S20910 Stainless Steel vs. EN AC-21100 Aluminum
S20910 stainless steel belongs to the iron alloys classification, while EN AC-21100 aluminum belongs to the aluminum 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 S20910 stainless steel and the bottom bar is EN AC-21100 aluminum.
Metric UnitsUS Customary Units
Mechanical Properties
| Brinell Hardness | 230 to 290 | |
| 100 to 110 |
| Elastic (Young's, Tensile) Modulus, GPa | 200 | |
| 71 |
| Elongation at Break, % | 14 to 39 | |
| 6.2 to 7.3 |
| Fatigue Strength, MPa | 310 to 460 | |
| 79 to 87 |
| Poisson's Ratio | 0.28 | |
| 0.33 |
| Shear Modulus, GPa | 79 | |
| 27 |
| Tensile Strength: Ultimate (UTS), MPa | 780 to 940 | |
| 340 to 350 |
| Tensile Strength: Yield (Proof), MPa | 430 to 810 | |
| 210 to 240 |
Thermal Properties
| Latent Heat of Fusion, J/g | 300 | |
| 390 |
| Maximum Temperature: Mechanical, °C | 1080 | |
| 170 |
| Melting Completion (Liquidus), °C | 1420 | |
| 670 |
| Melting Onset (Solidus), °C | 1380 | |
| 550 |
| Specific Heat Capacity, J/kg-K | 480 | |
| 880 |
| Thermal Conductivity, W/m-K | 13 | |
| 130 |
| Thermal Expansion, µm/m-K | 16 | |
| 23 |
Otherwise Unclassified Properties
| Base Metal Price, % relative | 22 | |
| 11 |
| Density, g/cm3 | 7.8 | |
| 3.0 |
| Embodied Carbon, kg CO2/kg material | 4.8 | |
| 8.0 |
| Embodied Energy, MJ/kg | 68 | |
| 150 |
| Embodied Water, L/kg | 180 | |
| 1150 |
Common Calculations
| Resilience: Ultimate (Unit Rupture Work), MJ/m3 | 120 to 260 | |
| 19 to 21 |
| Resilience: Unit (Modulus of Resilience), kJ/m3 | 460 to 1640 | |
| 300 to 400 |
| Stiffness to Weight: Axial, points | 14 | |
| 13 |
| Stiffness to Weight: Bending, points | 25 | |
| 46 |
| Strength to Weight: Axial, points | 28 to 33 | |
| 31 to 33 |
| Strength to Weight: Bending, points | 24 to 27 | |
| 36 to 37 |
| Thermal Diffusivity, mm2/s | 3.6 | |
| 48 |
| Thermal Shock Resistance, points | 17 to 21 | |
| 15 |
Alloy Composition
| Aluminum (Al), % | 0 | |
| 93.4 to 95.7 |
| Carbon (C), % | 0 to 0.060 | |
| 0 |
| Chromium (Cr), % | 20.5 to 23.5 | |
| 0 |
| Copper (Cu), % | 0 | |
| 4.2 to 5.2 |
| Iron (Fe), % | 52.1 to 62.1 | |
| 0 to 0.19 |
| Manganese (Mn), % | 4.0 to 6.0 | |
| 0 to 0.55 |
| Molybdenum (Mo), % | 1.5 to 3.0 | |
| 0 |
| Nickel (Ni), % | 11.5 to 13.5 | |
| 0 |
| Niobium (Nb), % | 0.1 to 0.3 | |
| 0 |
| Nitrogen (N), % | 0.2 to 0.4 | |
| 0 |
| Phosphorus (P), % | 0 to 0.040 | |
| 0 |
| Silicon (Si), % | 0 to 0.75 | |
| 0 to 0.18 |
| Sulfur (S), % | 0 to 0.030 | |
| 0 |
| Titanium (Ti), % | 0 | |
| 0.15 to 0.3 |
| Vanadium (V), % | 0.1 to 0.3 | |
| 0 |
| Zinc (Zn), % | 0 | |
| 0 to 0.070 |
| Residuals, % | 0 | |
| 0 to 0.1 |