SAE-AISI 8740 Steel vs. ASTM B631 Class C
SAE-AISI 8740 steel belongs to the iron alloys classification, while ASTM B631 class C belongs to the otherwise unclassified metals. There are 16 material properties with values for both materials. Properties with values for just one material (16, in this case) are not shown.
For each property being compared, the top bar is SAE-AISI 8740 steel and the bottom bar is ASTM B631 class C.
Metric UnitsUS Customary Units
Mechanical Properties
Elastic (Young's, Tensile) Modulus, GPa | 190 | |
180 to 190 |
Poisson's Ratio | 0.29 | |
0.32 |
Shear Modulus, GPa | 73 | |
66 to 71 |
Thermal Properties
Latent Heat of Fusion, J/g | 250 | |
140 to 150 |
Melting Completion (Liquidus), °C | 1460 | |
2090 to 2230 |
Specific Heat Capacity, J/kg-K | 470 | |
180 |
Thermal Conductivity, W/m-K | 39 | |
450 to 490 |
Thermal Expansion, µm/m-K | 13 | |
14 |
Electrical Properties
Electrical Conductivity: Equal Volume, % IACS | 7.3 | |
55 to 63 |
Electrical Conductivity: Equal Weight (Specific), % IACS | 8.4 | |
36 to 43 |
Otherwise Unclassified Properties
Density, g/cm3 | 7.8 | |
13 to 14 |
Embodied Carbon, kg CO2/kg material | 1.5 | |
55 to 59 |
Embodied Energy, MJ/kg | 20 | |
860 to 920 |
Common Calculations
Stiffness to Weight: Axial, points | 13 | |
7.4 to 7.6 |
Stiffness to Weight: Bending, points | 24 | |
14 |
Thermal Diffusivity, mm2/s | 10 | |
180 to 200 |