Khoom nta
Zoo heev -kub oxidation thiab corrosion kuj (core kom zoo dua)
Lub ntsiab kom zoo dua ntawm ASTM A335 P9 nyob rau hauv nws zoo heev siab -kub oxidation kuj thiab corrosion kuj. Thanks to the addition of 8-10% chromium (Cr), P9 can form a dense Cr₂O₃ oxide film at high temperatures, effectively resisting high-temperature oxidation and thermal corrosion. Nws lub siab txwv rau oxidation tsis kam mus txog 550-600 degree, uas yog siab dua li ntawm P1 (tsawg dua los yog sib npaug rau 450 degree) thiab P11 (tsawg dua lossis sib npaug li 538 degree), thiab piv rau P5. Nyob rau hauv siab -kub sulfur- muaj ib puag ncig zoo ib yam ntawm refineries, P9 nthuav tawm superior corrosion kuj piv rau qis-chromium qib, zoo tiv taus siab - kub sulfidation corrosion thiab ua ke oxidation{28}}sulfidation corrosion. Tsis tas li ntawd, nws cov ntsiab lus 1% molybdenum, siab dua P5's 0.5% Mo, ntxiv txhim kho nws qhov siab -kub creep resistance. Thaum nws qhov tsawg kawg nkaus tensile lub zog yog 415 MPa thiab qhov tsawg kawg nkaus lub zog yog 205 MPa-tso nws nyob rau hauv par nrog P5-nyob rau hauv cov nqe lus ntawm high-kub oxidation kuj thiab creep kuj, P9 muaj cov zoo sib xws.
Zoo heev -kub muaj zog thiab nkag tau yooj yim
ASTM A335 P9 tswj cov qib zoo ntawm qhov kub thiab txias. Ua tsaug rau qhov sib ntxiv ntawm 1% molybdenum (Mo) (siab dua li 0.5% Mo hauv P5) thiab cov ntsiab lus chromium ntau dua, P9 nthuav tawm qhov siab tshaj -kub creep rupture zog piv rau P5 nyob rau hauv qhov kub ntawm 500-600℃. Nyob rau hauv tej yam kev mob ntawm 550 degree, P9 muaj zoo oxidation tsis kam thiab siab - kub lub zog tshaj P5, ua rau nws haum rau siab - kub thiab siab - siab piping systems ua hauj lwm nyob rau hauv siab kub thiab siab qib. Thaum nws qhov siab - qhov kub thiab txias tuav yog piv rau P5, P9 muaj kev tiv thaiv zoo tshaj plaws, tso cai rau kev ua haujlwm ntev - nyob rau hauv qhov hnyav dua - qhov kub thiab txias ib puag ncig.
Zoo machinability thiab formability
ASTM A335 P9 nthuav tawm cov khoom txias thiab kub ua haujlwm zoo, tso cai rau ntau yam txheej txheem xws li kub dabtsi yog khoov, txias dabtsi yog khoov, thiab forging. Nrog rau cov ntsiab lus me ntsis alloy, nws pom zoo heev formability thaum lub caij txias khoov, ua rau nws haum rau manufacturing yeeb nkab fittings xws li luj tshib, tees, thiab reducers. Nws yuav tsum tau muab sau tseg tias vim nws cov ntsiab lus chromium siab dua (8-10%), P9 muaj ib qho kev nyiam me ntsis rau kev ua hauj lwm hardening piv rau P5. Yog li ntawd, nws raug pom zoo kom suav nrog qhov tsim nyog nruab nrab annealing cov kauj ruam thaum tsim cov txheej txheem. Nws cov machinability yog piv rau cov P5, thiab cov pa machining txoj kev tuaj yeem ua haujlwm rau kev ua haujlwm.
