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ASTM A732 Cast Steel vs. ASTM B631 Class A

ASTM A732 cast steel belongs to the iron alloys classification, while ASTM B631 class A belongs to the otherwise unclassified metals. There are 16 material properties with values for both materials. Properties with values for just one material (15, in this case) are not shown.

For each property being compared, the top bar is ASTM A732 cast steel and the bottom bar is ASTM B631 class A.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 190
220
Poisson's Ratio 0.29
0.3
Shear Modulus, GPa 72 to 73
85 to 86

Thermal Properties

Latent Heat of Fusion, J/g 250 to 260
160
Melting Completion (Liquidus), °C 1440 to 1460
2680 to 2690
Specific Heat Capacity, J/kg-K 470 to 480
160
Thermal Conductivity, W/m-K 39 to 50
420
Thermal Expansion, µm/m-K 13
11

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 7.1 to 7.7
40 to 47
Electrical Conductivity: Equal Weight (Specific), % IACS 8.2 to 8.9
25 to 29

Otherwise Unclassified Properties

Density, g/cm3 7.8 to 7.9
15
Embodied Carbon, kg CO2/kg material 1.4 to 1.7
43
Embodied Energy, MJ/kg 19 to 24
670

Common Calculations

Stiffness to Weight: Axial, points 13
8.5
Stiffness to Weight: Bending, points 24
14
Thermal Diffusivity, mm2/s 10 to 14
180