SAE-AISI 1043 Steel vs. 4343 Aluminum
SAE-AISI 1043 steel belongs to the iron alloys classification, while 4343 aluminum belongs to the aluminum alloys. There are 30 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 1043 steel and the bottom bar is 4343 aluminum.
Metric UnitsUS Customary Units
Mechanical Properties
| Elastic (Young's, Tensile) Modulus, GPa | 190 | |
| 71 |
| Elongation at Break, % | 13 to 18 | |
| 4.4 |
| Fatigue Strength, MPa | 230 to 390 | |
| 45 |
| Poisson's Ratio | 0.29 | |
| 0.33 |
| Shear Modulus, GPa | 73 | |
| 27 |
| Shear Strength, MPa | 400 to 430 | |
| 64 |
| Tensile Strength: Ultimate (UTS), MPa | 650 to 710 | |
| 110 |
| Tensile Strength: Yield (Proof), MPa | 350 to 600 | |
| 62 |
Thermal Properties
| Latent Heat of Fusion, J/g | 250 | |
| 510 |
| Maximum Temperature: Mechanical, °C | 400 | |
| 160 |
| Melting Completion (Liquidus), °C | 1460 | |
| 620 |
| Melting Onset (Solidus), °C | 1420 | |
| 580 |
| Specific Heat Capacity, J/kg-K | 470 | |
| 900 |
| Thermal Conductivity, W/m-K | 51 | |
| 180 |
| Thermal Expansion, µm/m-K | 12 | |
| 22 |
Electrical Properties
| Electrical Conductivity: Equal Volume, % IACS | 7.0 | |
| 44 |
| Electrical Conductivity: Equal Weight (Specific), % IACS | 8.1 | |
| 150 |
Otherwise Unclassified Properties
| Base Metal Price, % relative | 1.8 | |
| 9.5 |
| Density, g/cm3 | 7.8 | |
| 2.6 |
| Embodied Carbon, kg CO2/kg material | 1.4 | |
| 7.9 |
| Embodied Energy, MJ/kg | 18 | |
| 150 |
| Embodied Water, L/kg | 46 | |
| 1100 |
Common Calculations
| Resilience: Ultimate (Unit Rupture Work), MJ/m3 | 87 to 100 | |
| 4.1 |
| Resilience: Unit (Modulus of Resilience), kJ/m3 | 320 to 980 | |
| 27 |
| Stiffness to Weight: Axial, points | 13 | |
| 15 |
| Stiffness to Weight: Bending, points | 24 | |
| 53 |
| Strength to Weight: Axial, points | 23 to 25 | |
| 12 |
| Strength to Weight: Bending, points | 21 to 22 | |
| 20 |
| Thermal Diffusivity, mm2/s | 14 | |
| 77 |
| Thermal Shock Resistance, points | 21 to 22 | |
| 5.2 |
Alloy Composition
| Aluminum (Al), % | 0 | |
| 90.3 to 93.2 |
| Carbon (C), % | 0.4 to 0.47 | |
| 0 |
| Copper (Cu), % | 0 | |
| 0 to 0.25 |
| Iron (Fe), % | 98.4 to 98.9 | |
| 0 to 0.8 |
| Manganese (Mn), % | 0.7 to 1.0 | |
| 0 to 0.1 |
| Phosphorus (P), % | 0 to 0.040 | |
| 0 |
| Silicon (Si), % | 0 | |
| 6.8 to 8.2 |
| Sulfur (S), % | 0 to 0.050 | |
| 0 |
| Zinc (Zn), % | 0 | |
| 0 to 0.2 |
| Residuals, % | 0 | |
| 0 to 0.15 |