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C82700 Copper vs. R30012 Cobalt

C82700 copper belongs to the copper alloys classification, while R30012 cobalt belongs to the cobalt alloys. There are 27 material properties with values for both materials. Properties with values for just one material (3, in this case) are not shown.

For each property being compared, the top bar is C82700 copper and the bottom bar is R30012 cobalt.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 120
220
Elongation at Break, % 1.8
1.0
Poisson's Ratio 0.33
0.28
Rockwell C Hardness 39
48
Shear Modulus, GPa 46
86
Tensile Strength: Ultimate (UTS), MPa 1200
830
Tensile Strength: Yield (Proof), MPa 1020
650

Thermal Properties

Latent Heat of Fusion, J/g 240
320
Melting Completion (Liquidus), °C 950
1470
Melting Onset (Solidus), °C 860
1280
Specific Heat Capacity, J/kg-K 380
440
Thermal Conductivity, W/m-K 130
15
Thermal Expansion, µm/m-K 17
12

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 20
1.8
Electrical Conductivity: Equal Weight (Specific), % IACS 21
1.8

Otherwise Unclassified Properties

Density, g/cm3 8.7
8.8
Embodied Carbon, kg CO2/kg material 12
8.3
Embodied Energy, MJ/kg 180
120
Embodied Water, L/kg 310
480

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 21
7.7
Resilience: Unit (Modulus of Resilience), kJ/m3 4260
960
Stiffness to Weight: Axial, points 7.8
14
Stiffness to Weight: Bending, points 19
23
Strength to Weight: Axial, points 38
26
Strength to Weight: Bending, points 29
22
Thermal Diffusivity, mm2/s 39
3.8
Thermal Shock Resistance, points 41
23

Alloy Composition

Aluminum (Al), % 0 to 0.15
0
Beryllium (Be), % 2.4 to 2.6
0
Carbon (C), % 0
1.4 to 2.0
Chromium (Cr), % 0 to 0.090
27 to 32
Cobalt (Co), % 0
47.5 to 64.1
Copper (Cu), % 94.6 to 96.7
0
Iron (Fe), % 0 to 0.25
0 to 3.0
Lead (Pb), % 0 to 0.020
0
Molybdenum (Mo), % 0
0 to 1.0
Nickel (Ni), % 1.0 to 1.5
0 to 3.0
Silicon (Si), % 0 to 0.15
0 to 2.0
Tin (Sn), % 0 to 0.1
0
Tungsten (W), % 0
7.5 to 9.5
Zinc (Zn), % 0 to 0.1
0
Residuals, % 0 to 0.5
0