EN 1.4938 Stainless Steel vs. EN 1.4028 Stainless Steel
Both EN 1.4938 stainless steel and EN 1.4028 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 1.4938 stainless steel and the bottom bar is EN 1.4028 stainless steel.
Metric UnitsUS Customary Units
Mechanical Properties
| Elastic (Young's, Tensile) Modulus, GPa | 200 | |
| 190 |
| Elongation at Break, % | 16 to 17 | |
| 11 to 17 |
| Fatigue Strength, MPa | 390 to 520 | |
| 230 to 400 |
| Poisson's Ratio | 0.28 | |
| 0.28 |
| Shear Modulus, GPa | 76 | |
| 76 |
| Shear Strength, MPa | 540 to 630 | |
| 410 to 550 |
| Tensile Strength: Ultimate (UTS), MPa | 870 to 1030 | |
| 660 to 930 |
| Tensile Strength: Yield (Proof), MPa | 640 to 870 | |
| 390 to 730 |
Thermal Properties
| Latent Heat of Fusion, J/g | 270 | |
| 270 |
| Maximum Temperature: Corrosion, °C | 390 | |
| 390 |
| Maximum Temperature: Mechanical, °C | 750 | |
| 760 |
| Melting Completion (Liquidus), °C | 1460 | |
| 1440 |
| Melting Onset (Solidus), °C | 1420 | |
| 1400 |
| Specific Heat Capacity, J/kg-K | 470 | |
| 480 |
| Thermal Conductivity, W/m-K | 30 | |
| 30 |
| Thermal Expansion, µm/m-K | 11 | |
| 11 |
Electrical Properties
| Electrical Conductivity: Equal Volume, % IACS | 2.9 | |
| 2.8 |
| Electrical Conductivity: Equal Weight (Specific), % IACS | 3.3 | |
| 3.2 |
Otherwise Unclassified Properties
| Base Metal Price, % relative | 10 | |
| 7.0 |
| Density, g/cm3 | 7.8 | |
| 7.7 |
| Embodied Carbon, kg CO2/kg material | 3.3 | |
| 1.9 |
| Embodied Energy, MJ/kg | 47 | |
| 27 |
| Embodied Water, L/kg | 110 | |
| 100 |
Common Calculations
| PREN (Pitting Resistance) | 18 | |
| 13 |
| Resilience: Ultimate (Unit Rupture Work), MJ/m3 | 140 to 160 | |
| 94 to 96 |
| Resilience: Unit (Modulus of Resilience), kJ/m3 | 1050 to 1920 | |
| 380 to 1360 |
| Stiffness to Weight: Axial, points | 14 | |
| 14 |
| Stiffness to Weight: Bending, points | 25 | |
| 25 |
| Strength to Weight: Axial, points | 31 to 37 | |
| 24 to 33 |
| Strength to Weight: Bending, points | 26 to 29 | |
| 22 to 27 |
| Thermal Diffusivity, mm2/s | 8.1 | |
| 8.1 |
| Thermal Shock Resistance, points | 30 to 35 | |
| 23 to 32 |
Alloy Composition
| Carbon (C), % | 0.080 to 0.15 | |
| 0.26 to 0.35 |
| Chromium (Cr), % | 11 to 12.5 | |
| 12 to 14 |
| Iron (Fe), % | 80.5 to 84.8 | |
| 83.1 to 87.7 |
| Manganese (Mn), % | 0.4 to 0.9 | |
| 0 to 1.5 |
| Molybdenum (Mo), % | 1.5 to 2.0 | |
| 0 |
| Nickel (Ni), % | 2.0 to 3.0 | |
| 0 |
| Nitrogen (N), % | 0.020 to 0.040 | |
| 0 |
| Phosphorus (P), % | 0 to 0.025 | |
| 0 to 0.040 |
| Silicon (Si), % | 0 to 0.5 | |
| 0 to 1.0 |
| Sulfur (S), % | 0 to 0.015 | |
| 0 to 0.015 |
| Vanadium (V), % | 0.25 to 0.4 | |
| 0 |