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R30816 Cobalt vs. C95700 Bronze

R30816 cobalt belongs to the cobalt alloys classification, while C95700 bronze belongs to the copper 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 R30816 cobalt and the bottom bar is C95700 bronze.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 210
130
Elongation at Break, % 23
23
Poisson's Ratio 0.3
0.34
Shear Modulus, GPa 81
47
Tensile Strength: Ultimate (UTS), MPa 1020
680
Tensile Strength: Yield (Proof), MPa 460
310

Thermal Properties

Latent Heat of Fusion, J/g 300
230
Melting Completion (Liquidus), °C 1540
990
Melting Onset (Solidus), °C 1460
950
Specific Heat Capacity, J/kg-K 420
440
Thermal Conductivity, W/m-K 13
12
Thermal Expansion, µm/m-K 12
18

Otherwise Unclassified Properties

Density, g/cm3 9.1
8.2
Embodied Carbon, kg CO2/kg material 20
3.3
Embodied Energy, MJ/kg 320
54
Embodied Water, L/kg 440
360

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 190
130
Resilience: Unit (Modulus of Resilience), kJ/m3 510
390
Stiffness to Weight: Axial, points 13
8.5
Stiffness to Weight: Bending, points 22
20
Strength to Weight: Axial, points 31
23
Strength to Weight: Bending, points 25
21
Thermal Diffusivity, mm2/s 3.3
3.3
Thermal Shock Resistance, points 28
21

Alloy Composition

Aluminum (Al), % 0
7.0 to 8.5
Carbon (C), % 0.32 to 0.42
0
Chromium (Cr), % 19 to 21
0
Cobalt (Co), % 40 to 49.8
0
Copper (Cu), % 0
71 to 78.5
Iron (Fe), % 0 to 5.0
2.0 to 4.0
Lead (Pb), % 0
0 to 0.030
Manganese (Mn), % 1.0 to 2.0
11 to 14
Molybdenum (Mo), % 3.5 to 4.5
0
Nickel (Ni), % 19 to 21
1.5 to 3.0
Niobium (Nb), % 3.5 to 4.5
0
Phosphorus (P), % 0 to 0.040
0
Silicon (Si), % 0 to 1.0
0 to 0.1
Sulfur (S), % 0 to 0.030
0
Tantalum (Ta), % 3.5 to 4.5
0
Tungsten (W), % 3.5 to 4.5
0
Residuals, % 0
0 to 0.5