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R31538 Cobalt vs. C73100 Nickel Silver

R31538 cobalt belongs to the cobalt alloys classification, while C73100 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 C73100 nickel silver.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 220
110
Elongation at Break, % 13 to 23
3.4 to 8.0
Poisson's Ratio 0.29
0.32
Shear Modulus, GPa 86
43
Tensile Strength: Ultimate (UTS), MPa 1020 to 1360
450 to 640
Tensile Strength: Yield (Proof), MPa 580 to 930
420 to 590

Thermal Properties

Latent Heat of Fusion, J/g 320
190
Melting Completion (Liquidus), °C 1360
1030
Melting Onset (Solidus), °C 1290
1000
Specific Heat Capacity, J/kg-K 450
390
Thermal Conductivity, W/m-K 13
35
Thermal Expansion, µm/m-K 13
19

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.0
7.5
Electrical Conductivity: Equal Weight (Specific), % IACS 2.1
8.0

Otherwise Unclassified Properties

Density, g/cm3 8.4
8.4
Embodied Carbon, kg CO2/kg material 8.1
3.0
Embodied Energy, MJ/kg 110
49
Embodied Water, L/kg 530
310

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 140 to 200
21 to 35
Resilience: Unit (Modulus of Resilience), kJ/m3 750 to 1920
790 to 1560
Stiffness to Weight: Axial, points 15
7.5
Stiffness to Weight: Bending, points 24
19
Strength to Weight: Axial, points 34 to 45
15 to 21
Strength to Weight: Bending, points 27 to 32
15 to 20
Thermal Diffusivity, mm2/s 3.5
11
Thermal Shock Resistance, points 25 to 33
15 to 21

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
70.8 to 78
Iron (Fe), % 0 to 0.75
0 to 0.1
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
4.0 to 6.0
Nitrogen (N), % 0 to 0.25
0
Silicon (Si), % 0 to 1.0
0
Tin (Sn), % 0
0 to 0.1
Zinc (Zn), % 0
18 to 22
Residuals, % 0
0 to 0.5