ASTM A148 Cast Steel vs. 7020 Aluminum
ASTM A148 cast steel belongs to the iron alloys classification, while 7020 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 A148 cast steel and the bottom bar is 7020 aluminum.
Metric UnitsUS Customary Units
Mechanical Properties
| Brinell Hardness | 190 to 390 | |
| 45 to 100 |
| Elastic (Young's, Tensile) Modulus, GPa | 190 | |
| 70 |
| Elongation at Break, % | 5.7 to 25 | |
| 8.4 to 14 |
| Fatigue Strength, MPa | 280 to 670 | |
| 110 to 130 |
| Poisson's Ratio | 0.29 | |
| 0.33 |
| Shear Modulus, GPa | 73 | |
| 26 |
| Tensile Strength: Ultimate (UTS), MPa | 630 to 1300 | |
| 190 to 390 |
| Tensile Strength: Yield (Proof), MPa | 390 to 1160 | |
| 120 to 310 |
Thermal Properties
| Latent Heat of Fusion, J/g | 250 | |
| 380 |
| Maximum Temperature: Mechanical, °C | 400 to 430 | |
| 210 |
| Melting Completion (Liquidus), °C | 1460 | |
| 650 |
| Melting Onset (Solidus), °C | 1420 | |
| 610 |
| Specific Heat Capacity, J/kg-K | 470 | |
| 880 |
| Thermal Conductivity, W/m-K | 37 to 47 | |
| 150 |
| Thermal Expansion, µm/m-K | 13 | |
| 23 |
Electrical Properties
| Electrical Conductivity: Equal Volume, % IACS | 7.3 to 7.5 | |
| 39 |
| Electrical Conductivity: Equal Weight (Specific), % IACS | 8.3 to 8.6 | |
| 120 |
Otherwise Unclassified Properties
| Base Metal Price, % relative | 2.3 to 3.3 | |
| 9.5 |
| Density, g/cm3 | 7.8 | |
| 2.9 |
| Embodied Carbon, kg CO2/kg material | 1.5 to 1.7 | |
| 8.3 |
| Embodied Energy, MJ/kg | 20 to 22 | |
| 150 |
| Embodied Water, L/kg | 48 to 53 | |
| 1150 |
Common Calculations
| Resilience: Ultimate (Unit Rupture Work), MJ/m3 | 71 to 150 | |
| 23 to 46 |
| Resilience: Unit (Modulus of Resilience), kJ/m3 | 400 to 3570 | |
| 110 to 690 |
| Stiffness to Weight: Axial, points | 13 | |
| 13 |
| Stiffness to Weight: Bending, points | 24 | |
| 47 |
| Strength to Weight: Axial, points | 22 to 46 | |
| 18 to 37 |
| Strength to Weight: Bending, points | 21 to 34 | |
| 25 to 41 |
| Thermal Diffusivity, mm2/s | 9.9 to 13 | |
| 59 |
| Thermal Shock Resistance, points | 18 to 38 | |
| 8.3 to 17 |