2117 Aluminum vs. EN-MC21220 Magnesium
2117 aluminum belongs to the aluminum alloys classification, while EN-MC21220 magnesium belongs to the magnesium alloys.
For each property being compared, the top bar is 2117 aluminum and the bottom bar is EN-MC21220 magnesium.
Metric UnitsUS Customary Units
Mechanical Properties
| Brinell Hardness | 70 | |
| 58 |
| Elastic (Young's, Tensile) Modulus, GPa | 71 | |
| 45 |
| Elongation at Break, % | 26 | |
| 11 |
| Fatigue Strength, MPa | 95 | |
| 89 |
| Poisson's Ratio | 0.33 | |
| 0.29 |
| Shear Modulus, GPa | 27 | |
| 17 |
| Shear Strength, MPa | 200 | |
| 120 |
| Tensile Strength: Ultimate (UTS), MPa | 300 | |
| 210 |
| Tensile Strength: Yield (Proof), MPa | 170 | |
| 120 |
Thermal Properties
| Latent Heat of Fusion, J/g | 400 | |
| 350 |
| Maximum Temperature: Mechanical, °C | 220 | |
| 120 |
| Melting Completion (Liquidus), °C | 650 | |
| 600 |
| Melting Onset (Solidus), °C | 550 | |
| 540 |
| Specific Heat Capacity, J/kg-K | 880 | |
| 1000 |
| Thermal Conductivity, W/m-K | 150 | |
| 65 |
| Thermal Expansion, µm/m-K | 24 | |
| 27 |
Electrical Properties
| Electrical Conductivity: Equal Volume, % IACS | 40 | |
| 16 |
| Electrical Conductivity: Equal Weight (Specific), % IACS | 120 | |
| 87 |
Otherwise Unclassified Properties
| Base Metal Price, % relative | 10 | |
| 12 |
| Density, g/cm3 | 3.0 | |
| 1.7 |
| Embodied Carbon, kg CO2/kg material | 8.2 | |
| 23 |
| Embodied Energy, MJ/kg | 150 | |
| 160 |
| Embodied Water, L/kg | 1150 | |
| 990 |
Common Calculations
| Resilience: Ultimate (Unit Rupture Work), MJ/m3 | 64 | |
| 20 |
| Resilience: Unit (Modulus of Resilience), kJ/m3 | 190 | |
| 160 |
| Stiffness to Weight: Axial, points | 13 | |
| 15 |
| Stiffness to Weight: Bending, points | 47 | |
| 71 |
| Strength to Weight: Axial, points | 28 | |
| 34 |
| Strength to Weight: Bending, points | 33 | |
| 46 |
| Thermal Diffusivity, mm2/s | 59 | |
| 39 |
| Thermal Shock Resistance, points | 12 | |
| 12 |
Alloy Composition
| Aluminum (Al), % | 91 to 97.6 | |
| 4.4 to 5.5 |
| Chromium (Cr), % | 0 to 0.1 | |
| 0 |
| Copper (Cu), % | 2.2 to 4.5 | |
| 0 to 0.010 |
| Iron (Fe), % | 0 to 0.7 | |
| 0 to 0.0050 |
| Magnesium (Mg), % | 0.2 to 1.0 | |
| 93.5 to 95.5 |
| Manganese (Mn), % | 0.4 to 1.0 | |
| 0.1 to 0.6 |
| Nickel (Ni), % | 0 | |
| 0 to 0.0020 |
| Silicon (Si), % | 0.2 to 0.8 | |
| 0 to 0.1 |
| Titanium (Ti), % | 0 to 0.25 | |
| 0 |
| Zinc (Zn), % | 0 to 0.25 | |
| 0 to 0.3 |
| Zirconium (Zr), % | 0 to 0.25 | |
| 0 |
| Residuals, % | 0 | |
| 0 to 0.010 |