1.4404 Stainless hlau yog dab tsi?

1.4404 stainless hlau, feem ntau hu ua 316L lossis UNS S31603, yog qhov qis -carbon variant ntawm tus qauv 316 molybdenum-alloyed austenitic stainless hlau. Nws txo qis cov ntsiab lus carbon (tsawg dua lossis sib npaug li 0.03%) txhim kho kev tiv thaiv kev sib txhuam hauv cov txheej txheem raws li -welded, ua rau nws qhov kev xaiv zoo tshaj plaws rau cov khoom siv welded hnyav, cov khoom siv tshuaj, cov khoom siv tshuaj, thiab cov ntawv thov marine qhov twg ob qho tib si corrosion kuj thiab weld kev ncaj ncees tseem ceeb heev. Raws li ib qho ntawm ntau yam thiab dav siv stainless hlau, nws muaj qhov sib npaug zoo ntawm corrosion kuj, formability, thiab weldability.

 

Qhov qis -carbon molybdenum- qib kev txhim kho no yog tus qauv hauv txhua lub tshuab thoob ntiaj teb loj.

Txuj	Qib sib npaug
EN (Tebchaws Europe)	1.4404
ASTM / AISI (USA)	316L, UA S31603
JIS (Nyiv)	SUS 316L
KS (Korea)	STS 316 L
Lub Npe	316L

Cov ntsiab lus carbon tsawg (tsawg dua lossis sib npaug li 0.03%) thiab molybdenum ntxiv (2-3%) yog qhov tseem ceeb rau nws txoj kev ua tau zoo.

Lub ntsiab	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	16.5 - 18.5	10.0 - 13.0	2.0 - 2.5

Nws muaj lub zog zoo thiab zoo ductility, zoo ib yam li tus qauv 316.

Khoom	Yield zog (Rp0.2)	Tensile zog (Rm)	Elongation (A)	Hardness (HB)
Tus nqi	Ntau tshaj lossis sib npaug li 200 MPa	490 - 690 MPa	Ntau dua lossis sib npaug li 40%	Tsawg dua lossis sib npaug li 215

 

Cov yam ntxwv tseem ceeb thiab kev siv ntawm 1.4404 / 316L

Superior Weldability yam tsis muaj rhiab heev:Cov ntsiab lus carbon tsawg (tsawg dua lossis sib npaug li 0.03%) txo qis kev tsim cov chromium carbide thaum lub sij hawm vuam, tiv thaiv intergranular corrosion nyob rau hauv tshav kub- cuam tshuam cheeb tsam yam tsis tas yuav tsum tau tom qab -weld tshav kub kho.

Txhim kho Corrosion Resistance:Qhov sib ntxiv ntawm molybdenum (2-2.5%) muab kev tiv thaiv zoo dua rau pitting thiab crevice corrosion nyob rau hauv ib puag ncig uas muaj chloride piv rau 304/304L.

Zoo Acid Resistance:Muab kev txhim kho kev ua tau zoo hauv sulfuric, phosphoric, thiab acetic acid ib puag ncig, ua rau nws tsim nyog rau kev siv tshuaj lom neeg.

Zoo heev Formability thiab Toughness:Ua kom zoo ductility thiab cuam tshuam cov yam ntxwv ntawm austenitic stainless hlau, txawm nyob rau hauv qhov kub thiab txias.

 

Cov ntawv thov tseem ceeb:

Tshuaj & Pharmaceutical:Tank, reactors, piping, thiab cov hlab ntsha rau corrosive xov xwm yuav tsum tau siab purity.

Marine & Coastal:Nkoj fittings, offshore platforms, thiab cov khoom uas raug dej hiav txwv los yog ntsev tsuag.

Kev kho mob & Khoom noj khoom haus ua:Cov cuab yeej phais, kev cog qoob loo, thiab cov khoom siv uas yuav tsum tau ua kom tsis muaj menyuam thiab ua kom huv.

Architectural:High-kawg façades, railings, thiab cov qauv nyob rau hauv cov pa phem los yog ntug hiav txwv cua.

Pulp & Ntawv:Cov cuab yeej ua haujlwm hauv cov tshuaj bleaching thiab tshuaj rov qab.

Kev Lag Luam Textile:Cov khoom siv dyeing thiab bleaching ua haujlwm.

 

Thaum twg kuv yuav tsum xaiv 316L (1.4404) dhau 316 (1.4401)?
Xaiv 316L thaum cov khoom yuav raug welded hnyav heev thiab tsis tuaj yeem xa mus rau -weld thaum tshav kub kub kho, lossis thaum twg nws yuav siv rau hauv qhov kub thiab txias (450-850℃). Qhov no suav nrog cov tuab -section welds, ntau- kis welds, lossis cov ntawv thov uas cov qauv welded yuav raug rau qhov chaw corrosive. 316L kuj nyiam rau qhov hnyav corrosive ib puag ncig uas qhov siab tshaj plaws corrosion yuav tsum tau, thiab rau cov ntawv thov kev pom zoo los ntawm cov hlab ntsha siab. Rau cov ntawv thov uas muaj qhov vuam me me los yog qhov chaw muaj zog ambient siab ntawm qhov kub siab yog xav tau, tus qauv 316 tej zaum yuav haum thiab pheej yig dua me ntsis.

 

Puas yog 316L muaj lub zog siv tshuab qis dua 316 vim nws cov ntsiab lus qis dua?
In practice, the difference in room-temperature mechanical properties between annealed 316 and 316L is minimal and often within specification overlap. Both grades meet similar minimum strength requirements (200 MPa yield for 316L, 205 MPa for 316). The primary advantage of 316L is its corrosion resistance after welding or high-temperature exposure, not a reduction in ambient strength. At elevated temperatures (>500℃), 316 tej zaum yuav muaj zog nkag siab me ntsis vim nws cov ntsiab lus carbon ntau dua, uas yog vim li cas 316H (siab-} carbon)) tau teev tseg rau siab - kev pabcuam kub.

 

Dab tsi yog qhov kev txiav txim siab vuam rau 316L?
316L 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 (ER316L rau TIG/MIG, E316L-16 rau SMAW) raug pom zoo kom muaj kev tiv thaiv corrosion. 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.

 

Nrhiav kev ntseeg siab ntawm 1.4404 / 316L Stainless Hlau?
GNEE Steel muab cov khoom zoo - zoo 316L (1.4404) stainless hlau nyob rau hauv tag nrho cov qauv qauv - phaj, ntawv, coil, yeeb nkab, bar, hlau, thiab fittings-nrog rau kev ua hauj lwm cov kev pab cuam xws li txiav, dabtsi yog khoov, sib sau, thiab nto finishing. Peb muab cov ntaub ntawv pov thawj tag nrho (EN 10204 3.1) thiab xyuas kom cov khoom xa tuaj raws sij hawm rau ob qho tib si Tshuag thiab kev txiav txim. Yog tias koj muaj kev xav tau, thov koj xav tiv tauj peb.