EN 1.4021 Stainless Steel vs. AISI 420 Stainless Steel
Both EN 1.4021 stainless steel and AISI 420 stainless steel are iron alloys. Their average alloy composition is basically identical. There are 32 material properties with values for both materials. Properties with values for just one material (2, in this case) are not shown.
For each property being compared, the top bar is EN 1.4021 stainless steel and the bottom bar is AISI 420 stainless steel.
Metric UnitsUS Customary Units
Mechanical Properties
| Elastic (Young's, Tensile) Modulus, GPa | 190 | |
| 190 |
| Elongation at Break, % | 11 to 17 | |
| 8.0 to 15 |
| 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 | |
| 420 to 1010 |
| Tensile Strength: Ultimate (UTS), MPa | 630 to 880 | |
| 690 to 1720 |
| Tensile Strength: Yield (Proof), MPa | 390 to 670 | |
| 380 to 1310 |
Thermal Properties
| Latent Heat of Fusion, J/g | 270 | |
| 280 |
| Maximum Temperature: Corrosion, °C | 390 | |
| 390 |
| Maximum Temperature: Mechanical, °C | 760 | |
| 620 |
| Melting Completion (Liquidus), °C | 1440 | |
| 1510 |
| Melting Onset (Solidus), °C | 1400 | |
| 1450 |
| Specific Heat Capacity, J/kg-K | 480 | |
| 480 |
| Thermal Conductivity, W/m-K | 30 | |
| 27 |
| Thermal Expansion, µm/m-K | 11 | |
| 10 |
Electrical Properties
| Electrical Conductivity: Equal Volume, % IACS | 2.9 | |
| 3.0 |
| Electrical Conductivity: Equal Weight (Specific), % IACS | 3.3 | |
| 3.5 |
Otherwise Unclassified Properties
| Base Metal Price, % relative | 7.0 | |
| 7.5 |
| Density, g/cm3 | 7.7 | |
| 7.7 |
| Embodied Carbon, kg CO2/kg material | 1.9 | |
| 2.0 |
| Embodied Energy, MJ/kg | 27 | |
| 28 |
| Embodied Water, L/kg | 100 | |
| 100 |
Common Calculations
| PREN (Pitting Resistance) | 13 | |
| 14 |
| Resilience: Ultimate (Unit Rupture Work), MJ/m3 | 88 to 110 | |
| 88 to 130 |
| Resilience: Unit (Modulus of Resilience), kJ/m3 | 400 to 1160 | |
| 380 to 4410 |
| Stiffness to Weight: Axial, points | 14 | |
| 14 |
| Stiffness to Weight: Bending, points | 25 | |
| 25 |
| Strength to Weight: Axial, points | 23 to 31 | |
| 25 to 62 |
| Strength to Weight: Bending, points | 21 to 26 | |
| 22 to 41 |
| Thermal Diffusivity, mm2/s | 8.1 | |
| 7.3 |
| Thermal Shock Resistance, points | 22 to 31 | |
| 25 to 62 |
Alloy Composition
| Carbon (C), % | 0.16 to 0.25 | |
| 0.15 to 0.4 |
| Chromium (Cr), % | 12 to 14 | |
| 12 to 14 |
| Iron (Fe), % | 83.2 to 87.8 | |
| 82.3 to 87.9 |
| Manganese (Mn), % | 0 to 1.5 | |
| 0 to 1.0 |
| Molybdenum (Mo), % | 0 | |
| 0 to 0.5 |
| Nickel (Ni), % | 0 | |
| 0 to 0.75 |
| Phosphorus (P), % | 0 to 0.040 | |
| 0 to 0.040 |
| Silicon (Si), % | 0 to 1.0 | |
| 0 to 1.0 |
| Sulfur (S), % | 0 to 0.015 | |
| 0 to 0.030 |