S21904 Stainless Steel vs. S20910 Stainless Steel
Both S21904 stainless steel and S20910 stainless steel are iron alloys. They have 90% of their average alloy composition in common. There are 31 material properties with values for both materials. Properties with values for just one material (3, in this case) are not shown.
For each property being compared, the top bar is S21904 stainless steel and the bottom bar is S20910 stainless steel.
Metric UnitsUS Customary Units
Mechanical Properties
| Brinell Hardness | 210 to 300 | |
| 230 to 290 |
| Elastic (Young's, Tensile) Modulus, GPa | 200 | |
| 200 |
| Elongation at Break, % | 17 to 51 | |
| 14 to 39 |
| Fatigue Strength, MPa | 380 to 550 | |
| 310 to 460 |
| Poisson's Ratio | 0.28 | |
| 0.28 |
| Shear Modulus, GPa | 78 | |
| 79 |
| Shear Strength, MPa | 510 to 620 | |
| 500 to 570 |
| Tensile Strength: Ultimate (UTS), MPa | 700 to 1000 | |
| 780 to 940 |
| Tensile Strength: Yield (Proof), MPa | 390 to 910 | |
| 430 to 810 |
Thermal Properties
| Latent Heat of Fusion, J/g | 290 | |
| 300 |
| Maximum Temperature: Corrosion, °C | 430 | |
| 460 |
| Maximum Temperature: Mechanical, °C | 980 | |
| 1080 |
| Melting Completion (Liquidus), °C | 1400 | |
| 1420 |
| Melting Onset (Solidus), °C | 1350 | |
| 1380 |
| Specific Heat Capacity, J/kg-K | 480 | |
| 480 |
| Thermal Conductivity, W/m-K | 14 | |
| 13 |
| Thermal Expansion, µm/m-K | 17 | |
| 16 |
Otherwise Unclassified Properties
| Base Metal Price, % relative | 15 | |
| 22 |
| Density, g/cm3 | 7.7 | |
| 7.8 |
| Embodied Carbon, kg CO2/kg material | 3.0 | |
| 4.8 |
| Embodied Energy, MJ/kg | 43 | |
| 68 |
| Embodied Water, L/kg | 160 | |
| 180 |
Common Calculations
| PREN (Pitting Resistance) | 25 | |
| 34 |
| Resilience: Ultimate (Unit Rupture Work), MJ/m3 | 160 to 310 | |
| 120 to 260 |
| Resilience: Unit (Modulus of Resilience), kJ/m3 | 380 to 2070 | |
| 460 to 1640 |
| Stiffness to Weight: Axial, points | 14 | |
| 14 |
| Stiffness to Weight: Bending, points | 25 | |
| 25 |
| Strength to Weight: Axial, points | 25 to 36 | |
| 28 to 33 |
| Strength to Weight: Bending, points | 23 to 29 | |
| 24 to 27 |
| Thermal Diffusivity, mm2/s | 3.8 | |
| 3.6 |
| Thermal Shock Resistance, points | 15 to 21 | |
| 17 to 21 |
Alloy Composition
| Carbon (C), % | 0 to 0.040 | |
| 0 to 0.060 |
| Chromium (Cr), % | 19 to 21.5 | |
| 20.5 to 23.5 |
| Iron (Fe), % | 59.5 to 67.4 | |
| 52.1 to 62.1 |
| Manganese (Mn), % | 8.0 to 10 | |
| 4.0 to 6.0 |
| Molybdenum (Mo), % | 0 | |
| 1.5 to 3.0 |
| Nickel (Ni), % | 5.5 to 7.5 | |
| 11.5 to 13.5 |
| Niobium (Nb), % | 0 | |
| 0.1 to 0.3 |
| Nitrogen (N), % | 0.15 to 0.4 | |
| 0.2 to 0.4 |
| Phosphorus (P), % | 0 to 0.045 | |
| 0 to 0.040 |
| Silicon (Si), % | 0 to 1.0 | |
| 0 to 0.75 |
| Sulfur (S), % | 0 to 0.030 | |
| 0 to 0.030 |
| Vanadium (V), % | 0 | |
| 0.1 to 0.3 |