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ASTM B522 Class II vs. ASTM B631 Class A

Both ASTM B522 class II and ASTM B631 class A are otherwise unclassified metals. There are 12 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 ASTM B522 class II and the bottom bar is ASTM B631 class A.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 96
220
Poisson's Ratio 0.41
0.3
Shear Modulus, GPa 34
85 to 86

Thermal Properties

Latent Heat of Fusion, J/g 77
160
Melting Completion (Liquidus), °C 1030
2680 to 2690
Specific Heat Capacity, J/kg-K 160
160
Thermal Expansion, µm/m-K 15
11

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 11
40 to 47
Electrical Conductivity: Equal Weight (Specific), % IACS 5.7
25 to 29

Otherwise Unclassified Properties

Density, g/cm3 17
15

Common Calculations

Stiffness to Weight: Axial, points 3.1
8.5
Stiffness to Weight: Bending, points 8.9
14