EN 1.4122 Stainless Steel vs. EN 1.4031 Stainless Steel
Both EN 1.4122 stainless steel and EN 1.4031 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 1.4122 stainless steel and the bottom bar is EN 1.4031 stainless steel.
Metric UnitsUS Customary Units
Mechanical Properties
| Elastic (Young's, Tensile) Modulus, GPa | 200 | |
| 190 |
| Elongation at Break, % | 14 | |
| 11 to 13 |
| Fatigue Strength, MPa | 260 to 360 | |
| 220 to 400 |
| Poisson's Ratio | 0.28 | |
| 0.28 |
| Shear Modulus, GPa | 77 | |
| 76 |
| Shear Strength, MPa | 480 to 520 | |
| 400 to 540 |
| Tensile Strength: Ultimate (UTS), MPa | 790 to 850 | |
| 670 to 900 |
| Tensile Strength: Yield (Proof), MPa | 450 to 630 | |
| 390 to 730 |
Thermal Properties
| Latent Heat of Fusion, J/g | 280 | |
| 280 |
| Maximum Temperature: Corrosion, °C | 400 | |
| 390 |
| Maximum Temperature: Mechanical, °C | 870 | |
| 770 |
| Melting Completion (Liquidus), °C | 1440 | |
| 1440 |
| Melting Onset (Solidus), °C | 1400 | |
| 1400 |
| Specific Heat Capacity, J/kg-K | 480 | |
| 480 |
| Thermal Conductivity, W/m-K | 15 | |
| 30 |
| Thermal Expansion, µm/m-K | 10 | |
| 11 |
Electrical Properties
| Electrical Conductivity: Equal Volume, % IACS | 2.2 | |
| 3.1 |
| Electrical Conductivity: Equal Weight (Specific), % IACS | 2.5 | |
| 3.7 |
Otherwise Unclassified Properties
| Base Metal Price, % relative | 9.5 | |
| 7.0 |
| Density, g/cm3 | 7.7 | |
| 7.7 |
| Embodied Carbon, kg CO2/kg material | 2.4 | |
| 1.9 |
| Embodied Energy, MJ/kg | 33 | |
| 27 |
| Embodied Water, L/kg | 120 | |
| 100 |
Common Calculations
| PREN (Pitting Resistance) | 20 | |
| 14 |
| Resilience: Ultimate (Unit Rupture Work), MJ/m3 | 93 to 110 | |
| 77 to 94 |
| Resilience: Unit (Modulus of Resilience), kJ/m3 | 520 to 1000 | |
| 380 to 1360 |
| Stiffness to Weight: Axial, points | 14 | |
| 14 |
| Stiffness to Weight: Bending, points | 25 | |
| 25 |
| Strength to Weight: Axial, points | 28 to 31 | |
| 24 to 32 |
| Strength to Weight: Bending, points | 25 to 26 | |
| 22 to 27 |
| Thermal Diffusivity, mm2/s | 4.0 | |
| 8.1 |
| Thermal Shock Resistance, points | 28 to 30 | |
| 23 to 32 |
Alloy Composition
| Carbon (C), % | 0.33 to 0.45 | |
| 0.36 to 0.42 |
| Chromium (Cr), % | 15.5 to 17.5 | |
| 12.5 to 14.5 |
| Iron (Fe), % | 77.2 to 83.4 | |
| 83 to 87.1 |
| Manganese (Mn), % | 0 to 1.5 | |
| 0 to 1.0 |
| Molybdenum (Mo), % | 0.8 to 1.3 | |
| 0 |
| Nickel (Ni), % | 0 to 1.0 | |
| 0 |
| Phosphorus (P), % | 0 to 0.040 | |
| 0 to 0.040 |
| Silicon (Si), % | 0 to 1.0 | |
| 0 to 1.0 |
| Sulfur (S), % | 0 to 0.015 | |
| 0 to 0.015 |