EN 1.4021 Stainless Steel vs. EN 1.4568 Stainless Steel
Both EN 1.4021 stainless steel and EN 1.4568 stainless steel are iron alloys. They have 88% of their average alloy composition in common.
For each property being compared, the top bar is EN 1.4021 stainless steel and the bottom bar is EN 1.4568 stainless steel.
Metric UnitsUS Customary Units
Mechanical Properties
| Elastic (Young's, Tensile) Modulus, GPa | 190 | |
| 200 |
| Elongation at Break, % | 11 to 17 | |
| 2.3 to 21 |
| Fatigue Strength, MPa | 240 to 380 | |
| 220 to 670 |
| Poisson's Ratio | 0.28 | |
| 0.28 |
| Shear Modulus, GPa | 76 | |
| 76 |
| Shear Strength, MPa | 390 to 530 | |
| 520 to 930 |
| Tensile Strength: Ultimate (UTS), MPa | 630 to 880 | |
| 830 to 1620 |
| Tensile Strength: Yield (Proof), MPa | 390 to 670 | |
| 330 to 1490 |
Thermal Properties
| Latent Heat of Fusion, J/g | 270 | |
| 280 |
| Maximum Temperature: Corrosion, °C | 390 | |
| 410 |
| Maximum Temperature: Mechanical, °C | 760 | |
| 890 |
| Melting Completion (Liquidus), °C | 1440 | |
| 1420 |
| Melting Onset (Solidus), °C | 1400 | |
| 1380 |
| Specific Heat Capacity, J/kg-K | 480 | |
| 480 |
| Thermal Conductivity, W/m-K | 30 | |
| 16 |
| Thermal Expansion, µm/m-K | 11 | |
| 13 |
Electrical Properties
| Electrical Conductivity: Equal Volume, % IACS | 2.9 | |
| 2.2 |
| Electrical Conductivity: Equal Weight (Specific), % IACS | 3.3 | |
| 2.5 |
Otherwise Unclassified Properties
| Base Metal Price, % relative | 7.0 | |
| 13 |
| Density, g/cm3 | 7.7 | |
| 7.7 |
| Embodied Carbon, kg CO2/kg material | 1.9 | |
| 2.8 |
| Embodied Energy, MJ/kg | 27 | |
| 40 |
| Embodied Water, L/kg | 100 | |
| 140 |
Common Calculations
| PREN (Pitting Resistance) | 13 | |
| 17 |
| Resilience: Ultimate (Unit Rupture Work), MJ/m3 | 88 to 110 | |
| 36 to 140 |
| Resilience: Unit (Modulus of Resilience), kJ/m3 | 400 to 1160 | |
| 290 to 5710 |
| Stiffness to Weight: Axial, points | 14 | |
| 14 |
| Stiffness to Weight: Bending, points | 25 | |
| 25 |
| Strength to Weight: Axial, points | 23 to 31 | |
| 30 to 58 |
| Strength to Weight: Bending, points | 21 to 26 | |
| 25 to 40 |
| Thermal Diffusivity, mm2/s | 8.1 | |
| 4.3 |
| Thermal Shock Resistance, points | 22 to 31 | |
| 23 to 46 |
Alloy Composition
| Aluminum (Al), % | 0 | |
| 0.7 to 1.5 |
| Carbon (C), % | 0.16 to 0.25 | |
| 0 to 0.090 |
| Chromium (Cr), % | 12 to 14 | |
| 16 to 18 |
| Iron (Fe), % | 83.2 to 87.8 | |
| 70.9 to 76.8 |
| Manganese (Mn), % | 0 to 1.5 | |
| 0 to 1.0 |
| Nickel (Ni), % | 0 | |
| 6.5 to 7.8 |
| Phosphorus (P), % | 0 to 0.040 | |
| 0 to 0.040 |
| Silicon (Si), % | 0 to 1.0 | |
| 0 to 0.7 |
| Sulfur (S), % | 0 to 0.015 | |
| 0 to 0.015 |