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R30006 Cobalt vs. C87700 Bronze

R30006 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 (6, in this case) are not shown.

For each property being compared, the top bar is R30006 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 85
42
Tensile Strength: Ultimate (UTS), MPa 900
300
Tensile Strength: Yield (Proof), MPa 540
120

Thermal Properties

Latent Heat of Fusion, J/g 320
250
Melting Completion (Liquidus), °C 1400
980
Melting Onset (Solidus), °C 1290
900
Specific Heat Capacity, J/kg-K 450
400
Thermal Conductivity, W/m-K 15
120
Thermal Expansion, µm/m-K 11
18

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 1.6
45
Electrical Conductivity: Equal Weight (Specific), % IACS 1.7
48

Otherwise Unclassified Properties

Density, g/cm3 8.6
8.5
Embodied Carbon, kg CO2/kg material 7.8
2.7
Embodied Energy, MJ/kg 110
45
Embodied Water, L/kg 500
310

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 7.8
8.6
Resilience: Unit (Modulus of Resilience), kJ/m3 670
64
Stiffness to Weight: Axial, points 14
7.4
Stiffness to Weight: Bending, points 23
19
Strength to Weight: Axial, points 29
9.8
Strength to Weight: Bending, points 24
12
Thermal Diffusivity, mm2/s 3.9
34
Thermal Shock Resistance, points 26
11

Alloy Composition


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Antimony (Sb), % 0
0 to 0.1
Carbon (C), % 0.9 to 1.4
0
Chromium (Cr), % 27 to 32
0
Cobalt (Co), % 48.6 to 68.1
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), % 4.0 to 6.0
0
Zinc (Zn), % 0
7.0 to 9.0
Residuals, % 0
0 to 0.8