ASTM A387 Qib 22 Chav Kawm 1yog ib hom chromium-molybdenum (Cr-Mo) alloy steel phaj tsim rau welded boilers thiab siab -kub siab cov hlab ntsha, muab zoo siab - kub lub zog thiab corrosion kuj, nrog "Class 1" qhia tus qauv tensile lub zog theem thiab haum rau daim ntaub ntawv uas qis dua - qhov kub thiab txias, tsis zoo li qhov kub thiab txias. Nws muaj kwv yees li 2.25% chromium thiab 1.00% molybdenum, ua rau nws zoo tagnrho rau petrochemical, roj & roj, thiab hluav taws xob tsim kev lag luam.
Txheem Specification Rau ASTM A387 Gr.22 Chav Kawm 1 Alloy Steel Phaj
Kev qhia tshwj xeeb: ASTM A387 / ASME SA387
Txuj: ASTM, ASME thiab API
Thickness: 5mm-150mm
Tshwj xeeb: Sheet Sheet, Perforated Sheet, BQ Profile.
Daim ntawv: Coils, Foils, Rolls, Plain Sheet, Shim Sheet, Perforated Sheet, Checkered Phaj, Strip, Flats, Blank (Vaj Huam Sib Luag), Nplhaib (Flange)
Tiav: Kub dov phaj (HR), Cold Rolled Sheet (CR), 2B, 2D, BA NO (8), SATIN (Met with Plastic Coated)
Hardness: Mos, Hard, Ib nrab Hard, Quarter Hard, Spring Hard thiab lwm yam.
Qib sib npaug Alloy Steel ASTM A387 Qib 22 Chav Kawm 1 Phaj
| QIB | UNS NO | DIN | BS | EN |
| Gr 22 Chav Kawm 1 | - | 10 ZPO 910 | 622-515B | 10 ZPO 910 |
Tshuaj muaj pes tsawg leeg ntawm ASTM A387 Gr.22 Chav Kawm 1 Alloy Steel Phaj
| Qib | C | Mn | P | S | Si | Cr | Mo |
| gr 22 | 0.04 - 0.15 | 0.25 - 0.66 | 0.035 | 0.035 | 0.035 | 0.5 max | 0.85 - 1.15 |
Mechanical Properties of Alloy Steel Qib 22 Chav Kawm 1 Phaj
| Tensile zog (ksi) | Tensile zog (MPa) | Yield zog (ksi) | Yield zog (MPa) | Elongation hauv 50mm (%) | Elongation hauv 50mm (%) |
| 60-85 | 415-585 | 30 | 205 | 18 | 45 |
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1. Kev kho cua sov (Thermal processing)
Raws li ASTM A387, tag nrho cov phaj yuav tsum tau kho thermally siv ib qho ntawm cov hauv qab no:
Annealing: Tag nrho softening rau siab tshaj plaws ductility.
Normalizing thiab Tempering (N + T): Kev xa khoom ntau tshaj plaws kom ua tiav qhov sib npaug ntawm lub zog thiab tawv.
Accelerated Cooling (Quenching thiab Tempering - Q+T): Tso cai nrog tus neeg yuav khoom pom zoo; Cov kua quenching los yog cua blasting los ntawm austenitizing kub ua raws li tempering.
Tempering Kub: Rau Qib 22, qhov ntsuas kub tsawg kawg nkaus yuav tsum yog 1250℃F (675 degree).
2. Fabrication thiab Vuam
Lub siab chromium thiab molybdenum cov ntsiab lus yuav tsum tau tswj nruj thaum lub sij hawm fabrication los tiv thaiv kev tawg thiab ua kom muaj kev ncaj ncees.
Preheating: Qhov tseem ceeb ua ntej vuam, feem ntau pom zoo ntawm ntau tshaj 150℃los tiv thaiv hydrogen -induced cracking.
Tom qab-Kev Kho Hniav Kub Kub (PWHT): Qhov tseem ceeb rau kev txo qis kev ntxhov siab thiab txhim kho toughness. Cov txheej txheem txheej txheem suav nrog kev ua kom txias qeeb tom qab khaws cov welded feem ntawm 300-350℃rau 10 feeb lossis ntau dua, feem ntau ua raws li PWHT tag nrho ib tus lej.
