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C92800 Bronze vs. R30021 Cobalt

C92800 bronze belongs to the copper alloys classification, while R30021 cobalt belongs to the cobalt alloys. There are 24 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 C92800 bronze and the bottom bar is R30021 cobalt.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 100
220
Elongation at Break, % 1.0
9.0
Poisson's Ratio 0.35
0.29
Shear Modulus, GPa 37
86
Tensile Strength: Ultimate (UTS), MPa 280
700
Tensile Strength: Yield (Proof), MPa 210
500

Thermal Properties

Latent Heat of Fusion, J/g 170
330
Melting Completion (Liquidus), °C 960
1350
Melting Onset (Solidus), °C 820
1190
Specific Heat Capacity, J/kg-K 350
450
Thermal Expansion, µm/m-K 18
11

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 9.0
1.9
Electrical Conductivity: Equal Weight (Specific), % IACS 9.3
2.1

Otherwise Unclassified Properties

Density, g/cm3 8.7
8.4
Embodied Carbon, kg CO2/kg material 4.1
8.0
Embodied Energy, MJ/kg 67
110
Embodied Water, L/kg 430
520

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 2.5
57
Resilience: Unit (Modulus of Resilience), kJ/m3 210
570
Stiffness to Weight: Axial, points 6.4
15
Stiffness to Weight: Bending, points 18
24
Strength to Weight: Axial, points 8.8
23
Strength to Weight: Bending, points 11
21
Thermal Shock Resistance, points 11
21

Alloy Composition

Aluminum (Al), % 0 to 0.0050
0
Antimony (Sb), % 0 to 0.25
0
Carbon (C), % 0
0.2 to 0.35
Chromium (Cr), % 0
26 to 29
Cobalt (Co), % 0
61.7 to 67.3
Copper (Cu), % 78 to 82
0
Iron (Fe), % 0 to 0.2
0 to 3.0
Lead (Pb), % 4.0 to 6.0
0
Molybdenum (Mo), % 0
4.5 to 6.0
Nickel (Ni), % 0 to 0.8
2.0 to 3.0
Phosphorus (P), % 0 to 1.5
0
Silicon (Si), % 0 to 0.0050
0 to 1.5
Sulfur (S), % 0 to 0.050
0
Tin (Sn), % 15 to 17
0
Zinc (Zn), % 0 to 0.8
0
Residuals, % 0 to 0.7
0