Tus qauv A335 (ASTM A335 / ASME S-A335 Cov Lus Qhia) yog ib qho kev qhia thoob ntiaj teb rau ferritic alloy steel seamless steel kav siv nyob rau hauv qhov kub thiab txias ib puag ncig. Nws yog dav siv hauv petrochemical, fais fab (thermal / nuclear fais fab), boiler thiab refining industries. Cov yeeb nkab steel nyob rau hauv tus qauv no muaj qhov kub thiab txias zog, nkag siab thiab corrosion kuj, thiab haum rau huab cua ua haujlwm.
Cov khoom siv thiab tshuaj muaj pes tsawg leeg ntawm A335 tus qauv
A335 cov ntaub ntawv raug cais los ntawm tus lej "P", thiab cov qib sib txawv yog tsim rau qhov sib txawv ntawm qhov kub thiab txias ib puag ncig:
| Qib | Lub ntsiab chemical Cheebtsam | Yam ntxwv | Siv tau qhov kub thiab txias |
| A335 P5 | Cr 4-6%, Mo 0.45-0.65% | Resistant sulfur corrosion thiab creep ntawm nruab nrab kub | ≤650 ° C |
| A335 P9 | Cr 8-10%, Mo 0.9-1.1% | Nws muaj qhov kub thiab txias oxidation tsis kam thiab kuj muaj zog | ≤650 ° C |
| A335 P11 | Cr 1.0-1.5%, Mo 0.44-0.65% | Zoo weldability thiab nruab nrab-kub lub zog | ≤ 550 ° C |
| A335 P12 | Cr 0.8-1.25%, Mo 0.44-0.65% | Zoo ib yam li P11, kev xaiv nyiaj txiag | ≤ 550 ° C |
| A335 P22 | Cr 2.0-2.5%, Mo 0.9-1.1% | Anti-hydrogen corrosion, feem ntau siv nyob rau hauv chaw nres tsheb fais fab boilers | ≤600 ° C |
| A335 P91 | Cr 8-9.5%, Mo 0.85-1.05% | Ultra-siab zog, nyiam rau supercritical units | ≤650 ° C |
| A335 P92 | P91 + W | Kev kub siab ua haujlwm, haum rau ultra-supercritical units | ≤700 ° C |
Daim ntawv thov scenarios ntawm A335 steel kav
1. Petrochemical kev lag luam
A335 P5 / P9: catalytic cracking units nyob rau hauv refineries, high-temperature sulfur-muaj pipelines.
A335 P11 / P12: kub exchangers, nruab nrab-kub chav xa mus kav.
2. Fais fab kev lag luam (thermal zog/nuclear zog)
A335 P22: Cov kav dej loj thiab cov taub hau ntawm cov nroj tsuag thermal fais fab.
A335 P91/P92: Supercritical/ultra-supercritical units, nuclear fais fab nroj tsuag high-pressure pipelines.
3. Boilers thiab cov hlab ntsha siab
A335 P91: Kub-kub Cheebtsam ntawm niaj hnub high-efficiency boilers.
A335 P92: High-temperature resistant pipelines rau siab dua-parameter boilers.
Yuav xaiv cov khoom siv A335 li cas? Qhov kub thiab txias:
Qhov kub thiab txias:
≤550 ° C: P11 / P12
≤650 ° C: P5 / P9 / P22 / P91
≤700 ° C: P92
Corrosive ib puag ncig:
Sulfur-muaj nruab nrab → P5 / P9
Hydrogen corrosive ib puag ncig → P22 / P91
Nqi thiab lub zog:
Kev xaiv nyiaj txiag → P11/P12
Cov kev xav tau siab zog → P91 / P92
International sib npaug cov qauv rau A335 steel kav
| A335 | (EN) | (JIS) |
| P11 | 13CrMo4-5 | TIAB SA 23 |
| P22 | 10CrMo9-10 | STPA 24 |
| P91 | X10CrMoVNb9-1 | TIAB SA 26 |
FAQ
Q1: Qhov txawv ntawm A335 P91 thiab P22 yog dab tsi?
P91: siab dua chromium thiab molybdenum cov ntsiab lus, muaj zog creep kuj, haum rau supercritical units.
P22: Tus nqi qis dua, haum rau cov tsoos fais fab nroj tsuag boilers.
Q2: Puas yog A335 steel yeeb nkab xav tau kev kho cua sov?
Normalizing + tempering kev kho mob yuav tsum tau, thiab P91 / P92 kuj yuav tsum tau nruj tswj tus nqi cua txias.
Q3: Puas yog A335 P92 zoo dua P91?
P92 muaj qhov kub thiab txias tsis kam (≤700 ° C) vim muaj tungsten (W), tab sis tus nqi kuj siab dua.
A335 tus qauv alloy seamless steel yeeb nkab yog cov khoom tseem ceeb nyob rau hauv qhov kub thiab txias siab. Cov khoom sib txawv (xws li P5, P9, P11, P22, P91, P92) yog haum rau cov xwm txheej sib txawv. Thaum xaiv, nws yuav tsum ua tib zoo xav txog qhov kub thiab txias, corrosiveness, lub zog thiab tus nqi, thiab xa mus rau cov qauv sib npaug thoob ntiaj teb (xws li EN, JIS).
Post lub sij hawm: Jun-06-2025
