390.0 Aluminum vs. SAE-AISI 1140 Steel
390.0 aluminum belongs to the aluminum alloys classification, while SAE-AISI 1140 steel belongs to the iron alloys. There are 30 material properties with values for both materials. Properties with values for just one material (2, 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 390.0 aluminum and the bottom bar is SAE-AISI 1140 steel.
Metric UnitsUS Customary Units
Mechanical Properties
| Brinell Hardness | 120 | |
| 170 to 180 |
| Elastic (Young's, Tensile) Modulus, GPa | 75 | |
| 190 |
| Elongation at Break, % | 1.0 | |
| 14 to 18 |
| Fatigue Strength, MPa | 76 to 110 | |
| 230 to 370 |
| Poisson's Ratio | 0.33 | |
| 0.29 |
| Shear Modulus, GPa | 28 | |
| 72 |
| Tensile Strength: Ultimate (UTS), MPa | 280 to 300 | |
| 600 to 700 |
| Tensile Strength: Yield (Proof), MPa | 240 to 270 | |
| 340 to 570 |
Thermal Properties
| Latent Heat of Fusion, J/g | 640 | |
| 250 |
| Maximum Temperature: Mechanical, °C | 170 | |
| 400 |
| Melting Completion (Liquidus), °C | 650 | |
| 1460 |
| Melting Onset (Solidus), °C | 560 | |
| 1420 |
| Specific Heat Capacity, J/kg-K | 880 | |
| 470 |
| Thermal Conductivity, W/m-K | 130 | |
| 51 |
| Thermal Expansion, µm/m-K | 18 | |
| 13 |
Electrical Properties
| Electrical Conductivity: Equal Volume, % IACS | 24 to 25 | |
| 7.0 |
| Electrical Conductivity: Equal Weight (Specific), % IACS | 79 to 83 | |
| 8.1 |
Otherwise Unclassified Properties
| Base Metal Price, % relative | 11 | |
| 1.8 |
| Density, g/cm3 | 2.7 | |
| 7.8 |
| Embodied Carbon, kg CO2/kg material | 7.3 | |
| 1.4 |
| Embodied Energy, MJ/kg | 130 | |
| 18 |
| Embodied Water, L/kg | 950 | |
| 46 |
Common Calculations
| Resilience: Ultimate (Unit Rupture Work), MJ/m3 | 2.7 to 2.9 | |
| 89 to 93 |
| Resilience: Unit (Modulus of Resilience), kJ/m3 | 380 to 470 | |
| 310 to 870 |
| Stiffness to Weight: Axial, points | 15 | |
| 13 |
| Stiffness to Weight: Bending, points | 52 | |
| 24 |
| Strength to Weight: Axial, points | 28 to 30 | |
| 21 to 25 |
| Strength to Weight: Bending, points | 35 to 36 | |
| 20 to 22 |
| Thermal Diffusivity, mm2/s | 56 | |
| 14 |
| Thermal Shock Resistance, points | 14 to 15 | |
| 18 to 21 |
Alloy Composition
| Aluminum (Al), % | 74.5 to 79.6 | |
| 0 |
| Carbon (C), % | 0 | |
| 0.37 to 0.44 |
| Copper (Cu), % | 4.0 to 5.0 | |
| 0 |
| Iron (Fe), % | 0 to 1.3 | |
| 98.4 to 98.9 |
| Magnesium (Mg), % | 0.45 to 0.65 | |
| 0 |
| Manganese (Mn), % | 0 to 0.1 | |
| 0.7 to 1.0 |
| Phosphorus (P), % | 0 | |
| 0 to 0.040 |
| Silicon (Si), % | 16 to 18 | |
| 0 |
| Sulfur (S), % | 0 | |
| 0.080 to 0.13 |
| Titanium (Ti), % | 0 to 0.2 | |
| 0 |
| Zinc (Zn), % | 0 to 0.1 | |
| 0 |
| Residuals, % | 0 to 0.2 | |
| 0 |