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R31538 Cobalt vs. C84500 Brass

R31538 cobalt belongs to the cobalt alloys classification, while C84500 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 C84500 brass.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 220
100
Elongation at Break, % 13 to 23
28
Poisson's Ratio 0.29
0.34
Shear Modulus, GPa 86
39
Tensile Strength: Ultimate (UTS), MPa 1020 to 1360
240
Tensile Strength: Yield (Proof), MPa 580 to 930
97

Thermal Properties

Latent Heat of Fusion, J/g 320
180
Melting Completion (Liquidus), °C 1360
980
Melting Onset (Solidus), °C 1290
840
Specific Heat Capacity, J/kg-K 450
360
Thermal Conductivity, W/m-K 13
72
Thermal Expansion, µm/m-K 13
19

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.0
16
Electrical Conductivity: Equal Weight (Specific), % IACS 2.1
17

Otherwise Unclassified Properties

Density, g/cm3 8.4
8.7
Embodied Carbon, kg CO2/kg material 8.1
2.9
Embodied Energy, MJ/kg 110
47
Embodied Water, L/kg 530
340

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 140 to 200
54
Resilience: Unit (Modulus of Resilience), kJ/m3 750 to 1920
45
Stiffness to Weight: Axial, points 15
6.6
Stiffness to Weight: Bending, points 24
18
Strength to Weight: Axial, points 34 to 45
7.7
Strength to Weight: Bending, points 27 to 32
9.8
Thermal Diffusivity, mm2/s 3.5
23
Thermal Shock Resistance, points 25 to 33
8.6

Alloy Composition


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Aluminum (Al), % 0
0 to 0.0050
Antimony (Sb), % 0
0 to 0.25
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
77 to 79
Iron (Fe), % 0 to 0.75
0 to 0.4
Lead (Pb), % 0
6.0 to 7.5
Manganese (Mn), % 0 to 1.0
0
Molybdenum (Mo), % 5.0 to 7.0
0
Nickel (Ni), % 0 to 1.0
0 to 1.0
Nitrogen (N), % 0 to 0.25
0
Phosphorus (P), % 0
0 to 0.020
Silicon (Si), % 0 to 1.0
0 to 0.0050
Sulfur (S), % 0
0 to 0.080
Tin (Sn), % 0
2.0 to 4.0
Zinc (Zn), % 0
10 to 14
Residuals, % 0
0 to 0.7