EN 1.4303 Stainless Steel vs. 5021 Aluminum
EN 1.4303 stainless steel belongs to the iron alloys classification, while 5021 aluminum belongs to the aluminum alloys. There are 30 material properties with values for both materials. Properties with values for just one material (4, 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 EN 1.4303 stainless steel and the bottom bar is 5021 aluminum.
Metric UnitsUS Customary Units
Mechanical Properties
| Elastic (Young's, Tensile) Modulus, GPa | 200 | |
| 68 |
| Elongation at Break, % | 13 to 49 | |
| 1.1 to 3.4 |
| Fatigue Strength, MPa | 220 to 320 | |
| 85 to 110 |
| Poisson's Ratio | 0.28 | |
| 0.33 |
| Shear Modulus, GPa | 77 | |
| 26 |
| Shear Strength, MPa | 420 to 540 | |
| 170 |
| Tensile Strength: Ultimate (UTS), MPa | 590 to 900 | |
| 300 to 310 |
| Tensile Strength: Yield (Proof), MPa | 230 to 560 | |
| 240 to 270 |
Thermal Properties
| Latent Heat of Fusion, J/g | 290 | |
| 400 |
| Maximum Temperature: Mechanical, °C | 940 | |
| 180 |
| Melting Completion (Liquidus), °C | 1420 | |
| 640 |
| Melting Onset (Solidus), °C | 1380 | |
| 590 |
| Specific Heat Capacity, J/kg-K | 480 | |
| 900 |
| Thermal Conductivity, W/m-K | 15 | |
| 140 |
| Thermal Expansion, µm/m-K | 16 | |
| 23 |
Electrical Properties
| Electrical Conductivity: Equal Volume, % IACS | 2.4 | |
| 35 |
| Electrical Conductivity: Equal Weight (Specific), % IACS | 2.7 | |
| 120 |
Otherwise Unclassified Properties
| Base Metal Price, % relative | 17 | |
| 9.5 |
| Density, g/cm3 | 7.8 | |
| 2.7 |
| Embodied Carbon, kg CO2/kg material | 3.2 | |
| 8.6 |
| Embodied Energy, MJ/kg | 46 | |
| 150 |
| Embodied Water, L/kg | 150 | |
| 1180 |
Common Calculations
| Resilience: Ultimate (Unit Rupture Work), MJ/m3 | 110 to 230 | |
| 3.1 to 10 |
| Resilience: Unit (Modulus of Resilience), kJ/m3 | 140 to 800 | |
| 440 to 550 |
| Stiffness to Weight: Axial, points | 14 | |
| 14 |
| Stiffness to Weight: Bending, points | 25 | |
| 50 |
| Strength to Weight: Axial, points | 21 to 32 | |
| 30 to 32 |
| Strength to Weight: Bending, points | 20 to 26 | |
| 37 |
| Thermal Diffusivity, mm2/s | 4.0 | |
| 57 |
| Thermal Shock Resistance, points | 13 to 20 | |
| 13 to 14 |
Alloy Composition
| Aluminum (Al), % | 0 | |
| 95.2 to 97.7 |
| Carbon (C), % | 0 to 0.060 | |
| 0 |
| Chromium (Cr), % | 17 to 19 | |
| 0 to 0.15 |
| Copper (Cu), % | 0 | |
| 0 to 0.15 |
| Iron (Fe), % | 64.8 to 72 | |
| 0 to 0.5 |
| Magnesium (Mg), % | 0 | |
| 2.2 to 2.8 |
| Manganese (Mn), % | 0 to 2.0 | |
| 0.1 to 0.5 |
| Nickel (Ni), % | 11 to 13 | |
| 0 |
| Nitrogen (N), % | 0 to 0.1 | |
| 0 |
| Phosphorus (P), % | 0 to 0.045 | |
| 0 |
| Silicon (Si), % | 0 to 1.0 | |
| 0 to 0.4 |
| Sulfur (S), % | 0 to 0.015 | |
| 0 |
| Zinc (Zn), % | 0 | |
| 0 to 0.15 |
| Residuals, % | 0 | |
| 0 to 0.15 |