AISI 201LN Stainless Steel vs. S21904 Stainless Steel
Both AISI 201LN stainless steel and S21904 stainless steel are iron alloys. They have a moderately high 92% of their average alloy composition in common.
For each property being compared, the top bar is AISI 201LN stainless steel and the bottom bar is S21904 stainless steel.
Metric UnitsUS Customary Units
Mechanical Properties
| Brinell Hardness | 210 to 320 | |
| 210 to 300 |
| Elastic (Young's, Tensile) Modulus, GPa | 200 | |
| 200 |
| Elongation at Break, % | 25 to 51 | |
| 17 to 51 |
| Fatigue Strength, MPa | 340 to 540 | |
| 380 to 550 |
| Poisson's Ratio | 0.28 | |
| 0.28 |
| Shear Modulus, GPa | 77 | |
| 78 |
| Shear Strength, MPa | 530 to 680 | |
| 510 to 620 |
| Tensile Strength: Ultimate (UTS), MPa | 740 to 1060 | |
| 700 to 1000 |
| Tensile Strength: Yield (Proof), MPa | 350 to 770 | |
| 390 to 910 |
Thermal Properties
| Latent Heat of Fusion, J/g | 280 | |
| 290 |
| Maximum Temperature: Corrosion, °C | 410 | |
| 430 |
| Maximum Temperature: Mechanical, °C | 880 | |
| 980 |
| Melting Completion (Liquidus), °C | 1410 | |
| 1400 |
| Melting Onset (Solidus), °C | 1370 | |
| 1350 |
| Specific Heat Capacity, J/kg-K | 480 | |
| 480 |
| Thermal Conductivity, W/m-K | 15 | |
| 14 |
| Thermal Expansion, µm/m-K | 17 | |
| 17 |
Electrical Properties
| Electrical Conductivity: Equal Volume, % IACS | 2.4 | |
| 2.5 |
| Electrical Conductivity: Equal Weight (Specific), % IACS | 2.9 | |
| 2.9 |
Otherwise Unclassified Properties
| Base Metal Price, % relative | 12 | |
| 15 |
| Density, g/cm3 | 7.7 | |
| 7.7 |
| Embodied Carbon, kg CO2/kg material | 2.6 | |
| 3.0 |
| Embodied Energy, MJ/kg | 38 | |
| 43 |
| Embodied Water, L/kg | 140 | |
| 160 |
Common Calculations
| PREN (Pitting Resistance) | 20 | |
| 25 |
| Resilience: Ultimate (Unit Rupture Work), MJ/m3 | 230 to 310 | |
| 160 to 310 |
| Resilience: Unit (Modulus of Resilience), kJ/m3 | 310 to 1520 | |
| 380 to 2070 |
| Stiffness to Weight: Axial, points | 14 | |
| 14 |
| Stiffness to Weight: Bending, points | 25 | |
| 25 |
| Strength to Weight: Axial, points | 27 to 38 | |
| 25 to 36 |
| Strength to Weight: Bending, points | 24 to 30 | |
| 23 to 29 |
| Thermal Diffusivity, mm2/s | 4.0 | |
| 3.8 |
| Thermal Shock Resistance, points | 16 to 23 | |
| 15 to 21 |
Alloy Composition
| Carbon (C), % | 0 to 0.030 | |
| 0 to 0.040 |
| Chromium (Cr), % | 16 to 17.5 | |
| 19 to 21.5 |
| Copper (Cu), % | 0 to 1.0 | |
| 0 |
| Iron (Fe), % | 67.9 to 73.5 | |
| 59.5 to 67.4 |
| Manganese (Mn), % | 6.4 to 7.5 | |
| 8.0 to 10 |
| Nickel (Ni), % | 4.0 to 5.0 | |
| 5.5 to 7.5 |
| Nitrogen (N), % | 0.1 to 0.25 | |
| 0.15 to 0.4 |
| Phosphorus (P), % | 0 to 0.045 | |
| 0 to 0.045 |
| Silicon (Si), % | 0 to 0.75 | |
| 0 to 1.0 |
| Sulfur (S), % | 0 to 0.015 | |
| 0 to 0.030 |