Kev ua tau zoo vuam zoo thiab nruj tom qab- vuam cov cua sov yuav tsum tau ua
ASTM A335 P9 pom zoo weldability. Txawm li cas los xij, vim nws cov ntsiab lus chromium siab dua (8-10%), nws muaj kev nyiam ntau dua rau kev ua kom tawv nqaij hauv tshav kub- thaj tsam cuam tshuam piv rau P5, yog li xav tau cov txheej txheem vuam nruj dua thiab tom qab-weld heat treatment (PWHT). Nws raug nquahu kom preheat ua ntej vuam ntawm 200-300 degree. Tom qab vuam, PWHT yuav tsum tau ua los ntawm cua sov rau 730-780 degree, tuav ntawm qhov kub thiab txias, thiab maj mam txias. Cov txheej txheem no yuav pab tshem tawm cov kev ntxhov siab ntawm cov welding residual, soften lub tshav kub-cuam tshuam cheeb tsam, thiab xyuas kom meej lub toughness thiab tawg tsis kam ntawm welded sib koom.
Lub koom haum muaj kev ruaj ntseg zoo thiab ntev - kev cia siab rau kev pabcuam
ASTM A335 P9 qhia txog kev ruaj ntseg zoo thaum nyob ntev - kev pabcuam ntawm qhov kub thiab txias tsawg dua lossis sib npaug li 600℃. Nws cov ntsiab lus chromium siab dua (8-10%) txhim kho cov khoom siv oxidation tsis kam thiab siab -kub corrosion kuj. Qhov sib ntxiv ntawm 1% Mo ntxiv txhim kho siab -kub creep zog, ua kom lub koom haum muaj kev ruaj ntseg thaum lub sij hawm ntev - qhov kub thiab txias kev pab cuam. Tom qab normalization thiab tempering (N + T) kev kho cua sov, P9 tau txais ib qho zoo thiab zoo ferrite + carbide microstructure, lav lub koom haum kev ruaj ntseg thiab kev ntseeg siab nyob rau hauv high-temperature kev pab cuam.
Technical Specifications
Tshuaj muaj pes tsawg leeg (ASTM A335 / ASME SA335)
|
Lub ntsiab |
Cov kev cai txheem |
Nco tseg |
|
C |
Tsawg dua lossis sib npaug li 0.15% |
Tsawg- carbon tsim kom ntseeg tau tias weldability thiab toughness |
|
Mn |
0.30 - 0.60% |
Kev daws teeb meem ntxiv dag zog, txhim kho lub zog |
|
P |
Tsawg dua lossis sib npaug li 0.025% |
Cov khoom tsis zoo, tswj nruj heev |
|
S |
Tsawg dua lossis sib npaug li 0.025% |
Cov khoom tsis zoo, tswj nruj heev |
|
Si |
0.25 - 1.00% |
Deoxidizer, txhim kho siab -kub oxidation kuj |
|
Cr |
8.00 - 10.00% |
Cov ntsiab lus tseem ceeb uas muab kev zoo siab -kub oxidation thiab corrosion kuj |
|
Mo |
0.90 - 1.10% |
Cov ntsiab lus tseem ceeb los txhim kho siab -kub creep tawg lub zog (cov ntsiab lus siab dua P5) |
|
Fe |
Qhov seem tshuav (≈ 89%) |
Matrix element |
Lub cev muaj zog
|
Kev ua tau zoo |
Tus lej Tus Nqi / Ntau |
Cov xwm txheej kuaj |
|
Qhov ntom |
≈ 7.75 g / cm³ |
Chav ntsuas kub (20 degree) |
|
Melting Point |
≈ 1370-1420 degree |
- |
|
Hluav taws xob tsis kam |
≈ 0.45 μΩ·m |
Chav ntsuas kub |
|
Thermal conductivity |
≈ 32 W/(m·K) |
Chav ntsuas kub |
|
Coefficient ntawm Thermal Expansion (20-100 degree) |
≈ 11.2 × 10⁻⁶ /K |
- |
|
Elastic Modulus (Young's Modulus) |
Qhov siab tshaj plaws ntawm qhov siab ntawm 200 GPa |
Chav ntsuas kub |
|
Poisson tus ratio |
≈ 0.28 |
Chav ntsuas kub |
|
Magnetism |
Ferromagnetic |
Ferrite qauv, uas yog hlau nplaum |
Mechanical Properties (Normalized + Tempered, Tus nqi zoo, ASTM A335)
