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R31537 Cobalt vs. 328.0 Aluminum

R31537 cobalt belongs to the cobalt alloys classification, while 328.0 aluminum belongs to the aluminum alloys. There are 27 material properties with values for both materials. Properties with values for just one material (6, 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 R31537 cobalt and the bottom bar is 328.0 aluminum.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 220
72
Elongation at Break, % 14 to 23
1.6 to 2.1
Fatigue Strength, MPa 310 to 480
55 to 80
Poisson's Ratio 0.29
0.33
Shear Modulus, GPa 87
27
Tensile Strength: Ultimate (UTS), MPa 1000 to 1340
200 to 270
Tensile Strength: Yield (Proof), MPa 590 to 940
120 to 170

Thermal Properties

Latent Heat of Fusion, J/g 320
510
Melting Completion (Liquidus), °C 1360
620
Melting Onset (Solidus), °C 1290
560
Specific Heat Capacity, J/kg-K 450
890
Thermal Conductivity, W/m-K 13
120
Thermal Expansion, µm/m-K 13
22

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.0
30
Electrical Conductivity: Equal Weight (Specific), % IACS 2.1
99

Otherwise Unclassified Properties

Density, g/cm3 8.4
2.7
Embodied Carbon, kg CO2/kg material 8.1
7.8
Embodied Energy, MJ/kg 110
140
Embodied Water, L/kg 530
1070

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 140 to 200
2.8 to 5.0
Resilience: Unit (Modulus of Resilience), kJ/m3 780 to 1990
92 to 200
Stiffness to Weight: Axial, points 15
15
Stiffness to Weight: Bending, points 24
51
Strength to Weight: Axial, points 33 to 44
21 to 28
Strength to Weight: Bending, points 26 to 32
28 to 34
Thermal Diffusivity, mm2/s 3.4
50
Thermal Shock Resistance, points 24 to 32
9.2 to 12

Alloy Composition

Aluminum (Al), % 0
84.5 to 91.1
Carbon (C), % 0 to 0.14
0
Chromium (Cr), % 26 to 30
0 to 0.35
Cobalt (Co), % 58.9 to 69
0
Copper (Cu), % 0
1.0 to 2.0
Iron (Fe), % 0 to 0.75
0 to 1.0
Magnesium (Mg), % 0
0.2 to 0.6
Manganese (Mn), % 0 to 1.0
0.2 to 0.6
Molybdenum (Mo), % 5.0 to 7.0
0
Nickel (Ni), % 0 to 1.0
0 to 0.25
Nitrogen (N), % 0 to 0.25
0
Silicon (Si), % 0 to 1.0
7.5 to 8.5
Titanium (Ti), % 0
0 to 0.25
Zinc (Zn), % 0
0 to 1.5
Residuals, % 0
0 to 0.5