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C87200 Bronze vs. R30155 Cobalt

C87200 bronze belongs to the copper alloys classification, while R30155 cobalt belongs to the iron alloys. There are 27 material properties with values for both materials. Properties with values for just one material (7, in this case) are not shown.

For each property being compared, the top bar is C87200 bronze and the bottom bar is R30155 cobalt.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 85
220
Elastic (Young's, Tensile) Modulus, GPa 110
210
Elongation at Break, % 30
34
Poisson's Ratio 0.34
0.29
Shear Modulus, GPa 43
81
Tensile Strength: Ultimate (UTS), MPa 380
850
Tensile Strength: Yield (Proof), MPa 170
390

Thermal Properties

Latent Heat of Fusion, J/g 260
300
Maximum Temperature: Mechanical, °C 200
1100
Melting Completion (Liquidus), °C 970
1470
Melting Onset (Solidus), °C 860
1420
Specific Heat Capacity, J/kg-K 410
450
Thermal Conductivity, W/m-K 28
12
Thermal Expansion, µm/m-K 17
14

Otherwise Unclassified Properties

Base Metal Price, % relative 29
80
Density, g/cm3 8.6
8.5
Embodied Carbon, kg CO2/kg material 2.7
9.7
Embodied Energy, MJ/kg 44
150
Embodied Water, L/kg 310
300

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 93
230
Resilience: Unit (Modulus of Resilience), kJ/m3 130
370
Stiffness to Weight: Axial, points 7.4
14
Stiffness to Weight: Bending, points 19
23
Strength to Weight: Axial, points 12
28
Strength to Weight: Bending, points 14
24
Thermal Diffusivity, mm2/s 8.0
3.2
Thermal Shock Resistance, points 14
21

Alloy Composition

Aluminum (Al), % 0 to 1.5
0
Carbon (C), % 0
0.080 to 0.16
Chromium (Cr), % 0
20 to 22.5
Cobalt (Co), % 0
18.5 to 21
Copper (Cu), % 89 to 99
0
Iron (Fe), % 0 to 2.5
24.3 to 36.2
Lead (Pb), % 0 to 0.5
0
Manganese (Mn), % 0 to 1.5
1.0 to 2.0
Molybdenum (Mo), % 0
2.5 to 3.5
Nickel (Ni), % 0
19 to 21
Niobium (Nb), % 0
0.75 to 1.3
Nitrogen (N), % 0
0 to 0.2
Phosphorus (P), % 0 to 0.5
0 to 0.040
Silicon (Si), % 1.0 to 5.0
0 to 1.0
Sulfur (S), % 0
0 to 0.030
Tantalum (Ta), % 0
0.75 to 1.3
Tin (Sn), % 0 to 1.0
0
Tungsten (W), % 0
2.0 to 3.0
Zinc (Zn), % 0 to 5.0
0