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ASTM B631 Class A vs. Nickel 718

ASTM B631 class A belongs to the otherwise unclassified metals classification, while nickel 718 belongs to the nickel alloys. There are 16 material properties with values for both materials. Properties with values for just one material (19, 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 718.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 220
190
Poisson's Ratio 0.3
0.29
Shear Modulus, GPa 85 to 86
75

Thermal Properties

Latent Heat of Fusion, J/g 160
310
Melting Completion (Liquidus), °C 2680 to 2690
1340
Specific Heat Capacity, J/kg-K 160
450
Thermal Conductivity, W/m-K 420
11
Thermal Expansion, µm/m-K 11
13

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 40 to 47
1.4
Electrical Conductivity: Equal Weight (Specific), % IACS 25 to 29
1.5

Otherwise Unclassified Properties

Density, g/cm3 15
8.3
Embodied Carbon, kg CO2/kg material 43
13
Embodied Energy, MJ/kg 670
190

Common Calculations

Stiffness to Weight: Axial, points 8.5
13
Stiffness to Weight: Bending, points 14
23
Thermal Diffusivity, mm2/s 180
3.0