GOST R9K5, UNS T12008
SAE J438b Grade T8 general
| Property |
Temperature |
Value |
Comment |
| Density |
23.0 °C |
Density of 7.72 - 8 g/cm³ |
Typical for Tool And Machining Steel |
SAE J438b Grade T8 thermal
| Property |
Temperature |
Value |
Comment |
| Coefficient of thermal expansion |
23.0 °C |
Coefficient of thermal expansion of 1E-5 - 1.3E-5 1/K |
Typical for Tool And Machining Steel |
| Melting point |
- |
Melting point of 1370 - 1425 °C |
Typical for Tool And Machining Steel |
| Specific heat capacity |
23.0 °C |
Specific heat capacity of 420 - 460 J/(kg·K) |
Typical for Tool And Machining Steel |
| Thermal conductivity |
23.0 °C |
Thermal conductivity of 17 - 42 W/(m·K) |
Typical for Tool And Machining Steel |
SAE J438b Grade T8 chemical
| Property |
Value |
| Carbon |
Carbon of 0.75 - 0.85 % |
| Chromium |
Chromium of 3.75 - 4.5 % |
| Cobalt |
Cobalt of 4.25 - 5.75 % |
| Manganese |
Manganese of 0.2 - 0.4 % |
| Molybdenum |
Molybdenum of 0.7 - 1 % |
| Silicon |
Silicon of 0.2 - 0.4 % |
| Tungsten |
Tungsten of 13.25 - 14.75 % |
| Vanadium |
Vanadium of 1.8 - 2.4 % |
SAE J438b Grade T8 mechanical
| Property |
Temperature |
Value |
Comment |
| Elastic modulus |
23.0 °C |
Elastic modulus of 203 - 211 GPa |
Typical for Tool And Machining Steel |
| Poisson's ratio |
23.0 °C |
Poisson's ratio of 0.3 [-] |
Typical for Tool And Machining Steel |
| Shear modulus |
23.0 °C |
Shear modulus of 79 GPa |
Typical for Tool And Machining Steel |
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