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C38500 Bronze vs. R30016 Cobalt

C38500 bronze belongs to the copper alloys classification, while R30016 cobalt belongs to the cobalt alloys. There are 26 material properties with values for both materials. Properties with values for just one material (9, in this case) are not shown.

For each property being compared, the top bar is C38500 bronze and the bottom bar is R30016 cobalt.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 100
220
Elongation at Break, % 17
8.4
Poisson's Ratio 0.31
0.28
Shear Modulus, GPa 37
85
Tensile Strength: Ultimate (UTS), MPa 370
1010
Tensile Strength: Yield (Proof), MPa 130
580

Thermal Properties

Latent Heat of Fusion, J/g 160
320
Melting Completion (Liquidus), °C 890
1360
Melting Onset (Solidus), °C 880
1270
Specific Heat Capacity, J/kg-K 380
450
Thermal Conductivity, W/m-K 120
15
Thermal Expansion, µm/m-K 21
14

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 28
1.9
Electrical Conductivity: Equal Weight (Specific), % IACS 31
2.0

Otherwise Unclassified Properties

Density, g/cm3 8.1
8.5
Embodied Carbon, kg CO2/kg material 2.6
7.7
Embodied Energy, MJ/kg 45
110
Embodied Water, L/kg 320
500

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 48
72
Resilience: Unit (Modulus of Resilience), kJ/m3 78
770
Stiffness to Weight: Axial, points 7.0
14
Stiffness to Weight: Bending, points 19
24
Strength to Weight: Axial, points 13
33
Strength to Weight: Bending, points 14
26
Thermal Diffusivity, mm2/s 40
3.9
Thermal Shock Resistance, points 12
24

Alloy Composition

Carbon (C), % 0
0.9 to 1.4
Chromium (Cr), % 0
28 to 32
Cobalt (Co), % 0
49.6 to 66.9
Copper (Cu), % 55 to 59
0
Iron (Fe), % 0 to 0.35
0 to 3.0
Lead (Pb), % 2.5 to 3.5
0
Manganese (Mn), % 0
0.5 to 2.0
Molybdenum (Mo), % 0
0 to 1.5
Nickel (Ni), % 0
0 to 3.0
Silicon (Si), % 0
0.2 to 2.0
Tungsten (W), % 0
3.5 to 5.5
Zinc (Zn), % 36.7 to 42.5
0
Residuals, % 0 to 0.5
0