238.0 Aluminum vs. B390.0 Aluminum
Both 238.0 aluminum and B390.0 aluminum are aluminum alloys. Both are furnished in the as-fabricated (no temper or treatment) condition. They have 86% of their average alloy composition in common.
For each property being compared, the top bar is 238.0 aluminum and the bottom bar is B390.0 aluminum.
Metric UnitsUS Customary Units
Mechanical Properties
| Elastic (Young's, Tensile) Modulus, GPa | 76 | |
| 76 |
| Elongation at Break, % | 1.5 | |
| 0.88 |
| Fatigue Strength, MPa | 110 | |
| 170 |
| Poisson's Ratio | 0.33 | |
| 0.33 |
| Shear Modulus, GPa | 28 | |
| 29 |
| Tensile Strength: Ultimate (UTS), MPa | 210 | |
| 320 |
| Tensile Strength: Yield (Proof), MPa | 170 | |
| 250 |
Thermal Properties
| Latent Heat of Fusion, J/g | 430 | |
| 640 |
| Maximum Temperature: Mechanical, °C | 170 | |
| 170 |
| Melting Completion (Liquidus), °C | 600 | |
| 580 |
| Melting Onset (Solidus), °C | 510 | |
| 580 |
| Specific Heat Capacity, J/kg-K | 840 | |
| 880 |
| Thermal Conductivity, W/m-K | 100 | |
| 130 |
| Thermal Expansion, µm/m-K | 21 | |
| 20 |
Electrical Properties
| Electrical Conductivity: Equal Volume, % IACS | 25 | |
| 27 |
| Electrical Conductivity: Equal Weight (Specific), % IACS | 67 | |
| 88 |
Otherwise Unclassified Properties
| Base Metal Price, % relative | 12 | |
| 11 |
| Density, g/cm3 | 3.4 | |
| 2.8 |
| Embodied Carbon, kg CO2/kg material | 7.4 | |
| 7.3 |
| Embodied Energy, MJ/kg | 140 | |
| 130 |
| Embodied Water, L/kg | 1040 | |
| 940 |
Common Calculations
| Resilience: Ultimate (Unit Rupture Work), MJ/m3 | 2.9 | |
| 2.6 |
| Resilience: Unit (Modulus of Resilience), kJ/m3 | 180 | |
| 410 |
| Stiffness to Weight: Axial, points | 12 | |
| 15 |
| Stiffness to Weight: Bending, points | 42 | |
| 51 |
| Strength to Weight: Axial, points | 17 | |
| 32 |
| Strength to Weight: Bending, points | 23 | |
| 38 |
| Thermal Diffusivity, mm2/s | 37 | |
| 55 |
| Thermal Shock Resistance, points | 9.1 | |
| 15 |
Alloy Composition
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| Aluminum (Al), % | 81.9 to 84.9 | |
| 72.7 to 79.6 |
| Copper (Cu), % | 9.5 to 10.5 | |
| 4.0 to 5.0 |
| Iron (Fe), % | 1.0 to 1.5 | |
| 0 to 1.3 |
| Magnesium (Mg), % | 0 to 0.25 | |
| 0.45 to 0.65 |
| Manganese (Mn), % | 0 | |
| 0 to 0.5 |
| Nickel (Ni), % | 0 | |
| 0 to 0.1 |
| Silicon (Si), % | 3.6 to 4.4 | |
| 16 to 18 |
| Titanium (Ti), % | 0 | |
| 0 to 0.1 |
| Zinc (Zn), % | 1.0 to 1.5 | |
| 0 to 1.5 |
| Residuals, % | 0 | |
| 0 to 0.2 |