Cov txheej txheem vuam: Feem ntau siv txoj hauv kev suav nrog GTAW (Gas Tungsten Arc Vuam), SMAW (Shielded Hlau Arc Vuam), thiab SAW (Submerged Arc Vuam).
Simulated PWHT (SPWHT): Cov neeg muab khoom siv tuaj yeem ua qhov thib peb - tog simulated kev kho cua sov kom ntseeg tau tias cov khoom tuav nws cov khoom siv kho tshuab tom qab qhov tseeb fabrication heat cycles.
3. Mechanical Requirements (Class 1)
Chav Kawm 1 qhia txog lub zog tensile tshwj xeeb, uas yog qis dua Chav Kawm 2:
Tensile zog: 60 txog 85 ksi [415 txog 585 MPa].
Yield zog (min): 30 ksi [205 MPa].
Elongation (min hauv 2 nti): 18%.
Cov ntawv thov tseem ceeb
Boilers & Kub Exchangers:
Nws tsis kam mus scaling, deformation, thiab kub kub ua rau nws zoo tagnrho rau kev hloov cov cua sov hauv boilers, superheaters, thiab cua sov rov qab systems. Cov khoom siv tswj kev ruaj ntseg nyob rau hauv lub caij nyoog thermal cycling, kom ntseeg tau tias kev ua tau zoo thiab txo cov kev xav tau ntawm kev siv fais fab thiab kev siv boiler.
Roj & Roj Kev Lag Luam:
Siv nyob rau hauv cov khoom siv rau cov roj refineries, natural gas processing, thiab petrochemical nroj tsuag, xws li reactors, separators, thiab siab hlab ntsha. Nws muaj peev xwm tiv taus hydrogen nres thiab siab - qhov kub thiab txias kev pab cuam ua rau nws haum rau tuav hydrocarbons thiab cov txheej txheem kua hauv kev xav tau refinery thiab roj ua ib puag ncig.
Kev tsim hluav taws xob:
Cheebtsam rau cov nroj tsuag fais fab uas xav tau siab - qhov kub thiab txias tsis kam, xws li boiler headers, chav kav dej, thiab qhov chaw siab. Cov hlau tsis muaj zog ua kom lub neej ua haujlwm ntev txawm tias nyob rau hauv qhov kev ua haujlwm siab - siab thiab siab - qhov kub thiab txias ntawm cov khoom siv hluav taws xob thermal.
Kev Siv Tshuaj:
Cov khoom siv hauv cov nroj tsuag tshuaj uas muaj qhov kub thiab txias thiab qhov chaw corrosive, suav nrog hydrogenation reactors thiab cov txheej txheem cov hlab ntsha. Nws ua ke ntawm cov tawv tawv, weldability, thiab tsis kam mus rau siab - qhov kub thiab txias degradation ua rau nws yog ib qho kev xaiv zoo rau kev tuav cov kwj tshuaj lom neeg thiab ua kom muaj kev nyab xeeb ntawm kev ua haujlwm.
Vim li cas thiaj xaiv peb:
Koj tuaj yeem tau txais cov khoom zoo meej raws li qhov koj xav tau ntawm tus nqi tsawg kawg nkaus.
Peb kuj muab Reworks, FOB, CFR, CIF, thiab qhov rooj rau qhov rooj tus nqi xa khoom. Peb xav kom koj ua deal rau shipping uas yuav zoo heev.
Cov ntaub ntawv uas peb muab yog muaj tseeb tiag, txoj cai los ntawm raw cov ntaub ntawv xeem daim ntawv pov thawj mus rau qhov kawg dimensional nqe lus.
Peb lav muab cov lus teb tsis pub dhau 24 teev (feem ntau hauv tib lub sijhawm)
Koj tuaj yeem tau txais cov khoom hloov pauv, zeb xa khoom nrog txo lub sijhawm tsim khoom.
Peb tau mob siab rau peb cov neeg siv khoom. Yog tias nws yuav tsis tuaj yeem ua tau raws li koj cov kev xav tau tom qab kuaj xyuas tag nrho cov kev xaiv, peb yuav tsis ntxias koj los ntawm kev cog lus tsis tseeb uas yuav tsim kev sib raug zoo rau cov neeg siv khoom.
