Dab tsi yog 335 P9 khoom
Feb 06, 2026
A335 P9yog seamless ferritic chromium-molybdenum alloy steel yeeb nkab ua raws li Asmeskas tus qauv ASME / ASTM A335, tshwj xeeb yog tsim los rau lub sijhawm ntev- kev pabcuam hauv qab kub thiab kub siab ntawm 550-650℃. Nws cov txiaj ntsig tseem ceeb stems los ntawm nws qhov tseeb alloy piv; Los ntawm cov nyhuv synergistic ntawm chromium thiab molybdenum, ib tug ntom oxide zaj duab xis yog tsim, pab txhawb oxidation kuj thiab corrosion kuj. Nws kuj muaj qhov zoo heev creep kuj thiab txhua yam muaj zog, zoo tiv thaiv yas deformation thiab kev pab cuam lub neej degradation nyob rau hauv high-temperature stress.
Piv nrog rau cov pa roj carbon zoo tib yam, cov kav dej A335 P9 seamless steel kav qhia tau zoo dua cov cim tseem ceeb xws li siab - qhov kub thiab txias tsis kam, ua rau lawv yog ib qho ntawm cov khoom siv yeeb nkab uas nyiam nyob hauv siab - siab boilers, petrochemicals, thiab lwm yam siab - kawg daim ntawv thov.
GNEE Group yog cov chaw tsim khoom hauv cov yeeb nkab steel hauv Suav teb, muab cov yeeb nkab kev sib tham thiab kev ua haujlwm.Seamless steel kav xa khoom thoob ntiaj teb, 10-xyoo lav - tau txais cov qauv dawb tam sim no!
ASTM A335 P9 alloy steel yeeb nkab alloy steel yeeb nkab tshuaj Chemical Compositions (%)
| Cov khoom xyaw | Cov ntaub ntawv |
|---|---|
| UNS Designa-tion | K41545 |
| Cov pa roj carbon (max.) | 0.15 |
| Manganese | 0.30-0.60 |
| Phosphorus (max.) | 0.025 |
| Silicon (max.) | 0.50 |
| Chromium | 4.00-6.00 |
| Molybdenum | 0.45-0.65 |
| Lwm Yam Khoom | … |
Mechanical zog rau ASTM A335 P9 alloy steel yeeb nkab
| Cov khoom | Cov ntaub ntawv |
|---|---|
| Tensile zog, min, (MPa) | 415mpa ua |
| Yield zog, min, (MPa) | 205 Mpa ua |
| Elongation, min, (%), L / T | 30/20 |
Cov ntsiab lus tseem ceeb ntawm A335 P9 Boiler Tube Ntau Lawm Txheej Txheem
1. Smelting Stage: Ib txoj kev ua kom zoo dual- siv lub tshuab hluav taws xob arc rauv (LF), nrog kev tswj nruj dua phosphorus thiab sulfur cov ntsiab lus (ob qho tib si tsawg dua lossis sib npaug li 0.025%). Cov ntaub ntawv ntau lawm los ntawm cov nroj tsuag steel loj qhia tau hais tias VD lub tshuab nqus tsev degassing tuaj yeem tswj cov ntsiab lus hydrogen hauv qab 1.5ppm, txo qhov kev pheej hmoo ntawm cov pob dawb.
2. Piercing Forming: Ib qho Mannesmann skew dov zeb yog siv, nrog cua kub tswj ntawm 1200 ± 20 degree. Hauv kev ua haujlwm tiag tiag, cov dej txias ntws ntawm qhov tho qhov mandrel yuav tsum tau khaws cia ntawm Ntau dua lossis sib npaug li 50m² / h kom tsis txhob muaj qhov tawg sab hauv.
3. Cov Txheej Txheem Txias Txias: Cov duab kos txias feem ntau yog siv rau cov raj uas muaj txoj kab uas hla ntawm 38mm los yog tsawg dua, nrog rau deformation ib qho kev tswj ntawm 15-25%. Ib lub tuam txhab txo qis ovality yuam kev ntawm lub raj tiav los ntawm 40% los ntawm optimizing lub kaum sab xis tuag (los ntawm 12℃mus rau 9 degree).
4. Kev Tiv Thaiv Kev Kub Kub: Lub normalizing kub yuav tsum ncav cuag 950-980 degree, nrog tuav lub sij hawm xam ntawm 2 feeb ib millimeter ntawm phab ntsa thickness. Cov txheej txheem tempering siv cov txheej txheem cua sov, tuav ntawm 650℃rau 2 xuab moos tom qab txias txias kom tshem tawm cov kev ntxhov siab zoo.
Cov ntawv thov tseem ceeb thiab cov ntaub ntawv tshawb fawb ntawm P9 Siab-Pressure Alloy Seamless Steel Pipes
1. Kev lag luam fais fab
Supercritical Generator Units: P9 yog siv nyob rau hauv boiler superheater raj, reheaters, thiab lub ntsiab chav kav, withstanding siab kub ntawm 550-650℃thiab siab tshaj 16MPa. Piv txwv li, 500MW supercritical fais fab nroj tsuag siv P9 steel kav tuav ruaj khov tom qab 100,000 teev ua haujlwm.
Cov Khoom Siv Hluav Taws Xob Hluav Taws Xob: P9 yog siv rau hauv lub tshuab hluav taws xob nuclear reactor auxiliary piping systems kom muaj kev nyab xeeb ntawm kev thauj mus los ntawm siab -kub cua txias tshaj tawm thiab muab hluav taws xob zoo heev.
2. Kev lag luam Petrochemical
Refining Unit Heating Furnace Tubes: Lub raj xa dej ntawm hydrogenation reactor nyob rau hauv ib txoj haujlwm petrochemical siv cov khoom siv P9, ua tiav lub neej kev pab ntau tshaj 8 xyoo nyob rau hauv qhov kub ntawm 600℃thiab hydrogen sulfide corrosion, ntau dua peb zaug ntev dua li cov pa roj carbon zoo tib yam.
Siab - chav tsev hydrogenation siab: P9 steel kav tuaj yeem tiv taus siab tshaj 10MPa thiab siv los thauj cov khoom siv hluav taws xob thiab tawg, nrog kev nyab xeeb zoo dua rau cov khoom siv ib txwm muaj.
A335 P9 Boiler raj Hoobkas
