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ASTM B631 Class A vs. Nickel 684

ASTM B631 class A belongs to the otherwise unclassified metals classification, while nickel 684 belongs to the nickel alloys. There are 12 material properties with values for both materials. Properties with values for just one material (21, in this case) are not shown.

For each property being compared, the top bar is ASTM B631 class A and the bottom bar is nickel 684.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 220
200
Poisson's Ratio 0.3
0.29
Shear Modulus, GPa 85 to 86
76

Thermal Properties

Latent Heat of Fusion, J/g 160
320
Melting Completion (Liquidus), °C 2680 to 2690
1370
Specific Heat Capacity, J/kg-K 160
470
Thermal Expansion, µm/m-K 11
13

Otherwise Unclassified Properties

Density, g/cm3 15
8.3
Embodied Carbon, kg CO2/kg material 43
10
Embodied Energy, MJ/kg 670
140

Common Calculations

Stiffness to Weight: Axial, points 8.5
13
Stiffness to Weight: Bending, points 14
23