AISI 321 Stainless Steel vs. EN 1.4421 Stainless Steel
Both AISI 321 stainless steel and EN 1.4421 stainless steel are iron alloys. They have a moderately high 92% of their average alloy composition in common. There are 31 material properties with values for both materials. Properties with values for just one material (3, in this case) are not shown.
For each property being compared, the top bar is AISI 321 stainless steel and the bottom bar is EN 1.4421 stainless steel.
Metric UnitsUS Customary Units
Mechanical Properties
| Elastic (Young's, Tensile) Modulus, GPa | 200 | |
| 200 |
| Elongation at Break, % | 34 to 50 | |
| 11 to 17 |
| Fatigue Strength, MPa | 220 to 270 | |
| 380 to 520 |
| Poisson's Ratio | 0.28 | |
| 0.28 |
| Shear Modulus, GPa | 77 | |
| 77 |
| Tensile Strength: Ultimate (UTS), MPa | 590 to 690 | |
| 880 to 1100 |
| Tensile Strength: Yield (Proof), MPa | 220 to 350 | |
| 620 to 950 |
Thermal Properties
| Latent Heat of Fusion, J/g | 290 | |
| 280 |
| Maximum Temperature: Corrosion, °C | 480 | |
| 410 |
| Maximum Temperature: Mechanical, °C | 870 | |
| 870 |
| Melting Completion (Liquidus), °C | 1430 | |
| 1440 |
| Melting Onset (Solidus), °C | 1400 | |
| 1400 |
| Specific Heat Capacity, J/kg-K | 480 | |
| 480 |
| Thermal Conductivity, W/m-K | 16 | |
| 16 |
| Thermal Expansion, µm/m-K | 17 | |
| 10 |
Electrical Properties
| Electrical Conductivity: Equal Volume, % IACS | 2.4 | |
| 2.2 |
| Electrical Conductivity: Equal Weight (Specific), % IACS | 2.7 | |
| 2.5 |
Otherwise Unclassified Properties
| Base Metal Price, % relative | 16 | |
| 12 |
| Density, g/cm3 | 7.8 | |
| 7.8 |
| Embodied Carbon, kg CO2/kg material | 3.2 | |
| 2.6 |
| Embodied Energy, MJ/kg | 45 | |
| 36 |
| Embodied Water, L/kg | 140 | |
| 130 |
Common Calculations
| PREN (Pitting Resistance) | 19 | |
| 18 |
| Resilience: Ultimate (Unit Rupture Work), MJ/m3 | 190 to 230 | |
| 120 to 140 |
| Resilience: Unit (Modulus of Resilience), kJ/m3 | 130 to 310 | |
| 960 to 2270 |
| Stiffness to Weight: Axial, points | 14 | |
| 14 |
| Stiffness to Weight: Bending, points | 25 | |
| 25 |
| Strength to Weight: Axial, points | 21 to 25 | |
| 31 to 39 |
| Strength to Weight: Bending, points | 20 to 22 | |
| 26 to 30 |
| Thermal Diffusivity, mm2/s | 4.1 | |
| 4.4 |
| Thermal Shock Resistance, points | 13 to 15 | |
| 31 to 39 |
Alloy Composition
| Carbon (C), % | 0 to 0.080 | |
| 0 to 0.060 |
| Chromium (Cr), % | 17 to 19 | |
| 15.5 to 17.5 |
| Iron (Fe), % | 65.3 to 74 | |
| 74.4 to 80.5 |
| Manganese (Mn), % | 0 to 2.0 | |
| 0 to 1.0 |
| Molybdenum (Mo), % | 0 | |
| 0 to 0.7 |
| Nickel (Ni), % | 9.0 to 12 | |
| 4.0 to 5.5 |
| Nitrogen (N), % | 0 to 0.1 | |
| 0 |
| Phosphorus (P), % | 0 to 0.045 | |
| 0 to 0.035 |
| Silicon (Si), % | 0 to 0.75 | |
| 0 to 0.8 |
| Sulfur (S), % | 0 to 0.030 | |
| 0 to 0.020 |
| Titanium (Ti), % | 0 to 0.7 | |
| 0 |