Nickel 725 vs. ASTM B631 Class C

Nickel 725 belongs to the nickel alloys classification, while ASTM B631 class C belongs to the otherwise unclassified metals. There are 14 material properties with values for both materials. Properties with values for just one material (18, in this case) are not shown.

For each property being compared, the top bar is nickel 725 and the bottom bar is ASTM B631 class C.

Nickel Alloy 725 (N07725)ASTM B631 Class C Silver-Tungsten Electrical Contact Alloy

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa		200
Elastic (Young's, Tensile) Modulus, GPa		180 to 190

Poisson's Ratio		0.29
Poisson's Ratio		0.32

Shear Modulus, GPa		78
Shear Modulus, GPa		66 to 71

Thermal Properties

Latent Heat of Fusion, J/g		320
Latent Heat of Fusion, J/g		140 to 150

Melting Completion (Liquidus), °C		1340
Melting Completion (Liquidus), °C		2090 to 2230

Specific Heat Capacity, J/kg-K		440
Specific Heat Capacity, J/kg-K		180

Thermal Expansion, µm/m-K		13
Thermal Expansion, µm/m-K		14

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS		1.5
Electrical Conductivity: Equal Volume, % IACS		55 to 63

Electrical Conductivity: Equal Weight (Specific), % IACS		1.6
Electrical Conductivity: Equal Weight (Specific), % IACS		36 to 43

Otherwise Unclassified Properties

Density, g/cm³		8.5
Density, g/cm³		13 to 14

Embodied Carbon, kg CO₂/kg material		13
Embodied Carbon, kg CO₂/kg material		55 to 59

Embodied Energy, MJ/kg		190
Embodied Energy, MJ/kg		860 to 920

Common Calculations

Stiffness to Weight: Axial, points		13
Stiffness to Weight: Axial, points		7.4 to 7.6

Stiffness to Weight: Bending, points		23
Stiffness to Weight: Bending, points		14