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EN AC-51100 Aluminum vs. R30816 Cobalt

EN AC-51100 aluminum belongs to the aluminum alloys classification, while R30816 cobalt belongs to the cobalt alloys. There are 26 material properties with values for both materials. Properties with values for just one material (5, 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-51100 aluminum and the bottom bar is R30816 cobalt.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 57
280
Elastic (Young's, Tensile) Modulus, GPa 68
210
Elongation at Break, % 4.5
23
Fatigue Strength, MPa 58
250
Poisson's Ratio 0.33
0.3
Shear Modulus, GPa 26
81
Tensile Strength: Ultimate (UTS), MPa 160
1020
Tensile Strength: Yield (Proof), MPa 80
460

Thermal Properties

Latent Heat of Fusion, J/g 400
300
Melting Completion (Liquidus), °C 640
1540
Melting Onset (Solidus), °C 620
1460
Specific Heat Capacity, J/kg-K 900
420
Thermal Conductivity, W/m-K 130
13
Thermal Expansion, µm/m-K 23
12

Otherwise Unclassified Properties

Density, g/cm3 2.7
9.1
Embodied Carbon, kg CO2/kg material 8.7
20
Embodied Energy, MJ/kg 150
320
Embodied Water, L/kg 1180
440

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 6.0
190
Resilience: Unit (Modulus of Resilience), kJ/m3 47
510
Stiffness to Weight: Axial, points 14
13
Stiffness to Weight: Bending, points 51
22
Strength to Weight: Axial, points 17
31
Strength to Weight: Bending, points 25
25
Thermal Diffusivity, mm2/s 53
3.3
Thermal Shock Resistance, points 7.3
28

Alloy Composition

Aluminum (Al), % 94.5 to 97.5
0
Carbon (C), % 0
0.32 to 0.42
Chromium (Cr), % 0
19 to 21
Cobalt (Co), % 0
40 to 49.8
Copper (Cu), % 0 to 0.050
0
Iron (Fe), % 0 to 0.55
0 to 5.0
Magnesium (Mg), % 2.5 to 3.5
0
Manganese (Mn), % 0 to 0.45
1.0 to 2.0
Molybdenum (Mo), % 0
3.5 to 4.5
Nickel (Ni), % 0
19 to 21
Niobium (Nb), % 0
3.5 to 4.5
Phosphorus (P), % 0
0 to 0.040
Silicon (Si), % 0 to 0.55
0 to 1.0
Sulfur (S), % 0
0 to 0.030
Tantalum (Ta), % 0
3.5 to 4.5
Titanium (Ti), % 0 to 0.2
0
Tungsten (W), % 0
3.5 to 4.5
Zinc (Zn), % 0 to 0.1
0
Residuals, % 0 to 0.15
0