7175 Aluminum vs. EN 1.4655 Stainless Steel
7175 aluminum belongs to the aluminum alloys classification, while EN 1.4655 stainless steel belongs to the iron 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 7175 aluminum and the bottom bar is EN 1.4655 stainless steel.
Metric UnitsUS Customary Units
Mechanical Properties
| Elastic (Young's, Tensile) Modulus, GPa | 70 | |
| 200 |
| Elongation at Break, % | 3.8 to 5.9 | |
| 23 to 25 |
| Fatigue Strength, MPa | 150 to 180 | |
| 320 |
| Poisson's Ratio | 0.32 | |
| 0.27 |
| Shear Modulus, GPa | 26 | |
| 78 |
| Shear Strength, MPa | 290 to 330 | |
| 460 |
| Tensile Strength: Ultimate (UTS), MPa | 520 to 570 | |
| 720 to 730 |
| Tensile Strength: Yield (Proof), MPa | 430 to 490 | |
| 450 to 480 |
Thermal Properties
| Latent Heat of Fusion, J/g | 380 | |
| 290 |
| Maximum Temperature: Mechanical, °C | 180 | |
| 1050 |
| Melting Completion (Liquidus), °C | 640 | |
| 1420 |
| Melting Onset (Solidus), °C | 480 | |
| 1370 |
| Specific Heat Capacity, J/kg-K | 870 | |
| 480 |
| Thermal Conductivity, W/m-K | 140 | |
| 15 |
| Thermal Expansion, µm/m-K | 23 | |
| 13 |
Electrical Properties
| Electrical Conductivity: Equal Volume, % IACS | 33 | |
| 2.2 |
| Electrical Conductivity: Equal Weight (Specific), % IACS | 99 | |
| 2.5 |
Otherwise Unclassified Properties
| Base Metal Price, % relative | 10 | |
| 15 |
| Density, g/cm3 | 3.0 | |
| 7.7 |
| Embodied Carbon, kg CO2/kg material | 8.2 | |
| 2.9 |
| Embodied Energy, MJ/kg | 150 | |
| 41 |
| Embodied Water, L/kg | 1130 | |
| 160 |
Common Calculations
| Resilience: Ultimate (Unit Rupture Work), MJ/m3 | 18 to 29 | |
| 150 to 160 |
| Resilience: Unit (Modulus of Resilience), kJ/m3 | 1310 to 1730 | |
| 510 to 580 |
| Stiffness to Weight: Axial, points | 13 | |
| 14 |
| Stiffness to Weight: Bending, points | 46 | |
| 25 |
| Strength to Weight: Axial, points | 48 to 52 | |
| 26 |
| Strength to Weight: Bending, points | 48 to 51 | |
| 23 |
| Thermal Diffusivity, mm2/s | 53 | |
| 4.0 |
| Thermal Shock Resistance, points | 23 to 25 | |
| 20 |
Alloy Composition
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| Aluminum (Al), % | 88 to 91.4 | |
| 0 |
| Carbon (C), % | 0 | |
| 0 to 0.030 |
| Chromium (Cr), % | 0.18 to 0.28 | |
| 22 to 24 |
| Copper (Cu), % | 1.2 to 2.0 | |
| 1.0 to 3.0 |
| Iron (Fe), % | 0 to 0.2 | |
| 63.6 to 73.4 |
| Magnesium (Mg), % | 2.1 to 2.9 | |
| 0 |
| Manganese (Mn), % | 0 to 0.1 | |
| 0 to 2.0 |
| Molybdenum (Mo), % | 0 | |
| 0.1 to 0.6 |
| Nickel (Ni), % | 0 | |
| 3.5 to 5.5 |
| Nitrogen (N), % | 0 | |
| 0.050 to 0.2 |
| Phosphorus (P), % | 0 | |
| 0 to 0.035 |
| Silicon (Si), % | 0 to 0.15 | |
| 0 to 1.0 |
| Sulfur (S), % | 0 | |
| 0 to 0.015 |
| Titanium (Ti), % | 0 to 0.1 | |
| 0 |
| Zinc (Zn), % | 5.1 to 6.1 | |
| 0 |
| Residuals, % | 0 to 0.15 | |
| 0 |