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C95700 Bronze vs. R30012 Cobalt

C95700 bronze belongs to the copper alloys classification, while R30012 cobalt belongs to the cobalt alloys. There are 26 material properties with values for both materials. Properties with values for just one material (5, in this case) are not shown.

For each property being compared, the top bar is C95700 bronze and the bottom bar is R30012 cobalt.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 130
220
Elongation at Break, % 23
1.0
Poisson's Ratio 0.34
0.28
Shear Modulus, GPa 47
86
Tensile Strength: Ultimate (UTS), MPa 680
830
Tensile Strength: Yield (Proof), MPa 310
650

Thermal Properties

Latent Heat of Fusion, J/g 230
320
Melting Completion (Liquidus), °C 990
1470
Melting Onset (Solidus), °C 950
1280
Specific Heat Capacity, J/kg-K 440
440
Thermal Conductivity, W/m-K 12
15
Thermal Expansion, µm/m-K 18
12

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 3.0
1.8
Electrical Conductivity: Equal Weight (Specific), % IACS 3.3
1.8

Otherwise Unclassified Properties

Density, g/cm3 8.2
8.8
Embodied Carbon, kg CO2/kg material 3.3
8.3
Embodied Energy, MJ/kg 54
120
Embodied Water, L/kg 360
480

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 130
7.7
Resilience: Unit (Modulus of Resilience), kJ/m3 390
960
Stiffness to Weight: Axial, points 8.5
14
Stiffness to Weight: Bending, points 20
23
Strength to Weight: Axial, points 23
26
Strength to Weight: Bending, points 21
22
Thermal Diffusivity, mm2/s 3.3
3.8
Thermal Shock Resistance, points 21
23

Alloy Composition

Aluminum (Al), % 7.0 to 8.5
0
Carbon (C), % 0
1.4 to 2.0
Chromium (Cr), % 0
27 to 32
Cobalt (Co), % 0
47.5 to 64.1
Copper (Cu), % 71 to 78.5
0
Iron (Fe), % 2.0 to 4.0
0 to 3.0
Lead (Pb), % 0 to 0.030
0
Manganese (Mn), % 11 to 14
0
Molybdenum (Mo), % 0
0 to 1.0
Nickel (Ni), % 1.5 to 3.0
0 to 3.0
Silicon (Si), % 0 to 0.1
0 to 2.0
Tungsten (W), % 0
7.5 to 9.5
Residuals, % 0 to 0.5
0