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238.0 Aluminum vs. R30001 Cobalt

238.0 aluminum belongs to the aluminum alloys classification, while R30001 cobalt belongs to the cobalt alloys. There are 23 material properties with values for both materials. Properties with values for just one material (8, 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 238.0 aluminum and the bottom bar is R30001 cobalt.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 76
220
Elongation at Break, % 1.5
1.0
Poisson's Ratio 0.33
0.28
Shear Modulus, GPa 28
86
Tensile Strength: Ultimate (UTS), MPa 210
620

Thermal Properties

Latent Heat of Fusion, J/g 430
310
Melting Completion (Liquidus), °C 600
1530
Melting Onset (Solidus), °C 510
1260
Specific Heat Capacity, J/kg-K 840
430
Thermal Conductivity, W/m-K 100
15
Thermal Expansion, µm/m-K 21
11

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 25
1.8
Electrical Conductivity: Equal Weight (Specific), % IACS 67
1.8

Otherwise Unclassified Properties

Density, g/cm3 3.4
9.0
Embodied Carbon, kg CO2/kg material 7.4
8.9
Embodied Energy, MJ/kg 140
130
Embodied Water, L/kg 1040
460

Common Calculations

Stiffness to Weight: Axial, points 12
14
Stiffness to Weight: Bending, points 42
22
Strength to Weight: Axial, points 17
19
Strength to Weight: Bending, points 23
18
Thermal Diffusivity, mm2/s 37
3.7
Thermal Shock Resistance, points 9.1
19

Alloy Composition

Aluminum (Al), % 81.9 to 84.9
0
Carbon (C), % 0
2.0 to 3.0
Chromium (Cr), % 0
28 to 32
Cobalt (Co), % 0
43 to 59
Copper (Cu), % 9.5 to 10.5
0
Iron (Fe), % 1.0 to 1.5
0 to 3.0
Magnesium (Mg), % 0 to 0.25
0
Molybdenum (Mo), % 0
0 to 1.0
Nickel (Ni), % 0
0 to 3.0
Silicon (Si), % 3.6 to 4.4
0 to 2.0
Tungsten (W), % 0
11 to 13
Zinc (Zn), % 1.0 to 1.5
0