7475 Aluminum vs. S20910 Stainless Steel
7475 aluminum belongs to the aluminum alloys classification, while S20910 stainless steel belongs to the iron alloys. There are 28 material properties with values for both materials. Properties with values for just one material (6, 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 7475 aluminum and the bottom bar is S20910 stainless steel.
Metric UnitsUS Customary Units
Mechanical Properties
| Elastic (Young's, Tensile) Modulus, GPa | 70 | |
| 200 |
| Elongation at Break, % | 10 to 12 | |
| 14 to 39 |
| Fatigue Strength, MPa | 190 to 210 | |
| 310 to 460 |
| Poisson's Ratio | 0.32 | |
| 0.28 |
| Shear Modulus, GPa | 26 | |
| 79 |
| Shear Strength, MPa | 320 to 350 | |
| 500 to 570 |
| Tensile Strength: Ultimate (UTS), MPa | 530 to 590 | |
| 780 to 940 |
| Tensile Strength: Yield (Proof), MPa | 440 to 520 | |
| 430 to 810 |
Thermal Properties
| Latent Heat of Fusion, J/g | 380 | |
| 300 |
| Maximum Temperature: Mechanical, °C | 180 | |
| 1080 |
| Melting Completion (Liquidus), °C | 640 | |
| 1420 |
| Melting Onset (Solidus), °C | 480 | |
| 1380 |
| Specific Heat Capacity, J/kg-K | 870 | |
| 480 |
| Thermal Conductivity, W/m-K | 140 to 160 | |
| 13 |
| Thermal Expansion, µm/m-K | 23 | |
| 16 |
Otherwise Unclassified Properties
| Base Metal Price, % relative | 10 | |
| 22 |
| Density, g/cm3 | 3.0 | |
| 7.8 |
| Embodied Carbon, kg CO2/kg material | 8.2 | |
| 4.8 |
| Embodied Energy, MJ/kg | 150 | |
| 68 |
| Embodied Water, L/kg | 1130 | |
| 180 |
Common Calculations
| Resilience: Ultimate (Unit Rupture Work), MJ/m3 | 53 to 68 | |
| 120 to 260 |
| Resilience: Unit (Modulus of Resilience), kJ/m3 | 1390 to 1920 | |
| 460 to 1640 |
| Stiffness to Weight: Axial, points | 13 | |
| 14 |
| Stiffness to Weight: Bending, points | 46 | |
| 25 |
| Strength to Weight: Axial, points | 49 to 55 | |
| 28 to 33 |
| Strength to Weight: Bending, points | 48 to 52 | |
| 24 to 27 |
| Thermal Diffusivity, mm2/s | 53 to 63 | |
| 3.6 |
| Thermal Shock Resistance, points | 23 to 26 | |
| 17 to 21 |
Alloy Composition
| Aluminum (Al), % | 88.6 to 91.6 | |
| 0 |
| Carbon (C), % | 0 | |
| 0 to 0.060 |
| Chromium (Cr), % | 0.18 to 0.25 | |
| 20.5 to 23.5 |
| Copper (Cu), % | 1.2 to 1.9 | |
| 0 |
| Iron (Fe), % | 0 to 0.12 | |
| 52.1 to 62.1 |
| Magnesium (Mg), % | 1.9 to 2.6 | |
| 0 |
| Manganese (Mn), % | 0 to 0.060 | |
| 4.0 to 6.0 |
| Molybdenum (Mo), % | 0 | |
| 1.5 to 3.0 |
| Nickel (Ni), % | 0 | |
| 11.5 to 13.5 |
| Niobium (Nb), % | 0 | |
| 0.1 to 0.3 |
| Nitrogen (N), % | 0 | |
| 0.2 to 0.4 |
| Phosphorus (P), % | 0 | |
| 0 to 0.040 |
| Silicon (Si), % | 0 to 0.1 | |
| 0 to 0.75 |
| Sulfur (S), % | 0 | |
| 0 to 0.030 |
| Titanium (Ti), % | 0 to 0.060 | |
| 0 |
| Vanadium (V), % | 0 | |
| 0.1 to 0.3 |
| Zinc (Zn), % | 5.1 to 6.2 | |
| 0 |
| Residuals, % | 0 to 0.15 | |
| 0 |