AISI 303 Stainless Steel vs. SAE-AISI 1018 Steel
Both AISI 303 stainless steel and SAE-AISI 1018 steel are iron alloys. They have 72% of their average alloy composition in common. There are 31 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 AISI 303 stainless steel and the bottom bar is SAE-AISI 1018 steel.
Metric UnitsUS Customary Units
Mechanical Properties
| Brinell Hardness | 170 to 210 | |
| 130 to 140 |
| Elastic (Young's, Tensile) Modulus, GPa | 200 | |
| 190 |
| Elongation at Break, % | 40 to 51 | |
| 17 to 27 |
| Fatigue Strength, MPa | 230 to 360 | |
| 180 to 270 |
| Poisson's Ratio | 0.28 | |
| 0.29 |
| Shear Modulus, GPa | 77 | |
| 73 |
| Shear Strength, MPa | 430 to 470 | |
| 280 to 300 |
| Tensile Strength: Ultimate (UTS), MPa | 600 to 690 | |
| 430 to 480 |
| Tensile Strength: Yield (Proof), MPa | 230 to 420 | |
| 240 to 400 |
Thermal Properties
| Latent Heat of Fusion, J/g | 290 | |
| 250 |
| Maximum Temperature: Mechanical, °C | 930 | |
| 400 |
| Melting Completion (Liquidus), °C | 1450 | |
| 1460 |
| Melting Onset (Solidus), °C | 1400 | |
| 1420 |
| Specific Heat Capacity, J/kg-K | 480 | |
| 470 |
| Thermal Conductivity, W/m-K | 16 | |
| 52 |
| Thermal Expansion, µm/m-K | 17 | |
| 12 |
Electrical Properties
| Electrical Conductivity: Equal Volume, % IACS | 2.4 | |
| 7.0 |
| Electrical Conductivity: Equal Weight (Specific), % IACS | 2.8 | |
| 8.0 |
Otherwise Unclassified Properties
| Base Metal Price, % relative | 15 | |
| 1.8 |
| Density, g/cm3 | 7.8 | |
| 7.9 |
| Embodied Carbon, kg CO2/kg material | 3.0 | |
| 1.4 |
| Embodied Energy, MJ/kg | 42 | |
| 18 |
| Embodied Water, L/kg | 140 | |
| 46 |
Common Calculations
| Resilience: Ultimate (Unit Rupture Work), MJ/m3 | 240 | |
| 75 to 100 |
| Resilience: Unit (Modulus of Resilience), kJ/m3 | 140 to 440 | |
| 150 to 430 |
| Stiffness to Weight: Axial, points | 14 | |
| 13 |
| Stiffness to Weight: Bending, points | 25 | |
| 24 |
| Strength to Weight: Axial, points | 21 to 25 | |
| 15 to 17 |
| Strength to Weight: Bending, points | 20 to 22 | |
| 16 to 17 |
| Thermal Diffusivity, mm2/s | 4.4 | |
| 14 |
| Thermal Shock Resistance, points | 13 to 15 | |
| 14 to 15 |
Alloy Composition
| Carbon (C), % | 0 to 0.15 | |
| 0.15 to 0.2 |
| Chromium (Cr), % | 17 to 19 | |
| 0 |
| Iron (Fe), % | 67.3 to 74.9 | |
| 98.8 to 99.25 |
| Manganese (Mn), % | 0 to 2.0 | |
| 0.6 to 0.9 |
| Nickel (Ni), % | 8.0 to 10 | |
| 0 |
| Phosphorus (P), % | 0 to 0.2 | |
| 0 to 0.040 |
| Silicon (Si), % | 0 to 1.0 | |
| 0 |
| Sulfur (S), % | 0.15 to 0.35 | |
| 0 to 0.050 |