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