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EN AC-45300 Aluminum vs. R30012 Cobalt

EN AC-45300 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-45300 aluminum and the bottom bar is R30012 cobalt.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 71
220
Elongation at Break, % 1.0 to 2.8
1.0
Fatigue Strength, MPa 59 to 72
320
Poisson's Ratio 0.33
0.28
Shear Modulus, GPa 27
86
Tensile Strength: Ultimate (UTS), MPa 220 to 290
830
Tensile Strength: Yield (Proof), MPa 150 to 230
650

Thermal Properties

Latent Heat of Fusion, J/g 470
320
Melting Completion (Liquidus), °C 630
1470
Melting Onset (Solidus), °C 590
1280
Specific Heat Capacity, J/kg-K 890
440
Thermal Conductivity, W/m-K 150
15
Thermal Expansion, µm/m-K 22
12

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 36
1.8
Electrical Conductivity: Equal Weight (Specific), % IACS 120
1.8

Otherwise Unclassified Properties

Density, g/cm3 2.7
8.8
Embodied Carbon, kg CO2/kg material 8.0
8.3
Embodied Energy, MJ/kg 150
120
Embodied Water, L/kg 1120
480

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 2.7 to 5.6
7.7
Resilience: Unit (Modulus of Resilience), kJ/m3 160 to 390
960
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 50
23
Strength to Weight: Axial, points 23 to 29
26
Strength to Weight: Bending, points 30 to 35
22
Thermal Diffusivity, mm2/s 60
3.8
Thermal Shock Resistance, points 10 to 13
23

Alloy Composition

Aluminum (Al), % 90.2 to 94.2
0
Carbon (C), % 0
1.4 to 2.0
Chromium (Cr), % 0
27 to 32
Cobalt (Co), % 0
47.5 to 64.1
Copper (Cu), % 1.0 to 1.5
0
Iron (Fe), % 0 to 0.65
0 to 3.0
Lead (Pb), % 0 to 0.15
0
Magnesium (Mg), % 0.35 to 0.65
0
Manganese (Mn), % 0 to 0.55
0
Molybdenum (Mo), % 0
0 to 1.0
Nickel (Ni), % 0 to 0.25
0 to 3.0
Silicon (Si), % 4.5 to 5.5
0 to 2.0
Tin (Sn), % 0 to 0.050
0
Titanium (Ti), % 0 to 0.25
0
Tungsten (W), % 0
7.5 to 9.5
Zinc (Zn), % 0 to 0.15
0
Residuals, % 0 to 0.15
0