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R30012 Cobalt vs. C87700 Bronze

R30012 cobalt belongs to the cobalt alloys classification, while C87700 bronze belongs to the copper alloys. There are 26 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 R30012 cobalt and the bottom bar is C87700 bronze.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 220
110
Elongation at Break, % 1.0
3.6
Poisson's Ratio 0.28
0.33
Shear Modulus, GPa 86
42
Tensile Strength: Ultimate (UTS), MPa 830
300
Tensile Strength: Yield (Proof), MPa 650
120

Thermal Properties

Latent Heat of Fusion, J/g 320
250
Melting Completion (Liquidus), °C 1470
980
Melting Onset (Solidus), °C 1280
900
Specific Heat Capacity, J/kg-K 440
400
Thermal Conductivity, W/m-K 15
120
Thermal Expansion, µm/m-K 12
18

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 1.8
45
Electrical Conductivity: Equal Weight (Specific), % IACS 1.8
48

Otherwise Unclassified Properties

Density, g/cm3 8.8
8.5
Embodied Carbon, kg CO2/kg material 8.3
2.7
Embodied Energy, MJ/kg 120
45
Embodied Water, L/kg 480
310

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 7.7
8.6
Resilience: Unit (Modulus of Resilience), kJ/m3 960
64
Stiffness to Weight: Axial, points 14
7.4
Stiffness to Weight: Bending, points 23
19
Strength to Weight: Axial, points 26
9.8
Strength to Weight: Bending, points 22
12
Thermal Diffusivity, mm2/s 3.8
34
Thermal Shock Resistance, points 23
11

Alloy Composition

Antimony (Sb), % 0
0 to 0.1
Carbon (C), % 1.4 to 2.0
0
Chromium (Cr), % 27 to 32
0
Cobalt (Co), % 47.5 to 64.1
0
Copper (Cu), % 0
87.5 to 90.5
Iron (Fe), % 0 to 3.0
0 to 0.5
Lead (Pb), % 0
0 to 0.090
Manganese (Mn), % 0
0 to 0.8
Molybdenum (Mo), % 0 to 1.0
0
Nickel (Ni), % 0 to 3.0
0 to 0.25
Phosphorus (P), % 0
0 to 0.15
Silicon (Si), % 0 to 2.0
2.5 to 3.5
Tin (Sn), % 0
0 to 2.0
Tungsten (W), % 7.5 to 9.5
0
Zinc (Zn), % 0
7.0 to 9.0
Residuals, % 0
0 to 0.8