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R31538 Cobalt vs. C75400 Nickel Silver

R31538 cobalt belongs to the cobalt alloys classification, while C75400 nickel silver belongs to the copper alloys. There are 26 material properties with values for both materials. Properties with values for just one material (8, in this case) are not shown.

For each property being compared, the top bar is R31538 cobalt and the bottom bar is C75400 nickel silver.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 220
120
Elongation at Break, % 13 to 23
2.0 to 43
Poisson's Ratio 0.29
0.32
Shear Modulus, GPa 86
46
Tensile Strength: Ultimate (UTS), MPa 1020 to 1360
370 to 630
Tensile Strength: Yield (Proof), MPa 580 to 930
130 to 590

Thermal Properties

Latent Heat of Fusion, J/g 320
200
Melting Completion (Liquidus), °C 1360
1080
Melting Onset (Solidus), °C 1290
1040
Specific Heat Capacity, J/kg-K 450
390
Thermal Conductivity, W/m-K 13
36
Thermal Expansion, µm/m-K 13
18

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.0
7.0
Electrical Conductivity: Equal Weight (Specific), % IACS 2.1
7.4

Otherwise Unclassified Properties

Density, g/cm3 8.4
8.5
Embodied Carbon, kg CO2/kg material 8.1
3.8
Embodied Energy, MJ/kg 110
59
Embodied Water, L/kg 530
300

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 140 to 200
12 to 120
Resilience: Unit (Modulus of Resilience), kJ/m3 750 to 1920
75 to 1450
Stiffness to Weight: Axial, points 15
7.9
Stiffness to Weight: Bending, points 24
19
Strength to Weight: Axial, points 34 to 45
12 to 21
Strength to Weight: Bending, points 27 to 32
13 to 19
Thermal Diffusivity, mm2/s 3.5
11
Thermal Shock Resistance, points 25 to 33
12 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
63.5 to 66.5
Iron (Fe), % 0 to 0.75
0 to 0.25
Lead (Pb), % 0
0 to 0.1
Manganese (Mn), % 0 to 1.0
0 to 0.5
Molybdenum (Mo), % 5.0 to 7.0
0
Nickel (Ni), % 0 to 1.0
14 to 16
Nitrogen (N), % 0 to 0.25
0
Silicon (Si), % 0 to 1.0
0
Zinc (Zn), % 0
16.2 to 22.5
Residuals, % 0
0 to 0.5