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EN AC-71100 Aluminum vs. R30605 Cobalt

EN AC-71100 aluminum belongs to the aluminum alloys classification, while R30605 cobalt belongs to the cobalt alloys. There are 23 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 EN AC-71100 aluminum and the bottom bar is R30605 cobalt.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 72
210
Elongation at Break, % 1.1
34
Fatigue Strength, MPa 150
260 to 590
Poisson's Ratio 0.32
0.29
Shear Modulus, GPa 27
81
Tensile Strength: Ultimate (UTS), MPa 260
1130 to 1900
Tensile Strength: Yield (Proof), MPa 230
470 to 1600

Thermal Properties

Latent Heat of Fusion, J/g 490
290
Melting Completion (Liquidus), °C 580
1410
Melting Onset (Solidus), °C 520
1330
Specific Heat Capacity, J/kg-K 860
410
Thermal Expansion, µm/m-K 22
12

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 32
2.0
Electrical Conductivity: Equal Weight (Specific), % IACS 97
1.8

Otherwise Unclassified Properties

Density, g/cm3 2.9
9.6
Embodied Carbon, kg CO2/kg material 7.4
9.8
Embodied Energy, MJ/kg 140
140
Embodied Water, L/kg 1010
450

Common Calculations

Stiffness to Weight: Axial, points 14
12
Stiffness to Weight: Bending, points 47
21
Strength to Weight: Axial, points 25
33 to 55
Strength to Weight: Bending, points 31
25 to 36
Thermal Shock Resistance, points 12
31 to 52

Alloy Composition

Aluminum (Al), % 78.7 to 83.3
0
Carbon (C), % 0
0.050 to 0.15
Chromium (Cr), % 0
19 to 21
Cobalt (Co), % 0
46.4 to 57
Copper (Cu), % 0 to 0.1
0
Iron (Fe), % 0 to 0.3
0 to 3.0
Magnesium (Mg), % 0.2 to 0.5
0
Manganese (Mn), % 0 to 0.15
1.0 to 2.0
Nickel (Ni), % 0
9.0 to 11
Phosphorus (P), % 0
0 to 0.040
Silicon (Si), % 7.5 to 9.5
0 to 0.4
Sulfur (S), % 0
0 to 0.030
Titanium (Ti), % 0 to 0.15
0
Tungsten (W), % 0
14 to 16
Zinc (Zn), % 9.0 to 10.5
0
Residuals, % 0 to 0.15
0