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C95520 Bronze vs. R30021 Cobalt

C95520 bronze belongs to the copper alloys classification, while R30021 cobalt belongs to the cobalt 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 C95520 bronze and the bottom bar is R30021 cobalt.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 120
220
Elongation at Break, % 2.6
9.0
Poisson's Ratio 0.33
0.29
Shear Modulus, GPa 44
86
Tensile Strength: Ultimate (UTS), MPa 970
700
Tensile Strength: Yield (Proof), MPa 530
500

Thermal Properties

Latent Heat of Fusion, J/g 240
330
Melting Completion (Liquidus), °C 1070
1350
Melting Onset (Solidus), °C 1020
1190
Specific Heat Capacity, J/kg-K 450
450
Thermal Conductivity, W/m-K 40
15
Thermal Expansion, µm/m-K 18
11

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 11
1.9
Electrical Conductivity: Equal Weight (Specific), % IACS 12
2.1

Otherwise Unclassified Properties

Density, g/cm3 8.2
8.4
Embodied Carbon, kg CO2/kg material 3.6
8.0
Embodied Energy, MJ/kg 58
110
Embodied Water, L/kg 390
520

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 21
57
Resilience: Unit (Modulus of Resilience), kJ/m3 1210
570
Stiffness to Weight: Axial, points 8.0
15
Stiffness to Weight: Bending, points 20
24
Strength to Weight: Axial, points 33
23
Strength to Weight: Bending, points 27
21
Thermal Diffusivity, mm2/s 11
3.8
Thermal Shock Resistance, points 33
21

Alloy Composition

Aluminum (Al), % 10.5 to 11.5
0
Carbon (C), % 0
0.2 to 0.35
Chromium (Cr), % 0 to 0.050
26 to 29
Cobalt (Co), % 0 to 0.2
61.7 to 67.3
Copper (Cu), % 74.5 to 81.3
0
Iron (Fe), % 4.0 to 5.5
0 to 3.0
Lead (Pb), % 0 to 0.030
0
Manganese (Mn), % 0 to 1.5
0
Molybdenum (Mo), % 0
4.5 to 6.0
Nickel (Ni), % 4.2 to 6.0
2.0 to 3.0
Silicon (Si), % 0 to 0.15
0 to 1.5
Tin (Sn), % 0 to 0.25
0
Zinc (Zn), % 0 to 0.3
0
Residuals, % 0 to 0.5
0