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R31538 Cobalt vs. C66200 Brass

R31538 cobalt belongs to the cobalt alloys classification, while C66200 brass belongs to the copper 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 R31538 cobalt and the bottom bar is C66200 brass.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 220
110
Elongation at Break, % 13 to 23
8.0 to 15
Poisson's Ratio 0.29
0.33
Shear Modulus, GPa 86
42
Tensile Strength: Ultimate (UTS), MPa 1020 to 1360
450 to 520
Tensile Strength: Yield (Proof), MPa 580 to 930
410 to 480

Thermal Properties

Latent Heat of Fusion, J/g 320
200
Melting Completion (Liquidus), °C 1360
1070
Melting Onset (Solidus), °C 1290
1030
Specific Heat Capacity, J/kg-K 450
390
Thermal Conductivity, W/m-K 13
150
Thermal Expansion, µm/m-K 13
18

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.0
35
Electrical Conductivity: Equal Weight (Specific), % IACS 2.1
36

Otherwise Unclassified Properties

Density, g/cm3 8.4
8.7
Embodied Carbon, kg CO2/kg material 8.1
2.7
Embodied Energy, MJ/kg 110
43
Embodied Water, L/kg 530
320

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 140 to 200
40 to 66
Resilience: Unit (Modulus of Resilience), kJ/m3 750 to 1920
760 to 1030
Stiffness to Weight: Axial, points 15
7.2
Stiffness to Weight: Bending, points 24
19
Strength to Weight: Axial, points 34 to 45
14 to 17
Strength to Weight: Bending, points 27 to 32
15 to 16
Thermal Diffusivity, mm2/s 3.5
45
Thermal Shock Resistance, points 25 to 33
16 to 18

Alloy Composition


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Carbon (C), % 0.15 to 0.35
0
Chromium (Cr), % 26 to 30
0
Cobalt (Co), % 58.7 to 68.9
0
Copper (Cu), % 0
86.6 to 91
Iron (Fe), % 0 to 0.75
0 to 0.050
Lead (Pb), % 0
0 to 0.050
Manganese (Mn), % 0 to 1.0
0
Molybdenum (Mo), % 5.0 to 7.0
0
Nickel (Ni), % 0 to 1.0
0.3 to 1.0
Nitrogen (N), % 0 to 0.25
0
Phosphorus (P), % 0
0.050 to 0.2
Silicon (Si), % 0 to 1.0
0
Tin (Sn), % 0
0.2 to 0.7
Zinc (Zn), % 0
6.5 to 12.9
Residuals, % 0
0 to 0.5