1.4948 Stainless hlau yog dab tsi?

1.4948 stainless hlau, feem ntau hu ua 304H lossis UNS S30409, yog siab - carbon variant ntawm tus qauv 304 austenitic stainless hlau. Qhov kev xaiv "H" qhia tias nws tsim nyog rau kev ua haujlwm siab - qhov kub thiab txias, qhov twg cov pa roj carbon ntau ntxiv muab kev txhim kho kev nkag siab thiab kev ntxhov siab rupture resistance. Nws yog dav siv nyob rau hauv lub siab hlab ntsha, boilers, superheaters, thiab lwm yam Cheebtsam ua hauj lwm nyob rau hauv siab kub nyob rau hauv lub hwj chim tiam thiab petrochemical industries.

 

Qhov siab - kub austenitic qib no yog tus qauv raws li cov txheej txheem thoob ntiaj teb tseem ceeb.

Txuj	Qib sib npaug
EN (Tebchaws Europe)	1.4948
ASTM / AISI (USA)	304H, UA 30409
JIS (Nyiv)	SUS 304 H
KS (Korea)	STS 304 H

Nws cov ntsiab lus carbon yog tswj tau nyob rau hauv ntau dua los txhim kho siab - qhov kub thiab txias lub zog thaum tswj kom zoo corrosion kuj.

Element	C	Si	Mn	P	S	Cr	Ni
Cov ntsiab lus (%)	0.04 - 0.10	Tsawg dua lossis sib npaug li 0.75	Tsawg dua lossis sib npaug li 2.0	Tsawg dua lossis sib npaug li 0.045	Tsawg dua lossis sib npaug li 0.03	18.0 - 20.0	8.0 - 10.5

Nws tuav cov cuab yeej zoo ntawm ob chav tsev thiab qhov kub siab, nrog rau kev ua tau zoo tshaj 500 degree.

Khoom	Yield zog (Rp0.2)	Tensile zog (Rm)	Elongation (A)	Hardness (HB)
Tus nqi	Ntau dua lossis sib npaug li 205 MPa	500 - 750 MPa	Ntau dua lossis sib npaug li 40%	Tsawg dua lossis sib npaug li 215

 

Cov yam ntxwv tseem ceeb thiab kev siv ntawm 1.4948 / 304H

Txhim kho qhov kub siab -Temperature Strength:Kev tswj hwm cov ntsiab lus siab dua muab kev txhim kho kev nkag siab thiab kev ntxhov siab tawg lub zog ntawm qhov kub siab tshaj 500℃piv rau tus qauv 304 lossis 304L.

Zoo Oxidation Resistance:Tuav kev tiv thaiv rau scaling thiab oxidation hauv kev pabcuam txuas mus txog li 900 degree, haum rau ntau qhov siab -kub siv kev lag luam.

Code- Pom zoo rau Kev Pabcuam Siab:Pom zoo nyob rau hauv ASME Boiler thiab Pressure Vessel Code rau siab -cov ntawv thov kub qhov twg nkag siab yog qhov tseem ceeb.

Formability zoo heev:Khaws cov yam ntxwv zoo ntawm 304 tsev neeg, txawm tias cov pa roj carbon ntau dua tuaj yeem txo qis qis dua piv rau 304L.

 

Cov ntawv thov tseem ceeb:

Kev tsim hluav taws xob:Superheater thiab reheater tubing, boiler Cheebtsam, thiab siab -kub headers.

Petrochemical:Catalytic converter shells, cov raj hloov kho, thiab siab -kub txheej txheem kav.

Thaum tshav kub kub Exchangers:Tubing thiab daim hlau hauv cov kev pabcuam uas muaj qhov kub siab.

Lub nkoj siab:Cheebtsam tsim nyob rau hauv ASME cov lej rau siab -kev pabcuam kub.

Cov Khoom Siv Hluav Taws Xob:High -cov khoom siv txheej txheem kub thiab cov kav dej.

 

Qhov txawv ntawm 304H (1.4948) thiab 304L (1.4307) yog dab tsi?
Qhov sib txawv tseem ceeb yog cov ntsiab lus carbon thiab cov kev pab cuam npaj siab . 304H muaj kev tswj cov pa roj carbon ntau ntawm 0.04-0.10% kom ntseeg tau tias siab - qhov kub thiab txias, thaum 304L muaj cov ntsiab lus siab tshaj plaws ntawm 0.03% los tiv thaiv kev hnov ​​mob thiab ua kom zoo heev weldability thiab intergranular corrosion resistance. 304H yog tshwj xeeb creep 7} kev siv rau qhov kub thiab txias, whereas 304L yog qhov zoo dua rau welded fabrications kev khiav hauj lwm ntawm qis kub los yog nyob rau hauv corrosive ib puag ncig uas weld kev ncaj ncees yog qhov tseem ceeb.

 

Vim li cas 304H tau teev nyob rau hauv siab -kub siab lub nkoj lis dej num?
Cov lej xws li ASME Tshooj I thiab Tshooj VIII suav nrog 304H rau siab - qhov kev pabcuam kub vim tias nws tau lees paub cov ntsiab lus carbon tsawg kawg ua kom ntseeg tau tias muaj zog creep thiab kev ntxhov siab tawg ntawm qhov kub siab. Cov khoom siv kho tshuab no yog qhov tseem ceeb rau kev tsim kev nyab xeeb ntawm lub siab- muaj cov khoom siv ua haujlwm nyob rau hauv qhov kub thiab txias dhau lub sijhawm ntev. Tus qauv 304 lossis 304L tsis tau lees paub qhov tsawg kawg nkaus cov pa roj carbon monoxide thiab yog li tsis tuaj yeem muab tib lub sijhawm ntev - kev ruaj ntseg lub zog yuav tsum tau los ntawm kev suav lej rau siab -kub kev pabcuam lub neej.

 

Nrhiav kev ntseeg siab ntawm 1.4948 / 304H Stainless Hlau?
GNEE Steel muab cov khoom siv siab - kub qib 304H (1.4948) stainless hlau hauv tubular, phaj, thiab bar cov ntaub ntawv, tsim nyog rau kev thov lub zog thiab cov txheej txheem kev lag luam. Peb muab tag nrho cov ntaub ntawv traceability thiab ntawv pov thawj rau cov qauv tsim xws li ASME thiab EN 10204 3.1. Yog tias koj muaj kev xav tau, thov hu rau peb.