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R31538 Cobalt vs. C76400 Nickel Silver

R31538 cobalt belongs to the cobalt alloys classification, while C76400 nickel silver belongs to the copper alloys. There are 22 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 R31538 cobalt and the bottom bar is C76400 nickel silver.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 220
120
Poisson's Ratio 0.29
0.32
Shear Modulus, GPa 86
46
Tensile Strength: Ultimate (UTS), MPa 1020 to 1360
590 to 610

Thermal Properties

Latent Heat of Fusion, J/g 320
200
Melting Completion (Liquidus), °C 1360
990
Melting Onset (Solidus), °C 1290
950
Specific Heat Capacity, J/kg-K 450
400
Thermal Conductivity, W/m-K 13
31
Thermal Expansion, µm/m-K 13
18

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.0
5.7
Electrical Conductivity: Equal Weight (Specific), % IACS 2.1
6.1

Otherwise Unclassified Properties

Density, g/cm3 8.4
8.4
Embodied Carbon, kg CO2/kg material 8.1
4.1
Embodied Energy, MJ/kg 110
63
Embodied Water, L/kg 530
300

Common Calculations

Stiffness to Weight: Axial, points 15
8.1
Stiffness to Weight: Bending, points 24
20
Strength to Weight: Axial, points 34 to 45
19 to 20
Strength to Weight: Bending, points 27 to 32
18 to 19
Thermal Diffusivity, mm2/s 3.5
9.3
Thermal Shock Resistance, points 25 to 33
19 to 20

Alloy Composition


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Carbon (C), % 0.15 to 0.35
0
Chromium (Cr), % 26 to 30
0
Cobalt (Co), % 58.7 to 68.9
0
Copper (Cu), % 0
58.5 to 61.5
Iron (Fe), % 0 to 0.75
0 to 0.25
Lead (Pb), % 0
0 to 0.050
Manganese (Mn), % 0 to 1.0
0 to 0.5
Molybdenum (Mo), % 5.0 to 7.0
0
Nickel (Ni), % 0 to 1.0
16.5 to 19.5
Nitrogen (N), % 0 to 0.25
0
Silicon (Si), % 0 to 1.0
0
Zinc (Zn), % 0
17.7 to 25
Residuals, % 0
0 to 0.5