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R31538 Cobalt vs. C18200 Copper

R31538 cobalt belongs to the cobalt alloys classification, while C18200 copper belongs to the copper 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 R31538 cobalt and the bottom bar is C18200 copper.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 220
120
Elongation at Break, % 13 to 23
11 to 40
Poisson's Ratio 0.29
0.34
Shear Modulus, GPa 86
44
Tensile Strength: Ultimate (UTS), MPa 1020 to 1360
310 to 530
Tensile Strength: Yield (Proof), MPa 580 to 930
97 to 450

Thermal Properties

Latent Heat of Fusion, J/g 320
210
Melting Completion (Liquidus), °C 1360
1080
Melting Onset (Solidus), °C 1290
1070
Specific Heat Capacity, J/kg-K 450
390
Thermal Conductivity, W/m-K 13
320
Thermal Expansion, µm/m-K 13
18

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.0
80
Electrical Conductivity: Equal Weight (Specific), % IACS 2.1
81

Otherwise Unclassified Properties

Density, g/cm3 8.4
8.9
Embodied Carbon, kg CO2/kg material 8.1
2.6
Embodied Energy, MJ/kg 110
41
Embodied Water, L/kg 530
310

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 140 to 200
43 to 96
Resilience: Unit (Modulus of Resilience), kJ/m3 750 to 1920
40 to 860
Stiffness to Weight: Axial, points 15
7.3
Stiffness to Weight: Bending, points 24
18
Strength to Weight: Axial, points 34 to 45
9.6 to 16
Strength to Weight: Bending, points 27 to 32
11 to 16
Thermal Diffusivity, mm2/s 3.5
93
Thermal Shock Resistance, points 25 to 33
11 to 18

Alloy Composition

Carbon (C), % 0.15 to 0.35
0
Chromium (Cr), % 26 to 30
0.6 to 1.2
Cobalt (Co), % 58.7 to 68.9
0
Copper (Cu), % 0
98.6 to 99.4
Iron (Fe), % 0 to 0.75
0 to 0.1
Lead (Pb), % 0
0 to 0.050
Manganese (Mn), % 0 to 1.0
0
Molybdenum (Mo), % 5.0 to 7.0
0
Nickel (Ni), % 0 to 1.0
0
Nitrogen (N), % 0 to 0.25
0
Silicon (Si), % 0 to 1.0
0 to 0.1