EN 1.4938 Stainless Steel vs. EN 1.7221 Steel
Both EN 1.4938 stainless steel and EN 1.7221 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 1.7221 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 | |
| 290 to 390 |
| Poisson's Ratio | 0.28 | |
| 0.29 |
| Shear Modulus, GPa | 76 | |
| 73 |
| Tensile Strength: Ultimate (UTS), MPa | 870 to 1030 | |
| 650 to 780 |
| Tensile Strength: Yield (Proof), MPa | 640 to 870 | |
| 430 to 630 |
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 | |
| 44 |
| 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 | |
| 2.4 |
| 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 | |
| 83 to 98 |
| Resilience: Unit (Modulus of Resilience), kJ/m3 | 1050 to 1920 | |
| 490 to 1050 |
| Stiffness to Weight: Axial, points | 14 | |
| 13 |
| Stiffness to Weight: Bending, points | 25 | |
| 24 |
| Strength to Weight: Axial, points | 31 to 37 | |
| 23 to 27 |
| Strength to Weight: Bending, points | 26 to 29 | |
| 21 to 24 |
| Thermal Diffusivity, mm2/s | 8.1 | |
| 12 |
| Thermal Shock Resistance, points | 30 to 35 | |
| 19 to 23 |
Alloy Composition
| Carbon (C), % | 0.080 to 0.15 | |
| 0.22 to 0.29 |
| Chromium (Cr), % | 11 to 12.5 | |
| 0.8 to 1.2 |
| Iron (Fe), % | 80.5 to 84.8 | |
| 96.8 to 98.3 |
| Manganese (Mn), % | 0.4 to 0.9 | |
| 0.5 to 0.8 |
| 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 |