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C70400 Copper-nickel vs. R30155 Cobalt

C70400 copper-nickel belongs to the copper alloys classification, while R30155 cobalt belongs to the iron alloys. There are 24 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 C70400 copper-nickel and the bottom bar is R30155 cobalt.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 120
210
Poisson's Ratio 0.34
0.29
Shear Modulus, GPa 45
81
Tensile Strength: Ultimate (UTS), MPa 300 to 310
850
Tensile Strength: Yield (Proof), MPa 95 to 230
390

Thermal Properties

Latent Heat of Fusion, J/g 210
300
Maximum Temperature: Mechanical, °C 210
1100
Melting Completion (Liquidus), °C 1120
1470
Melting Onset (Solidus), °C 1060
1420
Specific Heat Capacity, J/kg-K 390
450
Thermal Conductivity, W/m-K 64
12
Thermal Expansion, µm/m-K 17
14

Otherwise Unclassified Properties

Base Metal Price, % relative 32
80
Density, g/cm3 8.9
8.5
Embodied Carbon, kg CO2/kg material 3.0
9.7
Embodied Energy, MJ/kg 47
150
Embodied Water, L/kg 300
300

Common Calculations

Resilience: Unit (Modulus of Resilience), kJ/m3 38 to 220
370
Stiffness to Weight: Axial, points 7.5
14
Stiffness to Weight: Bending, points 19
23
Strength to Weight: Axial, points 9.3 to 9.8
28
Strength to Weight: Bending, points 11 to 12
24
Thermal Diffusivity, mm2/s 18
3.2
Thermal Shock Resistance, points 10 to 11
21

Alloy Composition

Carbon (C), % 0
0.080 to 0.16
Chromium (Cr), % 0
20 to 22.5
Cobalt (Co), % 0
18.5 to 21
Copper (Cu), % 89.8 to 93.6
0
Iron (Fe), % 1.3 to 1.7
24.3 to 36.2
Lead (Pb), % 0 to 0.050
0
Manganese (Mn), % 0.3 to 0.8
1.0 to 2.0
Molybdenum (Mo), % 0
2.5 to 3.5
Nickel (Ni), % 4.8 to 6.2
19 to 21
Niobium (Nb), % 0
0.75 to 1.3
Nitrogen (N), % 0
0 to 0.2
Phosphorus (P), % 0
0 to 0.040
Silicon (Si), % 0
0 to 1.0
Sulfur (S), % 0
0 to 0.030
Tantalum (Ta), % 0
0.75 to 1.3
Tungsten (W), % 0
2.0 to 3.0
Zinc (Zn), % 0 to 1.0
0
Residuals, % 0 to 0.5
0