S21904 Stainless Steel vs. AISI 202 Stainless Steel
Both S21904 stainless steel and AISI 202 stainless steel are iron alloys. They have a very high 96% of their average alloy composition in common.
For each property being compared, the top bar is S21904 stainless steel and the bottom bar is AISI 202 stainless steel.
Metric UnitsUS Customary Units
Mechanical Properties
| Brinell Hardness | 210 to 300 | |
| 210 to 300 |
| Elastic (Young's, Tensile) Modulus, GPa | 200 | |
| 200 |
| Elongation at Break, % | 17 to 51 | |
| 14 to 45 |
| Fatigue Strength, MPa | 380 to 550 | |
| 290 to 330 |
| Poisson's Ratio | 0.28 | |
| 0.28 |
| Shear Modulus, GPa | 78 | |
| 77 |
| Shear Strength, MPa | 510 to 620 | |
| 490 to 590 |
| Tensile Strength: Ultimate (UTS), MPa | 700 to 1000 | |
| 700 to 980 |
| Tensile Strength: Yield (Proof), MPa | 390 to 910 | |
| 310 to 580 |
Thermal Properties
| Latent Heat of Fusion, J/g | 290 | |
| 290 |
| Maximum Temperature: Corrosion, °C | 430 | |
| 410 |
| Maximum Temperature: Mechanical, °C | 980 | |
| 910 |
| Melting Completion (Liquidus), °C | 1400 | |
| 1400 |
| Melting Onset (Solidus), °C | 1350 | |
| 1360 |
| Specific Heat Capacity, J/kg-K | 480 | |
| 480 |
| Thermal Conductivity, W/m-K | 14 | |
| 15 |
| Thermal Expansion, µm/m-K | 17 | |
| 17 |
Electrical Properties
| Electrical Conductivity: Equal Volume, % IACS | 2.5 | |
| 2.4 |
| Electrical Conductivity: Equal Weight (Specific), % IACS | 2.9 | |
| 2.9 |
Otherwise Unclassified Properties
| Base Metal Price, % relative | 15 | |
| 13 |
| Density, g/cm3 | 7.7 | |
| 7.7 |
| Embodied Carbon, kg CO2/kg material | 3.0 | |
| 2.8 |
| Embodied Energy, MJ/kg | 43 | |
| 40 |
| Embodied Water, L/kg | 160 | |
| 150 |
Common Calculations
| PREN (Pitting Resistance) | 25 | |
| 20 |
| Resilience: Ultimate (Unit Rupture Work), MJ/m3 | 160 to 310 | |
| 120 to 260 |
| Resilience: Unit (Modulus of Resilience), kJ/m3 | 380 to 2070 | |
| 250 to 840 |
| Stiffness to Weight: Axial, points | 14 | |
| 14 |
| Stiffness to Weight: Bending, points | 25 | |
| 25 |
| Strength to Weight: Axial, points | 25 to 36 | |
| 25 to 35 |
| Strength to Weight: Bending, points | 23 to 29 | |
| 23 to 29 |
| Thermal Diffusivity, mm2/s | 3.8 | |
| 4.0 |
| Thermal Shock Resistance, points | 15 to 21 | |
| 15 to 21 |
Alloy Composition
| Carbon (C), % | 0 to 0.040 | |
| 0 to 0.15 |
| Chromium (Cr), % | 19 to 21.5 | |
| 17 to 19 |
| Iron (Fe), % | 59.5 to 67.4 | |
| 63.5 to 71.5 |
| Manganese (Mn), % | 8.0 to 10 | |
| 7.5 to 10 |
| Nickel (Ni), % | 5.5 to 7.5 | |
| 4.0 to 6.0 |
| Nitrogen (N), % | 0.15 to 0.4 | |
| 0 to 0.25 |
| Phosphorus (P), % | 0 to 0.045 | |
| 0 to 0.060 |
| Silicon (Si), % | 0 to 1.0 | |
| 0 to 1.0 |
| Sulfur (S), % | 0 to 0.030 | |
| 0 to 0.030 |