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R31538 Cobalt vs. C12200 Copper

R31538 cobalt belongs to the cobalt alloys classification, while C12200 copper 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 C12200 copper.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 220
120
Elongation at Break, % 13 to 23
3.2 to 50
Poisson's Ratio 0.29
0.34
Shear Modulus, GPa 86
43
Tensile Strength: Ultimate (UTS), MPa 1020 to 1360
220 to 410
Tensile Strength: Yield (Proof), MPa 580 to 930
69 to 400

Thermal Properties

Latent Heat of Fusion, J/g 320
210
Melting Completion (Liquidus), °C 1360
1080
Melting Onset (Solidus), °C 1290
1030
Specific Heat Capacity, J/kg-K 450
390
Thermal Conductivity, W/m-K 13
340
Thermal Expansion, µm/m-K 13
17

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.0
85
Electrical Conductivity: Equal Weight (Specific), % IACS 2.1
85

Otherwise Unclassified Properties

Density, g/cm3 8.4
9.0
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
11 to 91
Resilience: Unit (Modulus of Resilience), kJ/m3 750 to 1920
21 to 690
Stiffness to Weight: Axial, points 15
7.2
Stiffness to Weight: Bending, points 24
18
Strength to Weight: Axial, points 34 to 45
6.9 to 13
Strength to Weight: Bending, points 27 to 32
9.1 to 14
Thermal Diffusivity, mm2/s 3.5
98
Thermal Shock Resistance, points 25 to 33
7.9 to 15

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
99.9 to 99.985
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
0.015 to 0.040
Silicon (Si), % 0 to 1.0
0