ASTM A335 P11 Seamless Steel Yeeb Nkab
Lub ntsiab lus tseem ceeb
Standard specification rauseamless ferritic alloy - steel yeeb nkabsiv hauvsiab -kev pabcuam kub. QibP11yog classicchromium{0}}molybdenum alloy hlaudav siv nyob rau hauv fais fab nroj tsuag thiab refineries rau nws zoo siab - kub lub zog thiab oxidation kuj.
Lub npe piav qhia
| Ib feem | Lub ntsiab lus |
|---|---|
| ASTM | ASTM International |
| A335 | Kev qhia tshwj xeeb rau seamless ferritic alloy- steel yeeb nkab rau siab - kev pabcuam kub |
| P11 | Qib qib (1¼% Chromium, ½% Molybdenum alloy) |
| Seamless | Tsis muaj longitudinal weld seam |
Cov yam ntxwv tseem ceeb ntawm Qib P11
| Feature | Kev piav qhia |
|---|---|
| Hom khoom | Chromium-Molybdenum (Cr-Mo) alloy hlau |
| Lub Npe | 1¼Cr-½Mo steel |
| Cov khoom tseem ceeb | Zoocreep zogthiab oxidation tsis kam ntawm siab kub |
| Yam Kev Pabcuam Temp | Mus txog~ 550℃(~ 1025℃F) |
| Kev kho cua sov | Tag Nrho Annealedlos yogNormalized & Tempered |
| Weldability | Ncaj ncees (yuav tsum tau preheat thiab post-weld heat treatment) |
Chemical Composition (Key Elements)
| Element | Cov ntsiab lus (%) |
|---|---|
| Chromium (Cr) | 1.00 - 1.50 |
| Molybdenum (hli) | 0.44 - 0.65 |
| Cov pa roj carbon (C) | 0.05 - 0.15 |
| Manganese (Mn) | 0.30 - 0.60 |
| Silicon (Si) | 0.50 - 1.00 |
Mechanical Properties
| Khoom | Kev xav tau |
|---|---|
| Tensile zog | 415 MPa (60,000 psi) min |
| Yield zog | 205 MPa (30,000 psi) min |
| Elongation | 30% min (ntawm 50mm ntsuas qhov ntev) |
Muab piv: P11 vs. Lwm Qib
| Yam | A335 P11 | A335 P22 | A335 P5 |
|---|---|---|---|
| Hom alloy | 1¼Cr-½ Mo | 2¼Cr-1Mo | 5Cr-½ Mo |
| Chromium % | ~1.25% | ~2.25% | ~5% |
| Molybdenum% | ~0.5% | ~1% | ~0.5% |
| Kev siv tseem ceeb | Cov kav dej, boiler tubes | High -temp headers, superheaters | High sulfur / oxidation kev pab cuam |
| Temp txwv | Nruab nrab -High | Siab dua P11 | Siab oxidation tsis kam |
Cov ntawv thov siv
Fais fab nroj tsuag chav pipingthiab boiler raj
Cov txheej txheem piping(siab-kub kab)
Superheater thiab reheater rajhauv boilers
Kub exchanger tubingrau siab -kev pabcuam kub
Petrochemical kev lag luamkhoom siv
Cov Lus Cim Tseem Ceeb
Matching Cheebtsam:Rau cov kav dej, qhov sib txuam fittings tau teev tseg hauv qabASTM A234 WP11(wrought fittings) thiab flanges / forgings hauv qabASTM A182 F11.
Kev kho cua sov tswj:Kev kho cua sov kom zoo yog qhov tseem ceeb kom ua tiav qhov tsim nyog microstructure (feem ntau yog tempered bainitic qauv) rau kev nkag siab zoo.
Weld txheej txheem:Yuav tsum muaj cov txheej txheem vuam tshwj xeeb suav nrog preheat (~ 200 -} 300℃/ 400-575℃F) thiab kev kho cua sov tom qab vuam (PWHT) ntawm ~ 650-750℃(1200-1380℃F).
Kev Lag Luam Status:Thaum tseem siv, P11 tau hloov pauv ntau heevP22 (2¼Cr-1Mo)rau ntau daim ntawv thov vim P22 qhov zoo dua siab - qhov kub thiab txias. Txawm li cas los xij, P11 tseem yog tus nqi - kev xaiv zoo rau qhov nruab nrab tshwj xeeb - cov kev pabcuam kub kub.
