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C87500 Brass vs. R30012 Cobalt

C87500 brass belongs to the copper alloys classification, while R30012 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 R30012 cobalt.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 110
220
Elongation at Break, % 18
1.0
Poisson's Ratio 0.33
0.28
Shear Modulus, GPa 42
86
Tensile Strength: Ultimate (UTS), MPa 460
830
Tensile Strength: Yield (Proof), MPa 190
650

Thermal Properties

Latent Heat of Fusion, J/g 260
320
Melting Completion (Liquidus), °C 920
1470
Melting Onset (Solidus), °C 820
1280
Specific Heat Capacity, J/kg-K 410
440
Thermal Conductivity, W/m-K 28
15
Thermal Expansion, µm/m-K 18
12

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 6.7
1.8
Electrical Conductivity: Equal Weight (Specific), % IACS 7.3
1.8

Otherwise Unclassified Properties

Density, g/cm3 8.3
8.8
Embodied Carbon, kg CO2/kg material 2.7
8.3
Embodied Energy, MJ/kg 44
120
Embodied Water, L/kg 300
480

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 67
7.7
Resilience: Unit (Modulus of Resilience), kJ/m3 160
960
Stiffness to Weight: Axial, points 7.4
14
Stiffness to Weight: Bending, points 19
23
Strength to Weight: Axial, points 16
26
Strength to Weight: Bending, points 16
22
Thermal Diffusivity, mm2/s 8.3
3.8
Thermal Shock Resistance, points 17
23

Alloy Composition

Aluminum (Al), % 0 to 0.5
0
Carbon (C), % 0
1.4 to 2.0
Chromium (Cr), % 0
27 to 32
Cobalt (Co), % 0
47.5 to 64.1
Copper (Cu), % 79 to 85
0
Iron (Fe), % 0
0 to 3.0
Lead (Pb), % 0 to 0.5
0
Molybdenum (Mo), % 0
0 to 1.0
Nickel (Ni), % 0
0 to 3.0
Silicon (Si), % 3.0 to 5.0
0 to 2.0
Tungsten (W), % 0
7.5 to 9.5
Zinc (Zn), % 12 to 16
0
Residuals, % 0 to 0.5
0