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ASTM B631 Class C vs. SAE-AISI A7 Steel

ASTM B631 class C belongs to the otherwise unclassified metals classification, while SAE-AISI A7 steel belongs to the iron alloys. There are 14 material properties with values for both materials. Properties with values for just one material (11, in this case) are not shown.

For each property being compared, the top bar is ASTM B631 class C and the bottom bar is SAE-AISI A7 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 180 to 190
190
Poisson's Ratio 0.32
0.29
Shear Modulus, GPa 66 to 71
72

Thermal Properties

Latent Heat of Fusion, J/g 140 to 150
260
Melting Completion (Liquidus), °C 2090 to 2230
1470
Specific Heat Capacity, J/kg-K 180
470
Thermal Conductivity, W/m-K 450 to 490
37
Thermal Expansion, µm/m-K 14
12

Otherwise Unclassified Properties

Density, g/cm3 13 to 14
7.7
Embodied Carbon, kg CO2/kg material 55 to 59
13
Embodied Energy, MJ/kg 860 to 920
200

Common Calculations

Stiffness to Weight: Axial, points 7.4 to 7.6
13
Stiffness to Weight: Bending, points 14
25
Thermal Diffusivity, mm2/s 180 to 200
10