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C72150 Copper-nickel vs. R31539 Cobalt

C72150 copper-nickel belongs to the copper alloys classification, while R31539 cobalt belongs to the cobalt alloys. There are 26 material properties with values for both materials. Properties with values for just one material (7, in this case) are not shown.

For each property being compared, the top bar is C72150 copper-nickel and the bottom bar is R31539 cobalt.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 150
220
Elongation at Break, % 29
13 to 22
Poisson's Ratio 0.33
0.29
Shear Modulus, GPa 55
86
Tensile Strength: Ultimate (UTS), MPa 490
1000 to 1340
Tensile Strength: Yield (Proof), MPa 210
590 to 940

Thermal Properties

Latent Heat of Fusion, J/g 250
320
Melting Completion (Liquidus), °C 1210
1360
Melting Onset (Solidus), °C 1250
1290
Specific Heat Capacity, J/kg-K 410
450
Thermal Conductivity, W/m-K 22
13
Thermal Expansion, µm/m-K 14
13

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 3.5
2.0
Electrical Conductivity: Equal Weight (Specific), % IACS 3.6
2.1

Otherwise Unclassified Properties

Density, g/cm3 8.9
8.4
Embodied Carbon, kg CO2/kg material 6.1
8.2
Embodied Energy, MJ/kg 88
110
Embodied Water, L/kg 270
530

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 120
140 to 190
Resilience: Unit (Modulus of Resilience), kJ/m3 150
780 to 2000
Stiffness to Weight: Axial, points 9.1
15
Stiffness to Weight: Bending, points 20
24
Strength to Weight: Axial, points 15
33 to 44
Strength to Weight: Bending, points 15
27 to 32
Thermal Diffusivity, mm2/s 6.0
3.5
Thermal Shock Resistance, points 18
24 to 32

Alloy Composition


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Aluminum (Al), % 0
0.3 to 1.0
Carbon (C), % 0 to 0.1
0 to 0.14
Chromium (Cr), % 0
26 to 30
Cobalt (Co), % 0
57.7 to 68.7
Copper (Cu), % 52.5 to 57
0
Iron (Fe), % 0 to 0.1
0 to 0.75
Lanthanum (La), % 0
0.030 to 0.2
Lead (Pb), % 0 to 0.050
0
Manganese (Mn), % 0 to 0.050
0 to 1.0
Molybdenum (Mo), % 0
5.0 to 7.0
Nickel (Ni), % 43 to 46
0 to 1.0
Nitrogen (N), % 0
0 to 0.25
Silicon (Si), % 0 to 0.5
0 to 1.0
Zinc (Zn), % 0 to 0.2
0
Residuals, % 0 to 0.5
0