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R31538 Cobalt vs. C97400 Nickel Silver

R31538 cobalt belongs to the cobalt alloys classification, while C97400 nickel silver belongs to the copper alloys. There are 26 material properties with values for both materials. Properties with values for just one material (6, in this case) are not shown.

For each property being compared, the top bar is R31538 cobalt and the bottom bar is C97400 nickel silver.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 220
120
Elongation at Break, % 13 to 23
20
Poisson's Ratio 0.29
0.33
Shear Modulus, GPa 86
44
Tensile Strength: Ultimate (UTS), MPa 1020 to 1360
260
Tensile Strength: Yield (Proof), MPa 580 to 930
120

Thermal Properties

Latent Heat of Fusion, J/g 320
190
Melting Completion (Liquidus), °C 1360
1100
Melting Onset (Solidus), °C 1290
1070
Specific Heat Capacity, J/kg-K 450
380
Thermal Conductivity, W/m-K 13
27
Thermal Expansion, µm/m-K 13
18

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.0
6.0
Electrical Conductivity: Equal Weight (Specific), % IACS 2.1
6.3

Otherwise Unclassified Properties

Density, g/cm3 8.4
8.6
Embodied Carbon, kg CO2/kg material 8.1
4.1
Embodied Energy, MJ/kg 110
64
Embodied Water, L/kg 530
320

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 140 to 200
43
Resilience: Unit (Modulus of Resilience), kJ/m3 750 to 1920
59
Stiffness to Weight: Axial, points 15
7.5
Stiffness to Weight: Bending, points 24
19
Strength to Weight: Axial, points 34 to 45
8.5
Strength to Weight: Bending, points 27 to 32
11
Thermal Diffusivity, mm2/s 3.5
8.3
Thermal Shock Resistance, points 25 to 33
8.8

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 to 61
Iron (Fe), % 0 to 0.75
0 to 1.5
Lead (Pb), % 0
4.5 to 5.5
Manganese (Mn), % 0 to 1.0
0 to 0.5
Molybdenum (Mo), % 5.0 to 7.0
0
Nickel (Ni), % 0 to 1.0
15.5 to 17
Nitrogen (N), % 0 to 0.25
0
Silicon (Si), % 0 to 1.0
0
Tin (Sn), % 0
2.5 to 3.5
Zinc (Zn), % 0
10 to 19.5
Residuals, % 0
0 to 1.0