AISI 304LN Stainless Steel vs. S21640 Stainless Steel
Both AISI 304LN stainless steel and S21640 stainless steel are iron alloys. They have a moderately high 94% of their average alloy composition in common.
For each property being compared, the top bar is AISI 304LN stainless steel and the bottom bar is S21640 stainless steel.
Metric UnitsUS Customary Units
Mechanical Properties
| Brinell Hardness | 190 to 350 | |
| 230 |
| Elastic (Young's, Tensile) Modulus, GPa | 200 | |
| 200 |
| Elongation at Break, % | 7.8 to 46 | |
| 46 |
| Fatigue Strength, MPa | 200 to 440 | |
| 320 |
| Poisson's Ratio | 0.28 | |
| 0.28 |
| Shear Modulus, GPa | 77 | |
| 78 |
| Shear Strength, MPa | 400 to 680 | |
| 520 |
| Tensile Strength: Ultimate (UTS), MPa | 580 to 1160 | |
| 740 |
| Tensile Strength: Yield (Proof), MPa | 230 to 870 | |
| 350 |
Thermal Properties
| Latent Heat of Fusion, J/g | 290 | |
| 290 |
| Maximum Temperature: Corrosion, °C | 420 | |
| 490 |
| Maximum Temperature: Mechanical, °C | 960 | |
| 940 |
| Melting Completion (Liquidus), °C | 1420 | |
| 1430 |
| Melting Onset (Solidus), °C | 1380 | |
| 1380 |
| Specific Heat Capacity, J/kg-K | 480 | |
| 480 |
| Thermal Conductivity, W/m-K | 15 | |
| 15 |
| Thermal Expansion, µm/m-K | 16 | |
| 17 |
Electrical Properties
| Electrical Conductivity: Equal Volume, % IACS | 2.4 | |
| 2.4 |
| Electrical Conductivity: Equal Weight (Specific), % IACS | 2.7 | |
| 2.8 |
Otherwise Unclassified Properties
| Base Metal Price, % relative | 16 | |
| 17 |
| Density, g/cm3 | 7.8 | |
| 7.7 |
| Embodied Carbon, kg CO2/kg material | 3.1 | |
| 3.6 |
| Embodied Energy, MJ/kg | 44 | |
| 51 |
| Embodied Water, L/kg | 150 | |
| 150 |
Common Calculations
| PREN (Pitting Resistance) | 21 | |
| 26 |
| Resilience: Ultimate (Unit Rupture Work), MJ/m3 | 83 to 270 | |
| 280 |
| Resilience: Unit (Modulus of Resilience), kJ/m3 | 140 to 1900 | |
| 300 |
| Stiffness to Weight: Axial, points | 14 | |
| 14 |
| Stiffness to Weight: Bending, points | 25 | |
| 25 |
| Strength to Weight: Axial, points | 21 to 41 | |
| 27 |
| Strength to Weight: Bending, points | 20 to 31 | |
| 23 |
| Thermal Diffusivity, mm2/s | 4.0 | |
| 4.0 |
| Thermal Shock Resistance, points | 13 to 26 | |
| 16 |
Alloy Composition
| Carbon (C), % | 0 to 0.030 | |
| 0 to 0.080 |
| Chromium (Cr), % | 18 to 20 | |
| 17.5 to 19.5 |
| Iron (Fe), % | 65 to 73.9 | |
| 63 to 74.3 |
| Manganese (Mn), % | 0 to 2.0 | |
| 3.5 to 6.5 |
| Molybdenum (Mo), % | 0 | |
| 0.5 to 2.0 |
| Nickel (Ni), % | 8.0 to 12 | |
| 4.0 to 6.5 |
| Niobium (Nb), % | 0 | |
| 0.1 to 1.0 |
| Nitrogen (N), % | 0.1 to 0.16 | |
| 0.080 to 0.3 |
| Phosphorus (P), % | 0 to 0.045 | |
| 0 to 0.060 |
| Silicon (Si), % | 0 to 0.75 | |
| 0 to 1.0 |
| Sulfur (S), % | 0 to 0.030 | |
| 0 to 0.030 |