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C12000 Copper vs. R30021 Cobalt

C12000 copper 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 C12000 copper and the bottom bar is R30021 cobalt.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 120
220
Elongation at Break, % 2.8 to 50
9.0
Poisson's Ratio 0.34
0.29
Shear Modulus, GPa 43
86
Tensile Strength: Ultimate (UTS), MPa 230 to 410
700
Tensile Strength: Yield (Proof), MPa 77 to 400
500

Thermal Properties

Latent Heat of Fusion, J/g 210
330
Melting Completion (Liquidus), °C 1080
1350
Melting Onset (Solidus), °C 1080
1190
Specific Heat Capacity, J/kg-K 390
450
Thermal Conductivity, W/m-K 390
15
Thermal Expansion, µm/m-K 17
11

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 98
1.9
Electrical Conductivity: Equal Weight (Specific), % IACS 98
2.1

Otherwise Unclassified Properties

Density, g/cm3 9.0
8.4
Embodied Carbon, kg CO2/kg material 2.6
8.0
Embodied Energy, MJ/kg 41
110
Embodied Water, L/kg 310
520

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 10 to 91
57
Resilience: Unit (Modulus of Resilience), kJ/m3 25 to 690
570
Stiffness to Weight: Axial, points 7.2
15
Stiffness to Weight: Bending, points 18
24
Strength to Weight: Axial, points 7.2 to 13
23
Strength to Weight: Bending, points 9.4 to 14
21
Thermal Diffusivity, mm2/s 110
3.8
Thermal Shock Resistance, points 8.2 to 15
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), % 99.9 to 99.996
0
Iron (Fe), % 0
0 to 3.0
Molybdenum (Mo), % 0
4.5 to 6.0
Nickel (Ni), % 0
2.0 to 3.0
Phosphorus (P), % 0.0040 to 0.012
0
Silicon (Si), % 0
0 to 1.5