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R30075 Cobalt vs. C70400 Copper-nickel

R30075 cobalt belongs to the cobalt alloys classification, while C70400 copper-nickel belongs to the copper alloys. There are 24 material properties with values for both materials. Properties with values for just one material (6, in this case) are not shown.

For each property being compared, the top bar is R30075 cobalt and the bottom bar is C70400 copper-nickel.

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
45
Tensile Strength: Ultimate (UTS), MPa 780 to 1280
300 to 310
Tensile Strength: Yield (Proof), MPa 480 to 840
95 to 230

Thermal Properties

Latent Heat of Fusion, J/g 320
210
Melting Completion (Liquidus), °C 1360
1120
Melting Onset (Solidus), °C 1290
1060
Specific Heat Capacity, J/kg-K 450
390
Thermal Conductivity, W/m-K 13
64
Thermal Expansion, µm/m-K 12
17

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.0
14
Electrical Conductivity: Equal Weight (Specific), % IACS 2.1
14

Otherwise Unclassified Properties

Density, g/cm3 8.4
8.9
Embodied Carbon, kg CO2/kg material 8.1
3.0
Embodied Energy, MJ/kg 110
47
Embodied Water, L/kg 530
300

Common Calculations

Resilience: Unit (Modulus of Resilience), kJ/m3 560 to 1410
38 to 220
Stiffness to Weight: Axial, points 14 to 17
7.5
Stiffness to Weight: Bending, points 24 to 25
19
Strength to Weight: Axial, points 26 to 42
9.3 to 9.8
Strength to Weight: Bending, points 22 to 31
11 to 12
Thermal Diffusivity, mm2/s 3.5
18
Thermal Shock Resistance, points 21 to 29
10 to 11

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
89.8 to 93.6
Iron (Fe), % 0 to 0.75
1.3 to 1.7
Lead (Pb), % 0
0 to 0.050
Manganese (Mn), % 0 to 1.0
0.3 to 0.8
Molybdenum (Mo), % 5.0 to 7.0
0
Nickel (Ni), % 0 to 0.5
4.8 to 6.2
Nitrogen (N), % 0 to 0.25
0
Phosphorus (P), % 0 to 0.020
0
Silicon (Si), % 0 to 1.0
0
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