EN AC-21200 Aluminum vs. R30035 Cobalt
EN AC-21200 aluminum belongs to the aluminum alloys classification, while R30035 cobalt belongs to the cobalt alloys. There are 28 material properties with values for both materials. Properties with values for just one material (3, 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-21200 aluminum and the bottom bar is R30035 cobalt.
Metric UnitsUS Customary Units
Mechanical Properties
| Elastic (Young's, Tensile) Modulus, GPa | 71 | |
| 220 to 230 |
| Elongation at Break, % | 3.9 to 6.2 | |
| 9.0 to 46 |
| Fatigue Strength, MPa | 110 to 130 | |
| 170 to 740 |
| Poisson's Ratio | 0.33 | |
| 0.29 |
| Shear Modulus, GPa | 27 | |
| 84 to 89 |
| Tensile Strength: Ultimate (UTS), MPa | 410 to 440 | |
| 900 to 1900 |
| Tensile Strength: Yield (Proof), MPa | 270 to 360 | |
| 300 to 1650 |
Thermal Properties
| Latent Heat of Fusion, J/g | 390 | |
| 320 |
| Melting Completion (Liquidus), °C | 660 | |
| 1440 |
| Melting Onset (Solidus), °C | 550 | |
| 1320 |
| Specific Heat Capacity, J/kg-K | 880 | |
| 440 |
| Thermal Conductivity, W/m-K | 130 | |
| 11 |
| Thermal Expansion, µm/m-K | 23 | |
| 13 |
Electrical Properties
| Electrical Conductivity: Equal Volume, % IACS | 34 | |
| 1.7 |
| Electrical Conductivity: Equal Weight (Specific), % IACS | 100 | |
| 1.8 |
Otherwise Unclassified Properties
| Base Metal Price, % relative | 10 | |
| 100 |
| Density, g/cm3 | 3.0 | |
| 8.7 |
| Embodied Carbon, kg CO2/kg material | 8.0 | |
| 10 |
| Embodied Energy, MJ/kg | 150 | |
| 140 |
| Embodied Water, L/kg | 1150 | |
| 410 |
Common Calculations
| Resilience: Ultimate (Unit Rupture Work), MJ/m3 | 16 to 22 | |
| 160 to 320 |
| Resilience: Unit (Modulus of Resilience), kJ/m3 | 500 to 930 | |
| 210 to 5920 |
| Stiffness to Weight: Axial, points | 13 | |
| 14 to 15 |
| Stiffness to Weight: Bending, points | 46 | |
| 23 to 24 |
| Strength to Weight: Axial, points | 38 to 40 | |
| 29 to 61 |
| Strength to Weight: Bending, points | 41 to 43 | |
| 24 to 39 |
| Thermal Diffusivity, mm2/s | 49 | |
| 3.0 |
| Thermal Shock Resistance, points | 18 to 19 | |
| 23 to 46 |
Alloy Composition
Deprecated: Automatic conversion of false to array is deprecated in /home/public/compare.php on line 452
| Aluminum (Al), % | 93.3 to 95.7 | |
| 0 |
| Boron (B), % | 0 | |
| 0 to 0.015 |
| Carbon (C), % | 0 | |
| 0 to 0.025 |
| Chromium (Cr), % | 0 | |
| 19 to 21 |
| Cobalt (Co), % | 0 | |
| 29.1 to 39 |
| Copper (Cu), % | 4.0 to 5.0 | |
| 0 |
| Iron (Fe), % | 0 to 0.2 | |
| 0 to 1.0 |
| Lead (Pb), % | 0 to 0.030 | |
| 0 |
| Magnesium (Mg), % | 0.15 to 0.5 | |
| 0 |
| Manganese (Mn), % | 0.2 to 0.5 | |
| 0 to 0.15 |
| Molybdenum (Mo), % | 0 | |
| 9.0 to 10.5 |
| Nickel (Ni), % | 0 to 0.050 | |
| 33 to 37 |
| Phosphorus (P), % | 0 | |
| 0 to 0.015 |
| Silicon (Si), % | 0 to 0.1 | |
| 0 to 0.15 |
| Sulfur (S), % | 0 | |
| 0 to 0.010 |
| Tin (Sn), % | 0 to 0.030 | |
| 0 |
| Titanium (Ti), % | 0 to 0.1 | |
| 0 to 1.0 |
| Zinc (Zn), % | 0 to 0.1 | |
| 0 |
| Residuals, % | 0 to 0.1 | |
| 0 |