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ASTM B631 Class A vs. ACI-ASTM CB6 Steel

ASTM B631 class A belongs to the otherwise unclassified metals classification, while ACI-ASTM CB6 steel belongs to the iron alloys. There are 16 material properties with values for both materials. Properties with values for just one material (17, in this case) are not shown.

For each property being compared, the top bar is ASTM B631 class A and the bottom bar is ACI-ASTM CB6 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 220
200
Poisson's Ratio 0.3
0.28
Shear Modulus, GPa 85 to 86
77

Thermal Properties

Latent Heat of Fusion, J/g 160
280
Melting Completion (Liquidus), °C 2680 to 2690
1440
Specific Heat Capacity, J/kg-K 160
480
Thermal Conductivity, W/m-K 420
17
Thermal Expansion, µm/m-K 11
10

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 40 to 47
2.2
Electrical Conductivity: Equal Weight (Specific), % IACS 25 to 29
2.6

Otherwise Unclassified Properties

Density, g/cm3 15
7.8
Embodied Carbon, kg CO2/kg material 43
2.5
Embodied Energy, MJ/kg 670
36

Common Calculations

Stiffness to Weight: Axial, points 8.5
14
Stiffness to Weight: Bending, points 14
25
Thermal Diffusivity, mm2/s 180
4.6