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C91000 Bronze vs. R30816 Cobalt

C91000 bronze belongs to the copper alloys classification, while R30816 cobalt belongs to the cobalt alloys. There are 25 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 C91000 bronze and the bottom bar is R30816 cobalt.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 180
280
Elastic (Young's, Tensile) Modulus, GPa 110
210
Elongation at Break, % 7.0
23
Poisson's Ratio 0.34
0.3
Shear Modulus, GPa 39
81
Tensile Strength: Ultimate (UTS), MPa 230
1020
Tensile Strength: Yield (Proof), MPa 150
460

Thermal Properties

Latent Heat of Fusion, J/g 180
300
Melting Completion (Liquidus), °C 960
1540
Melting Onset (Solidus), °C 820
1460
Specific Heat Capacity, J/kg-K 360
420
Thermal Conductivity, W/m-K 64
13
Thermal Expansion, µm/m-K 18
12

Otherwise Unclassified Properties

Density, g/cm3 8.6
9.1
Embodied Carbon, kg CO2/kg material 4.1
20
Embodied Energy, MJ/kg 67
320
Embodied Water, L/kg 420
440

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 14
190
Resilience: Unit (Modulus of Resilience), kJ/m3 100
510
Stiffness to Weight: Axial, points 6.8
13
Stiffness to Weight: Bending, points 18
22
Strength to Weight: Axial, points 7.5
31
Strength to Weight: Bending, points 9.7
25
Thermal Diffusivity, mm2/s 20
3.3
Thermal Shock Resistance, points 8.8
28

Alloy Composition

Aluminum (Al), % 0 to 0.0050
0
Antimony (Sb), % 0 to 0.2
0
Carbon (C), % 0
0.32 to 0.42
Chromium (Cr), % 0
19 to 21
Cobalt (Co), % 0
40 to 49.8
Copper (Cu), % 84 to 86
0
Iron (Fe), % 0 to 0.1
0 to 5.0
Lead (Pb), % 0 to 0.2
0
Manganese (Mn), % 0
1.0 to 2.0
Molybdenum (Mo), % 0
3.5 to 4.5
Nickel (Ni), % 0 to 0.8
19 to 21
Niobium (Nb), % 0
3.5 to 4.5
Phosphorus (P), % 0 to 1.5
0 to 0.040
Silicon (Si), % 0 to 0.0050
0 to 1.0
Sulfur (S), % 0 to 0.050
0 to 0.030
Tantalum (Ta), % 0
3.5 to 4.5
Tin (Sn), % 14 to 16
0
Tungsten (W), % 0
3.5 to 4.5
Zinc (Zn), % 0 to 1.5
0
Residuals, % 0 to 0.6
0