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R30605 Cobalt vs. C71520 Copper-nickel

R30605 cobalt belongs to the cobalt alloys classification, while C71520 copper-nickel belongs to the copper alloys. There are 24 material properties with values for both materials. Properties with values for just one material (7, in this case) are not shown.

For each property being compared, the top bar is R30605 cobalt and the bottom bar is C71520 copper-nickel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 210
140
Elongation at Break, % 34
10 to 45
Poisson's Ratio 0.29
0.33
Shear Modulus, GPa 81
51
Tensile Strength: Ultimate (UTS), MPa 1130 to 1900
370 to 570
Tensile Strength: Yield (Proof), MPa 470 to 1600
140 to 430

Thermal Properties

Latent Heat of Fusion, J/g 290
230
Melting Completion (Liquidus), °C 1410
1170
Melting Onset (Solidus), °C 1330
1120
Specific Heat Capacity, J/kg-K 410
400
Thermal Conductivity, W/m-K 9.6
32
Thermal Expansion, µm/m-K 12
15

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.0
5.7
Electrical Conductivity: Equal Weight (Specific), % IACS 1.8
5.8

Otherwise Unclassified Properties

Density, g/cm3 9.6
8.9
Embodied Carbon, kg CO2/kg material 9.8
5.0
Embodied Energy, MJ/kg 140
73
Embodied Water, L/kg 450
280

Common Calculations

Stiffness to Weight: Axial, points 12
8.6
Stiffness to Weight: Bending, points 21
19
Strength to Weight: Axial, points 33 to 55
12 to 18
Strength to Weight: Bending, points 25 to 36
13 to 17
Thermal Diffusivity, mm2/s 2.5
8.9
Thermal Shock Resistance, points 31 to 52
12 to 19

Alloy Composition


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Carbon (C), % 0.050 to 0.15
0 to 0.050
Chromium (Cr), % 19 to 21
0
Cobalt (Co), % 46.4 to 57
0
Copper (Cu), % 0
65 to 71.6
Iron (Fe), % 0 to 3.0
0.4 to 1.0
Lead (Pb), % 0
0 to 0.020
Manganese (Mn), % 1.0 to 2.0
0 to 1.0
Nickel (Ni), % 9.0 to 11
28 to 33
Phosphorus (P), % 0 to 0.040
0 to 0.2
Silicon (Si), % 0 to 0.4
0
Sulfur (S), % 0 to 0.030
0 to 0.020
Tungsten (W), % 14 to 16
0
Zinc (Zn), % 0
0 to 0.5
Residuals, % 0
0 to 0.5