EN 1.4418 Stainless Steel vs. EN 1.4421 Stainless Steel
Both EN 1.4418 stainless steel and EN 1.4421 stainless steel are iron alloys. They have a very high 99% of their average alloy composition in common. There are 32 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 EN 1.4418 stainless steel and the bottom bar is EN 1.4421 stainless steel.
Metric UnitsUS Customary Units
Mechanical Properties
| Elastic (Young's, Tensile) Modulus, GPa | 200 | |
| 200 |
| Elongation at Break, % | 16 to 20 | |
| 11 to 17 |
| Fatigue Strength, MPa | 350 to 480 | |
| 380 to 520 |
| Impact Strength: V-Notched Charpy, J | 62 to 90 | |
| 30 to 67 |
| Poisson's Ratio | 0.28 | |
| 0.28 |
| Shear Modulus, GPa | 77 | |
| 77 |
| Tensile Strength: Ultimate (UTS), MPa | 860 to 1000 | |
| 880 to 1100 |
| Tensile Strength: Yield (Proof), MPa | 540 to 790 | |
| 620 to 950 |
Thermal Properties
| Latent Heat of Fusion, J/g | 280 | |
| 280 |
| Maximum Temperature: Corrosion, °C | 410 | |
| 410 |
| Maximum Temperature: Mechanical, °C | 870 | |
| 870 |
| Melting Completion (Liquidus), °C | 1450 | |
| 1440 |
| Melting Onset (Solidus), °C | 1400 | |
| 1400 |
| Specific Heat Capacity, J/kg-K | 480 | |
| 480 |
| Thermal Conductivity, W/m-K | 15 | |
| 16 |
| Thermal Expansion, µm/m-K | 10 | |
| 10 |
Electrical Properties
| Electrical Conductivity: Equal Volume, % IACS | 2.2 | |
| 2.2 |
| Electrical Conductivity: Equal Weight (Specific), % IACS | 2.5 | |
| 2.5 |
Otherwise Unclassified Properties
| Base Metal Price, % relative | 13 | |
| 12 |
| Density, g/cm3 | 7.8 | |
| 7.8 |
| Embodied Carbon, kg CO2/kg material | 2.8 | |
| 2.6 |
| Embodied Energy, MJ/kg | 39 | |
| 36 |
| Embodied Water, L/kg | 130 | |
| 130 |
Common Calculations
| PREN (Pitting Resistance) | 20 | |
| 18 |
| Resilience: Ultimate (Unit Rupture Work), MJ/m3 | 130 to 170 | |
| 120 to 140 |
| Resilience: Unit (Modulus of Resilience), kJ/m3 | 730 to 1590 | |
| 960 to 2270 |
| Stiffness to Weight: Axial, points | 14 | |
| 14 |
| Stiffness to Weight: Bending, points | 25 | |
| 25 |
| Strength to Weight: Axial, points | 31 to 36 | |
| 31 to 39 |
| Strength to Weight: Bending, points | 26 to 28 | |
| 26 to 30 |
| Thermal Diffusivity, mm2/s | 4.0 | |
| 4.4 |
| Thermal Shock Resistance, points | 31 to 36 | |
| 31 to 39 |
Alloy Composition
| Carbon (C), % | 0 to 0.060 | |
| 0 to 0.060 |
| Chromium (Cr), % | 15 to 17 | |
| 15.5 to 17.5 |
| Iron (Fe), % | 73.2 to 80.2 | |
| 74.4 to 80.5 |
| Manganese (Mn), % | 0 to 1.5 | |
| 0 to 1.0 |
| Molybdenum (Mo), % | 0.8 to 1.5 | |
| 0 to 0.7 |
| Nickel (Ni), % | 4.0 to 6.0 | |
| 4.0 to 5.5 |
| Nitrogen (N), % | 0 to 0.020 | |
| 0 |
| Phosphorus (P), % | 0 to 0.040 | |
| 0 to 0.035 |
| Silicon (Si), % | 0 to 0.7 | |
| 0 to 0.8 |
| Sulfur (S), % | 0 to 0.015 | |
| 0 to 0.020 |