SAE-AISI D2 Steel vs. 7020 Aluminum
SAE-AISI D2 steel belongs to the iron alloys classification, while 7020 aluminum belongs to the aluminum alloys. There are 29 material properties with values for both materials. Properties with values for just one material (3, 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 SAE-AISI D2 steel and the bottom bar is 7020 aluminum.
Metric UnitsUS Customary Units
Mechanical Properties
| Elastic (Young's, Tensile) Modulus, GPa | 190 | |
| 70 |
| Elongation at Break, % | 5.0 to 16 | |
| 8.4 to 14 |
| Fatigue Strength, MPa | 310 to 860 | |
| 110 to 130 |
| Poisson's Ratio | 0.28 | |
| 0.33 |
| Shear Modulus, GPa | 75 | |
| 26 |
| Shear Strength, MPa | 460 to 1160 | |
| 110 to 230 |
| Tensile Strength: Ultimate (UTS), MPa | 760 to 2000 | |
| 190 to 390 |
| Tensile Strength: Yield (Proof), MPa | 470 to 1510 | |
| 120 to 310 |
Thermal Properties
| Latent Heat of Fusion, J/g | 270 | |
| 380 |
| Melting Completion (Liquidus), °C | 1440 | |
| 650 |
| Melting Onset (Solidus), °C | 1390 | |
| 610 |
| Specific Heat Capacity, J/kg-K | 480 | |
| 880 |
| Thermal Conductivity, W/m-K | 31 | |
| 150 |
| Thermal Expansion, µm/m-K | 11 | |
| 23 |
Electrical Properties
| Electrical Conductivity: Equal Volume, % IACS | 4.3 | |
| 39 |
| Electrical Conductivity: Equal Weight (Specific), % IACS | 5.1 | |
| 120 |
Otherwise Unclassified Properties
| Base Metal Price, % relative | 8.0 | |
| 9.5 |
| Density, g/cm3 | 7.7 | |
| 2.9 |
| Embodied Carbon, kg CO2/kg material | 3.4 | |
| 8.3 |
| Embodied Energy, MJ/kg | 50 | |
| 150 |
| Embodied Water, L/kg | 100 | |
| 1150 |
Common Calculations
| Resilience: Ultimate (Unit Rupture Work), MJ/m3 | 92 to 100 | |
| 23 to 46 |
| Resilience: Unit (Modulus of Resilience), kJ/m3 | 570 to 5940 | |
| 110 to 690 |
| Stiffness to Weight: Axial, points | 14 | |
| 13 |
| Stiffness to Weight: Bending, points | 25 | |
| 47 |
| Strength to Weight: Axial, points | 27 to 72 | |
| 18 to 37 |
| Strength to Weight: Bending, points | 24 to 46 | |
| 25 to 41 |
| Thermal Diffusivity, mm2/s | 8.3 | |
| 59 |
| Thermal Shock Resistance, points | 25 to 67 | |
| 8.3 to 17 |
Alloy Composition
| Aluminum (Al), % | 0 | |
| 91.2 to 94.8 |
| Carbon (C), % | 1.4 to 1.6 | |
| 0 |
| Chromium (Cr), % | 11 to 13 | |
| 0.1 to 0.35 |
| Copper (Cu), % | 0 to 0.25 | |
| 0 to 0.2 |
| Iron (Fe), % | 81.3 to 86.9 | |
| 0 to 0.4 |
| Magnesium (Mg), % | 0 | |
| 1.0 to 1.4 |
| Manganese (Mn), % | 0 to 0.6 | |
| 0.050 to 0.5 |
| Molybdenum (Mo), % | 0.7 to 1.2 | |
| 0 |
| Nickel (Ni), % | 0 to 0.3 | |
| 0 |
| Phosphorus (P), % | 0 to 0.030 | |
| 0 |
| Silicon (Si), % | 0 to 0.6 | |
| 0 to 0.35 |
| Sulfur (S), % | 0 to 0.030 | |
| 0 |
| Titanium (Ti), % | 0 | |
| 0 to 0.25 |
| Vanadium (V), % | 0 to 1.1 | |
| 0 |
| Zinc (Zn), % | 0 | |
| 4.0 to 5.0 |
| Zirconium (Zr), % | 0 | |
| 0.080 to 0.25 |
| Residuals, % | 0 | |
| 0 to 0.15 |