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R30012 Cobalt vs. C91700 Bronze

R30012 cobalt belongs to the cobalt alloys classification, while C91700 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 R30012 cobalt and the bottom bar is C91700 bronze.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 220
110
Elongation at Break, % 1.0
13
Poisson's Ratio 0.28
0.34
Shear Modulus, GPa 86
41
Tensile Strength: Ultimate (UTS), MPa 830
330
Tensile Strength: Yield (Proof), MPa 650
170

Thermal Properties

Latent Heat of Fusion, J/g 320
190
Melting Completion (Liquidus), °C 1470
1020
Melting Onset (Solidus), °C 1280
850
Specific Heat Capacity, J/kg-K 440
370
Thermal Conductivity, W/m-K 15
71
Thermal Expansion, µm/m-K 12
18

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 1.8
10
Electrical Conductivity: Equal Weight (Specific), % IACS 1.8
10

Otherwise Unclassified Properties

Density, g/cm3 8.8
8.7
Embodied Carbon, kg CO2/kg material 8.3
3.9
Embodied Energy, MJ/kg 120
63
Embodied Water, L/kg 480
400

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 7.7
35
Resilience: Unit (Modulus of Resilience), kJ/m3 960
140
Stiffness to Weight: Axial, points 14
6.9
Stiffness to Weight: Bending, points 23
18
Strength to Weight: Axial, points 26
11
Strength to Weight: Bending, points 22
12
Thermal Diffusivity, mm2/s 3.8
22
Thermal Shock Resistance, points 23
12

Alloy Composition

Aluminum (Al), % 0
0 to 0.0050
Antimony (Sb), % 0
0 to 0.2
Carbon (C), % 1.4 to 2.0
0
Chromium (Cr), % 27 to 32
0
Cobalt (Co), % 47.5 to 64.1
0
Copper (Cu), % 0
84.2 to 87.5
Iron (Fe), % 0 to 3.0
0 to 0.2
Lead (Pb), % 0
0 to 0.25
Molybdenum (Mo), % 0 to 1.0
0
Nickel (Ni), % 0 to 3.0
1.2 to 2.0
Phosphorus (P), % 0
0 to 0.3
Silicon (Si), % 0 to 2.0
0 to 0.0050
Sulfur (S), % 0
0 to 0.050
Tin (Sn), % 0
11.3 to 12.5
Tungsten (W), % 7.5 to 9.5
0
Zinc (Zn), % 0
0 to 0.25