SAE-AISI 1018 Steel vs. EN 1.4031 Stainless Steel
Both SAE-AISI 1018 steel and EN 1.4031 stainless steel are iron alloys. They have 86% of their average alloy composition in common. There are 30 material properties with values for both materials. Properties with values for just one material (4, in this case) are not shown.
For each property being compared, the top bar is SAE-AISI 1018 steel and the bottom bar is EN 1.4031 stainless steel.
Metric UnitsUS Customary Units
Mechanical Properties
| Elastic (Young's, Tensile) Modulus, GPa | 190 | |
| 190 |
| Elongation at Break, % | 17 to 27 | |
| 11 to 13 |
| Fatigue Strength, MPa | 180 to 270 | |
| 220 to 400 |
| Poisson's Ratio | 0.29 | |
| 0.28 |
| Shear Modulus, GPa | 73 | |
| 76 |
| Shear Strength, MPa | 280 to 300 | |
| 400 to 540 |
| Tensile Strength: Ultimate (UTS), MPa | 430 to 480 | |
| 670 to 900 |
| Tensile Strength: Yield (Proof), MPa | 240 to 400 | |
| 390 to 730 |
Thermal Properties
| Latent Heat of Fusion, J/g | 250 | |
| 280 |
| Maximum Temperature: Mechanical, °C | 400 | |
| 770 |
| Melting Completion (Liquidus), °C | 1460 | |
| 1440 |
| Melting Onset (Solidus), °C | 1420 | |
| 1400 |
| Specific Heat Capacity, J/kg-K | 470 | |
| 480 |
| Thermal Conductivity, W/m-K | 52 | |
| 30 |
| Thermal Expansion, µm/m-K | 12 | |
| 11 |
Electrical Properties
| Electrical Conductivity: Equal Volume, % IACS | 7.0 | |
| 3.1 |
| Electrical Conductivity: Equal Weight (Specific), % IACS | 8.0 | |
| 3.7 |
Otherwise Unclassified Properties
| Base Metal Price, % relative | 1.8 | |
| 7.0 |
| Density, g/cm3 | 7.9 | |
| 7.7 |
| Embodied Carbon, kg CO2/kg material | 1.4 | |
| 1.9 |
| Embodied Energy, MJ/kg | 18 | |
| 27 |
| Embodied Water, L/kg | 46 | |
| 100 |
Common Calculations
| Resilience: Ultimate (Unit Rupture Work), MJ/m3 | 75 to 100 | |
| 77 to 94 |
| Resilience: Unit (Modulus of Resilience), kJ/m3 | 150 to 430 | |
| 380 to 1360 |
| Stiffness to Weight: Axial, points | 13 | |
| 14 |
| Stiffness to Weight: Bending, points | 24 | |
| 25 |
| Strength to Weight: Axial, points | 15 to 17 | |
| 24 to 32 |
| Strength to Weight: Bending, points | 16 to 17 | |
| 22 to 27 |
| Thermal Diffusivity, mm2/s | 14 | |
| 8.1 |
| Thermal Shock Resistance, points | 14 to 15 | |
| 23 to 32 |
Alloy Composition
| Carbon (C), % | 0.15 to 0.2 | |
| 0.36 to 0.42 |
| Chromium (Cr), % | 0 | |
| 12.5 to 14.5 |
| Iron (Fe), % | 98.8 to 99.25 | |
| 83 to 87.1 |
| Manganese (Mn), % | 0.6 to 0.9 | |
| 0 to 1.0 |
| Phosphorus (P), % | 0 to 0.040 | |
| 0 to 0.040 |
| Silicon (Si), % | 0 | |
| 0 to 1.0 |
| Sulfur (S), % | 0 to 0.050 | |
| 0 to 0.015 |