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R30816 Cobalt vs. C96700 Copper

R30816 cobalt belongs to the cobalt alloys classification, while C96700 copper belongs to the copper alloys. They have a modest 21% of their average alloy composition in common, which, by itself, doesn't mean much. There are 24 material properties with values for both materials. Properties with values for just one material (6, in this case) are not shown.

For each property being compared, the top bar is R30816 cobalt and the bottom bar is C96700 copper.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 210
140
Elongation at Break, % 23
10
Poisson's Ratio 0.3
0.33
Shear Modulus, GPa 81
53
Tensile Strength: Ultimate (UTS), MPa 1020
1210
Tensile Strength: Yield (Proof), MPa 460
550

Thermal Properties

Latent Heat of Fusion, J/g 300
250
Melting Completion (Liquidus), °C 1540
1170
Melting Onset (Solidus), °C 1460
1110
Specific Heat Capacity, J/kg-K 420
400
Thermal Conductivity, W/m-K 13
30
Thermal Expansion, µm/m-K 12
15

Otherwise Unclassified Properties

Density, g/cm3 9.1
8.8
Embodied Carbon, kg CO2/kg material 20
9.5
Embodied Energy, MJ/kg 320
140
Embodied Water, L/kg 440
280

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 190
99
Resilience: Unit (Modulus of Resilience), kJ/m3 510
1080
Stiffness to Weight: Axial, points 13
8.9
Stiffness to Weight: Bending, points 22
20
Strength to Weight: Axial, points 31
38
Strength to Weight: Bending, points 25
29
Thermal Diffusivity, mm2/s 3.3
8.5
Thermal Shock Resistance, points 28
40

Alloy Composition

Beryllium (Be), % 0
1.1 to 1.2
Carbon (C), % 0.32 to 0.42
0
Chromium (Cr), % 19 to 21
0
Cobalt (Co), % 40 to 49.8
0
Copper (Cu), % 0
62.4 to 68.8
Iron (Fe), % 0 to 5.0
0.4 to 1.0
Lead (Pb), % 0
0 to 0.010
Manganese (Mn), % 1.0 to 2.0
0.4 to 1.0
Molybdenum (Mo), % 3.5 to 4.5
0
Nickel (Ni), % 19 to 21
29 to 33
Niobium (Nb), % 3.5 to 4.5
0
Phosphorus (P), % 0 to 0.040
0
Silicon (Si), % 0 to 1.0
0 to 0.15
Sulfur (S), % 0 to 0.030
0
Tantalum (Ta), % 3.5 to 4.5
0
Titanium (Ti), % 0
0.15 to 0.35
Tungsten (W), % 3.5 to 4.5
0
Zirconium (Zr), % 0
0.15 to 0.35
Residuals, % 0
0 to 0.5