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C74500 Nickel Silver vs. R30021 Cobalt

C74500 nickel silver belongs to the copper alloys classification, while R30021 cobalt belongs to the cobalt 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 C74500 nickel silver and the bottom bar is R30021 cobalt.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 120
220
Elongation at Break, % 3.0 to 24
9.0
Poisson's Ratio 0.32
0.29
Shear Modulus, GPa 44
86
Tensile Strength: Ultimate (UTS), MPa 390 to 700
700
Tensile Strength: Yield (Proof), MPa 380 to 600
500

Thermal Properties

Latent Heat of Fusion, J/g 190
330
Melting Completion (Liquidus), °C 1020
1350
Melting Onset (Solidus), °C 970
1190
Specific Heat Capacity, J/kg-K 390
450
Thermal Conductivity, W/m-K 45
15
Thermal Expansion, µm/m-K 19
11

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 9.0
1.9
Electrical Conductivity: Equal Weight (Specific), % IACS 9.7
2.1

Otherwise Unclassified Properties

Density, g/cm3 8.3
8.4
Embodied Carbon, kg CO2/kg material 3.4
8.0
Embodied Energy, MJ/kg 54
110
Embodied Water, L/kg 310
520

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 12 to 160
57
Resilience: Unit (Modulus of Resilience), kJ/m3 620 to 1540
570
Stiffness to Weight: Axial, points 7.7
15
Stiffness to Weight: Bending, points 19
24
Strength to Weight: Axial, points 13 to 23
23
Strength to Weight: Bending, points 14 to 21
21
Thermal Diffusivity, mm2/s 14
3.8
Thermal Shock Resistance, points 13 to 23
21

Alloy Composition

Carbon (C), % 0
0.2 to 0.35
Chromium (Cr), % 0
26 to 29
Cobalt (Co), % 0
61.7 to 67.3
Copper (Cu), % 63.5 to 66.5
0
Iron (Fe), % 0 to 0.25
0 to 3.0
Lead (Pb), % 0 to 0.1
0
Manganese (Mn), % 0 to 0.5
0
Molybdenum (Mo), % 0
4.5 to 6.0
Nickel (Ni), % 9.0 to 11
2.0 to 3.0
Silicon (Si), % 0
0 to 1.5
Zinc (Zn), % 21.2 to 27.5
0
Residuals, % 0 to 0.5
0