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R31538 Cobalt vs. C55181 Copper

R31538 cobalt belongs to the cobalt alloys classification, while C55181 copper belongs to the copper alloys. There are 18 material properties with values for both materials. Properties with values for just one material (14, in this case) are not shown.

For each property being compared, the top bar is R31538 cobalt and the bottom bar is C55181 copper.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 220
110
Poisson's Ratio 0.29
0.34
Shear Modulus, GPa 86
40
Tensile Strength: Ultimate (UTS), MPa 1020 to 1360
200

Thermal Properties

Latent Heat of Fusion, J/g 320
190
Melting Completion (Liquidus), °C 1360
790
Melting Onset (Solidus), °C 1290
710
Specific Heat Capacity, J/kg-K 450
410
Thermal Expansion, µm/m-K 13
16

Otherwise Unclassified Properties

Density, g/cm3 8.4
8.5
Embodied Carbon, kg CO2/kg material 8.1
2.4
Embodied Energy, MJ/kg 110
38
Embodied Water, L/kg 530
290

Common Calculations

Stiffness to Weight: Axial, points 15
7.0
Stiffness to Weight: Bending, points 24
19
Strength to Weight: Axial, points 34 to 45
6.5
Strength to Weight: Bending, points 27 to 32
8.9
Thermal Shock Resistance, points 25 to 33
8.2

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
92.4 to 93
Iron (Fe), % 0 to 0.75
0
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
Phosphorus (P), % 0
7.0 to 7.5
Silicon (Si), % 0 to 1.0
0
Residuals, % 0
0 to 0.15