UNS S31254 / 254SMo Phaj Tube Qws Super Austenitic Stainless Hlau S31254
Cov khoom muaj
Seamless raj, phaj, pas nrig, forgings, fasteners, yeeb nkab fittings.
Cov qauv tsim
| Khoom | ASTM |
| Bars, strips thiab profiles | 276 Ib., 484 |
| Phaj, Sheet thiab Sawb | 240 Ib., 480 |
| Seamless thiab Welded Pipes | A 312, A 999 ib |
| Welded yeeb nkab | ib 814a999 |
| Seamless thiab Welded Yeeb Nkab Fittings | A 269, A 1016 |
| Fittings | ib 403a960 |
| Forged los yog dov yeeb nkab flanges thiab forged fittings | 182 Ib., 961 |
| Forgings | A473, A 484, ib |
Tshuaj muaj pes tsawg leeg
| % | Fe | Cr | Ni | Mo | C | Mn | Si | P | S | Cu | N |
| Min | sib npaug | 19.5 Nws | 17.50 Nws | 6.0 |
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| 0.5 | 0.18 |
| Max | 20.5 ib | 18.50 Nws | 6.5 | 0.02 ib | 1.00 Nws | 0.80 ib | 0.03 ib | 0.01 ib | 1.0 | 0.22 |
Lub cev muaj zog
| Qhov ntom | 8.24 g / cm3 |
| Melting | 1320-1390 ℃ |
254SM Cov Khoom Siv Khoom
254SMO yog austenitic stainless hlau.Vim nws cov ntsiab lus molybdenum siab, nws muaj qhov ua haujlwm siab heev rau pitting thiab crevice corrosion.Qib no ntawm stainless hlau tau tsim thiab tsim rau siv nyob rau hauv halide-muaj ib puag ncig xws li seawater.254SMO kuj tseem muaj kev tiv thaiv zoo rau kev xeb.Tshwj xeeb tshaj yog nyob rau hauv halide-muaj acids, cov hlau yog superior rau zoo tib yam stainless hlau.Nws C muaj<0.03%, yog li nws yog hu ua ntshiab austenitic stainless hlau (<0.01% tseem hu ua super austenitic stainless hlau).Super stainless hlau yog ib hom tshwj xeeb stainless hlau.Ua ntej ntawm tag nrho cov, nws yog txawv los ntawm zoo tib yam stainless hlau nyob rau hauv tshuaj muaj pes tsawg leeg.Nws yog hais txog lub siab alloy stainless hlau uas muaj nickel siab, siab chromium thiab siab molybdenum.Ntawm lawv, tus nto moo tshaj plaws yog 254SMO uas muaj 6% Mo. Cov hlau no muaj qhov zoo heev hauv zos corrosion kuj, thiab muaj pitting corrosion kuj zoo (PI≥40) thiab Nws muaj kev ntxhov siab corrosion kuj zoo dua thiab yog ib qho kev hloov rau Ni- Raws li cov alloys thiab titanium alloys.Thib ob, nyob rau hauv cov nqe lus ntawm kub tsis kam los yog corrosion kuj, nws muaj zoo dua kub tsis kam los yog corrosion kuj, uas yog irreplaceable rau 304 stainless hlau.Tsis tas li ntawd, los ntawm kev faib tawm ntawm cov hlau tsis muaj steel, cov qauv metallographic tshwj xeeb stainless hlau yog cov qauv austenite metallographic ruaj khov.
Txij li qhov tshwj xeeb stainless hlau no yog cov khoom siv high-alloy, cov txheej txheem tsim khoom yog qhov nyuaj heev.Feem ntau, tib neeg tsuas tuaj yeem tso siab rau cov txheej txheem ib txwm ua los tsim cov hlau tsis zoo no tshwj xeeb, xws li infusion, forging, dov thiab lwm yam.
254 SMO Material Application Areas
1. Dej hiav txwv: marine lug nyob rau hauv marine ib puag ncig, seawater desalination, seawater aquaculture, seawater heat exchange, thiab lwm yam.
2. Kev tiv thaiv ib puag ncig: flue gas desulfurization ntaus ntawv rau thermal zog tsim, kev kho dej khib nyiab, thiab lwm yam.
3. Lub zog hluav taws xob: kev tsim hluav taws xob nuclear, kev siv cov thee, kev tsim hluav taws xob dej hiav txwv, thiab lwm yam.
4. Petrochemical teb: roj refining, tshuaj thiab khoom siv tshuaj, thiab lwm yam.
5. Khoom noj khoom haus: ntsev ua, soy sauce brewing, thiab lwm yam.
6. High-concentration chloride ion ib puag ncig: ntawv kev lag luam, ntau yam khoom siv tshuaj dawb
