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EN AC-21100 Aluminum vs. R30008 Cobalt

EN AC-21100 aluminum belongs to the aluminum alloys classification, while R30008 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-21100 aluminum and the bottom bar is R30008 cobalt.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 71
210
Elongation at Break, % 6.2 to 7.3
1.1 to 73
Fatigue Strength, MPa 79 to 87
320 to 530
Poisson's Ratio 0.33
0.29
Shear Modulus, GPa 27
83
Tensile Strength: Ultimate (UTS), MPa 340 to 350
950 to 1700
Tensile Strength: Yield (Proof), MPa 210 to 240
500 to 1080

Thermal Properties

Latent Heat of Fusion, J/g 390
320
Melting Completion (Liquidus), °C 670
1400
Melting Onset (Solidus), °C 550
1330
Specific Heat Capacity, J/kg-K 880
450
Thermal Expansion, µm/m-K 23
13

Otherwise Unclassified Properties

Base Metal Price, % relative 11
95
Density, g/cm3 3.0
8.4
Embodied Carbon, kg CO2/kg material 8.0
8.1
Embodied Energy, MJ/kg 150
110
Embodied Water, L/kg 1150
400

Common Calculations

Resilience: Unit (Modulus of Resilience), kJ/m3 300 to 400
590 to 2720
Stiffness to Weight: Axial, points 13
14
Stiffness to Weight: Bending, points 46
24
Strength to Weight: Axial, points 31 to 33
31 to 56
Strength to Weight: Bending, points 36 to 37
25 to 37
Thermal Shock Resistance, points 15
25 to 44

Alloy Composition

Aluminum (Al), % 93.4 to 95.7
0
Boron (B), % 0
0 to 0.0010
Carbon (C), % 0
0 to 0.15
Chromium (Cr), % 0
18.5 to 21.5
Cobalt (Co), % 0
39 to 42
Copper (Cu), % 4.2 to 5.2
0
Iron (Fe), % 0 to 0.19
7.6 to 20
Manganese (Mn), % 0 to 0.55
1.0 to 2.0
Molybdenum (Mo), % 0
6.5 to 7.5
Nickel (Ni), % 0
15 to 18
Phosphorus (P), % 0
0 to 0.015
Silicon (Si), % 0 to 0.18
0 to 1.2
Sulfur (S), % 0
0 to 0.015
Titanium (Ti), % 0.15 to 0.3
0
Zinc (Zn), % 0 to 0.070
0
Residuals, % 0 to 0.1
0