ASTM B631 Class C vs. ASTM B631 Class A
Both ASTM B631 class C and ASTM B631 class A are otherwise unclassified metals.
For each property being compared, the top bar is ASTM B631 class C and the bottom bar is ASTM B631 class A.
Metric UnitsUS Customary Units
Mechanical Properties
Elastic (Young's, Tensile) Modulus, GPa | 180 to 190 | |
220 |
Poisson's Ratio | 0.32 | |
0.3 |
Rockwell B Hardness | 43 to 68 | |
63 to 98 |
Shear Modulus, GPa | 66 to 71 | |
85 to 86 |
Thermal Properties
Latent Heat of Fusion, J/g | 140 to 150 | |
160 |
Melting Completion (Liquidus), °C | 2090 to 2230 | |
2680 to 2690 |
Specific Heat Capacity, J/kg-K | 180 | |
160 |
Thermal Conductivity, W/m-K | 450 to 490 | |
420 |
Thermal Expansion, µm/m-K | 14 | |
11 |
Electrical Properties
Electrical Conductivity: Equal Volume, % IACS | 55 to 63 | |
40 to 47 |
Electrical Conductivity: Equal Weight (Specific), % IACS | 36 to 43 | |
25 to 29 |
Otherwise Unclassified Properties
Density, g/cm3 | 13 to 14 | |
15 |
Embodied Carbon, kg CO2/kg material | 55 to 59 | |
43 |
Embodied Energy, MJ/kg | 860 to 920 | |
670 |
Common Calculations
Stiffness to Weight: Axial, points | 7.4 to 7.6 | |
8.5 |
Stiffness to Weight: Bending, points | 14 | |
14 |
Thermal Diffusivity, mm2/s | 180 to 200 | |
180 |