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C87500 Brass vs. R31539 Cobalt

C87500 brass belongs to the copper alloys classification, while R31539 cobalt belongs to the cobalt alloys. There are 26 material properties with values for both materials. Properties with values for just one material (5, in this case) are not shown.

For each property being compared, the top bar is C87500 brass and the bottom bar is R31539 cobalt.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 110
220
Elongation at Break, % 18
13 to 22
Poisson's Ratio 0.33
0.29
Shear Modulus, GPa 42
86
Tensile Strength: Ultimate (UTS), MPa 460
1000 to 1340
Tensile Strength: Yield (Proof), MPa 190
590 to 940

Thermal Properties

Latent Heat of Fusion, J/g 260
320
Melting Completion (Liquidus), °C 920
1360
Melting Onset (Solidus), °C 820
1290
Specific Heat Capacity, J/kg-K 410
450
Thermal Conductivity, W/m-K 28
13
Thermal Expansion, µm/m-K 18
13

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 6.7
2.0
Electrical Conductivity: Equal Weight (Specific), % IACS 7.3
2.1

Otherwise Unclassified Properties

Density, g/cm3 8.3
8.4
Embodied Carbon, kg CO2/kg material 2.7
8.2
Embodied Energy, MJ/kg 44
110
Embodied Water, L/kg 300
530

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 67
140 to 190
Resilience: Unit (Modulus of Resilience), kJ/m3 160
780 to 2000
Stiffness to Weight: Axial, points 7.4
15
Stiffness to Weight: Bending, points 19
24
Strength to Weight: Axial, points 16
33 to 44
Strength to Weight: Bending, points 16
27 to 32
Thermal Diffusivity, mm2/s 8.3
3.5
Thermal Shock Resistance, points 17
24 to 32

Alloy Composition

Aluminum (Al), % 0 to 0.5
0.3 to 1.0
Carbon (C), % 0
0 to 0.14
Chromium (Cr), % 0
26 to 30
Cobalt (Co), % 0
57.7 to 68.7
Copper (Cu), % 79 to 85
0
Iron (Fe), % 0
0 to 0.75
Lanthanum (La), % 0
0.030 to 0.2
Lead (Pb), % 0 to 0.5
0
Manganese (Mn), % 0
0 to 1.0
Molybdenum (Mo), % 0
5.0 to 7.0
Nickel (Ni), % 0
0 to 1.0
Nitrogen (N), % 0
0 to 0.25
Silicon (Si), % 3.0 to 5.0
0 to 1.0
Zinc (Zn), % 12 to 16
0
Residuals, % 0 to 0.5
0