EN 1.4938 Stainless Steel vs. 7022 Aluminum
EN 1.4938 stainless steel belongs to the iron alloys classification, while 7022 aluminum belongs to the aluminum 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 EN 1.4938 stainless steel and the bottom bar is 7022 aluminum.
Metric UnitsUS Customary Units
Mechanical Properties
| Elastic (Young's, Tensile) Modulus, GPa | 200 | |
| 70 |
| Elongation at Break, % | 16 to 17 | |
| 6.3 to 8.0 |
| Fatigue Strength, MPa | 390 to 520 | |
| 140 to 170 |
| Poisson's Ratio | 0.28 | |
| 0.32 |
| Shear Modulus, GPa | 76 | |
| 26 |
| Shear Strength, MPa | 540 to 630 | |
| 290 to 320 |
| Tensile Strength: Ultimate (UTS), MPa | 870 to 1030 | |
| 490 to 540 |
| Tensile Strength: Yield (Proof), MPa | 640 to 870 | |
| 390 to 460 |
Thermal Properties
| Latent Heat of Fusion, J/g | 270 | |
| 380 |
| Maximum Temperature: Mechanical, °C | 750 | |
| 200 |
| Melting Completion (Liquidus), °C | 1460 | |
| 640 |
| Melting Onset (Solidus), °C | 1420 | |
| 480 |
| Specific Heat Capacity, J/kg-K | 470 | |
| 870 |
| Thermal Conductivity, W/m-K | 30 | |
| 140 |
| Thermal Expansion, µm/m-K | 11 | |
| 24 |
Electrical Properties
| Electrical Conductivity: Equal Volume, % IACS | 2.9 | |
| 21 |
| Electrical Conductivity: Equal Weight (Specific), % IACS | 3.3 | |
| 65 |
Otherwise Unclassified Properties
| Base Metal Price, % relative | 10 | |
| 10 |
| Density, g/cm3 | 7.8 | |
| 2.9 |
| Embodied Carbon, kg CO2/kg material | 3.3 | |
| 8.5 |
| Embodied Energy, MJ/kg | 47 | |
| 150 |
| Embodied Water, L/kg | 110 | |
| 1130 |
Common Calculations
| Resilience: Ultimate (Unit Rupture Work), MJ/m3 | 140 to 160 | |
| 29 to 40 |
| Resilience: Unit (Modulus of Resilience), kJ/m3 | 1050 to 1920 | |
| 1100 to 1500 |
| Stiffness to Weight: Axial, points | 14 | |
| 13 |
| Stiffness to Weight: Bending, points | 25 | |
| 47 |
| Strength to Weight: Axial, points | 31 to 37 | |
| 47 to 51 |
| Strength to Weight: Bending, points | 26 to 29 | |
| 47 to 50 |
| Thermal Diffusivity, mm2/s | 8.1 | |
| 54 |
| Thermal Shock Resistance, points | 30 to 35 | |
| 21 to 23 |
Alloy Composition
| Aluminum (Al), % | 0 | |
| 87.9 to 92.4 |
| Carbon (C), % | 0.080 to 0.15 | |
| 0 |
| Chromium (Cr), % | 11 to 12.5 | |
| 0.1 to 0.3 |
| Copper (Cu), % | 0 | |
| 0.5 to 1.0 |
| Iron (Fe), % | 80.5 to 84.8 | |
| 0 to 0.5 |
| Magnesium (Mg), % | 0 | |
| 2.6 to 3.7 |
| Manganese (Mn), % | 0.4 to 0.9 | |
| 0.1 to 0.4 |
| Molybdenum (Mo), % | 1.5 to 2.0 | |
| 0 |
| Nickel (Ni), % | 2.0 to 3.0 | |
| 0 |
| Nitrogen (N), % | 0.020 to 0.040 | |
| 0 |
| Phosphorus (P), % | 0 to 0.025 | |
| 0 |
| Silicon (Si), % | 0 to 0.5 | |
| 0 to 0.5 |
| Sulfur (S), % | 0 to 0.015 | |
| 0 |
| Titanium (Ti), % | 0 | |
| 0 to 0.2 |
| Vanadium (V), % | 0.25 to 0.4 | |
| 0 |
| Zinc (Zn), % | 0 | |
| 4.3 to 5.2 |
| Zirconium (Zr), % | 0 | |
| 0 to 0.2 |
| Residuals, % | 0 | |
| 0 to 0.15 |