EN 1.4415 Stainless Steel vs. EN 1.4418 Stainless Steel
Both EN 1.4415 stainless steel and EN 1.4418 stainless steel are iron alloys. They have a very high 96% of their average alloy composition in common.
For each property being compared, the top bar is EN 1.4415 stainless steel and the bottom bar is EN 1.4418 stainless steel.
Metric UnitsUS Customary Units
Mechanical Properties
| Elastic (Young's, Tensile) Modulus, GPa | 200 | |
| 200 |
| Elongation at Break, % | 17 to 20 | |
| 16 to 20 |
| Fatigue Strength, MPa | 470 to 510 | |
| 350 to 480 |
| Impact Strength: V-Notched Charpy, J | 91 to 110 | |
| 62 to 90 |
| Poisson's Ratio | 0.28 | |
| 0.28 |
| Shear Modulus, GPa | 77 | |
| 77 |
| Shear Strength, MPa | 520 to 570 | |
| 530 to 620 |
| Tensile Strength: Ultimate (UTS), MPa | 830 to 930 | |
| 860 to 1000 |
| Tensile Strength: Yield (Proof), MPa | 730 to 840 | |
| 540 to 790 |
Thermal Properties
| Latent Heat of Fusion, J/g | 280 | |
| 280 |
| Maximum Temperature: Corrosion, °C | 390 | |
| 410 |
| Maximum Temperature: Mechanical, °C | 790 | |
| 870 |
| Melting Completion (Liquidus), °C | 1460 | |
| 1450 |
| Melting Onset (Solidus), °C | 1420 | |
| 1400 |
| Specific Heat Capacity, J/kg-K | 470 | |
| 480 |
| Thermal Conductivity, W/m-K | 19 | |
| 15 |
| Thermal Expansion, µm/m-K | 9.9 | |
| 10 |
Electrical Properties
| Electrical Conductivity: Equal Volume, % IACS | 2.4 | |
| 2.2 |
| Electrical Conductivity: Equal Weight (Specific), % IACS | 2.8 | |
| 2.5 |
Otherwise Unclassified Properties
| Base Metal Price, % relative | 13 | |
| 13 |
| Density, g/cm3 | 7.9 | |
| 7.8 |
| Embodied Carbon, kg CO2/kg material | 3.6 | |
| 2.8 |
| Embodied Energy, MJ/kg | 51 | |
| 39 |
| Embodied Water, L/kg | 120 | |
| 130 |
Common Calculations
| PREN (Pitting Resistance) | 19 | |
| 20 |
| Resilience: Ultimate (Unit Rupture Work), MJ/m3 | 150 to 160 | |
| 130 to 170 |
| Resilience: Unit (Modulus of Resilience), kJ/m3 | 1350 to 1790 | |
| 730 to 1590 |
| Stiffness to Weight: Axial, points | 14 | |
| 14 |
| Stiffness to Weight: Bending, points | 25 | |
| 25 |
| Strength to Weight: Axial, points | 29 to 33 | |
| 31 to 36 |
| Strength to Weight: Bending, points | 25 to 27 | |
| 26 to 28 |
| Thermal Diffusivity, mm2/s | 5.1 | |
| 4.0 |
| Thermal Shock Resistance, points | 30 to 34 | |
| 31 to 36 |
Alloy Composition
| Carbon (C), % | 0 to 0.030 | |
| 0 to 0.060 |
| Chromium (Cr), % | 11.5 to 13.5 | |
| 15 to 17 |
| Iron (Fe), % | 75.9 to 82.4 | |
| 73.2 to 80.2 |
| Manganese (Mn), % | 0 to 0.5 | |
| 0 to 1.5 |
| Molybdenum (Mo), % | 1.5 to 2.5 | |
| 0.8 to 1.5 |
| Nickel (Ni), % | 4.5 to 6.5 | |
| 4.0 to 6.0 |
| Nitrogen (N), % | 0 | |
| 0 to 0.020 |
| Phosphorus (P), % | 0 to 0.040 | |
| 0 to 0.040 |
| Silicon (Si), % | 0 to 0.5 | |
| 0 to 0.7 |
| Sulfur (S), % | 0 to 0.015 | |
| 0 to 0.015 |
| Titanium (Ti), % | 0 to 0.010 | |
| 0 |
| Vanadium (V), % | 0.1 to 0.5 | |
| 0 |