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EN AC-48000 Aluminum vs. R30816 Cobalt

EN AC-48000 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-48000 aluminum and the bottom bar is R30816 cobalt.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 100 to 110
280
Elastic (Young's, Tensile) Modulus, GPa 73
210
Elongation at Break, % 1.0
23
Fatigue Strength, MPa 85 to 86
250
Poisson's Ratio 0.33
0.3
Shear Modulus, GPa 28
81
Tensile Strength: Ultimate (UTS), MPa 220 to 310
1020
Tensile Strength: Yield (Proof), MPa 210 to 270
460

Thermal Properties

Latent Heat of Fusion, J/g 570
300
Melting Completion (Liquidus), °C 600
1540
Melting Onset (Solidus), °C 560
1460
Specific Heat Capacity, J/kg-K 890
420
Thermal Conductivity, W/m-K 130
13
Thermal Expansion, µm/m-K 21
12

Otherwise Unclassified Properties

Density, g/cm3 2.7
9.1
Embodied Carbon, kg CO2/kg material 7.9
20
Embodied Energy, MJ/kg 140
320
Embodied Water, L/kg 1030
440

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 2.2 to 3.0
190
Resilience: Unit (Modulus of Resilience), kJ/m3 300 to 510
510
Stiffness to Weight: Axial, points 15
13
Stiffness to Weight: Bending, points 53
22
Strength to Weight: Axial, points 23 to 33
31
Strength to Weight: Bending, points 31 to 39
25
Thermal Diffusivity, mm2/s 54
3.3
Thermal Shock Resistance, points 10 to 15
28

Alloy Composition

Aluminum (Al), % 80.4 to 87.2
0
Carbon (C), % 0
0.32 to 0.42
Chromium (Cr), % 0
19 to 21
Cobalt (Co), % 0
40 to 49.8
Copper (Cu), % 0.8 to 1.5
0
Iron (Fe), % 0 to 0.7
0 to 5.0
Magnesium (Mg), % 0.8 to 1.5
0
Manganese (Mn), % 0 to 0.35
1.0 to 2.0
Molybdenum (Mo), % 0
3.5 to 4.5
Nickel (Ni), % 0.7 to 1.3
19 to 21
Niobium (Nb), % 0
3.5 to 4.5
Phosphorus (P), % 0
0 to 0.040
Silicon (Si), % 10.5 to 13.5
0 to 1.0
Sulfur (S), % 0
0 to 0.030
Tantalum (Ta), % 0
3.5 to 4.5
Titanium (Ti), % 0 to 0.25
0
Tungsten (W), % 0
3.5 to 4.5
Zinc (Zn), % 0 to 0.35
0
Residuals, % 0 to 0.15
0