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CR025A Copper vs. R30605 Cobalt

CR025A copper belongs to the copper alloys classification, while R30605 cobalt belongs to the cobalt alloys. There are 24 material properties with values for both materials. Properties with values for just one material (5, in this case) are not shown.

For each property being compared, the top bar is CR025A copper and the bottom bar is R30605 cobalt.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 120
210
Elongation at Break, % 15
34
Poisson's Ratio 0.34
0.29
Shear Modulus, GPa 43
81
Tensile Strength: Ultimate (UTS), MPa 230
1130 to 1900
Tensile Strength: Yield (Proof), MPa 140
470 to 1600

Thermal Properties

Latent Heat of Fusion, J/g 210
290
Melting Completion (Liquidus), °C 1090
1410
Melting Onset (Solidus), °C 1040
1330
Specific Heat Capacity, J/kg-K 390
410
Thermal Conductivity, W/m-K 370
9.6
Thermal Expansion, µm/m-K 17
12

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 99
2.0
Electrical Conductivity: Equal Weight (Specific), % IACS 99
1.8

Otherwise Unclassified Properties

Density, g/cm3 9.0
9.6
Embodied Carbon, kg CO2/kg material 2.6
9.8
Embodied Energy, MJ/kg 41
140
Embodied Water, L/kg 320
450

Common Calculations

Stiffness to Weight: Axial, points 7.2
12
Stiffness to Weight: Bending, points 18
21
Strength to Weight: Axial, points 7.1
33 to 55
Strength to Weight: Bending, points 9.3
25 to 36
Thermal Diffusivity, mm2/s 110
2.5
Thermal Shock Resistance, points 8.1
31 to 52

Alloy Composition

Bismuth (Bi), % 0 to 0.00050
0
Carbon (C), % 0
0.050 to 0.15
Chromium (Cr), % 0
19 to 21
Cobalt (Co), % 0
46.4 to 57
Copper (Cu), % 99.9 to 99.96
0
Iron (Fe), % 0
0 to 3.0
Lead (Pb), % 0 to 0.0050
0
Manganese (Mn), % 0
1.0 to 2.0
Nickel (Ni), % 0
9.0 to 11
Phosphorus (P), % 0.040 to 0.060
0 to 0.040
Silicon (Si), % 0
0 to 0.4
Silver (Ag), % 0 to 0.015
0
Sulfur (S), % 0
0 to 0.030
Tungsten (W), % 0
14 to 16