EN 1.4618 Stainless Steel vs. EN 1.4404 Stainless Steel
Both EN 1.4618 stainless steel and EN 1.4404 stainless steel are iron alloys. They have a moderately high 91% of their average alloy composition in common.
For each property being compared, the top bar is EN 1.4618 stainless steel and the bottom bar is EN 1.4404 stainless steel.
Metric UnitsUS Customary Units
Mechanical Properties
| Brinell Hardness | 200 to 210 | |
| 190 to 270 |
| Elastic (Young's, Tensile) Modulus, GPa | 200 | |
| 200 |
| Elongation at Break, % | 51 | |
| 14 to 43 |
| Fatigue Strength, MPa | 240 to 250 | |
| 220 to 320 |
| Impact Strength: V-Notched Charpy, J | 90 to 91 | |
| 91 to 93 |
| Poisson's Ratio | 0.28 | |
| 0.28 |
| Shear Modulus, GPa | 77 | |
| 78 |
| Shear Strength, MPa | 480 to 500 | |
| 420 to 550 |
| Tensile Strength: Ultimate (UTS), MPa | 680 to 700 | |
| 600 to 900 |
| Tensile Strength: Yield (Proof), MPa | 250 to 260 | |
| 240 to 570 |
Thermal Properties
| Latent Heat of Fusion, J/g | 280 | |
| 290 |
| Maximum Temperature: Corrosion, °C | 410 | |
| 410 |
| Maximum Temperature: Mechanical, °C | 900 | |
| 950 |
| Melting Completion (Liquidus), °C | 1400 | |
| 1440 |
| Melting Onset (Solidus), °C | 1360 | |
| 1400 |
| Specific Heat Capacity, J/kg-K | 480 | |
| 470 |
| Thermal Conductivity, W/m-K | 15 | |
| 15 |
| Thermal Expansion, µm/m-K | 16 | |
| 16 |
Electrical Properties
| Electrical Conductivity: Equal Volume, % IACS | 2.4 | |
| 2.3 |
| Electrical Conductivity: Equal Weight (Specific), % IACS | 2.7 | |
| 2.6 |
Otherwise Unclassified Properties
| Base Metal Price, % relative | 13 | |
| 19 |
| Density, g/cm3 | 7.7 | |
| 7.9 |
| Embodied Carbon, kg CO2/kg material | 2.7 | |
| 3.8 |
| Embodied Energy, MJ/kg | 39 | |
| 52 |
| Embodied Water, L/kg | 150 | |
| 150 |
Common Calculations
| PREN (Pitting Resistance) | 19 | |
| 26 |
| Resilience: Ultimate (Unit Rupture Work), MJ/m3 | 270 to 280 | |
| 110 to 210 |
| Resilience: Unit (Modulus of Resilience), kJ/m3 | 160 to 170 | |
| 140 to 800 |
| Stiffness to Weight: Axial, points | 14 | |
| 14 |
| Stiffness to Weight: Bending, points | 25 | |
| 25 |
| Strength to Weight: Axial, points | 24 to 25 | |
| 21 to 32 |
| Strength to Weight: Bending, points | 22 to 23 | |
| 20 to 26 |
| Thermal Diffusivity, mm2/s | 4.0 | |
| 4.0 |
| Thermal Shock Resistance, points | 15 to 16 | |
| 13 to 20 |
Alloy Composition
| Carbon (C), % | 0 to 0.1 | |
| 0 to 0.030 |
| Chromium (Cr), % | 16.5 to 18.5 | |
| 16.5 to 18.5 |
| Copper (Cu), % | 1.0 to 2.5 | |
| 0 |
| Iron (Fe), % | 62.7 to 72.5 | |
| 62.8 to 71.5 |
| Manganese (Mn), % | 5.5 to 9.5 | |
| 0 to 2.0 |
| Molybdenum (Mo), % | 0 | |
| 2.0 to 2.5 |
| Nickel (Ni), % | 4.5 to 5.5 | |
| 10 to 13 |
| Nitrogen (N), % | 0 to 0.15 | |
| 0 to 0.1 |
| Phosphorus (P), % | 0 to 0.070 | |
| 0 to 0.045 |
| Silicon (Si), % | 0 to 1.0 | |
| 0 to 1.0 |
| Sulfur (S), % | 0 to 0.010 | |
| 0 to 0.015 |