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R31538 Cobalt vs. C44400 Brass

R31538 cobalt belongs to the cobalt alloys classification, while C44400 brass belongs to the copper alloys. There are 24 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 C44400 brass.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 220
110
Poisson's Ratio 0.29
0.32
Shear Modulus, GPa 86
41
Tensile Strength: Ultimate (UTS), MPa 1020 to 1360
350
Tensile Strength: Yield (Proof), MPa 580 to 930
120

Thermal Properties

Latent Heat of Fusion, J/g 320
180
Melting Completion (Liquidus), °C 1360
940
Melting Onset (Solidus), °C 1290
900
Specific Heat Capacity, J/kg-K 450
380
Thermal Conductivity, W/m-K 13
110
Thermal Expansion, µm/m-K 13
20

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.0
25
Electrical Conductivity: Equal Weight (Specific), % IACS 2.1
27

Otherwise Unclassified Properties

Density, g/cm3 8.4
8.3
Embodied Carbon, kg CO2/kg material 8.1
2.8
Embodied Energy, MJ/kg 110
46
Embodied Water, L/kg 530
330

Common Calculations

Resilience: Unit (Modulus of Resilience), kJ/m3 750 to 1920
65
Stiffness to Weight: Axial, points 15
7.2
Stiffness to Weight: Bending, points 24
19
Strength to Weight: Axial, points 34 to 45
12
Strength to Weight: Bending, points 27 to 32
13
Thermal Diffusivity, mm2/s 3.5
35
Thermal Shock Resistance, points 25 to 33
12

Alloy Composition


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Antimony (Sb), % 0
0.020 to 0.1
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
70 to 73
Iron (Fe), % 0 to 0.75
0 to 0.060
Lead (Pb), % 0
0 to 0.070
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
0.9 to 1.2
Zinc (Zn), % 0
25.2 to 29.1
Residuals, % 0
0 to 0.4