Yog xav paub ntxiv txog GNEE cov khoom siv hlau, tiv tauj peb ntawm beam@gneesteelgroup.com. Peb tos ntsoov yuav ua haujlwm nrog koj.
Puas yog A387 Qib 22 Chav Kawm 1 weldable?
Yog lawm, nws yog weldable ntawm ntau txoj kev xws li SMAW, GTAW, thiab GMAW. Preheating (150{2}}260 degree) thiab kev kho cua sov tom qab vuam (PWHT) yog qhov tsim nyog los tiv thaiv qhov txias txias thiab txo qhov kev ntxhov siab.
Dab tsi yog qhov corrosion kuj ntawm A387 Qib 22 Chav Kawm 1?
Nws tiv taus oxidation thiab sulfidation hauv siab - qhov kub thiab txias. Txawm li cas los xij, nws tsis haum rau muaj zog acidic lossis chloride - muaj cov xov xwm, vim nws tsis muaj kev tiv thaiv corrosion txaus nyob rau hauv cov xwm txheej zoo li no.
Dab tsi yog kev lag luam feem ntau siv A387 Qib 22 Chav Kawm 1?
Nws yog dav siv nyob rau hauv petrochemical, refinery, lub zog tsim hluav taws xob (boilers, turbines), thiab tshuaj ua lag luam, feem ntau rau cov hlab ntsha siab, kub exchangers, thiab piping systems.
Dab tsi yog qhov ductility ntawm A387 Qib 22 Chav Kawm 1?
Nws muaj qhov zoo ductility nrog qhov tsawg kawg nkaus elongation ntawm 22% hauv 50mm. Cov cuab yeej no tso cai rau nws tiv taus me ntsis deformation yam tsis muaj kev tawg, ua kom muaj kev ruaj ntseg hauv siab - cov ntawv thov kev coj tus kheej.
A387 Qib 22 Chav Kawm 1 puas tuaj yeem txias- tsim?
Nws tuaj yeem ua tau txias - tsim nrog ceev faj, tab sis preheating yog pom zoo rau cov phaj tuab kom tsis txhob tawg. Tom qab- kev kho cua sov yog xav tau los kho cov khoom siv kho tshuab thiab tshem tawm cov kev ntxhov siab uas seem.
A387 Qib 22 Chav Kawm 1 ua li cas vs. A480 430 stainless hlau?
430 yog ferritic stainless hlau nrog 17% Cr, zoo corrosion kuj tab sis tsis muaj zog creep. Qib 22 yog tsim los rau siab -kub siab cov hlab ntsha, thaum 430 yog rau cov hniav zoo nkauj los yog me me corrosive qhov chaw.
Sib piv A387 Qib 22 Chav Kawm 1 nrog A1018 carbon steel.
A1018 yog qis- carbon steel rau kev siv dav dav, tsis muaj siab -kub tsis kam. Qib 22's Cr-Mo muaj pes tsawg leeg muab kev nkag siab zoo dua thiab oxidation tsis kam, ua rau nws haum rau siab - kub siab daim ntawv thov.
Dab tsi yog qhov coefficient ntawm thermal expansion ntawm A387 Qib 22 Chav Kawm 1?
Nws muaj linear thermal expansion coefficient ntawm 11.7 × 10⁻⁶ /℃(20-100 degree). Qhov no xav tau kev txiav txim siab hauv kev tsim qauv kom tsis txhob muaj kev ntxhov siab thermal tshwm sim los ntawm kev hloov pauv kub.
Dab tsi yuav tsum tau zam hauv A387 Qib 22 Chav Kawm 1 ntau lawm?
Tseem ceeb tsis xws luag kom tsis txhob muaj xws li porosity, inclusions, thiab intergranular cracking. Kev tswj nruj ntawm cov txheej txheem smelting thiab kev kho cua sov ua kom cov khoom ua tau raws li cov txheej txheem siab ntawm cov hlab ntsha.
Qhov txawv ntawm A387 Qib 22 Chav Kawm 1 thiab Chav Kawm 2 yog dab tsi?
Chav Kawm 1 yuav tsum normalizing + tempering, thaum Chav Kawm 2 tso cai quenching + tempering. Chav Kawm 2 muaj zog dua tab sis zoo sib xws toughness. Chav Kawm 1 feem ntau yog siv rau cov dav dav siab -kub siab siab hlab ntsha.