EN 1.4938 Stainless Steel vs. EN 1.7231 Steel
Both EN 1.4938 stainless steel and EN 1.7231 steel are iron alloys. They have 85% of their average alloy composition in common. There are 29 material properties with values for both materials. Properties with values for just one material (5, in this case) are not shown.
For each property being compared, the top bar is EN 1.4938 stainless steel and the bottom bar is EN 1.7231 steel.
Metric UnitsUS Customary Units
Mechanical Properties
| Elastic (Young's, Tensile) Modulus, GPa | 200 | |
| 190 |
| Elongation at Break, % | 16 to 17 | |
| 11 to 12 |
| Fatigue Strength, MPa | 390 to 520 | |
| 360 to 500 |
| Poisson's Ratio | 0.28 | |
| 0.29 |
| Shear Modulus, GPa | 76 | |
| 73 |
| Tensile Strength: Ultimate (UTS), MPa | 870 to 1030 | |
| 790 to 930 |
| Tensile Strength: Yield (Proof), MPa | 640 to 870 | |
| 570 to 800 |
Thermal Properties
| Latent Heat of Fusion, J/g | 270 | |
| 250 |
| Maximum Temperature: Mechanical, °C | 750 | |
| 420 |
| Melting Completion (Liquidus), °C | 1460 | |
| 1460 |
| Melting Onset (Solidus), °C | 1420 | |
| 1420 |
| Specific Heat Capacity, J/kg-K | 470 | |
| 470 |
| Thermal Conductivity, W/m-K | 30 | |
| 46 |
| Thermal Expansion, µm/m-K | 11 | |
| 13 |
Electrical Properties
| Electrical Conductivity: Equal Volume, % IACS | 2.9 | |
| 7.3 |
| Electrical Conductivity: Equal Weight (Specific), % IACS | 3.3 | |
| 8.4 |
Otherwise Unclassified Properties
| Base Metal Price, % relative | 10 | |
| 2.5 |
| Density, g/cm3 | 7.8 | |
| 7.8 |
| Embodied Carbon, kg CO2/kg material | 3.3 | |
| 1.5 |
| Embodied Energy, MJ/kg | 47 | |
| 20 |
| Embodied Water, L/kg | 110 | |
| 51 |
Common Calculations
| Resilience: Ultimate (Unit Rupture Work), MJ/m3 | 140 to 160 | |
| 87 to 100 |
| Resilience: Unit (Modulus of Resilience), kJ/m3 | 1050 to 1920 | |
| 870 to 1700 |
| Stiffness to Weight: Axial, points | 14 | |
| 13 |
| Stiffness to Weight: Bending, points | 25 | |
| 24 |
| Strength to Weight: Axial, points | 31 to 37 | |
| 28 to 33 |
| Strength to Weight: Bending, points | 26 to 29 | |
| 24 to 27 |
| Thermal Diffusivity, mm2/s | 8.1 | |
| 12 |
| Thermal Shock Resistance, points | 30 to 35 | |
| 23 to 27 |
Alloy Composition
| Carbon (C), % | 0.080 to 0.15 | |
| 0.38 to 0.45 |
| Chromium (Cr), % | 11 to 12.5 | |
| 0.8 to 1.2 |
| Iron (Fe), % | 80.5 to 84.8 | |
| 96.4 to 98.1 |
| Manganese (Mn), % | 0.4 to 0.9 | |
| 0.6 to 1.0 |
| Molybdenum (Mo), % | 1.5 to 2.0 | |
| 0.15 to 0.3 |
| Nickel (Ni), % | 2.0 to 3.0 | |
| 0 |
| Nitrogen (N), % | 0.020 to 0.040 | |
| 0 |
| Phosphorus (P), % | 0 to 0.025 | |
| 0 to 0.025 |
| Silicon (Si), % | 0 to 0.5 | |
| 0 to 0.6 |
| Sulfur (S), % | 0 to 0.015 | |
| 0 to 0.030 |
| Vanadium (V), % | 0.25 to 0.4 | |
| 0 |