SAE-AISI 1038 Steel vs. SAE-AISI 4028 Steel
Both SAE-AISI 1038 steel and SAE-AISI 4028 steel are iron alloys. Their average alloy composition is basically identical. There are 31 material properties with values for both materials. Properties with values for just one material (1, in this case) are not shown.
For each property being compared, the top bar is SAE-AISI 1038 steel and the bottom bar is SAE-AISI 4028 steel.
Metric UnitsUS Customary Units
Mechanical Properties
| Brinell Hardness | 170 to 180 | |
| 150 to 190 |
| Elastic (Young's, Tensile) Modulus, GPa | 190 | |
| 190 |
| Elongation at Break, % | 14 to 20 | |
| 14 to 23 |
| Fatigue Strength, MPa | 220 to 350 | |
| 180 to 330 |
| Poisson's Ratio | 0.29 | |
| 0.29 |
| Shear Modulus, GPa | 73 | |
| 73 |
| Shear Strength, MPa | 370 to 390 | |
| 310 to 380 |
| Tensile Strength: Ultimate (UTS), MPa | 590 to 640 | |
| 490 to 630 |
| Tensile Strength: Yield (Proof), MPa | 320 to 540 | |
| 260 to 520 |
Thermal Properties
| Latent Heat of Fusion, J/g | 250 | |
| 250 |
| Maximum Temperature: Mechanical, °C | 400 | |
| 400 |
| Melting Completion (Liquidus), °C | 1460 | |
| 1460 |
| Melting Onset (Solidus), °C | 1420 | |
| 1420 |
| Specific Heat Capacity, J/kg-K | 470 | |
| 470 |
| Thermal Conductivity, W/m-K | 51 | |
| 49 |
| Thermal Expansion, µm/m-K | 12 | |
| 12 |
Electrical Properties
| Electrical Conductivity: Equal Volume, % IACS | 7.0 | |
| 7.1 |
| Electrical Conductivity: Equal Weight (Specific), % IACS | 8.0 | |
| 8.1 |
Otherwise Unclassified Properties
| Base Metal Price, % relative | 1.8 | |
| 2.1 |
| Density, g/cm3 | 7.8 | |
| 7.8 |
| Embodied Carbon, kg CO2/kg material | 1.4 | |
| 1.5 |
| Embodied Energy, MJ/kg | 18 | |
| 19 |
| Embodied Water, L/kg | 46 | |
| 47 |
Common Calculations
| Resilience: Ultimate (Unit Rupture Work), MJ/m3 | 83 to 100 | |
| 81 to 95 |
| Resilience: Unit (Modulus of Resilience), kJ/m3 | 270 to 790 | |
| 180 to 720 |
| Stiffness to Weight: Axial, points | 13 | |
| 13 |
| Stiffness to Weight: Bending, points | 24 | |
| 24 |
| Strength to Weight: Axial, points | 21 to 23 | |
| 17 to 22 |
| Strength to Weight: Bending, points | 20 to 21 | |
| 18 to 21 |
| Thermal Diffusivity, mm2/s | 14 | |
| 13 |
| Thermal Shock Resistance, points | 19 to 20 | |
| 16 to 20 |
Alloy Composition
| Carbon (C), % | 0.35 to 0.42 | |
| 0.25 to 0.3 |
| Iron (Fe), % | 98.6 to 99.05 | |
| 98.1 to 98.7 |
| Manganese (Mn), % | 0.6 to 0.9 | |
| 0.7 to 0.9 |
| Molybdenum (Mo), % | 0 | |
| 0.2 to 0.3 |
| Phosphorus (P), % | 0 to 0.040 | |
| 0 to 0.035 |
| Silicon (Si), % | 0 | |
| 0.15 to 0.35 |
| Sulfur (S), % | 0 to 0.050 | |
| 0.035 to 0.050 |