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R31538 Cobalt vs. C74500 Nickel Silver

R31538 cobalt belongs to the cobalt alloys classification, while C74500 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 C74500 nickel silver.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 220
120
Elongation at Break, % 13 to 23
3.0 to 24
Poisson's Ratio 0.29
0.32
Shear Modulus, GPa 86
44
Tensile Strength: Ultimate (UTS), MPa 1020 to 1360
390 to 700
Tensile Strength: Yield (Proof), MPa 580 to 930
380 to 600

Thermal Properties

Latent Heat of Fusion, J/g 320
190
Melting Completion (Liquidus), °C 1360
1020
Melting Onset (Solidus), °C 1290
970
Specific Heat Capacity, J/kg-K 450
390
Thermal Conductivity, W/m-K 13
45
Thermal Expansion, µm/m-K 13
19

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.0
9.0
Electrical Conductivity: Equal Weight (Specific), % IACS 2.1
9.7

Otherwise Unclassified Properties

Density, g/cm3 8.4
8.3
Embodied Carbon, kg CO2/kg material 8.1
3.4
Embodied Energy, MJ/kg 110
54
Embodied Water, L/kg 530
310

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 140 to 200
12 to 160
Resilience: Unit (Modulus of Resilience), kJ/m3 750 to 1920
620 to 1540
Stiffness to Weight: Axial, points 15
7.7
Stiffness to Weight: Bending, points 24
19
Strength to Weight: Axial, points 34 to 45
13 to 23
Strength to Weight: Bending, points 27 to 32
14 to 21
Thermal Diffusivity, mm2/s 3.5
14
Thermal Shock Resistance, points 25 to 33
13 to 23

Alloy Composition

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
9.0 to 11
Nitrogen (N), % 0 to 0.25
0
Silicon (Si), % 0 to 1.0
0
Zinc (Zn), % 0
21.2 to 27.5
Residuals, % 0
0 to 0.5