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R31538 Cobalt vs. C27400 Brass

R31538 cobalt belongs to the cobalt alloys classification, while C27400 brass belongs to the copper alloys. There are 22 material properties with values for both materials. Properties with values for just one material (11, in this case) are not shown.

For each property being compared, the top bar is R31538 cobalt and the bottom bar is C27400 brass.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 220
110
Poisson's Ratio 0.29
0.31
Shear Modulus, GPa 86
40
Tensile Strength: Ultimate (UTS), MPa 1020 to 1360
370 to 650

Thermal Properties

Latent Heat of Fusion, J/g 320
170
Melting Completion (Liquidus), °C 1360
920
Melting Onset (Solidus), °C 1290
870
Specific Heat Capacity, J/kg-K 450
390
Thermal Conductivity, W/m-K 13
120
Thermal Expansion, µm/m-K 13
21

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.0
28
Electrical Conductivity: Equal Weight (Specific), % IACS 2.1
31

Otherwise Unclassified Properties

Density, g/cm3 8.4
8.0
Embodied Carbon, kg CO2/kg material 8.1
2.7
Embodied Energy, MJ/kg 110
45
Embodied Water, L/kg 530
320

Common Calculations

Stiffness to Weight: Axial, points 15
7.2
Stiffness to Weight: Bending, points 24
20
Strength to Weight: Axial, points 34 to 45
13 to 23
Strength to Weight: Bending, points 27 to 32
14 to 21
Thermal Diffusivity, mm2/s 3.5
37
Thermal Shock Resistance, points 25 to 33
12 to 22

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
61 to 64
Iron (Fe), % 0 to 0.75
0 to 0.1
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
Nitrogen (N), % 0 to 0.25
0
Silicon (Si), % 0 to 1.0
0
Zinc (Zn), % 0
35.6 to 39
Residuals, % 0
0 to 0.3