Dab tsi stainless hlau yog 1.4438 sib npaug?

Mar 18, 2026

Tso lus

1.4438 stainless hlau, feem ntau hu ua 317L los yog UNS S31703, yog tsawg-carbon, molybdenum-alloyed austenitic stainless hlau nrog txhim kho corrosion kuj piv rau 316L. Nrog ntau dua molybdenum thiab chromium cov ntsiab lus, nws muaj superior tiv thaiv rau pitting thiab crevice corrosion nyob rau hauv aggressive chloride ib puag ncig, raws li zoo raws li kev tiv thaiv kom txhob acids. Nws cov ntsiab lus carbon tsawg ua kom zoo weldability yam tsis muaj rhiab heev, ua rau nws yog qhov kev xaiv zoo tshaj plaws rau kev thov cov tshuaj ua haujlwm, cov ntaub so ntswg thiab ntawv, thiab cov ntawv siv tshuaj uas 316L qhov kev tiv thaiv corrosion tsis txaus.

Txuj	Qib sib npaug
EN (Tebchaws Europe)	1.4438
ASTM / AISI (USA)	317L, UA S31703
JIS (Nyiv)	SUS 317L
KS (Korea)	STS 317 L
Lub Npe	317L

Element	C	Si	Mn	P	S	Cr	Ni	Mo
Cov ntsiab lus (%)	Tsawg dua los yog sib npaug li 0.03	Tsawg dua los yog sib npaug rau 1.0	Tsawg dua lossis sib npaug li 2.0	Tsawg dua lossis sib npaug li 0.045	Tsawg dua los yog sib npaug li 0.03	18.0 - 20.0	11.0 - 15.0	3.0 - 4.0

Khoom	Yield zog (Rp0.2)	Tensile zog (Rm)	Elongation (A)	Hardness (HB)
Tus nqi	Ntau dua lossis sib npaug li 205 MPa	500 - 700 MPa	Ntau dua lossis sib npaug li 40%	Tsawg dua lossis sib npaug li 215

Superior Pitting thiab Crevice Corrosion Resistance:Cov ntsiab lus molybdenum siab dua (3-4%) muab qhov ua tau zoo dua rau pitting thiab crevice corrosion hauv chloride ib puag ncig piv rau 316L (2-3% Mo), nrog PREN feem ntau 28-30 vs . 24-26 rau 316L.

Enhanced Acid Resistance:Muab kev txhim kho kev tiv thaiv kom txo tau cov kua qaub xws li sulfuric thiab phosphoric acid, tshwj xeeb tshaj yog nyob rau hauv ntau dua thiab kub.

Weldability zoo heev:Cov ntsiab lus qis qis tiv thaiv kev hnov mob thaum vuam, tshem tawm qhov xav tau tom qab-weld kho cua sov.

Zoo Siab -Tsub Muaj Zog:Khaws cov khoom zoo txhua yam ntawm qhov kub siab txog li 450 degree.

Kev ua tshuaj lom neeg:Tank, reactors, heat exchangers, thiab piping rau aggression tshuaj, tshwj xeeb tshaj yog nyob rau hauv sulfuric thiab phosphoric acid kev pab.

Pulp & Ntawv:Cov khoom siv tshuaj ntxuav tes, cov tshuab zom zaws, thiab cov tshuab tuav cov tshuaj chlorine dioxide thiab lwm yam tshuaj tua kab mob hnyav.

Pharmaceutical:High - cov khoom siv purity yuav tsum tau txhim kho corrosion kuj.

Kev Lag Luam Textile:Cov khoom siv rau dyeing thiab bleaching nrog cov tshuaj phem heev.

Pollution Control:FGD scrubbers thiab ducting nyob rau hauv ib puag ncig nruj heev.

Kev ua zaub mov:Cov cuab yeej siv siab - cov khoom noj khoom haus chloride.

317L muaj kev txhim kho corrosion kuj piv rau 316L vim nws cov molybdenum ntau dua (3-4% vs. 2-3%) thiab chromium (18-20% vs. 16-18%) cov ntsiab lus. Qhov no muab kwv yees li 15-20% zoo dua pitting tsis kam (PREN 28-30 vs. 24-26) thiab txhim kho kev tiv thaiv kom txo cov kua qaub. Nws yog qhov zoo tshwj xeeb hauv cov cheeb tsam uas muaj cov tshuaj chloride ntau dua, qhov kub siab, lossis cov tshuaj lom neeg hnyav dua. Txawm li cas los xij, 317L yog me ntsis kim dua thiab tej zaum yuav muaj tsawg tsawg formability piv rau 316L. Kev xaiv ntawm lawv nyob ntawm qhov hnyav ntawm qhov chaw corrosive: 317L raug xaiv thaum 316L qhov kev tiv thaiv corrosion yog marginal.

317L muaj qhov zoo tshaj plaws weldability siv txhua txoj hauv kev xws li TIG, MIG, SMAW, thiab SAW. Muab cov hlau sib xyaw ua ke (ER317L rau TIG/MIG, E317L-16 rau SMAW) tau pom zoo kom muaj kev tiv thaiv corrosion hauv thaj tsam weld. Cov ntsiab lus tsis tshua muaj carbon tshem tawm qhov xav tau rau kev tshaj tawm -weld kho cua sov, txawm rau cov ntu tuab. Kev pom zoo cua sov yog feem ntau 0.5-2.0 kJ / mm, nrog interpass kub hauv qab 150 degree. Shielding gas (argon los yog argon nrog 2-5% nitrogen) tiv thaiv lub pas dej ua ke. Tom qab-weld tu thiab pickling / passivation yog pom zoo kom rov qab txheej passive thiab xyuas kom zoo corrosion kuj.

317L yog qhov tsim nyog rau ntau qhov kub thiab txias los ntawm cov kab mob cryogenic mus txog 450℃(842℃F) rau kev pabcuam txuas ntxiv. Nws cov ntsiab lus carbon tsawg ua kom muaj zog zoo ntawm qhov kub thiab txias, thaum nws cov ntsiab lus alloy siab dua muab lub zog tuav zoo ntawm qhov kub siab. Rau corrosion kuj, nws ua tau zoo txog li 300℃hauv ntau qhov chaw. Tshaj 450℃, ntev - lub sij hawm raug tuaj yeem ua rau muaj kev hloov pauv microstructural uas tuaj yeem cuam tshuam rau cov khoom, yog li qhov kub siab dua yuav tsum raug ntsuas raws li cov ntawv thov tshwj xeeb.

GNEE Steel muab cov khoom siv siab - zoo 317L (1.4438) stainless hlau hauv phaj, ntawv, yeeb nkab, bar, thiab cov ntaub ntawv haum rau kev thov rau daim ntawv thov uas yuav tsum tau txhim kho corrosion kuj. Peb muab cov ntaub ntawv pov thawj tag nrho (EN 10204 3.1) thiab kev txhawb nqa suav nrog kev txiav, khoov, sib sau, thiab kev pabcuam vuam. Yog tias koj muaj kev xav tau, thov koj xav tiv tauj peb.