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R30075 Cobalt vs. C71500 Copper-nickel

R30075 cobalt belongs to the cobalt alloys classification, while C71500 copper-nickel belongs to the copper alloys. There are 22 material properties with values for both materials. Properties with values for just one material (10, in this case) are not shown.

For each property being compared, the top bar is R30075 cobalt and the bottom bar is C71500 copper-nickel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 210 to 250
140
Poisson's Ratio 0.29
0.33
Shear Modulus, GPa 82 to 98
52
Tensile Strength: Ultimate (UTS), MPa 780 to 1280
380 to 620

Thermal Properties

Latent Heat of Fusion, J/g 320
230
Melting Completion (Liquidus), °C 1360
1240
Melting Onset (Solidus), °C 1290
1170
Specific Heat Capacity, J/kg-K 450
400
Thermal Conductivity, W/m-K 13
28
Thermal Expansion, µm/m-K 12
16

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.0
4.6
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

Stiffness to Weight: Axial, points 14 to 17
8.6
Stiffness to Weight: Bending, points 24 to 25
19
Strength to Weight: Axial, points 26 to 42
12 to 19
Strength to Weight: Bending, points 22 to 31
13 to 18
Thermal Diffusivity, mm2/s 3.5
7.7
Thermal Shock Resistance, points 21 to 29
12 to 20

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
63.5 to 70.6
Iron (Fe), % 0 to 0.75
0.4 to 1.0
Lead (Pb), % 0
0 to 0.050
Manganese (Mn), % 0 to 1.0
0 to 1.0
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 1.0
Residuals, % 0
0 to 0.5