EN 1.4029 Stainless Steel vs. EN 1.4938 Stainless Steel
Both EN 1.4029 stainless steel and EN 1.4938 stainless steel are iron alloys. They have a very high 96% of their average alloy composition in common.
For each property being compared, the top bar is EN 1.4029 stainless steel and the bottom bar is EN 1.4938 stainless steel.
Metric UnitsUS Customary Units
Mechanical Properties
| Elastic (Young's, Tensile) Modulus, GPa | 190 | |
| 200 |
| Elongation at Break, % | 10 to 20 | |
| 16 to 17 |
| Fatigue Strength, MPa | 270 to 400 | |
| 390 to 520 |
| Poisson's Ratio | 0.28 | |
| 0.28 |
| Shear Modulus, GPa | 76 | |
| 76 |
| Shear Strength, MPa | 440 to 550 | |
| 540 to 630 |
| Tensile Strength: Ultimate (UTS), MPa | 700 to 930 | |
| 870 to 1030 |
| Tensile Strength: Yield (Proof), MPa | 410 to 740 | |
| 640 to 870 |
Thermal Properties
| Latent Heat of Fusion, J/g | 270 | |
| 270 |
| Maximum Temperature: Corrosion, °C | 390 | |
| 390 |
| Maximum Temperature: Mechanical, °C | 750 | |
| 750 |
| Melting Completion (Liquidus), °C | 1440 | |
| 1460 |
| Melting Onset (Solidus), °C | 1400 | |
| 1420 |
| Specific Heat Capacity, J/kg-K | 480 | |
| 470 |
| Thermal Conductivity, W/m-K | 30 | |
| 30 |
| Thermal Expansion, µm/m-K | 10 | |
| 11 |
Electrical Properties
| Electrical Conductivity: Equal Volume, % IACS | 3.1 | |
| 2.9 |
| Electrical Conductivity: Equal Weight (Specific), % IACS | 3.7 | |
| 3.3 |
Otherwise Unclassified Properties
| Base Metal Price, % relative | 7.0 | |
| 10 |
| Density, g/cm3 | 7.7 | |
| 7.8 |
| Embodied Carbon, kg CO2/kg material | 2.0 | |
| 3.3 |
| Embodied Energy, MJ/kg | 28 | |
| 47 |
| Embodied Water, L/kg | 100 | |
| 110 |
Common Calculations
| PREN (Pitting Resistance) | 14 | |
| 18 |
| Resilience: Ultimate (Unit Rupture Work), MJ/m3 | 89 to 120 | |
| 140 to 160 |
| Resilience: Unit (Modulus of Resilience), kJ/m3 | 440 to 1410 | |
| 1050 to 1920 |
| Stiffness to Weight: Axial, points | 14 | |
| 14 |
| Stiffness to Weight: Bending, points | 25 | |
| 25 |
| Strength to Weight: Axial, points | 25 to 33 | |
| 31 to 37 |
| Strength to Weight: Bending, points | 23 to 27 | |
| 26 to 29 |
| Thermal Diffusivity, mm2/s | 8.1 | |
| 8.1 |
| Thermal Shock Resistance, points | 26 to 34 | |
| 30 to 35 |
Alloy Composition
| Carbon (C), % | 0.25 to 0.32 | |
| 0.080 to 0.15 |
| Chromium (Cr), % | 12 to 13.5 | |
| 11 to 12.5 |
| Iron (Fe), % | 82.8 to 87.6 | |
| 80.5 to 84.8 |
| Manganese (Mn), % | 0 to 1.5 | |
| 0.4 to 0.9 |
| Molybdenum (Mo), % | 0 to 0.6 | |
| 1.5 to 2.0 |
| Nickel (Ni), % | 0 | |
| 2.0 to 3.0 |
| Nitrogen (N), % | 0 | |
| 0.020 to 0.040 |
| Phosphorus (P), % | 0 to 0.040 | |
| 0 to 0.025 |
| Silicon (Si), % | 0 to 1.0 | |
| 0 to 0.5 |
| Sulfur (S), % | 0.15 to 0.25 | |
| 0 to 0.015 |
| Vanadium (V), % | 0 | |
| 0.25 to 0.4 |