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R31538 Cobalt vs. C91700 Bronze

R31538 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 R31538 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, % 13 to 23
13
Poisson's Ratio 0.29
0.34
Shear Modulus, GPa 86
41
Tensile Strength: Ultimate (UTS), MPa 1020 to 1360
330
Tensile Strength: Yield (Proof), MPa 580 to 930
170

Thermal Properties

Latent Heat of Fusion, J/g 320
190
Melting Completion (Liquidus), °C 1360
1020
Melting Onset (Solidus), °C 1290
850
Specific Heat Capacity, J/kg-K 450
370
Thermal Conductivity, W/m-K 13
71
Thermal Expansion, µm/m-K 13
18

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.0
10
Electrical Conductivity: Equal Weight (Specific), % IACS 2.1
10

Otherwise Unclassified Properties

Density, g/cm3 8.4
8.7
Embodied Carbon, kg CO2/kg material 8.1
3.9
Embodied Energy, MJ/kg 110
63
Embodied Water, L/kg 530
400

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 140 to 200
35
Resilience: Unit (Modulus of Resilience), kJ/m3 750 to 1920
140
Stiffness to Weight: Axial, points 15
6.9
Stiffness to Weight: Bending, points 24
18
Strength to Weight: Axial, points 34 to 45
11
Strength to Weight: Bending, points 27 to 32
12
Thermal Diffusivity, mm2/s 3.5
22
Thermal Shock Resistance, points 25 to 33
12

Alloy Composition

Aluminum (Al), % 0
0 to 0.0050
Antimony (Sb), % 0
0 to 0.2
Carbon (C), % 0.15 to 0.35
0
Chromium (Cr), % 26 to 30
0
Cobalt (Co), % 58.7 to 68.9
0
Copper (Cu), % 0
84.2 to 87.5
Iron (Fe), % 0 to 0.75
0 to 0.2
Lead (Pb), % 0
0 to 0.25
Manganese (Mn), % 0 to 1.0
0
Molybdenum (Mo), % 5.0 to 7.0
0
Nickel (Ni), % 0 to 1.0
1.2 to 2.0
Nitrogen (N), % 0 to 0.25
0
Phosphorus (P), % 0
0 to 0.3
Silicon (Si), % 0 to 1.0
0 to 0.0050
Sulfur (S), % 0
0 to 0.050
Tin (Sn), % 0
11.3 to 12.5
Zinc (Zn), % 0
0 to 0.25