|
Kev ua tau zoo |
Yam nqi |
Cov qauv kev coj ua |
|
Tensile zog |
Ntau dua lossis sib npaug li 415 MPa |
ASTM A335 Cov Lus Qhia Tshwj Xeeb |
|
Yield zog (0.2% Offset) |
Ntau dua lossis sib npaug li 205 MPa |
ASTM A335 Cov Lus Qhia Tshwj Xeeb |
|
Elongation (gauge ntev 2in / 50mm) |
Ntau dua lossis sib npaug li 30% |
ASTM A335 Cov Lus Qhia Tshwj Xeeb |
|
Hardness |
Tsawg dua lossis sib npaug rau 217 HB (tus nqi raug) |
- |
Lus Cim: Lub zog ntawm P9 yog tib yam li P5 (Ntau dua lossis sib npaug rau 415 MPa). Txawm li cas los xij, nws cov txiaj ntsig tseem ceeb yog nyob rau hauv qhov zoo heev - kub oxidation tsis kam thiab corrosion kuj coj los ntawm 8-10% chromium cov ntsiab lus, nrog rau qhov zoo tshaj plaws creep kuj muab los ntawm 1% Mo, es tsis muaj zog ntxiv. Rau lub zog siab dua lossis qib siab dua, nws raug nquahu kom xaiv P91.
High -kev ua haujlwm kub
ASTM A335 P9 tuav lub zog zoo ntawm qhov kub thiab txias thiab haum rau ntev - lub sij hawm siab - kub qhov kev pab cuam mus txog 600℃:
|
Kub |
Tensile zog (MPa, kwv yees) |
Kev tuav pov hwm tus nqi |
|
Chav tsev kub (20 degree) |
Ntau dua lossis sib npaug rau 415 |
100% |
|
400 degree |
≈ 380 |
Ntau dua lossis sib npaug li 92% |
|
450 degree |
≈ 350 |
Ntau dua lossis sib npaug li 84% |
|
500 degree |
≈ 290 |
Ntau dua lossis sib npaug li 70% |
Ntev -Lub sij hawm Thermal Stability thiab Microstructural Stability:
ASTM A335 P9 pom zoo microstructural stability thaum lub sij hawm ntev - kev pab cuam ntawm qhov kub thiab txias tsawg dua los yog sib npaug rau 600℃. Qhov sib ntxiv ntawm 8-10% Cr muaj txiaj ntsig zoo txhim kho siab -kub oxidation tsis kam thiab thermal corrosion kuj, thaum suav nrog 1% Mo ntxiv txhim kho lub zog nkag. Txawm li cas los xij, microstructural stability txo thiab oxidation tsis kam yog txo thaum siv rau ncua sij hawm siab tshaj 620 degree; yog li, nws tsis pom zoo rau kev pabcuam mus sij hawm ntev tshaj qhov ntsuas kub no. Rau qib siab dua, P91 lossis P92 raug qhia.
Kev kho cua sov
Qhov kev ua tau zoo kawg ntawm ASTM A335 P9 yog nyob ntawm kev kho cua sov, nrog rau cov lus qhia tshwj xeeb hauv qab no:
1. Kev Kho Mob (Normalizing)
Kub rau 925-955 degree, tuav lub sijhawm txaus (kwv yees li 1 teev ib nti ntawm phab ntsa tuab), ces cua txias. Qhov no ua rau muaj qhov sib xws, nplua-grained ferrite + carbide microstructure, npaj rau tom ntej tempering.
2. Tempering kho(Tempering)
Kub rau730-780degree, tuav lub sijhawm txaus, ces cua txias. Qhov no tshem tawm cov kev ntxhov siab vim los ntawm normalizing, optimizes toughness thiab plasticity, thiab ua tiav cov kev pabcuam zaum kawg.
3. Tag Nrho Txhuas Txhuas Txhuas Txhuas Txhuas Txhuas Txhuas Txhuas Txhuas Txhuas Txhuas Txhuas Txhuas Txhuas Txhuas Txhuas
Tshav kub rau 840-870 degree, tuav ntawm qhov kub thiab txias, tom qab ntawd lub qhov cub txias kom txog li 650 degree, tom qab ntawd cua txias rau chav sov. Qhov no yog siv los tshem tawm cov kev ntxhov siab ua haujlwm txias lossis txhim kho kev ua haujlwm txias.
