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R30075 Cobalt vs. C71580 Copper-nickel

R30075 cobalt belongs to the cobalt alloys classification, while C71580 copper-nickel belongs to the copper alloys. There are 26 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 C71580 copper-nickel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 210 to 250
140
Elongation at Break, % 12
40
Poisson's Ratio 0.29
0.33
Shear Modulus, GPa 82 to 98
51
Tensile Strength: Ultimate (UTS), MPa 780 to 1280
330
Tensile Strength: Yield (Proof), MPa 480 to 840
110

Thermal Properties

Latent Heat of Fusion, J/g 320
230
Melting Completion (Liquidus), °C 1360
1180
Melting Onset (Solidus), °C 1290
1120
Specific Heat Capacity, J/kg-K 450
400
Thermal Conductivity, W/m-K 13
39
Thermal Expansion, µm/m-K 12
15

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.0
4.7
Electrical Conductivity: Equal Weight (Specific), % IACS 2.1
4.7

Otherwise Unclassified Properties

Density, g/cm3 8.4
8.9
Embodied Carbon, kg CO2/kg material 8.1
5.1
Embodied Energy, MJ/kg 110
74
Embodied Water, L/kg 530
280

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 84 to 140
100
Resilience: Unit (Modulus of Resilience), kJ/m3 560 to 1410
47
Stiffness to Weight: Axial, points 14 to 17
8.5
Stiffness to Weight: Bending, points 24 to 25
19
Strength to Weight: Axial, points 26 to 42
10
Strength to Weight: Bending, points 22 to 31
12
Thermal Diffusivity, mm2/s 3.5
11
Thermal Shock Resistance, points 21 to 29
11

Alloy Composition

Aluminum (Al), % 0 to 0.1
0
Boron (B), % 0 to 0.010
0
Carbon (C), % 0 to 0.35
0 to 0.070
Chromium (Cr), % 27 to 30
0
Cobalt (Co), % 58.7 to 68
0
Copper (Cu), % 0
65.5 to 71
Iron (Fe), % 0 to 0.75
0 to 0.5
Lead (Pb), % 0
0 to 0.050
Manganese (Mn), % 0 to 1.0
0 to 0.3
Molybdenum (Mo), % 5.0 to 7.0
0
Nickel (Ni), % 0 to 0.5
29 to 33
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 0.050
Residuals, % 0
0 to 0.5