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R31538 Cobalt vs. C46400 Brass

R31538 cobalt belongs to the cobalt alloys classification, while C46400 brass belongs to the copper alloys. There are 26 material properties with values for both materials. Properties with values for just one material (7, in this case) are not shown.

For each property being compared, the top bar is R31538 cobalt and the bottom bar is C46400 brass.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 220
100
Elongation at Break, % 13 to 23
17 to 40
Poisson's Ratio 0.29
0.31
Shear Modulus, GPa 86
40
Tensile Strength: Ultimate (UTS), MPa 1020 to 1360
400 to 500
Tensile Strength: Yield (Proof), MPa 580 to 930
160 to 320

Thermal Properties

Latent Heat of Fusion, J/g 320
170
Melting Completion (Liquidus), °C 1360
900
Melting Onset (Solidus), °C 1290
890
Specific Heat Capacity, J/kg-K 450
380
Thermal Conductivity, W/m-K 13
120
Thermal Expansion, µm/m-K 13
21

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.0
26
Electrical Conductivity: Equal Weight (Specific), % IACS 2.1
29

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
47
Embodied Water, L/kg 530
330

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 140 to 200
76 to 140
Resilience: Unit (Modulus of Resilience), kJ/m3 750 to 1920
120 to 500
Stiffness to Weight: Axial, points 15
7.2
Stiffness to Weight: Bending, points 24
20
Strength to Weight: Axial, points 34 to 45
14 to 17
Strength to Weight: Bending, points 27 to 32
15 to 17
Thermal Diffusivity, mm2/s 3.5
38
Thermal Shock Resistance, points 25 to 33
13 to 16

Alloy Composition

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
59 to 62
Iron (Fe), % 0 to 0.75
0 to 0.1
Lead (Pb), % 0
0 to 0.2
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
Tin (Sn), % 0
0.5 to 1.0
Zinc (Zn), % 0
36.3 to 40.5
Residuals, % 0
0 to 0.4