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R30012 Cobalt vs. C82700 Copper

R30012 cobalt belongs to the cobalt alloys classification, while C82700 copper belongs to the copper 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 R30012 cobalt and the bottom bar is C82700 copper.

Metric UnitsUS Customary Units

Mechanical Properties

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

Thermal Properties

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

Electrical Properties

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

Otherwise Unclassified Properties

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

Common Calculations

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

Alloy Composition

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