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ASTM B631 Class A vs. C72500 Copper-nickel

ASTM B631 class A belongs to the otherwise unclassified metals classification, while C72500 copper-nickel belongs to the copper alloys. There are 17 material properties with values for both materials. Properties with values for just one material (9, in this case) are not shown.

For each property being compared, the top bar is ASTM B631 class A and the bottom bar is C72500 copper-nickel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 220
120
Poisson's Ratio 0.3
0.34
Rockwell B Hardness 63 to 98
75 to 100
Shear Modulus, GPa 85 to 86
45

Thermal Properties

Latent Heat of Fusion, J/g 160
210
Melting Completion (Liquidus), °C 2680 to 2690
1130
Specific Heat Capacity, J/kg-K 160
390
Thermal Conductivity, W/m-K 420
54
Thermal Expansion, µm/m-K 11
17

Electrical Properties

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

Otherwise Unclassified Properties

Density, g/cm3 15
8.9
Embodied Carbon, kg CO2/kg material 43
3.6
Embodied Energy, MJ/kg 670
55

Common Calculations

Stiffness to Weight: Axial, points 8.5
7.6
Stiffness to Weight: Bending, points 14
19
Thermal Diffusivity, mm2/s 180
16