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CR023A Copper vs. R30816 Cobalt

CR023A copper belongs to the copper alloys classification, while R30816 cobalt belongs to the cobalt 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 CR023A copper and the bottom bar is R30816 cobalt.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 120
210
Elongation at Break, % 15
23
Poisson's Ratio 0.34
0.3
Shear Modulus, GPa 43
81
Tensile Strength: Ultimate (UTS), MPa 220
1020
Tensile Strength: Yield (Proof), MPa 130
460

Thermal Properties

Latent Heat of Fusion, J/g 210
300
Melting Completion (Liquidus), °C 1090
1540
Melting Onset (Solidus), °C 1040
1460
Specific Heat Capacity, J/kg-K 390
420
Thermal Conductivity, W/m-K 380
13
Thermal Expansion, µm/m-K 17
12

Otherwise Unclassified Properties

Density, g/cm3 9.0
9.1
Embodied Carbon, kg CO2/kg material 2.6
20
Embodied Energy, MJ/kg 41
320
Embodied Water, L/kg 320
440

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 29
190
Resilience: Unit (Modulus of Resilience), kJ/m3 76
510
Stiffness to Weight: Axial, points 7.2
13
Stiffness to Weight: Bending, points 18
22
Strength to Weight: Axial, points 6.8
31
Strength to Weight: Bending, points 9.0
25
Thermal Diffusivity, mm2/s 110
3.3
Thermal Shock Resistance, points 7.8
28

Alloy Composition

Bismuth (Bi), % 0 to 0.00050
0
Carbon (C), % 0
0.32 to 0.42
Chromium (Cr), % 0
19 to 21
Cobalt (Co), % 0
40 to 49.8
Copper (Cu), % 99.9 to 99.995
0
Iron (Fe), % 0
0 to 5.0
Lead (Pb), % 0 to 0.0050
0
Manganese (Mn), % 0
1.0 to 2.0
Molybdenum (Mo), % 0
3.5 to 4.5
Nickel (Ni), % 0
19 to 21
Niobium (Nb), % 0
3.5 to 4.5
Phosphorus (P), % 0.0050 to 0.013
0 to 0.040
Silicon (Si), % 0
0 to 1.0
Silver (Ag), % 0 to 0.015
0
Sulfur (S), % 0
0 to 0.030
Tantalum (Ta), % 0
3.5 to 4.5
Tungsten (W), % 0
3.5 to 4.5