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R31538 Cobalt vs. C61900 Bronze

R31538 cobalt belongs to the cobalt alloys classification, while C61900 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 C61900 bronze.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 220
110
Elongation at Break, % 13 to 23
21 to 32
Poisson's Ratio 0.29
0.34
Shear Modulus, GPa 86
43
Tensile Strength: Ultimate (UTS), MPa 1020 to 1360
570 to 650
Tensile Strength: Yield (Proof), MPa 580 to 930
230 to 310

Thermal Properties

Latent Heat of Fusion, J/g 320
230
Melting Completion (Liquidus), °C 1360
1050
Melting Onset (Solidus), °C 1290
1040
Specific Heat Capacity, J/kg-K 450
440
Thermal Conductivity, W/m-K 13
79
Thermal Expansion, µm/m-K 13
18

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.0
11
Electrical Conductivity: Equal Weight (Specific), % IACS 2.1
11

Otherwise Unclassified Properties

Density, g/cm3 8.4
8.3
Embodied Carbon, kg CO2/kg material 8.1
3.1
Embodied Energy, MJ/kg 110
51
Embodied Water, L/kg 530
380

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 140 to 200
110 to 150
Resilience: Unit (Modulus of Resilience), kJ/m3 750 to 1920
230 to 430
Stiffness to Weight: Axial, points 15
7.6
Stiffness to Weight: Bending, points 24
19
Strength to Weight: Axial, points 34 to 45
19 to 22
Strength to Weight: Bending, points 27 to 32
18 to 20
Thermal Diffusivity, mm2/s 3.5
22
Thermal Shock Resistance, points 25 to 33
20 to 23

Alloy Composition


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Aluminum (Al), % 0
8.5 to 10
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
83.6 to 88.5
Iron (Fe), % 0 to 0.75
3.0 to 4.5
Lead (Pb), % 0
0 to 0.020
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 to 0.6
Zinc (Zn), % 0
0 to 0.8
Residuals, % 0
0 to 0.5