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R30075 Cobalt vs. C70250 Copper

R30075 cobalt belongs to the cobalt alloys classification, while C70250 copper belongs to the copper alloys. There are 22 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 R30075 cobalt and the bottom bar is C70250 copper.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 210 to 250
120
Poisson's Ratio 0.29
0.34
Shear Modulus, GPa 82 to 98
44
Tensile Strength: Ultimate (UTS), MPa 780 to 1280
520 to 740

Thermal Properties

Latent Heat of Fusion, J/g 320
220
Melting Completion (Liquidus), °C 1360
1100
Melting Onset (Solidus), °C 1290
1080
Specific Heat Capacity, J/kg-K 450
390
Thermal Conductivity, W/m-K 13
170
Thermal Expansion, µm/m-K 12
17

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.0
36 to 50
Electrical Conductivity: Equal Weight (Specific), % IACS 2.1
37 to 51

Otherwise Unclassified Properties

Density, g/cm3 8.4
8.9
Embodied Carbon, kg CO2/kg material 8.1
2.9
Embodied Energy, MJ/kg 110
45
Embodied Water, L/kg 530
310

Common Calculations

Stiffness to Weight: Axial, points 14 to 17
7.4
Stiffness to Weight: Bending, points 24 to 25
18
Strength to Weight: Axial, points 26 to 42
16 to 23
Strength to Weight: Bending, points 22 to 31
16 to 21
Thermal Diffusivity, mm2/s 3.5
49
Thermal Shock Resistance, points 21 to 29
18 to 26

Alloy Composition

Aluminum (Al), % 0 to 0.1
0
Boron (B), % 0 to 0.010
0
Carbon (C), % 0 to 0.35
0
Chromium (Cr), % 27 to 30
0
Cobalt (Co), % 58.7 to 68
0
Copper (Cu), % 0
92.7 to 97.5
Iron (Fe), % 0 to 0.75
0
Lead (Pb), % 0
0 to 0.050
Magnesium (Mg), % 0
0.050 to 0.3
Manganese (Mn), % 0 to 1.0
0 to 0.1
Molybdenum (Mo), % 5.0 to 7.0
0
Nickel (Ni), % 0 to 0.5
2.2 to 4.2
Nitrogen (N), % 0 to 0.25
0
Phosphorus (P), % 0 to 0.020
0
Silicon (Si), % 0 to 1.0
0.25 to 1.2
Sulfur (S), % 0 to 0.010
0
Titanium (Ti), % 0 to 0.1
0
Tungsten (W), % 0 to 0.2
0
Zinc (Zn), % 0
0 to 1.0
Residuals, % 0
0 to 0.5