ASTMA302 Qib Dyog manganese-molybdenum-nickel alloy steel phaj tshwj xeeb tsim rau welded boilers thiab cov hlab ntsha siabRaws li ASTM International. Nws muaj lub zog tensile siab, feem ntau nyob rau hauv thaj tsam ntawm 85--90 ksi(590-620 MPa), thiab siv nyob rau hauv siab - kub, siab - kev siv siab.

Chemical Composition thiab Mechanical Property

Cov yam ntxwv tseem ceeb thiab Specifications:

Kev sib xyaw:Muaj nickel, manganese, thiab molybdenum rau kev txhim kho lub zog thiab tawv.

Daim ntawv thov:Feem ntau siv rau kev tsim cov hlab ntsha siab, tshwj xeeb tshaj yog nyob rau hauv cov roj, roj, thiab hluav taws xob tsim kev lag luam.

Mechanical Properties:Nta lub zog tawm ntawm 51--57 ksi (350--390 MPa).

Qhov xwm txheej:Muab raws li kub- dov los yog nrog cov kev kho cua sov tshwj xeeb, feem ntau yuav tsum tau kuaj ultrasonic.

Cov ntawv thov tseem ceeb

Kev lag luam Petrochemical: Siv dav hauv kev tsim cov khoom tseem ceeb xws li reactors, tshav kub exchangers, separators, spherical cia tanks thiab liquefied gas cylinders. Nws yog haum rau siab - kub, siab - siab thiab hydrogen kev pab cuam tej yam kev mob, thiab muaj peev xwm tiv taus corrosive xov xwm nyob rau hauv roj av refining thiab tshuaj synthesis.

Lub Zog Zog Field: Muaj feem xyuam rau cov khoom tseem ceeb xws li boiler nruas, superheaters thiab reheaters ntawm fais fab chaw nres tsheb. Nws kuj tseem tuaj yeem siv rau siab - cov kav dej siab thiab turbine volutes ntawm cov chaw nres tsheb hydropower, ua tau raws li cov kev xav tau ntawm siab - qhov kub thiab txias ntawm chav sib kis thiab cov kabmob siab hauv kev tsim hluav taws xob.

Nuclear Energy Field: Nws tuaj yeem siv rau cov txheej txheem tseem ceeb xws li cov tshuab hluav taws xob nuclear. Nrog zoo heev toughness thiab lub zog, nws ua kom muaj kev nyab xeeb thiab ruaj khov thaum lub sij hawm muaj kev cuam tshuam nuclear.

Lwm yam teb: Siv nyob rau hauv siab-cov khoom siv bearing xws li cov roj av liquefied roj av lub tog raj kheej thiab hydrogenation reactors, hloov mus rau qhov chaw ua haujlwm nyuaj xws li qhov kub thiab txias.

Cov Cai Thov

Txheem thiab cov khoom siv: Yuav tsum ua raws li ASTM A302 / ASME SA-302M tus qauv. Nws yog manganese-molybdenum-nickel alloy steel phaj nrog lub zog tensile ntawm 550-690MPa, lub zog tawm los ntawm Ntau dua lossis sib npaug rau 345MPa, thiab elongation ntawm Ntau dua lossis sib npaug li 20% (gauge ntev 50mm).

Kev khiav hauj lwm qhov kub thiab txias: Qhov ntsuas kub siv tau yog -60℃txog 410 degree, uas tuaj yeem tiv taus qis- qhov kub thiab txias (tsim nyob rau hauv kev ntsuam xyuas cuam tshuam ntawm -20℃/-40℃/-60 degree) thiab nruab nrab-siab kub mechanical loads.

Kev Ua Haujlwm thiab Kev Tshawb Nrhiav Tsis Zoo: Yuav tsum tau kho cua sov xws li normalizing + tempering; steel daim hlau nrog thickness ＞ 25mm xav tau normalizing kev kho mob. Nws yuav tsum dhau A578 tus qauv kuaj pom qhov tsis haum (Qib A / B / C), thiab UT qhov kev kuaj pom qhov tsis zoo thiab thib peb -kev kuaj xyuas tog (xws li SGS) yog xav tau thaum tsim nyog.

Medium Compatibility Cov xwm txheej: Muaj peev xwm tiv taus hydrogen corrosion, siab -kub chav thiab qee yam tshuaj lom neeg, tab sis tsis haum rau kev ua haujlwm muaj zog (xws li cov kua qaub, concentrated alkali) ua haujlwm.

