1.4961 Stainless hlau yog dab tsi?

1.4961 stainless hlau, feem ntau hu ua 347H los yog UNS S34709, yog siab -carbon, niobium-stabilized variant ntawm 347 austenitic stainless hlau. Lub npe "H" qhia txog nws qhov kev txhim kho siab - qhov kub thiab txias tsis kam vim kev tswj cov pa roj carbon ntau dua, ua rau nws zoo tagnrho rau kev pabcuam ntev hauv qhov kub siab - qhov kub thiab txias xws li superheaters, heat exchangers, thiab siab hlab ntsha hauv lub zog tsim hluav taws xob thiab petrochemical industries.

 

Qhov siab - qhov ntsuas kub ruaj khov no yog tus qauv raws li cov txheej txheem thoob ntiaj teb tseem ceeb.

Txuj	Qib sib npaug
EN (Tebchaws Europe)	1.4961
ASTM / AISI (USA)	347H, UA S34709
JIS (Nyiv)	SUS 347 H
KS (Korea)	STS 347 H

Niobium (Nb) stabilization thiab tswj cov ntsiab lus carbon yog qhov tseem ceeb rau nws qhov kev ua tau zoo.

Element	C	Si	Mn	P	S	Cr	Ni	Nb
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	17.0 - 19.0	9.0 - 13.0	8xc miv

Nws muaj cov khoom siv hluav taws xob zoo tsim nyog rau siab -kub cov qauv siv.

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 1.4961 / 347H

Zoo heev High -Temperature Creep Strength:Kev sib xyaw ua ke ntawm niobium stabilization thiab tswj cov ntsiab lus carbon muab kev nkag siab zoo dua thiab kev ntxhov siab rupture tsis kam ntawm qhov kub siab tshaj 500 degree, outperforming standard 347.

Resistance rau Sensitization:Niobium tsim cov carbides ruaj khov, tiv thaiv chromium depletion ntawm cov ciam teb ntawm cov qoob loo thiab ua kom muaj kev tiv thaiv rau intergranular corrosion nyob rau hauv qhov kub thiab txias ntau yam (450-850 degree).

Zoo Oxidation Resistance:Ua kom tsis kam mus rau qhov ntsuas thiab oxidation hauv kev pabcuam txuas mus txog li 900 degree.

 

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 phaj nyob rau hauv siab - kub, siab - kev pabcuam siab.

Aerospace:High -kub cav thiab tso pa tawm.

 

347H (1.4961) txawv ntawm tus qauv 347 (1.4550) li cas?
Qhov sib txawv tseem ceeb yog cov ntsiab lus ntawm cov pa roj carbon monoxide. 347H muaj cov pa roj carbon ntau ntawm 0.04-0.10%, kom ntseeg tau tias cov pa roj carbon ntau dua los lav qhov muaj zog nkag siab ntawm qhov kub siab. Standard 347 muaj qhov siab tshaj plaws carbon txwv ntawm 0.08% uas tsis muaj qhov yuav tsum tau yam tsawg kawg nkaus . 347H yog li ntawd teev nyob rau hauv ASME thiab lwm yam siab hlab ntsha code rau siab - kub structural daim ntawv thov qhov ntev -lub sij hawm creep kuj tseem ceeb heev.

 

Vim li cas niobium (Nb) siv los ua tus stabilizer hauv 347H hloov titanium?
Niobium muab cov carbides ruaj khov dua li titanium ntawm qhov kub thiab txias, uas yog qhov tseem ceeb rau kev tswj lub zog thiab tiv thaiv kev nkag siab ntawm kev ua haujlwm ntev. Niobium carbides tsis tshua muaj peev xwm yaj los yog oxidize thaum vuam lossis siab - qhov kub thiab txias, ua rau 347H tshwj xeeb tshaj yog haum rau hnyav welded seem thiab cov khoom raug rau cyclic cua sov thiab txias.

 

Nrhiav kev ntseeg siab ntawm 1.4961 / 347H Stainless Hlau?
GNEE Steel muab cov khoom siv siab - kub qib 347H (1.4961) stainless hlau hauv tubular, phaj, thiab bar cov ntaub ntawv, tsim los rau kev xav tau lub zog, petrochemical, thiab aerospace applications. Peb muab tag nrho cov ntaub ntawv traceability thiab ntawv pov thawj rau cov qauv tsim. Yog tias koj muaj kev xav tau, thov koj xav tiv tauj peb.