S81921 Stainless Steel vs. EN 1.4729 Stainless Steel
Both S81921 stainless steel and EN 1.4729 stainless steel are iron alloys. Both are furnished in the annealed condition. They have 86% of their average alloy composition in common. There are 24 material properties with values for both materials. Properties with values for just one material (10, in this case) are not shown.
For each property being compared, the top bar is S81921 stainless steel and the bottom bar is EN 1.4729 stainless steel.
Metric UnitsUS Customary Units
Mechanical Properties
| Brinell Hardness | 260 | |
| 260 |
| Elastic (Young's, Tensile) Modulus, GPa | 200 | |
| 190 |
| Elongation at Break, % | 29 | |
| 15 |
| Poisson's Ratio | 0.28 | |
| 0.28 |
| Shear Modulus, GPa | 79 | |
| 75 |
Thermal Properties
| Latent Heat of Fusion, J/g | 290 | |
| 300 |
| Maximum Temperature: Corrosion, °C | 430 | |
| 390 |
| Maximum Temperature: Mechanical, °C | 990 | |
| 850 |
| Melting Completion (Liquidus), °C | 1430 | |
| 1420 |
| Melting Onset (Solidus), °C | 1390 | |
| 1380 |
| Specific Heat Capacity, J/kg-K | 480 | |
| 490 |
| Thermal Conductivity, W/m-K | 15 | |
| 24 |
| Thermal Expansion, µm/m-K | 13 | |
| 10 |
Electrical Properties
| Electrical Conductivity: Equal Volume, % IACS | 2.2 | |
| 2.8 |
| Electrical Conductivity: Equal Weight (Specific), % IACS | 2.5 | |
| 3.3 |
Otherwise Unclassified Properties
| Base Metal Price, % relative | 14 | |
| 7.5 |
| Density, g/cm3 | 7.7 | |
| 7.6 |
| 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 | |
| 14 |
| Stiffness to Weight: Axial, points | 14 | |
| 14 |
| Stiffness to Weight: Bending, points | 25 | |
| 25 |
| Thermal Diffusivity, mm2/s | 4.0 | |
| 6.5 |
Alloy Composition
| Carbon (C), % | 0 to 0.030 | |
| 0.3 to 0.5 |
| Chromium (Cr), % | 19 to 22 | |
| 12 to 14 |
| Iron (Fe), % | 66.7 to 75.9 | |
| 80.4 to 86.7 |
| Manganese (Mn), % | 2.0 to 4.0 | |
| 0 to 1.0 |
| Molybdenum (Mo), % | 1.0 to 2.0 | |
| 0 to 0.5 |
| Nickel (Ni), % | 2.0 to 4.0 | |
| 0 to 1.0 |
| Nitrogen (N), % | 0.14 to 0.2 | |
| 0 |
| Phosphorus (P), % | 0 to 0.040 | |
| 0 to 0.040 |
| Silicon (Si), % | 0 to 1.0 | |
| 1.0 to 2.5 |
| Sulfur (S), % | 0 to 0.030 | |
| 0 to 0.030 |