S21904 Stainless Steel vs. AISI 305 Stainless Steel
Both S21904 stainless steel and AISI 305 stainless steel are iron alloys. They have 89% of their average alloy composition in common. There are 33 material properties with values for both materials. Properties with values for just one material (1, in this case) are not shown.
For each property being compared, the top bar is S21904 stainless steel and the bottom bar is AISI 305 stainless steel.
Metric UnitsUS Customary Units
Mechanical Properties
| Brinell Hardness | 210 to 300 | |
| 170 to 220 |
| Elastic (Young's, Tensile) Modulus, GPa | 200 | |
| 200 |
| Elongation at Break, % | 17 to 51 | |
| 34 to 45 |
| Fatigue Strength, MPa | 380 to 550 | |
| 210 to 280 |
| Poisson's Ratio | 0.28 | |
| 0.28 |
| Shear Modulus, GPa | 78 | |
| 77 |
| Shear Strength, MPa | 510 to 620 | |
| 400 to 470 |
| Tensile Strength: Ultimate (UTS), MPa | 700 to 1000 | |
| 580 to 710 |
| Tensile Strength: Yield (Proof), MPa | 390 to 910 | |
| 230 to 350 |
Thermal Properties
| Latent Heat of Fusion, J/g | 290 | |
| 290 |
| Maximum Temperature: Corrosion, °C | 430 | |
| 410 |
| Maximum Temperature: Mechanical, °C | 980 | |
| 540 |
| Melting Completion (Liquidus), °C | 1400 | |
| 1450 |
| Melting Onset (Solidus), °C | 1350 | |
| 1400 |
| Specific Heat Capacity, J/kg-K | 480 | |
| 480 |
| Thermal Conductivity, W/m-K | 14 | |
| 16 |
| 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 | |
| 2.7 |
Otherwise Unclassified Properties
| Base Metal Price, % relative | 15 | |
| 16 |
| Density, g/cm3 | 7.7 | |
| 7.8 |
| Embodied Carbon, kg CO2/kg material | 3.0 | |
| 3.2 |
| Embodied Energy, MJ/kg | 43 | |
| 45 |
| Embodied Water, L/kg | 160 | |
| 150 |
Common Calculations
| PREN (Pitting Resistance) | 25 | |
| 18 |
| Resilience: Ultimate (Unit Rupture Work), MJ/m3 | 160 to 310 | |
| 200 to 210 |
| Resilience: Unit (Modulus of Resilience), kJ/m3 | 380 to 2070 | |
| 130 to 320 |
| Stiffness to Weight: Axial, points | 14 | |
| 14 |
| Stiffness to Weight: Bending, points | 25 | |
| 25 |
| Strength to Weight: Axial, points | 25 to 36 | |
| 20 to 25 |
| Strength to Weight: Bending, points | 23 to 29 | |
| 20 to 23 |
| Thermal Diffusivity, mm2/s | 3.8 | |
| 4.2 |
| Thermal Shock Resistance, points | 15 to 21 | |
| 13 to 15 |
Alloy Composition
| Carbon (C), % | 0 to 0.040 | |
| 0 to 0.12 |
| Chromium (Cr), % | 19 to 21.5 | |
| 17 to 19 |
| Iron (Fe), % | 59.5 to 67.4 | |
| 65.1 to 72.5 |
| Manganese (Mn), % | 8.0 to 10 | |
| 0 to 2.0 |
| Nickel (Ni), % | 5.5 to 7.5 | |
| 10.5 to 13 |
| Nitrogen (N), % | 0.15 to 0.4 | |
| 0 |
| Phosphorus (P), % | 0 to 0.045 | |
| 0 to 0.045 |
| Silicon (Si), % | 0 to 1.0 | |
| 0 to 0.75 |
| Sulfur (S), % | 0 to 0.030 | |
| 0 to 0.030 |