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R31538 Cobalt vs. 535.0 Aluminum

R31538 cobalt belongs to the cobalt alloys classification, while 535.0 aluminum belongs to the aluminum alloys. There are 27 material properties with values for both materials. Properties with values for just one material (7, in this case) are not shown. Please note that the two materials have significantly dissimilar densities. This means that additional care is required when interpreting the data, because some material properties are based on units of mass, while others are based on units of area or volume.

For each property being compared, the top bar is R31538 cobalt and the bottom bar is 535.0 aluminum.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 220
67
Elongation at Break, % 13 to 23
10
Fatigue Strength, MPa 310 to 480
70
Poisson's Ratio 0.29
0.33
Shear Modulus, GPa 86
25
Tensile Strength: Ultimate (UTS), MPa 1020 to 1360
270
Tensile Strength: Yield (Proof), MPa 580 to 930
140

Thermal Properties

Latent Heat of Fusion, J/g 320
390
Melting Completion (Liquidus), °C 1360
630
Melting Onset (Solidus), °C 1290
570
Specific Heat Capacity, J/kg-K 450
910
Thermal Conductivity, W/m-K 13
100
Thermal Expansion, µm/m-K 13
24

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.0
23
Electrical Conductivity: Equal Weight (Specific), % IACS 2.1
79

Otherwise Unclassified Properties

Density, g/cm3 8.4
2.6
Embodied Carbon, kg CO2/kg material 8.1
9.4
Embodied Energy, MJ/kg 110
160
Embodied Water, L/kg 530
1180

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 140 to 200
24
Resilience: Unit (Modulus of Resilience), kJ/m3 750 to 1920
150
Stiffness to Weight: Axial, points 15
14
Stiffness to Weight: Bending, points 24
51
Strength to Weight: Axial, points 34 to 45
28
Strength to Weight: Bending, points 27 to 32
35
Thermal Diffusivity, mm2/s 3.5
42
Thermal Shock Resistance, points 25 to 33
12

Alloy Composition


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Aluminum (Al), % 0
91.5 to 93.6
Beryllium (Be), % 0
0.0030 to 0.0070
Boron (B), % 0
0 to 0.0050
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
0 to 0.050
Iron (Fe), % 0 to 0.75
0 to 0.15
Magnesium (Mg), % 0
6.2 to 7.5
Manganese (Mn), % 0 to 1.0
0.1 to 0.25
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 to 0.15
Titanium (Ti), % 0
0.1 to 0.25
Residuals, % 0
0 to 0.15