7175 Aluminum vs. EN 1.4020 Stainless Steel
7175 aluminum belongs to the aluminum alloys classification, while EN 1.4020 stainless steel belongs to the iron alloys. There are 26 material properties with values for both materials. Properties with values for just one material (7, 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 7175 aluminum and the bottom bar is EN 1.4020 stainless steel.
Metric UnitsUS Customary Units
Mechanical Properties
| Elastic (Young's, Tensile) Modulus, GPa | 70 | |
| 200 |
| Elongation at Break, % | 3.8 to 5.9 | |
| 13 to 34 |
| Fatigue Strength, MPa | 150 to 180 | |
| 340 to 540 |
| Poisson's Ratio | 0.32 | |
| 0.28 |
| Shear Modulus, GPa | 26 | |
| 77 |
| Shear Strength, MPa | 290 to 330 | |
| 510 to 680 |
| Tensile Strength: Ultimate (UTS), MPa | 520 to 570 | |
| 770 to 1130 |
| Tensile Strength: Yield (Proof), MPa | 430 to 490 | |
| 430 to 950 |
Thermal Properties
| Latent Heat of Fusion, J/g | 380 | |
| 280 |
| Maximum Temperature: Mechanical, °C | 180 | |
| 890 |
| Melting Completion (Liquidus), °C | 640 | |
| 1390 |
| Melting Onset (Solidus), °C | 480 | |
| 1350 |
| Specific Heat Capacity, J/kg-K | 870 | |
| 480 |
| Thermal Expansion, µm/m-K | 23 | |
| 17 |
Otherwise Unclassified Properties
| Base Metal Price, % relative | 10 | |
| 11 |
| Density, g/cm3 | 3.0 | |
| 7.6 |
| Embodied Carbon, kg CO2/kg material | 8.2 | |
| 2.5 |
| Embodied Energy, MJ/kg | 150 | |
| 37 |
| Embodied Water, L/kg | 1130 | |
| 150 |
Common Calculations
| Resilience: Ultimate (Unit Rupture Work), MJ/m3 | 18 to 29 | |
| 140 to 220 |
| Resilience: Unit (Modulus of Resilience), kJ/m3 | 1310 to 1730 | |
| 460 to 2290 |
| Stiffness to Weight: Axial, points | 13 | |
| 14 |
| Stiffness to Weight: Bending, points | 46 | |
| 25 |
| Strength to Weight: Axial, points | 48 to 52 | |
| 28 to 41 |
| Strength to Weight: Bending, points | 48 to 51 | |
| 25 to 32 |
| Thermal Shock Resistance, points | 23 to 25 | |
| 16 to 23 |
Alloy Composition
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| Aluminum (Al), % | 88 to 91.4 | |
| 0 |
| Carbon (C), % | 0 | |
| 0 to 0.15 |
| Chromium (Cr), % | 0.18 to 0.28 | |
| 16.5 to 19 |
| Copper (Cu), % | 1.2 to 2.0 | |
| 0 |
| Iron (Fe), % | 0 to 0.2 | |
| 62.8 to 71.8 |
| Magnesium (Mg), % | 2.1 to 2.9 | |
| 0 |
| Manganese (Mn), % | 0 to 0.1 | |
| 11 to 14 |
| Nickel (Ni), % | 0 | |
| 0.5 to 2.5 |
| Nitrogen (N), % | 0 | |
| 0.2 to 0.45 |
| Phosphorus (P), % | 0 | |
| 0 to 0.045 |
| Silicon (Si), % | 0 to 0.15 | |
| 0 to 1.0 |
| Sulfur (S), % | 0 | |
| 0 to 0.030 |
| Titanium (Ti), % | 0 to 0.1 | |
| 0 |
| Zinc (Zn), % | 5.1 to 6.1 | |
| 0 |
| Residuals, % | 0 to 0.15 | |
| 0 |