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C81400 Copper vs. R30155 Cobalt

C81400 copper belongs to the copper alloys classification, while R30155 cobalt belongs to the iron alloys. There are 26 material properties with values for both materials. Properties with values for just one material (9, in this case) are not shown.

For each property being compared, the top bar is C81400 copper and the bottom bar is R30155 cobalt.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 120
210
Elongation at Break, % 11
34
Poisson's Ratio 0.34
0.29
Shear Modulus, GPa 41
81
Tensile Strength: Ultimate (UTS), MPa 370
850
Tensile Strength: Yield (Proof), MPa 250
390

Thermal Properties

Latent Heat of Fusion, J/g 210
300
Maximum Temperature: Mechanical, °C 200
1100
Melting Completion (Liquidus), °C 1090
1470
Melting Onset (Solidus), °C 1070
1420
Specific Heat Capacity, J/kg-K 390
450
Thermal Conductivity, W/m-K 260
12
Thermal Expansion, µm/m-K 17
14

Otherwise Unclassified Properties

Base Metal Price, % relative 33
80
Density, g/cm3 8.9
8.5
Embodied Carbon, kg CO2/kg material 2.8
9.7
Embodied Energy, MJ/kg 45
150
Embodied Water, L/kg 310
300

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 36
230
Resilience: Unit (Modulus of Resilience), kJ/m3 260
370
Stiffness to Weight: Axial, points 7.3
14
Stiffness to Weight: Bending, points 18
23
Strength to Weight: Axial, points 11
28
Strength to Weight: Bending, points 13
24
Thermal Diffusivity, mm2/s 75
3.2
Thermal Shock Resistance, points 13
21

Alloy Composition

Beryllium (Be), % 0.020 to 0.1
0
Carbon (C), % 0
0.080 to 0.16
Chromium (Cr), % 0.6 to 1.0
20 to 22.5
Cobalt (Co), % 0
18.5 to 21
Copper (Cu), % 98.4 to 99.38
0
Iron (Fe), % 0
24.3 to 36.2
Manganese (Mn), % 0
1.0 to 2.0
Molybdenum (Mo), % 0
2.5 to 3.5
Nickel (Ni), % 0
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
Residuals, % 0 to 0.5
0