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R31538 Cobalt vs. C40500 Penny Bronze

R31538 cobalt belongs to the cobalt alloys classification, while C40500 penny bronze belongs to the copper alloys. There are 26 material properties with values for both materials. Properties with values for just one material (8, in this case) are not shown.

For each property being compared, the top bar is R31538 cobalt and the bottom bar is C40500 penny bronze.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 220
110
Elongation at Break, % 13 to 23
3.0 to 49
Poisson's Ratio 0.29
0.34
Shear Modulus, GPa 86
43
Tensile Strength: Ultimate (UTS), MPa 1020 to 1360
270 to 540
Tensile Strength: Yield (Proof), MPa 580 to 930
79 to 520

Thermal Properties

Latent Heat of Fusion, J/g 320
200
Melting Completion (Liquidus), °C 1360
1060
Melting Onset (Solidus), °C 1290
1020
Specific Heat Capacity, J/kg-K 450
380
Thermal Conductivity, W/m-K 13
160
Thermal Expansion, µm/m-K 13
18

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.0
41
Electrical Conductivity: Equal Weight (Specific), % IACS 2.1
42

Otherwise Unclassified Properties

Density, g/cm3 8.4
8.8
Embodied Carbon, kg CO2/kg material 8.1
2.7
Embodied Energy, MJ/kg 110
43
Embodied Water, L/kg 530
320

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 140 to 200
16 to 110
Resilience: Unit (Modulus of Resilience), kJ/m3 750 to 1920
28 to 1200
Stiffness to Weight: Axial, points 15
7.2
Stiffness to Weight: Bending, points 24
18
Strength to Weight: Axial, points 34 to 45
8.5 to 17
Strength to Weight: Bending, points 27 to 32
10 to 17
Thermal Diffusivity, mm2/s 3.5
48
Thermal Shock Resistance, points 25 to 33
9.5 to 19

Alloy Composition


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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
94 to 96
Iron (Fe), % 0 to 0.75
0 to 0.050
Lead (Pb), % 0
0 to 0.050
Manganese (Mn), % 0 to 1.0
0
Molybdenum (Mo), % 5.0 to 7.0
0
Nickel (Ni), % 0 to 1.0
0
Nitrogen (N), % 0 to 0.25
0
Silicon (Si), % 0 to 1.0
0
Tin (Sn), % 0
0.7 to 1.3
Zinc (Zn), % 0
2.1 to 5.3
Residuals, % 0
0 to 0.5