EN 1.4031 Stainless Steel vs. EN 1.4029 Stainless Steel
Both EN 1.4031 stainless steel and EN 1.4029 stainless steel are iron alloys. Their average alloy composition is basically identical.
For each property being compared, the top bar is EN 1.4031 stainless steel and the bottom bar is EN 1.4029 stainless steel.
Metric UnitsUS Customary Units
Mechanical Properties
| Elastic (Young's, Tensile) Modulus, GPa | 190 | |
| 190 |
| Elongation at Break, % | 11 to 13 | |
| 10 to 20 |
| Fatigue Strength, MPa | 220 to 400 | |
| 270 to 400 |
| Poisson's Ratio | 0.28 | |
| 0.28 |
| Shear Modulus, GPa | 76 | |
| 76 |
| Shear Strength, MPa | 400 to 540 | |
| 440 to 550 |
| Tensile Strength: Ultimate (UTS), MPa | 670 to 900 | |
| 700 to 930 |
| Tensile Strength: Yield (Proof), MPa | 390 to 730 | |
| 410 to 740 |
Thermal Properties
| Latent Heat of Fusion, J/g | 280 | |
| 270 |
| Maximum Temperature: Corrosion, °C | 390 | |
| 390 |
| Maximum Temperature: Mechanical, °C | 770 | |
| 750 |
| 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 | 30 | |
| 30 |
| Thermal Expansion, µm/m-K | 11 | |
| 10 |
Electrical Properties
| Electrical Conductivity: Equal Volume, % IACS | 3.1 | |
| 3.1 |
| Electrical Conductivity: Equal Weight (Specific), % IACS | 3.7 | |
| 3.7 |
Otherwise Unclassified Properties
| Base Metal Price, % relative | 7.0 | |
| 7.0 |
| Density, g/cm3 | 7.7 | |
| 7.7 |
| Embodied Carbon, kg CO2/kg material | 1.9 | |
| 2.0 |
| Embodied Energy, MJ/kg | 27 | |
| 28 |
| Embodied Water, L/kg | 100 | |
| 100 |
Common Calculations
| PREN (Pitting Resistance) | 14 | |
| 14 |
| Resilience: Ultimate (Unit Rupture Work), MJ/m3 | 77 to 94 | |
| 89 to 120 |
| Resilience: Unit (Modulus of Resilience), kJ/m3 | 380 to 1360 | |
| 440 to 1410 |
| Stiffness to Weight: Axial, points | 14 | |
| 14 |
| Stiffness to Weight: Bending, points | 25 | |
| 25 |
| Strength to Weight: Axial, points | 24 to 32 | |
| 25 to 33 |
| Strength to Weight: Bending, points | 22 to 27 | |
| 23 to 27 |
| Thermal Diffusivity, mm2/s | 8.1 | |
| 8.1 |
| Thermal Shock Resistance, points | 23 to 32 | |
| 26 to 34 |
Alloy Composition
| Carbon (C), % | 0.36 to 0.42 | |
| 0.25 to 0.32 |
| Chromium (Cr), % | 12.5 to 14.5 | |
| 12 to 13.5 |
| Iron (Fe), % | 83 to 87.1 | |
| 82.8 to 87.6 |
| Manganese (Mn), % | 0 to 1.0 | |
| 0 to 1.5 |
| Molybdenum (Mo), % | 0 | |
| 0 to 0.6 |
| 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 | |
| 0.15 to 0.25 |