Ceeb Toom: Post-weld heat treatment (PWHT) yuav tsum tau ua tom qab vuam. Nws suav nrog cua sov mus rau 730-780 degree, tuav ntawm qhov kub thiab txias, thiab tom qab ntawd maj mam txias kom tshem tawm cov kev ntxhov siab ntawm qhov seem thiab ua rau thaj chaw muaj kev kub ntxhov.
Vim nws cov ntsiab lus chromium siab dua (8-10%), P9 muaj qhov xav tau ntau dua los ua kom tawv tawv hauv thaj tsam weld kub cuam tshuam piv rau P5. Nws raug nquahu kom tswj xyuas cov khoom siv hluav taws xob thiab cov cua sov ua ntej (200-300 degree).
Kev kho cua sov kub thiab lub sij hawm yuav tsum tau tswj nruj me ntsis kom tsis txhob muaj cov nplej coarsening lossis kev ua haujlwm hloov pauv.
Siv tau Media
Siab - qhov kub thiab txias:
Cov kav dej tseem ceeb ntawm cov nroj tsuag fais fab (tsawg dua lossis sib npaug li 600 degree), boiler superheater hlab, reheater hlab
Petroleum refining media:
High -kub sulfur- muaj cov txheej txheem kav dej rau atmospheric thiab nqus distillation, catalytic cracking, hydrotreating, ncua coking, thiab lwm yam.
High -kub sulfur- muaj cov xov xwm:
High -kub sulfur- muaj roj thiab roj media, acidic media ib puag ncig hauv refineries
High -kub txheej txheem gases:
Siab - kub thiab siab - cov kav xa dej ntawm cov chaw siv tshuaj ammonia synthesis, methanol ntau lawm, thiab lwm yam.
High -kub kub hloov khoom nruab nrab:
Thaum tshav kub kub hloov roj pipelines, siab -kub hloov hluav taws xob
Lus Cim: ASTM A335 P9 tsis haum rau cov xov xwm corrosive xws li oxidizing acids (xws li, concentrated nitric acid) thiab siab - kub, siab -concentration chlorides. Nws lub siab oxidation kub txwv yog kwv yees li 600 degree; P91 lossis P92 raug pom zoo saum toj no qhov kub thiab txias. Nyob rau hauv siab -kub, siab -siab hydrogen{13}} muaj ib puag ncig (xws li, hydroprocessing units), kev pheej hmoo ntawm hydrogen corrosion yuav tsum raug soj ntsuam.
ASTM A335 P9 yog haum rau siab -kub (500-600 degree) kev pab cuam uas muaj leej faj-corrosive media. Nws yog ib qho tseem ceeb xaiv cov ntaub ntawv rau high-kub txheej txheem piping nyob rau hauv cov roj refining thiab petrochemical industries, pom zoo rau siv nyob rau hauv cov nram no:
Daim ntawv thov teb
-
Petroleum Refining (Core Application)
● High-cov kav dej kub txheej txheem rau catalytic cracking units
● High- kub thiab siab - cov kav dej siab rau hydrotreating/hydrocracking units
● High-kub pipelines ntawm atmospheric thiab nqus distillation chav tsev
● Ncua sijhawm Coking Unit Txheej Txheej Piping
● Refinery rhaub tubing, cua sov exchanger raj -
Petrochemical Engineering (Core Applications)
● High-cov kav dej kub hauv ethylene cracking units
● Aromatic chav tsev siab -kub txheej txheem kav
● Petrochemical cua sov rauv tube system -
Fossil fuel power generation
● Main Steam Piping rau Subcritical / Supercritical Fais Fab (tsawg dua lossis sib npaug li 600 degree)
● Superheater raj, reheater raj
● High -kub qhov cua qhov kav dej -
Siab - kub thiab siab - cov yeeb nkab fittings
● High-lub luj tshib, tees, thiab reducers
● Forged yeeb nkab fittings, flanges
Kev xa khoom thiab Customization
Peb muab cov kev daws teeb meem hloov tau yooj yim thiab txhim khu kev qha kom ntseeg tau tias koj tau txais ASTM A335 P9 alloy steel kav uas zoo kawg nkaus phim koj qhov kev xav tau.
