1.4432 vs . 1.4404 Stainless hlau

Cov khoom siv twg yog 1.4432 sib npaug?

EN 1.4432 feem ntau sib npaug rau AISI 316L (los yog UNS S31603) stainless hlau, feem ntau lees paub tias yog siab dua -molybdenum version ntawm 316L rau kev tiv thaiv corrosion zoo dua. Nws yog austenitic chromium-nickel-molybdenum steel feem ntau siv hauv kev ua tshuaj lom neeg, dej hiav txwv, thiab chaw muag tshuaj, qee zaum hu ua 316C lossis 316S13.

 

Qhov txawv ntawm 1.4404 thiab 316L yog dab tsi?

Qhov tseem ceeb tsis txawv; 1.4404, tus qauv European (EN) tsim, yog tib yam khoom siv raws li 316L, tus qauv Asmeskas (AISI/ASTM). 316L yog qis- carbon, austenitic stainless hlau nrog zoo corrosion kuj, tshwj xeeb tshaj yog nyob rau hauv chloride- muaj ib puag ncig. Lawv muaj cov tshuaj lom neeg muaj pes tsawg leeg thiab cov khoom zoo sib xws, tab sis 316L cov ntsiab lus qis carbon muab cov weldability zoo heev thiab tsis kam mus rau rhiab heev.

 

1.4432 vs . 1.4404 Stainless hlau: Tshuaj muaj pes tsawg leeg

Lub ntsiab	1.4404 (316L)	1.4432 (Dubplex 2205)
Cov pa roj carbon (C)	Tsawg dua lossis sib npaug li 0.03%	Tsawg dua lossis sib npaug li 0.03%
Chromium (Cr)	16.5–18.5%	21–23%
Nickel (Ni)	10–14%	4.5–6.5%
Molybdenum (hli)	2–3%	2.5–3.5%
Nitrogen (N)	0.03%	0.08–0.20%
Hlau (Fe)	Tshuav	Tshuav

Kev nkag siab tseem ceeb:Duplex 1.4432 muaj ntau duaCr thiab Mo, ntxiv rau ntxiv nitrogen, muab nwszoo pitting thiab crevice corrosion kuj, tshwj xeeb tshaj yog nyob rau hauv dej hiav txwv thiab chloride-ib puag ncig raug.

 

1.4432 vs . 1.4404 Stainless hlau: Mechanical Properties

Khoom	1.4404 (316L)	1.4432 (Dubplex 2205)
Yield zog (MPa)	Ntau dua lossis sib npaug rau 205	Ntau dua lossis sib npaug li 450
Tensile zog (MPa)	515–720	620–880
Elongation (%)	Ntau dua lossis sib npaug li 40	Ntau dua lossis sib npaug li 25
Hardness (HB)	Tsawg dua los yog sib npaug li 95	Tsawg dua lossis sib npaug li 290

 

1.4432 vs . 1.4404 Stainless Steel: Corrosion Resistance

1.4432 stainless hlau muaj superior corrosion kuj piv rau 1.4404 (316L) vim nws cov ntsiab lus molybdenum siab dua (feem ntau nyob ib ncig ntawm 2.5-}3.0%, piv rau kwv yees li 2.0-2.5% rau 1.4404), ua rau muaj kev tiv thaiv zoo dua rau pitting thiab crevice corrosion nyob rau hauv seawater chloride- Thaum 1.4404 tsim nyog rau qhov dav dav, me ntsis acidic, thiab chloride-muaj ib puag ncig, 1.4432 yog qhov zoo dua rau kev thov ntau dua thiab corrosive.

Qib	PREN (Pitting Resistance Tus lej sib npaug)
1.4404	24–26
1.4432	32–35

 

Qhov txawv ntawm 1.4404 thiab 1.4401 yog dab tsi?
Qhov sib txawv tseem ceeb yog tias 1.4404 (316L) nruj me ntsis txwv nws cov ntsiab lus carbon tsawg dua lossis sib npaug rau 0.03% (piv rau Tsawg dua lossis sib npaug li 0.08% rau 1.4401/316). Qhov no txo ​​qhov kev pheej hmoo ntawm rhiab heev thaum vuam thiab txhim kho kev tiv thaiv intergranular corrosion. Lawv tuaj yeem hloov pauv tau hauv ntau daim ntawv thov, nrog 316L (1.4404) yog qhov kev xaiv zoo tshaj plaws rau vuam lossis siab - qhov chaw huv huv, xws li cov khoom siv tshuaj, tshuaj, thiab kev lag luam marine.

 

Dab tsi yog qhov txawv ntawm 1.4404 thiab 1.4435 stainless hlau?

1.4435 yog ntau dua - alloy, hwm version ntawm 1.4404 (316L), muab kev tiv thaiv corrosion zoo dua vim nws cov molybdenum siab dua (Ntau dua lossis sib npaug li 2.5%) thiab cov ntsiab lus nickel, ua rau nws zoo tagnrho rau kev lag luam tshuaj thiab tshuaj lom neeg. Thaum 1.4404 yog tus qauv, muaj ntau yam, tus nqi- siv tau, thiab cov khoom siv tiv taus zoo heev, 1.4435 muaj kev tiv thaiv zoo dua rau pitting corrosion hauv chloride- nplua nuj ib puag ncig.

 

1.4432 vs . 1.4404 Stainless hlau: Daim ntawv thov

Kev lag luam	1.4404	1.4432
Kev ua tshuaj lom neeg	Acid tanks, kav dej	Aggressive acid / chloride pipelines
Marine & Offshore	Nruab nrab corrosion piping	Seawater twj tso kua mis, desalination
Khoom noj & dej haus	Hygienic pipelines	Tsis tshua xav tau
Roj & Roj	Cov kav dej siv hluav taws xob	Siab -siab, siab -corrosion pipelines
Thaum tshav kub kub Exchangers	Kev pabcuam dav dav	chloride los yog brine pab