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EN AC-71100 Aluminum vs. R30155 Cobalt

EN AC-71100 aluminum belongs to the aluminum alloys classification, while R30155 cobalt belongs to the iron alloys. There are 26 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 EN AC-71100 aluminum and the bottom bar is R30155 cobalt.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 110
220
Elastic (Young's, Tensile) Modulus, GPa 72
210
Elongation at Break, % 1.1
34
Fatigue Strength, MPa 150
310
Poisson's Ratio 0.32
0.29
Shear Modulus, GPa 27
81
Tensile Strength: Ultimate (UTS), MPa 260
850
Tensile Strength: Yield (Proof), MPa 230
390

Thermal Properties

Latent Heat of Fusion, J/g 490
300
Maximum Temperature: Mechanical, °C 170
1100
Melting Completion (Liquidus), °C 580
1470
Melting Onset (Solidus), °C 520
1420
Specific Heat Capacity, J/kg-K 860
450
Thermal Expansion, µm/m-K 22
14

Otherwise Unclassified Properties

Base Metal Price, % relative 9.5
80
Density, g/cm3 2.9
8.5
Embodied Carbon, kg CO2/kg material 7.4
9.7
Embodied Energy, MJ/kg 140
150
Embodied Water, L/kg 1010
300

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 2.8
230
Resilience: Unit (Modulus of Resilience), kJ/m3 360
370
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 47
23
Strength to Weight: Axial, points 25
28
Strength to Weight: Bending, points 31
24
Thermal Shock Resistance, points 12
21

Alloy Composition

Aluminum (Al), % 78.7 to 83.3
0
Carbon (C), % 0
0.080 to 0.16
Chromium (Cr), % 0
20 to 22.5
Cobalt (Co), % 0
18.5 to 21
Copper (Cu), % 0 to 0.1
0
Iron (Fe), % 0 to 0.3
24.3 to 36.2
Magnesium (Mg), % 0.2 to 0.5
0
Manganese (Mn), % 0 to 0.15
1.0 to 2.0
Molybdenum (Mo), % 0
2.5 to 3.5
Nickel (Ni), % 0
19 to 21
Niobium (Nb), % 0
0.75 to 1.3
Nitrogen (N), % 0
0 to 0.2
Phosphorus (P), % 0
0 to 0.040
Silicon (Si), % 7.5 to 9.5
0 to 1.0
Sulfur (S), % 0
0 to 0.030
Tantalum (Ta), % 0
0.75 to 1.3
Titanium (Ti), % 0 to 0.15
0
Tungsten (W), % 0
2.0 to 3.0
Zinc (Zn), % 9.0 to 10.5
0
Residuals, % 0 to 0.15
0