Customizable cov ntaub ntawv
Peb txhawb tsim ntau yam yooj yim thiab tshwj xeeb cov duab raws li drawings los yog specifications.
|
Daim ntawv |
 Seamless Steel Yeeb Nkab
|
 Loj -inch Thick{1}}walled Yeeb Nkab
|
 Alloy Steel Yeeb Nkab
|
|---|---|---|---|
|
Pauv ntau yam |
Sab nraud txoj kab uas hla: 10.3 - 1067 hli; Phab ntsa Thickness: 1 - 150 hli |
Sab nraud txoj kab uas hla: 219 - 1067 hli; Phab ntsa Thickness: 20 - 150 hli |
Sab nraud txoj kab uas hla: 10.3 - 610 hli; Phab ntsa Thickness: 1 - 50 hli |
|
Customization Muaj peev xwm |
Kub- dov / txias- kos seamless raj, tsau -ntev txiav, bevel machining, yeeb nkab kawg threads, tshwj xeeb kub kho tej yam kev mob (normalizing + tempering / annealing) |
Kub nthuav dav, ruaj -ntev txiav, bevel machining, tshwj xeeb kub kho tej yam kev mob |
Txias- kos cov raj precision, ruaj -ntev txiav, tshwj xeeb nto kho |
Vim li cas thiaj xaiv peb? - Txhim khu kev qha Engineering Technology. Dependable xa khoom.
Peb tsis yog ib tus neeg muag khoom xwb, tab sis yog ib tus neeg koom tes nrog cov ntaub ntawv ntseeg siab rau koj hauv Suav teb.
Vertically Integrated Production
Muaj 20,000㎡ qhov chaw nrog 10+ automated kab (8, 000+ tons / xyoo). Hauv - tsev cuab yeej & qhov chaw tuag ua rau muaj kev hloov kho sai thiab tswj tus nqi zoo - tsis muaj tus neeg nruab nrab kos npe.
Kev Tswjhwm nruj nruj ntawm txhua theem
Tag nrho traceability nyob rau hauv lub tseem ceeb QC checkpoints thoob plaws hauv ntau lawm . 100% raws li ASTM/ASME, EN, thiab GB qauv. Cov ntaub ntawv xeem cov ntaub ntawv muaj nyob nrog txhua qhov khoom xa tuaj.
Txhim khu kev xa khoom & Export ntim
10+ xyoo xa tawm mus rau Tebchaws Europe, North America, Southeast Asia & Middle East nrog cov dej tsis zoo thiab tiv thaiv- xeb, ua ke nrog cov kev xaiv thauj khoom yooj yim kom muaj kev nyab xeeb thiab nyob rau - lub sijhawm tuaj txog.
Qauv validation ua ntej pawg ntau lawm
Peb muab cov qauv dawb rau kev kuaj xyuas zoo, tso cai rau koj tso cov xaj xaj tsuas yog tom qab kev pom zoo. Peb xyuas kom meej qhov sib xws los ntawm cov qauv mus rau cov khoom loj los ntawm qhov ntsuas qhov tseeb thiab kev tsim pob tshab.
FAQ
Q: Dab tsi yog qhov zoo ntawm ASTM A335 P9?
Q: Qhov txawv ntawm ASTM A335 P9 thiab P5 yog dab tsi? Yuav ua li cas xaiv ntawm lawv?
Q: Qhov txawv ntawm ASTM A335 P9 thiab P11 yog dab tsi? Yuav ua li cas xaiv ntawm lawv?
Q: Qhov kev pabcuam siab tshaj plaws rau ASTM A335 P9 yog dab tsi?
Q: Qhov kev ua tau zoo ntawm ASTM A335 P9 yog dab tsi?
Q: Dab tsi yog qhov corrosion kuj ntawm ASTM A335 P9?
Cim npe nrov: Tuam Tshoj astm a335 p9 manufacturers, lwm tus neeg, Hoobkas
