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R30155 Cobalt vs. C96400 Copper-nickel

R30155 cobalt belongs to the iron alloys classification, while C96400 copper-nickel belongs to the copper alloys. They have a modest 23% of their average alloy composition in common, which, by itself, doesn't mean much. There are 26 material properties with values for both materials. Properties with values for just one material (8, in this case) are not shown.

For each property being compared, the top bar is R30155 cobalt and the bottom bar is C96400 copper-nickel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 210
140
Elongation at Break, % 34
25
Poisson's Ratio 0.29
0.33
Shear Modulus, GPa 81
51
Tensile Strength: Ultimate (UTS), MPa 850
490
Tensile Strength: Yield (Proof), MPa 390
260

Thermal Properties

Latent Heat of Fusion, J/g 300
240
Maximum Temperature: Mechanical, °C 1100
260
Melting Completion (Liquidus), °C 1470
1240
Melting Onset (Solidus), °C 1420
1170
Specific Heat Capacity, J/kg-K 450
400
Thermal Conductivity, W/m-K 12
28
Thermal Expansion, µm/m-K 14
15

Otherwise Unclassified Properties

Base Metal Price, % relative 80
45
Density, g/cm3 8.5
8.9
Embodied Carbon, kg CO2/kg material 9.7
5.9
Embodied Energy, MJ/kg 150
87
Embodied Water, L/kg 300
280

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 230
100
Resilience: Unit (Modulus of Resilience), kJ/m3 370
250
Stiffness to Weight: Axial, points 14
8.6
Stiffness to Weight: Bending, points 23
19
Strength to Weight: Axial, points 28
15
Strength to Weight: Bending, points 24
16
Thermal Diffusivity, mm2/s 3.2
7.8
Thermal Shock Resistance, points 21
17

Alloy Composition

Carbon (C), % 0.080 to 0.16
0 to 0.15
Chromium (Cr), % 20 to 22.5
0
Cobalt (Co), % 18.5 to 21
0
Copper (Cu), % 0
62.3 to 71.3
Iron (Fe), % 24.3 to 36.2
0.25 to 1.5
Lead (Pb), % 0
0 to 0.010
Manganese (Mn), % 1.0 to 2.0
0 to 1.5
Molybdenum (Mo), % 2.5 to 3.5
0
Nickel (Ni), % 19 to 21
28 to 32
Niobium (Nb), % 0.75 to 1.3
0.5 to 1.5
Nitrogen (N), % 0 to 0.2
0
Phosphorus (P), % 0 to 0.040
0 to 0.020
Silicon (Si), % 0 to 1.0
0 to 0.5
Sulfur (S), % 0 to 0.030
0 to 0.020
Tantalum (Ta), % 0.75 to 1.3
0
Tungsten (W), % 2.0 to 3.0
0
Residuals, % 0
0 to 0.5