Stainless hlau qib 904L - Super Austenitic Anti-Corrosion
Mar 23, 2026
Tso lus
Nominal Chemical Composition ntawm 904L (UNS N08904)Stainless hlau
| Lub ntsiab | Cim | Cov ntsiab lus raug (wt.%) | Muaj nuj nqi / Lub luag haujlwm |
| Hlau | Fe | Qhov nyiaj tshuav (~50.0–55.0%) | Base matrix ntawm alloy; txhawb nqa tag nrho cov ntsiab lus alloying |
| Chromium | Cr | 19.0-23.0 Nws | Txhawb nqa passivation; txhim kho tsis kam mus rau dav dav thiab localized corrosion |
| Nickel | Ni | 23.0-28.0 Nws | Stabilizes austenitic theem; nce ductility thiab chloride SCC kuj |
| Molybdenum | Mo | 4.0–5.0 | Txhim kho pitting thiab crevice corrosion kuj (PREN boost) |
| Tooj | Cu | 1.0-2.0 Nws | Ua kom muaj zog tiv thaiv tsis yog -oxidizing acids (piv txwv li, H₂SO₄, H₃PO₄) |
| Cov pa roj carbon | C | ≤ 0.02 | Minimizes carbide nag lossis daus; tiv thaiv rhiab heev |
| Manganese | Mn | ≤ 2.0 | Deoxidizer; pab nyob rau hauv sulfur kuj thiab kub workability |
| Silicon | Si | ≤ 1.0 | Txhim kho oxidation tsis kam; siv los ua deoxidizer hauv steelmaking |
| Phosphorus | P | ≤ 0.045 | Cov khoom seem; khaws cia kom tsis txhob embrittlement |
| Sulfur | S | ≤ 0.035 | Cov khoom seem; minimized los tswj ductility thiab corrosion kev ua tau zoo |
| Nitrogen | N | ≤ 0.10 | Ua kom muaj zog austenitic matrix; txhim kho pitting kuj |
Xa kev nug