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