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R31538 Cobalt vs. C61400 Bronze

R31538 cobalt belongs to the cobalt alloys classification, while C61400 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 R31538 cobalt and the bottom bar is C61400 bronze.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 220
110
Elongation at Break, % 13 to 23
34 to 40
Poisson's Ratio 0.29
0.34
Shear Modulus, GPa 86
43
Tensile Strength: Ultimate (UTS), MPa 1020 to 1360
540 to 570
Tensile Strength: Yield (Proof), MPa 580 to 930
220 to 270

Thermal Properties

Latent Heat of Fusion, J/g 320
220
Melting Completion (Liquidus), °C 1360
1050
Melting Onset (Solidus), °C 1290
1040
Specific Heat Capacity, J/kg-K 450
420
Thermal Conductivity, W/m-K 13
67
Thermal Expansion, µm/m-K 13
18

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.0
14
Electrical Conductivity: Equal Weight (Specific), % IACS 2.1
15

Otherwise Unclassified Properties

Density, g/cm3 8.4
8.5
Embodied Carbon, kg CO2/kg material 8.1
3.0
Embodied Energy, MJ/kg 110
48
Embodied Water, L/kg 530
360

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 140 to 200
160 to 170
Resilience: Unit (Modulus of Resilience), kJ/m3 750 to 1920
210 to 310
Stiffness to Weight: Axial, points 15
7.5
Stiffness to Weight: Bending, points 24
19
Strength to Weight: Axial, points 34 to 45
18 to 19
Strength to Weight: Bending, points 27 to 32
17 to 18
Thermal Diffusivity, mm2/s 3.5
19
Thermal Shock Resistance, points 25 to 33
18 to 20

Alloy Composition


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Aluminum (Al), % 0
6.0 to 8.0
Carbon (C), % 0.15 to 0.35
0
Chromium (Cr), % 26 to 30
0
Cobalt (Co), % 58.7 to 68.9
0
Copper (Cu), % 0
86 to 92.5
Iron (Fe), % 0 to 0.75
1.5 to 3.5
Lead (Pb), % 0
0 to 0.010
Manganese (Mn), % 0 to 1.0
0 to 1.0
Molybdenum (Mo), % 5.0 to 7.0
0
Nickel (Ni), % 0 to 1.0
0
Nitrogen (N), % 0 to 0.25
0
Phosphorus (P), % 0
0 to 0.015
Silicon (Si), % 0 to 1.0
0
Zinc (Zn), % 0
0 to 1.0
Residuals, % 0
0 to 0.5