355.0 Aluminum vs. SAE-AISI 4320 Steel
355.0 aluminum belongs to the aluminum alloys classification, while SAE-AISI 4320 steel belongs to the iron alloys. There are 31 material properties with values for both materials. Properties with values for just one material (1, 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 355.0 aluminum and the bottom bar is SAE-AISI 4320 steel.
Metric UnitsUS Customary Units
Mechanical Properties
| Brinell Hardness | 72 to 83 | |
| 160 to 240 |
| Elastic (Young's, Tensile) Modulus, GPa | 71 | |
| 190 |
| Elongation at Break, % | 1.5 to 2.6 | |
| 21 to 29 |
| Fatigue Strength, MPa | 55 to 70 | |
| 320 |
| Poisson's Ratio | 0.33 | |
| 0.29 |
| Shear Modulus, GPa | 27 | |
| 73 |
| Shear Strength, MPa | 150 to 240 | |
| 370 to 500 |
| Tensile Strength: Ultimate (UTS), MPa | 200 to 260 | |
| 570 to 790 |
| Tensile Strength: Yield (Proof), MPa | 150 to 190 | |
| 430 to 460 |
Thermal Properties
| Latent Heat of Fusion, J/g | 470 | |
| 250 |
| Maximum Temperature: Mechanical, °C | 180 | |
| 420 |
| Melting Completion (Liquidus), °C | 620 | |
| 1460 |
| Melting Onset (Solidus), °C | 560 | |
| 1420 |
| Specific Heat Capacity, J/kg-K | 890 | |
| 470 |
| Thermal Conductivity, W/m-K | 150 to 170 | |
| 46 |
| Thermal Expansion, µm/m-K | 22 | |
| 11 |
Electrical Properties
| Electrical Conductivity: Equal Volume, % IACS | 38 to 43 | |
| 7.4 |
| Electrical Conductivity: Equal Weight (Specific), % IACS | 120 to 140 | |
| 8.5 |
Otherwise Unclassified Properties
| Base Metal Price, % relative | 9.5 | |
| 3.4 |
| Density, g/cm3 | 2.7 | |
| 7.9 |
| Embodied Carbon, kg CO2/kg material | 8.0 | |
| 1.7 |
| Embodied Energy, MJ/kg | 150 | |
| 22 |
| Embodied Water, L/kg | 1120 | |
| 52 |
Common Calculations
| Resilience: Ultimate (Unit Rupture Work), MJ/m3 | 2.7 to 5.9 | |
| 140 to 150 |
| Resilience: Unit (Modulus of Resilience), kJ/m3 | 150 to 250 | |
| 480 to 560 |
| Stiffness to Weight: Axial, points | 14 | |
| 13 |
| Stiffness to Weight: Bending, points | 51 | |
| 24 |
| Strength to Weight: Axial, points | 20 to 27 | |
| 20 to 28 |
| Strength to Weight: Bending, points | 28 to 33 | |
| 19 to 24 |
| Thermal Diffusivity, mm2/s | 60 to 69 | |
| 13 |
| Thermal Shock Resistance, points | 9.1 to 12 | |
| 19 to 27 |
Alloy Composition
| Aluminum (Al), % | 90.3 to 94.1 | |
| 0 |
| Carbon (C), % | 0 | |
| 0.17 to 0.22 |
| Chromium (Cr), % | 0 to 0.25 | |
| 0.4 to 0.6 |
| Copper (Cu), % | 1.0 to 1.5 | |
| 0 |
| Iron (Fe), % | 0 to 0.6 | |
| 95.8 to 97 |
| Magnesium (Mg), % | 0.4 to 0.6 | |
| 0 |
| Manganese (Mn), % | 0 to 0.5 | |
| 0.45 to 0.65 |
| Molybdenum (Mo), % | 0 | |
| 0.2 to 0.3 |
| Nickel (Ni), % | 0 | |
| 1.7 to 2.0 |
| Phosphorus (P), % | 0 | |
| 0 to 0.035 |
| Silicon (Si), % | 4.5 to 5.5 | |
| 0.15 to 0.35 |
| Sulfur (S), % | 0 | |
| 0 to 0.040 |
| Titanium (Ti), % | 0 to 0.25 | |
| 0 |
| Zinc (Zn), % | 0 to 0.35 | |
| 0 |
| Residuals, % | 0 to 0.15 | |
| 0 |