S81921 Stainless Steel vs. AISI 414 Stainless Steel
Both S81921 stainless steel and AISI 414 stainless steel are iron alloys. They have 87% of their average alloy composition in common. There are 32 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 S81921 stainless steel and the bottom bar is AISI 414 stainless steel.
Metric UnitsUS Customary Units
Mechanical Properties
| Elastic (Young's, Tensile) Modulus, GPa | 200 | |
| 190 |
| Elongation at Break, % | 29 | |
| 17 |
| Fatigue Strength, MPa | 370 | |
| 430 to 480 |
| Poisson's Ratio | 0.28 | |
| 0.28 |
| Shear Modulus, GPa | 79 | |
| 76 |
| Shear Strength, MPa | 460 | |
| 550 to 590 |
| Tensile Strength: Ultimate (UTS), MPa | 710 | |
| 900 to 960 |
| Tensile Strength: Yield (Proof), MPa | 500 | |
| 700 to 790 |
Thermal Properties
| Latent Heat of Fusion, J/g | 290 | |
| 280 |
| Maximum Temperature: Corrosion, °C | 430 | |
| 390 |
| Maximum Temperature: Mechanical, °C | 990 | |
| 750 |
| Melting Completion (Liquidus), °C | 1430 | |
| 1440 |
| Melting Onset (Solidus), °C | 1390 | |
| 1400 |
| Specific Heat Capacity, J/kg-K | 480 | |
| 480 |
| Thermal Conductivity, W/m-K | 15 | |
| 25 |
| Thermal Expansion, µm/m-K | 13 | |
| 10 |
Electrical Properties
| Electrical Conductivity: Equal Volume, % IACS | 2.2 | |
| 2.5 |
| Electrical Conductivity: Equal Weight (Specific), % IACS | 2.5 | |
| 2.9 |
Otherwise Unclassified Properties
| Base Metal Price, % relative | 14 | |
| 8.0 |
| Density, g/cm3 | 7.7 | |
| 7.8 |
| Embodied Carbon, kg CO2/kg material | 2.9 | |
| 2.1 |
| Embodied Energy, MJ/kg | 41 | |
| 29 |
| Embodied Water, L/kg | 150 | |
| 100 |
Common Calculations
| PREN (Pitting Resistance) | 28 | |
| 13 |
| Resilience: Ultimate (Unit Rupture Work), MJ/m3 | 180 | |
| 140 to 150 |
| Resilience: Unit (Modulus of Resilience), kJ/m3 | 630 | |
| 1260 to 1590 |
| Stiffness to Weight: Axial, points | 14 | |
| 14 |
| Stiffness to Weight: Bending, points | 25 | |
| 25 |
| Strength to Weight: Axial, points | 25 | |
| 32 to 34 |
| Strength to Weight: Bending, points | 23 | |
| 27 to 28 |
| Thermal Diffusivity, mm2/s | 4.0 | |
| 6.7 |
| Thermal Shock Resistance, points | 20 | |
| 33 to 35 |
Alloy Composition
| Carbon (C), % | 0 to 0.030 | |
| 0 to 0.15 |
| Chromium (Cr), % | 19 to 22 | |
| 11.5 to 13.5 |
| Iron (Fe), % | 66.7 to 75.9 | |
| 81.8 to 87.3 |
| Manganese (Mn), % | 2.0 to 4.0 | |
| 0 to 1.0 |
| Molybdenum (Mo), % | 1.0 to 2.0 | |
| 0 |
| Nickel (Ni), % | 2.0 to 4.0 | |
| 1.3 to 2.5 |
| Nitrogen (N), % | 0.14 to 0.2 | |
| 0 |
| Phosphorus (P), % | 0 to 0.040 | |
| 0 to 0.040 |
| Silicon (Si), % | 0 to 1.0 | |
| 0 to 1.0 |
| Sulfur (S), % | 0 to 0.030 | |
| 0 to 0.030 |