S21904 Stainless Steel vs. AISI 205 Stainless Steel
Both S21904 stainless steel and AISI 205 stainless steel are iron alloys. They have a moderately high 92% of their average alloy composition in common. There are 29 material properties with values for both materials. Properties with values for just one material (4, in this case) are not shown.
For each property being compared, the top bar is S21904 stainless steel and the bottom bar is AISI 205 stainless steel.
Metric UnitsUS Customary Units
Mechanical Properties
| Brinell Hardness | 210 to 300 | |
| 210 to 440 |
| Elastic (Young's, Tensile) Modulus, GPa | 200 | |
| 200 |
| Elongation at Break, % | 17 to 51 | |
| 11 to 51 |
| Fatigue Strength, MPa | 380 to 550 | |
| 410 to 640 |
| Poisson's Ratio | 0.28 | |
| 0.28 |
| Shear Modulus, GPa | 78 | |
| 77 |
| Shear Strength, MPa | 510 to 620 | |
| 560 to 850 |
| Tensile Strength: Ultimate (UTS), MPa | 700 to 1000 | |
| 800 to 1430 |
| Tensile Strength: Yield (Proof), MPa | 390 to 910 | |
| 450 to 1100 |
Thermal Properties
| Latent Heat of Fusion, J/g | 290 | |
| 280 |
| Maximum Temperature: Corrosion, °C | 430 | |
| 410 |
| Maximum Temperature: Mechanical, °C | 980 | |
| 880 |
| Melting Completion (Liquidus), °C | 1400 | |
| 1380 |
| Melting Onset (Solidus), °C | 1350 | |
| 1340 |
| Specific Heat Capacity, J/kg-K | 480 | |
| 480 |
| Thermal Expansion, µm/m-K | 17 | |
| 18 |
Otherwise Unclassified Properties
| Base Metal Price, % relative | 15 | |
| 11 |
| Density, g/cm3 | 7.7 | |
| 7.6 |
| Embodied Carbon, kg CO2/kg material | 3.0 | |
| 2.6 |
| Embodied Energy, MJ/kg | 43 | |
| 37 |
| Embodied Water, L/kg | 160 | |
| 150 |
Common Calculations
| PREN (Pitting Resistance) | 25 | |
| 23 |
| Resilience: Ultimate (Unit Rupture Work), MJ/m3 | 160 to 310 | |
| 150 to 430 |
| Resilience: Unit (Modulus of Resilience), kJ/m3 | 380 to 2070 | |
| 510 to 3060 |
| Stiffness to Weight: Axial, points | 14 | |
| 14 |
| Stiffness to Weight: Bending, points | 25 | |
| 26 |
| Strength to Weight: Axial, points | 25 to 36 | |
| 29 to 52 |
| Strength to Weight: Bending, points | 23 to 29 | |
| 25 to 37 |
| Thermal Shock Resistance, points | 15 to 21 | |
| 16 to 29 |
Alloy Composition
| Carbon (C), % | 0 to 0.040 | |
| 0.12 to 0.25 |
| Chromium (Cr), % | 19 to 21.5 | |
| 16.5 to 18.5 |
| Iron (Fe), % | 59.5 to 67.4 | |
| 62.6 to 68.1 |
| Manganese (Mn), % | 8.0 to 10 | |
| 14 to 15.5 |
| Nickel (Ni), % | 5.5 to 7.5 | |
| 1.0 to 1.7 |
| Nitrogen (N), % | 0.15 to 0.4 | |
| 0.32 to 0.4 |
| 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 |