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ASTM B631 Class B vs. AWS BNi-5a

ASTM B631 class B belongs to the otherwise unclassified metals classification, while AWS BNi-5a belongs to the nickel alloys. There are 12 material properties with values for both materials. Properties with values for just one material (13, in this case) are not shown.

For each property being compared, the top bar is ASTM B631 class B and the bottom bar is AWS BNi-5a.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 210
190
Poisson's Ratio 0.31
0.29
Shear Modulus, GPa 78 to 79
72

Thermal Properties

Latent Heat of Fusion, J/g 150
420
Melting Completion (Liquidus), °C 2460 to 2480
1150
Specific Heat Capacity, J/kg-K 170
500
Thermal Expansion, µm/m-K 12
12

Otherwise Unclassified Properties

Density, g/cm3 14
7.9
Embodied Carbon, kg CO2/kg material 49
9.0
Embodied Energy, MJ/kg 760
130

Common Calculations

Stiffness to Weight: Axial, points 8.1
13
Stiffness to Weight: Bending, points 14
24