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R31537 Cobalt vs. C69430 Brass

R31537 cobalt belongs to the cobalt alloys classification, while C69430 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 R31537 cobalt and the bottom bar is C69430 brass.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 220
110
Elongation at Break, % 14 to 23
17
Poisson's Ratio 0.29
0.33
Shear Modulus, GPa 87
42
Tensile Strength: Ultimate (UTS), MPa 1000 to 1340
570
Tensile Strength: Yield (Proof), MPa 590 to 940
280

Thermal Properties

Latent Heat of Fusion, J/g 320
260
Melting Completion (Liquidus), °C 1360
920
Melting Onset (Solidus), °C 1290
820
Specific Heat Capacity, J/kg-K 450
410
Thermal Conductivity, W/m-K 13
26
Thermal Expansion, µm/m-K 13
18

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.0
6.2
Electrical Conductivity: Equal Weight (Specific), % IACS 2.1
6.7

Otherwise Unclassified Properties

Density, g/cm3 8.4
8.3
Embodied Carbon, kg CO2/kg material 8.1
2.7
Embodied Energy, MJ/kg 110
44
Embodied Water, L/kg 530
300

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 140 to 200
80
Resilience: Unit (Modulus of Resilience), kJ/m3 780 to 1990
340
Stiffness to Weight: Axial, points 15
7.4
Stiffness to Weight: Bending, points 24
19
Strength to Weight: Axial, points 33 to 44
19
Strength to Weight: Bending, points 26 to 32
18
Thermal Diffusivity, mm2/s 3.4
7.7
Thermal Shock Resistance, points 24 to 32
20

Alloy Composition

Arsenic (As), % 0
0.030 to 0.060
Carbon (C), % 0 to 0.14
0
Chromium (Cr), % 26 to 30
0
Cobalt (Co), % 58.9 to 69
0
Copper (Cu), % 0
80 to 83
Iron (Fe), % 0 to 0.75
0 to 0.2
Lead (Pb), % 0
0 to 0.3
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
3.5 to 4.5
Zinc (Zn), % 0
11.4 to 16.5
Residuals, % 0
0 to 0.5