AISI 321 Stainless Steel vs. S20910 Stainless Steel
Both AISI 321 stainless steel and S20910 stainless steel are iron alloys. They have 87% 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 AISI 321 stainless steel and the bottom bar is S20910 stainless steel.
Metric UnitsUS Customary Units
Mechanical Properties
| Brinell Hardness | 170 to 210 | |
| 230 to 290 |
| Elastic (Young's, Tensile) Modulus, GPa | 200 | |
| 200 |
| Elongation at Break, % | 34 to 50 | |
| 14 to 39 |
| Fatigue Strength, MPa | 220 to 270 | |
| 310 to 460 |
| Poisson's Ratio | 0.28 | |
| 0.28 |
| Shear Modulus, GPa | 77 | |
| 79 |
| Shear Strength, MPa | 420 to 460 | |
| 500 to 570 |
| Tensile Strength: Ultimate (UTS), MPa | 590 to 690 | |
| 780 to 940 |
| Tensile Strength: Yield (Proof), MPa | 220 to 350 | |
| 430 to 810 |
Thermal Properties
| Latent Heat of Fusion, J/g | 290 | |
| 300 |
| Maximum Temperature: Corrosion, °C | 480 | |
| 460 |
| Maximum Temperature: Mechanical, °C | 870 | |
| 1080 |
| Melting Completion (Liquidus), °C | 1430 | |
| 1420 |
| Melting Onset (Solidus), °C | 1400 | |
| 1380 |
| Specific Heat Capacity, J/kg-K | 480 | |
| 480 |
| Thermal Conductivity, W/m-K | 16 | |
| 13 |
| Thermal Expansion, µm/m-K | 17 | |
| 16 |
Otherwise Unclassified Properties
| Base Metal Price, % relative | 16 | |
| 22 |
| Density, g/cm3 | 7.8 | |
| 7.8 |
| Embodied Carbon, kg CO2/kg material | 3.2 | |
| 4.8 |
| Embodied Energy, MJ/kg | 45 | |
| 68 |
| Embodied Water, L/kg | 140 | |
| 180 |
Common Calculations
| PREN (Pitting Resistance) | 19 | |
| 34 |
| Resilience: Ultimate (Unit Rupture Work), MJ/m3 | 190 to 230 | |
| 120 to 260 |
| Resilience: Unit (Modulus of Resilience), kJ/m3 | 130 to 310 | |
| 460 to 1640 |
| Stiffness to Weight: Axial, points | 14 | |
| 14 |
| Stiffness to Weight: Bending, points | 25 | |
| 25 |
| Strength to Weight: Axial, points | 21 to 25 | |
| 28 to 33 |
| Strength to Weight: Bending, points | 20 to 22 | |
| 24 to 27 |
| Thermal Diffusivity, mm2/s | 4.1 | |
| 3.6 |
| Thermal Shock Resistance, points | 13 to 15 | |
| 17 to 21 |
Alloy Composition
| Carbon (C), % | 0 to 0.080 | |
| 0 to 0.060 |
| Chromium (Cr), % | 17 to 19 | |
| 20.5 to 23.5 |
| Iron (Fe), % | 65.3 to 74 | |
| 52.1 to 62.1 |
| Manganese (Mn), % | 0 to 2.0 | |
| 4.0 to 6.0 |
| Molybdenum (Mo), % | 0 | |
| 1.5 to 3.0 |
| Nickel (Ni), % | 9.0 to 12 | |
| 11.5 to 13.5 |
| Niobium (Nb), % | 0 | |
| 0.1 to 0.3 |
| Nitrogen (N), % | 0 to 0.1 | |
| 0.2 to 0.4 |
| Phosphorus (P), % | 0 to 0.045 | |
| 0 to 0.040 |
| Silicon (Si), % | 0 to 0.75 | |
| 0 to 0.75 |
| Sulfur (S), % | 0 to 0.030 | |
| 0 to 0.030 |
| Titanium (Ti), % | 0 to 0.7 | |
| 0 |
| Vanadium (V), % | 0 | |
| 0.1 to 0.3 |