EN AC-42100 Aluminum vs. EN AC-21100 Aluminum
Both EN AC-42100 aluminum and EN AC-21100 aluminum are aluminum alloys. They have a moderately high 93% of their average alloy composition in common.
For each property being compared, the top bar is EN AC-42100 aluminum and the bottom bar is EN AC-21100 aluminum.
Metric UnitsUS Customary Units
Mechanical Properties
| Brinell Hardness | 91 | |
| 100 to 110 |
| Elastic (Young's, Tensile) Modulus, GPa | 70 | |
| 71 |
| Elongation at Break, % | 3.4 to 9.0 | |
| 6.2 to 7.3 |
| Fatigue Strength, MPa | 76 to 82 | |
| 79 to 87 |
| Poisson's Ratio | 0.33 | |
| 0.33 |
| Shear Modulus, GPa | 26 | |
| 27 |
| Tensile Strength: Ultimate (UTS), MPa | 280 to 290 | |
| 340 to 350 |
| Tensile Strength: Yield (Proof), MPa | 210 to 230 | |
| 210 to 240 |
Thermal Properties
| Latent Heat of Fusion, J/g | 500 | |
| 390 |
| Maximum Temperature: Mechanical, °C | 170 | |
| 170 |
| Melting Completion (Liquidus), °C | 610 | |
| 670 |
| Melting Onset (Solidus), °C | 600 | |
| 550 |
| Specific Heat Capacity, J/kg-K | 910 | |
| 880 |
| Thermal Conductivity, W/m-K | 150 | |
| 130 |
| Thermal Expansion, µm/m-K | 22 | |
| 23 |
Electrical Properties
| Electrical Conductivity: Equal Volume, % IACS | 41 | |
| 34 |
| Electrical Conductivity: Equal Weight (Specific), % IACS | 140 | |
| 100 |
Otherwise Unclassified Properties
| Base Metal Price, % relative | 9.5 | |
| 11 |
| Density, g/cm3 | 2.6 | |
| 3.0 |
| Embodied Carbon, kg CO2/kg material | 8.0 | |
| 8.0 |
| Embodied Energy, MJ/kg | 150 | |
| 150 |
| Embodied Water, L/kg | 1110 | |
| 1150 |
Common Calculations
| Resilience: Ultimate (Unit Rupture Work), MJ/m3 | 9.1 to 23 | |
| 19 to 21 |
| Resilience: Unit (Modulus of Resilience), kJ/m3 | 300 to 370 | |
| 300 to 400 |
| Stiffness to Weight: Axial, points | 15 | |
| 13 |
| Stiffness to Weight: Bending, points | 53 | |
| 46 |
| Strength to Weight: Axial, points | 30 to 31 | |
| 31 to 33 |
| Strength to Weight: Bending, points | 37 to 38 | |
| 36 to 37 |
| Thermal Diffusivity, mm2/s | 66 | |
| 48 |
| Thermal Shock Resistance, points | 13 | |
| 15 |
Alloy Composition
| Aluminum (Al), % | 91.3 to 93.3 | |
| 93.4 to 95.7 |
| Copper (Cu), % | 0 to 0.050 | |
| 4.2 to 5.2 |
| Iron (Fe), % | 0 to 0.19 | |
| 0 to 0.19 |
| Magnesium (Mg), % | 0.25 to 0.45 | |
| 0 |
| Manganese (Mn), % | 0 to 0.1 | |
| 0 to 0.55 |
| Silicon (Si), % | 6.5 to 7.5 | |
| 0 to 0.18 |
| Titanium (Ti), % | 0 to 0.25 | |
| 0.15 to 0.3 |
| Zinc (Zn), % | 0 to 0.070 | |
| 0 to 0.070 |
| Residuals, % | 0 | |
| 0 to 0.1 |