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C91700 Bronze vs. R31538 Cobalt

C91700 bronze belongs to the copper alloys classification, while R31538 cobalt belongs to the cobalt 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 C91700 bronze and the bottom bar is R31538 cobalt.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 110
220
Elongation at Break, % 13
13 to 23
Poisson's Ratio 0.34
0.29
Shear Modulus, GPa 41
86
Tensile Strength: Ultimate (UTS), MPa 330
1020 to 1360
Tensile Strength: Yield (Proof), MPa 170
580 to 930

Thermal Properties

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

Electrical Properties

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

Otherwise Unclassified Properties

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

Common Calculations

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

Alloy Composition

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