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EN AC-21100 Aluminum vs. R30001 Cobalt

EN AC-21100 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 (9, 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 EN AC-21100 aluminum and the bottom bar is R30001 cobalt.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 71
220
Elongation at Break, % 6.2 to 7.3
1.0
Poisson's Ratio 0.33
0.28
Shear Modulus, GPa 27
86
Tensile Strength: Ultimate (UTS), MPa 340 to 350
620

Thermal Properties

Latent Heat of Fusion, J/g 390
310
Melting Completion (Liquidus), °C 670
1530
Melting Onset (Solidus), °C 550
1260
Specific Heat Capacity, J/kg-K 880
430
Thermal Conductivity, W/m-K 130
15
Thermal Expansion, µm/m-K 23
11

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 34
1.8
Electrical Conductivity: Equal Weight (Specific), % IACS 100
1.8

Otherwise Unclassified Properties

Density, g/cm3 3.0
9.0
Embodied Carbon, kg CO2/kg material 8.0
8.9
Embodied Energy, MJ/kg 150
130
Embodied Water, L/kg 1150
460

Common Calculations

Stiffness to Weight: Axial, points 13
14
Stiffness to Weight: Bending, points 46
22
Strength to Weight: Axial, points 31 to 33
19
Strength to Weight: Bending, points 36 to 37
18
Thermal Diffusivity, mm2/s 48
3.7
Thermal Shock Resistance, points 15
19

Alloy Composition


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Aluminum (Al), % 93.4 to 95.7
0
Carbon (C), % 0
2.0 to 3.0
Chromium (Cr), % 0
28 to 32
Cobalt (Co), % 0
43 to 59
Copper (Cu), % 4.2 to 5.2
0
Iron (Fe), % 0 to 0.19
0 to 3.0
Manganese (Mn), % 0 to 0.55
0
Molybdenum (Mo), % 0
0 to 1.0
Nickel (Ni), % 0
0 to 3.0
Silicon (Si), % 0 to 0.18
0 to 2.0
Titanium (Ti), % 0.15 to 0.3
0
Tungsten (W), % 0
11 to 13
Zinc (Zn), % 0 to 0.070
0
Residuals, % 0 to 0.1
0