Tus qauv A335 (ASTM A335/ASME S-A335) yog ib qho kev qhia thoob ntiaj teb rau cov kav hlau ferritic alloy steel seamless uas siv rau hauv qhov kub thiab txias thiab qhov chaw siab. Nws yog siv dav hauv kev lag luam petrochemical, fais fab (thermal/nuclear power), boiler thiab refining. Cov kav hlau nyob rau hauv tus qauv no muaj lub zog kub zoo heev, tiv taus kev nkag thiab tiv taus corrosion, thiab tsim nyog rau cov xwm txheej ua haujlwm hnyav.
Cov ntaub ntawv dav dav thiab cov tshuaj lom neeg sib xyaw ntawm A335 tus qauv
Cov ntaub ntawv A335 tau sib txawv los ntawm cov lej "P", thiab cov qib sib txawv yog qhov tsim nyog rau qhov kub thiab txias sib txawv thiab qhov chaw corrosive:
| Qib | Cov khoom siv tshuaj tseem ceeb | Cov yam ntxwv | Kub siv tau |
| A335 P5 | Cr 4-6%, Mo 0.45-0.65% | Tiv taus cov tshuaj sulfur corrosion thiab creep ntawm qhov kub nruab nrab | ≤650 ° C |
| A335 P9 | Cr 8-10%, Mo 0.9-1.1% | Nws muaj kev tiv thaiv oxidation kub thiab muaj zog heev | ≤650 ° C |
| A335 P11 | Cr 1.0-1.5%, Mo 0.44-0.65% | Zoo weldability thiab nruab nrab-kub zog | ≤550 ° C |
| A335 P12 | Cr 0.8-1.25%, Mo 0.44-0.65% | Zoo ib yam li P11, kev xaiv pheej yig | ≤550 ° C |
| A335 P22 | Cr 2.0-2.5%, Mo 0.9-1.1% | Tiv thaiv kev xeb hydrogen, feem ntau siv rau hauv cov chaw nres tsheb fais fab boilers | ≤600 ° C |
| A335 P91 | Cr 8-9.5%, Mo 0.85-1.05% | Lub zog siab heev, nyiam rau cov chav supercritical | ≤650 ° C |
| A335 P92 | P91 + W | Kev tiv taus kub dua, tsim nyog rau cov chav tsev ultra-supercritical | ≤700 ° C |
Cov xwm txheej ntawm daim ntawv thov ntawm A335 steel pipes
1. Kev lag luam roj av
A335 P5/P9: catalytic cracking units hauv refineries, high-temperature sulfur-muaj pipelines.
A335 P11/P12: cov khoom sib pauv cua sov, cov kav dej xa mus rau qhov kub thiab txias nruab nrab.
2. Kev lag luam fais fab (hluav taws xob thermal/hluav taws xob nuclear)
A335 P22: Cov kav dej loj thiab cov taub hau ntawm cov chaw tsim hluav taws xob thermal ib txwm muaj.
A335 P91/P92: Cov chav Supercritical/ultra-supercritical, cov kav dej fais fab nuclear siab.
3. Cov Boilers thiab cov hlab ntsha siab
A335 P91: Cov khoom kub siab ntawm cov boilers niaj hnub ua haujlwm siab.
A335 P92: Cov kav dej kub uas tiv taus kub rau cov boilers siab dua.
Yuav ua li cas xaiv cov khoom siv A335 kom raug? Qhov kub thiab txias uas yuav tsum tau ua:
Cov kev cai kub:
≤550°C: P11/P12
≤650°C: P5/P9/P22/P91
≤700°C: P92
Ib puag ncig corrosive:
Cov tshuaj uas muaj sulfur → P5/P9
Ib puag ncig hydrogen corrosive → P22/P91
Tus nqi thiab lub zog:
Kev xaiv pheej yig → P11/P12
Cov kev cai muaj zog siab → P91/P92
Cov qauv sib npaug thoob ntiaj teb rau A335 steel pipes
| A335 | (EN) | (JIS) |
| P11 | 13CrMo4-5 | STPA23 |
| P22 | 10CrMo9-10 | STPA24 |
| P91 | X10CrMoVNb9-1 | STPA26 |
Cov Lus Nug Feem Ntau
Q1: Qhov txawv ntawm A335 P91 thiab P22 yog dab tsi?
P91: Cov ntsiab lus chromium thiab molybdenum siab dua, muaj zog tiv taus kev nkag mus, tsim nyog rau cov chav nyob supercritical.
P22: Tus nqi qis dua, tsim nyog rau cov boilers fais fab ib txwm muaj.
Q2: Puas yog A335 steel yeeb nkab xav tau kev kho cua sov?
Yuav tsum tau kho kom zoo + tempering, thiab P91/P92 kuj xav tau kev tswj hwm qhov txias kom nruj.
Q3: A335 P92 puas zoo dua P91?
P92 muaj qhov kub thiab txias dua (≤700 ° C) vim muaj tungsten (W), tab sis tus nqi kuj siab dua.
A335 tus qauv alloy seamless steel yeeb nkab yog cov khoom siv tseem ceeb hauv qhov kub thiab txias thiab siab. Cov ntaub ntawv sib txawv (xws li P5, P9, P11, P22, P91, P92) yog qhov tsim nyog rau ntau qhov xwm txheej. Thaum xaiv, nws yog qhov tsim nyog los xav txog qhov kub thiab txias, corrosion, lub zog thiab cov nqi, thiab xa mus rau cov qauv sib npaug thoob ntiaj teb (xws li EN, JIS).
Lub sijhawm tshaj tawm: Lub Rau Hli-06-2025
