EN 1.4303 Stainless Steel vs. SAE-AISI 4320 Steel
Both EN 1.4303 stainless steel and SAE-AISI 4320 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 (3, in this case) are not shown.
For each property being compared, the top bar is EN 1.4303 stainless steel and the bottom bar is SAE-AISI 4320 steel.
Metric UnitsUS Customary Units
Mechanical Properties
| Brinell Hardness | 190 to 270 | |
| 160 to 240 |
| Elastic (Young's, Tensile) Modulus, GPa | 200 | |
| 190 |
| Elongation at Break, % | 13 to 49 | |
| 21 to 29 |
| Fatigue Strength, MPa | 220 to 320 | |
| 320 |
| Poisson's Ratio | 0.28 | |
| 0.29 |
| Shear Modulus, GPa | 77 | |
| 73 |
| Shear Strength, MPa | 420 to 540 | |
| 370 to 500 |
| Tensile Strength: Ultimate (UTS), MPa | 590 to 900 | |
| 570 to 790 |
| Tensile Strength: Yield (Proof), MPa | 230 to 560 | |
| 430 to 460 |
Thermal Properties
| Latent Heat of Fusion, J/g | 290 | |
| 250 |
| Maximum Temperature: Mechanical, °C | 940 | |
| 420 |
| Melting Completion (Liquidus), °C | 1420 | |
| 1460 |
| Melting Onset (Solidus), °C | 1380 | |
| 1420 |
| Specific Heat Capacity, J/kg-K | 480 | |
| 470 |
| Thermal Conductivity, W/m-K | 15 | |
| 46 |
| Thermal Expansion, µm/m-K | 16 | |
| 11 |
Electrical Properties
| Electrical Conductivity: Equal Volume, % IACS | 2.4 | |
| 7.4 |
| Electrical Conductivity: Equal Weight (Specific), % IACS | 2.7 | |
| 8.5 |
Otherwise Unclassified Properties
| Base Metal Price, % relative | 17 | |
| 3.4 |
| Density, g/cm3 | 7.8 | |
| 7.9 |
| Embodied Carbon, kg CO2/kg material | 3.2 | |
| 1.7 |
| Embodied Energy, MJ/kg | 46 | |
| 22 |
| Embodied Water, L/kg | 150 | |
| 52 |
Common Calculations
| Resilience: Ultimate (Unit Rupture Work), MJ/m3 | 110 to 230 | |
| 140 to 150 |
| Resilience: Unit (Modulus of Resilience), kJ/m3 | 140 to 800 | |
| 480 to 560 |
| Stiffness to Weight: Axial, points | 14 | |
| 13 |
| Stiffness to Weight: Bending, points | 25 | |
| 24 |
| Strength to Weight: Axial, points | 21 to 32 | |
| 20 to 28 |
| Strength to Weight: Bending, points | 20 to 26 | |
| 19 to 24 |
| Thermal Diffusivity, mm2/s | 4.0 | |
| 13 |
| Thermal Shock Resistance, points | 13 to 20 | |
| 19 to 27 |
Alloy Composition
| Carbon (C), % | 0 to 0.060 | |
| 0.17 to 0.22 |
| Chromium (Cr), % | 17 to 19 | |
| 0.4 to 0.6 |
| Iron (Fe), % | 64.8 to 72 | |
| 95.8 to 97 |
| Manganese (Mn), % | 0 to 2.0 | |
| 0.45 to 0.65 |
| Molybdenum (Mo), % | 0 | |
| 0.2 to 0.3 |
| Nickel (Ni), % | 11 to 13 | |
| 1.7 to 2.0 |
| Nitrogen (N), % | 0 to 0.1 | |
| 0 |
| Phosphorus (P), % | 0 to 0.045 | |
| 0 to 0.035 |
| Silicon (Si), % | 0 to 1.0 | |
| 0.15 to 0.35 |
| Sulfur (S), % | 0 to 0.015 | |
| 0 to 0.040 |