UNS S44735 alloy yog superferritic stainless hlau tsim los ntawm Allegheny Ludlum kom muaj kev tiv thaiv huab cua rau chloride ion pitting, crevice corrosion, thiab kev ntxhov siab corrosion tawg, nrog rau kev xeb dav dav hauv oxidizing thiab txo qis ib puag ncig.
Lub alloy tau tsim nyob rau hauv thaum ntxov 1980s rau welded condenser raj siv nyob rau hauv seawater thiab brackish dej nyob rau hauv lub tsim hluav taws xob kev lag luam. Qhov kev tiv thaiv tsis zoo rau pitting thiab crevice corrosion tau ua rau kev teeb tsa ntau dua 2, 000 mais ntawm UNS S44735 tubing hauv lub zog cog condensers thiab cov khoom siv hluav taws xob.
| physiological zog | Kev ntsuas |
| Qhov ntom | 7.67 g/m² |
Chemical Composition Limits
Cov ntsiab lus Properties
| Carbon, C | 0.020 feem pua |
| Chromium, Cr | 29% |
| Hlau, Fe | 65% |
| Manganese, Mn | 0.50% |
| Molybdenum, Mo | 4.0 feem pua |
| Nickel, Nia | 0.30 feem pua |
| Niobium, Nb (Columbium, Cb) | 0.60 feem pua |
| Nitrogen, N | 0.020 feem pua |
| phosphorus, P | 0.030 feem pua |
| silicon, yog | 0.35 feem pua |
| Sulfur, S | <= 0.010=""> |
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Qhov kev tiv thaiv no ua rau nws yog qhov kev xaiv zoo tshaj plaws rau kev sib ntaus sib tua corrosive condensate los ntawm ib nrab thiab tag nrho condensing natural gas thiab propane khoom. Nws cov ntsiab lus tsis tshua muaj alloy, piv rau lwm cov kev ua tau zoo alloys, ua rau nws xaiv kev lag luam thiab.
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