EN 1.4640 Stainless Steel vs. EN 1.4371 Stainless Steel
Both EN 1.4640 stainless steel and EN 1.4371 stainless steel are iron alloys. They have a very high 95% of their average alloy composition in common.
For each property being compared, the top bar is EN 1.4640 stainless steel and the bottom bar is EN 1.4371 stainless steel.
Metric UnitsUS Customary Units
Mechanical Properties
| Brinell Hardness | 190 to 200 | |
| 220 to 230 |
| Elastic (Young's, Tensile) Modulus, GPa | 200 | |
| 200 |
| Elongation at Break, % | 51 | |
| 45 to 51 |
| Fatigue Strength, MPa | 230 to 250 | |
| 290 to 340 |
| Poisson's Ratio | 0.28 | |
| 0.28 |
| Shear Modulus, GPa | 77 | |
| 77 |
| Shear Strength, MPa | 440 to 460 | |
| 520 to 540 |
| Tensile Strength: Ultimate (UTS), MPa | 620 to 650 | |
| 740 to 750 |
| Tensile Strength: Yield (Proof), MPa | 240 to 260 | |
| 320 to 340 |
Thermal Properties
| Latent Heat of Fusion, J/g | 280 | |
| 280 |
| Maximum Temperature: Corrosion, °C | 420 | |
| 410 |
| Maximum Temperature: Mechanical, °C | 930 | |
| 880 |
| Melting Completion (Liquidus), °C | 1420 | |
| 1410 |
| Melting Onset (Solidus), °C | 1380 | |
| 1370 |
| Specific Heat Capacity, J/kg-K | 480 | |
| 480 |
| Thermal Conductivity, W/m-K | 15 | |
| 15 |
| Thermal Expansion, µm/m-K | 16 | |
| 17 |
Electrical Properties
| Electrical Conductivity: Equal Volume, % IACS | 2.4 | |
| 2.5 |
| Electrical Conductivity: Equal Weight (Specific), % IACS | 2.7 | |
| 2.9 |
Otherwise Unclassified Properties
| Base Metal Price, % relative | 14 | |
| 12 |
| Density, g/cm3 | 7.8 | |
| 7.7 |
| Embodied Carbon, kg CO2/kg material | 2.8 | |
| 2.6 |
| Embodied Energy, MJ/kg | 40 | |
| 38 |
| Embodied Water, L/kg | 150 | |
| 140 |
Common Calculations
| PREN (Pitting Resistance) | 20 | |
| 20 |
| Resilience: Ultimate (Unit Rupture Work), MJ/m3 | 250 to 260 | |
| 270 to 310 |
| Resilience: Unit (Modulus of Resilience), kJ/m3 | 150 to 170 | |
| 250 to 300 |
| Stiffness to Weight: Axial, points | 14 | |
| 14 |
| Stiffness to Weight: Bending, points | 25 | |
| 25 |
| Strength to Weight: Axial, points | 22 to 23 | |
| 27 |
| Strength to Weight: Bending, points | 21 | |
| 24 |
| Thermal Diffusivity, mm2/s | 4.0 | |
| 4.0 |
| Thermal Shock Resistance, points | 14 to 15 | |
| 16 |
Alloy Composition
| Carbon (C), % | 0.030 to 0.080 | |
| 0 to 0.030 |
| Chromium (Cr), % | 18 to 19 | |
| 16 to 17.5 |
| Copper (Cu), % | 1.3 to 2.0 | |
| 0 to 1.0 |
| Iron (Fe), % | 67.4 to 73.6 | |
| 66.7 to 74.4 |
| Manganese (Mn), % | 1.5 to 4.0 | |
| 6.0 to 8.0 |
| Nickel (Ni), % | 5.5 to 6.9 | |
| 3.5 to 5.5 |
| Nitrogen (N), % | 0.030 to 0.11 | |
| 0.15 to 0.25 |
| Phosphorus (P), % | 0 to 0.045 | |
| 0 to 0.045 |
| Silicon (Si), % | 0 to 0.5 | |
| 0 to 1.0 |
| Sulfur (S), % | 0 to 0.015 | |
| 0 to 0.015 |