ASTM A209 Steel vs. 7175 Aluminum
ASTM A209 steel belongs to the iron alloys classification, while 7175 aluminum belongs to the aluminum 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 ASTM A209 steel and the bottom bar is 7175 aluminum.
Metric UnitsUS Customary Units
Mechanical Properties
| Elastic (Young's, Tensile) Modulus, GPa | 190 | |
| 70 |
| Elongation at Break, % | 34 | |
| 3.8 to 5.9 |
| Fatigue Strength, MPa | 180 to 200 | |
| 150 to 180 |
| Poisson's Ratio | 0.29 | |
| 0.32 |
| Shear Modulus, GPa | 73 | |
| 26 |
| Shear Strength, MPa | 280 to 310 | |
| 290 to 330 |
| Tensile Strength: Ultimate (UTS), MPa | 420 to 460 | |
| 520 to 570 |
| Tensile Strength: Yield (Proof), MPa | 220 to 250 | |
| 430 to 490 |
Thermal Properties
| Latent Heat of Fusion, J/g | 250 | |
| 380 |
| Maximum Temperature: Mechanical, °C | 410 | |
| 180 |
| Melting Completion (Liquidus), °C | 1470 | |
| 640 |
| Melting Onset (Solidus), °C | 1420 to 1430 | |
| 480 |
| Specific Heat Capacity, J/kg-K | 470 | |
| 870 |
| Thermal Conductivity, W/m-K | 50 | |
| 140 |
| Thermal Expansion, µm/m-K | 13 | |
| 23 |
Electrical Properties
| Electrical Conductivity: Equal Volume, % IACS | 7.1 | |
| 33 |
| Electrical Conductivity: Equal Weight (Specific), % IACS | 8.1 to 8.2 | |
| 99 |
Otherwise Unclassified Properties
| Base Metal Price, % relative | 2.4 | |
| 10 |
| Density, g/cm3 | 7.9 | |
| 3.0 |
| Embodied Carbon, kg CO2/kg material | 1.5 | |
| 8.2 |
| Embodied Energy, MJ/kg | 20 | |
| 150 |
| Embodied Water, L/kg | 47 | |
| 1130 |
Common Calculations
| Resilience: Ultimate (Unit Rupture Work), MJ/m3 | 120 to 130 | |
| 18 to 29 |
| Resilience: Unit (Modulus of Resilience), kJ/m3 | 130 to 170 | |
| 1310 to 1730 |
| Stiffness to Weight: Axial, points | 13 | |
| 13 |
| Stiffness to Weight: Bending, points | 24 | |
| 46 |
| Strength to Weight: Axial, points | 15 to 16 | |
| 48 to 52 |
| Strength to Weight: Bending, points | 16 to 17 | |
| 48 to 51 |
| Thermal Diffusivity, mm2/s | 13 | |
| 53 |
| Thermal Shock Resistance, points | 12 to 14 | |
| 23 to 25 |