Hu rau tam sim no

Yog tias koj xav paub ntxiv txog GNEE cov khoom, koj tuaj yeem xa email rau beam@gneesteelgroup.com. Peb zoo siab tshaj los pab koj.

A302 Qib D yog dab tsi? Dab tsi yog nws qhov kev faib khoom tseem ceeb?

A302 Qib D yog qib qis- alloy steel phaj feem ntau yog tsim los ntawm cov pa roj carbon thiab manganese, nrog rau cov khoom sib xyaw ua ke. Nws belongs rau ASTM A302 tus qauv, cais raws li lub siab lub nkoj steel, tsim los rau siab -kub thiab siab- kev siv cov kabmob.

Dab tsi yog cov tshuaj tseem ceeb ntawm A302 Qib D?

Nws cov ntsiab lus tshuaj muaj xws li C (0.20-0.28%), Mn (1.20-1.50%), Si (0.15-0.35%), P Tsawg dua lossis sib npaug rau 0.035%, S Tsawg dua lossis sib npaug li 0.035%, thiab cov lej ntawm Ni, Cr, Mo, kom ntseeg tau tias peb muaj peev xwm zoo thiab cov khoom siv zoo.

Qhov tsawg kawg nkaus tensile lub zog ntawm A302 Qib D yog dab tsi?

Qhov tsawg kawg nkaus tensile lub zog ntawm A302 Qib D yog 515 MPa (74,700 psi). Lub zog tensile siab no ua rau nws tiv taus cov khoom hnyav thiab siab siab hauv kev lag luam khoom siv.

Dab tsi yog qhov kev tawm dag zog ntawm A302 Qib D?

Nws lub zog tawm los ntawm 290 MPa (42,000 psi) txog 380 MPa (55,000 psi), nyob ntawm kev kho cua sov thiab phaj tuab. Qhov ntau yam no ua kom zoo heev toughness thiab load-cov kabmob muaj peev xwm.

Cov txheej txheem kho cua sov dab tsi yog A302 Qib D feem ntau raug rau?

Nws yog feem ntau raug rau normalizing thiab tempering (N&T) kev kho cua sov. Normalizing refines nplej, thaum tempering txo brittleness, txhim kho cov hlau ductility thiab cuam tshuam rau kev ua hauj lwm hnyav.

Qhov kev pabcuam siab tshaj plaws ntawm A302 Qib D yog dab tsi?

A302 Qib D tuaj yeem ua haujlwm ruaj ntseg ntawm qhov kev pabcuam siab tshaj plaws ntawm 538℃(1000℃F). Nws tuav cov qauv kev ruaj ntseg thiab cov khoom siv kho tshuab ntawm qhov kub thiab txias, haum rau siab - cov ntawv siv cua sov.

Dab tsi yog cov ntawv thov ntawm A302 Qib D?

Nws yog dav siv hauv cov hlab ntsha siab, boilers, chav kav dej, thiab cov khoom siv petrochemical. Nws qhov siab - kub thiab siab - siab ua haujlwm ua rau nws zoo tagnrho rau kev tuav cov ncu, roj, roj, thiab lwm yam corrosive lossis siab - cov xov xwm kub.

Puas yog A302 Qib D Weldable? Txoj kev vuam dab tsi raug pom zoo?

Yog, nws muaj zoo weldability. Kev pom zoo welding txoj kev muaj xws li shielded hlau arc vuam (SMAW), roj tungsten arc vuam (GTAW), thiab submerged arc vuam (SAW), nrog sib piv qis- alloy steel electrodes.

Dab tsi ua ntej - vuam yuav tsum tau npaj rau A302 Qib D?

Kev npaj ua ntej- vuam muaj xws li ntxuav qhov chaw vuam (tshem cov roj, xeb, thiab oxides), preheating rau 100-150℃kom tsis txhob muaj qhov txias txias, thiab xyuas kom cov phaj saum npoo qhuav thiab tsis muaj kab mob los lav qhov vuam zoo.

Dab tsi ncej-weld heat treatment (PWHT) yog xav tau rau A302 Qib D?

Tom qab-weld kev kho cua sov feem ntau cuam tshuam nrog kev ntxhov siab los ntawm 595-650 degree, tuav rau qee lub sijhawm (raws li tuab), tom qab ntawd txias maj mam. Qhov no txo ​​welding residual kev nyuaj siab thiab txhim kho weld toughness thiab corrosion kuj.