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EN AC-47000 Aluminum vs. R30012 Cobalt

EN AC-47000 aluminum belongs to the aluminum alloys classification, while R30012 cobalt belongs to the cobalt alloys. There are 27 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-47000 aluminum and the bottom bar is R30012 cobalt.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 73
220
Elongation at Break, % 1.7
1.0
Fatigue Strength, MPa 68
320
Poisson's Ratio 0.33
0.28
Shear Modulus, GPa 27
86
Tensile Strength: Ultimate (UTS), MPa 180
830
Tensile Strength: Yield (Proof), MPa 97
650

Thermal Properties

Latent Heat of Fusion, J/g 570
320
Melting Completion (Liquidus), °C 590
1470
Melting Onset (Solidus), °C 570
1280
Specific Heat Capacity, J/kg-K 900
440
Thermal Conductivity, W/m-K 130
15
Thermal Expansion, µm/m-K 21
12

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 33
1.8
Electrical Conductivity: Equal Weight (Specific), % IACS 110
1.8

Otherwise Unclassified Properties

Density, g/cm3 2.6
8.8
Embodied Carbon, kg CO2/kg material 7.7
8.3
Embodied Energy, MJ/kg 140
120
Embodied Water, L/kg 1040
480

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 2.5
7.7
Resilience: Unit (Modulus of Resilience), kJ/m3 65
960
Stiffness to Weight: Axial, points 16
14
Stiffness to Weight: Bending, points 54
23
Strength to Weight: Axial, points 19
26
Strength to Weight: Bending, points 27
22
Thermal Diffusivity, mm2/s 55
3.8
Thermal Shock Resistance, points 8.3
23

Alloy Composition

Aluminum (Al), % 82.1 to 89.5
0
Carbon (C), % 0
1.4 to 2.0
Chromium (Cr), % 0 to 0.1
27 to 32
Cobalt (Co), % 0
47.5 to 64.1
Copper (Cu), % 0 to 1.0
0
Iron (Fe), % 0 to 0.8
0 to 3.0
Lead (Pb), % 0 to 0.2
0
Magnesium (Mg), % 0 to 0.35
0
Manganese (Mn), % 0.050 to 0.55
0
Molybdenum (Mo), % 0
0 to 1.0
Nickel (Ni), % 0 to 0.3
0 to 3.0
Silicon (Si), % 10.5 to 13.5
0 to 2.0
Tin (Sn), % 0 to 0.1
0
Titanium (Ti), % 0 to 0.2
0
Tungsten (W), % 0
7.5 to 9.5
Zinc (Zn), % 0 to 0.55
0
Residuals, % 0 to 0.25
0