tsim cov pob qij txha tsis-tas mus li; uas yog, cov pob qij txha uas tuaj yeem tshem tawm lossis

Nyob rau hauv cov ntawv thov loj heev, chromium thiab npib tsib xee hom stainless hlau yog siv vim tias lawv cov cua sov thiab xeb-tsis kam. Pom nyob rau hauv cov ntawv thov uas yuav tsum muaj siab dua, stainless hlau dav hlau tubing tuaj yeem ua haujlwm lossis welded, zoo li ua haujlwm tau siv nrog qee hom tshuaj xeb. Cov roj carbon tsawg ntawm cov hlau stainless yog ib qho kev xaiv rau welded seem.

Tsis suav txog N08367 tseem hu ua Alloy Al6XN yog cov carbon ntau, siab purity, nitrogen-batoy nrog zoo heev rau chloride pitting thiab compevice corrosion.

304 Piping spools yog tsim los ntawm 304 stainless hlau, ib qho khoom siv nrov thiab nrov tshaj plaws hauv ntau cov ntawv thov uas xav tau kev tiv thaiv kom xeb thiab oxidation. Cov kev tshaj lij no yog preooss siv cov machinery thiab cov txheej txheem tshwj xeeb, uas paub meej tias lawv muaj tseeb thiab ntseeg tau.

Lub tshuab hluav taws xob stainless hlau yog cov khoom ntawm kev xaiv rau nqa cov tshuaj corrosive lossis cov roj av, tshwj xeeb yog qhov kev ntsuas siab, siab dua ib puag ncig muaj kev koom tes. Raws li qhov tshwm sim ntawm kev ua kom zoo nkauj ntawm cov hlau stainless, cov yeeb nkab feem ntau siv hauv cov ntawv thov archectural.

Ib lub pob tw weld yeeb nkab haum yog tsim kom muaj welded rau ntawm nws cov (s) kom txuas cov yeeb nkab sib txuas ua ke thiab tso cai rau kev hloov pauv lossis lub hlab lossis xaus.

Txawm hais tias muaj cov pa roj carbon ntau heev ntawm kev ua lag luam, rau cov ntawv thov uas yuav tsum tau ua zoo dua cov khoom siv zoo sib xws thiab cov neeg siv feem ntau nyiam siv qib 304 stainless hlau. SS 304 qhov muag dig flanges yog ua los ntawm 304 stainless hlau thiab muaj ntau yam. Muaj ntau hom sib txawv ntawm cov hlau stainless 304 flanges, xws li SS 304 tiab hauv qab rau kev nyab xeeb rau sab hauv lossis SS 304 tus dig muag rau kev xaus kav dej.

Ib Flange yog ib qho kev tawm tsam, daim di ncauj lossis sab nraud, tog twg los sab nraud lossis sab hauv, uas yog cov nqaj hlau xws li ib tug t-nqaj); Rau cov ntawv yooj yim tau yooj yim \ / hloov ntawm kev sib cuag nrog lwm yam khoom (raws li flange thaum kawg ntawm cov yeeb nkab, chav dej lub tog raj kheej, lossis ntawm lub ntsej muag lub koob yees duab); Los yog rau kev ruaj khov thiab taw qhia kev txav ntawm lub tshuab lossis nws cov ntu (raws li sab hauv flange ntawm tsheb ciav hlau lossis lub log los ntawm kev khiav tawm ntawm cov ciav hlau). Lo lus "Flange" kuj yog siv rau hom cuab yeej siv los ua cov flanges.

Cov stainless hlau yeeb nkab fittings muaj cov corrosion zoo heev thiab qhov tseeb ntawm kev sib raug zoo. Peb cov cuab yeej ntawm cov yeeb nkab hluav taws xob suav nrog pob tw weld yeeb nkab haum & ntsuas thiab ferrule haum muaj nyob rau ntau qhov sib txawv, peb tseem muab kev kho kom haum raws li cov neeg yuav tsum tau ua.

Cov ntsiab lus npib tsib xee nyob rau hauv stainless hlau unsed s9400 dig muag flanges tiv thaiv cov khoom siv xeb, suav nrog acetic acid thiab phosphoric acid, uas yog ib qho acid.

Al6XN yog superaustenitic steel hlau nrog kev ua tau zoo rau chloride pitting, crevice corrosion thiab kev nyuaj siab corrosion tawg. Al6XN yog 6 Moly alloy uas tau tsim rau thiab siv hauv kev sib cav sib ceg siab. Nws muaj cov npib tsib xee (24%), Molybdenum (6.3%), nitriumen thiab chromium cov ntsiab lus tawg, thiab tshwj xeeb corrosion tiv thaiv. Al6XN yog feem ntau siv rau nws cov kev txhim kho pitting thiab crevice corrosion tsis kam hauv chlorides. Nws yog ib qho tsim nyog thiab weldable stainless hlau.
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1-4 nti stainless hlau yeeb nkab fittings zoo tshaj plaws huv tais cuab
304 ss weld caj dab flange
Duplex Steel Daim Hlau & Cov Ntawv Qhia & Coils
SS 316 Seamless Yeeb Nkab thiab ASTM A312 Welded Yeeb Nkab Khoom Siv Hauv Suav
Stainless hlau din hex bolt nrog ib nrab xov thiab txiv ntseej

Cov fittings yog puab thiab tom qab ntawd rhuab mus rau lub siab kub raws li kev txias txias kom ze rau qhov txias txias hauv cov huab cua tseem. Qhov kev txias txias no ntxiv ntxiv rau lub zog ntawm lub stainless hlau 310 cov yeeb nkab fittings thiab ua rau lawv muaj zog ntau. Lub ss 310s haum siv nyob rau hauv kev lag luam zoo li dej hiav txwv ua, thermal zog tiam cov nroj tsuag thiab cov piping ntau li. 310s ss Weld fittings siv nyob rau hauv cov chav kawm siab sib txawv los daws tau cov kev xav tau ntawm daim ntawv thov ib yam nkaus.
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Duplex Steel Daim Hlau & Cov Ntawv Qhia & Coils
SS 316 Seamless Yeeb Nkab thiab ASTM A312 Welded Yeeb Nkab Khoom Siv Hauv Suav
Yeeb Nkab Flange Ntev Vuam caj dab Lwn Stainless Hlau Flange

SAE 304 stainless hlau yog qhov feem ntau steel hlau. Cov hlau muaj ob txoj kev chromium (nruab nrab ntawm 18% thiab 20%) thiab thib pua (nruab nrab ntawm 8%) [1] cov hlau uas yog cov qauv hlau tseem ceeb. Nws yog ib tus neeg siv tshuaj hlau tsis huv. Nws tsis tshua muaj hluav taws xob thiab cuam tshuam cov khoom siv hluav taws xob ntau dua li cov hlau. Nws sib nqus, tab sis tsis sib nqus dua li hlau. Nws muaj ntau dua corrosion tsis kam ntau dua li cov hlau tsis tu ncua thiab siv dav siv vim yog qhov yooj yim nyob rau hauv ntau yam duab. [1]

Lub Stainless Hlau Qib 1.4539 raj vim muaj tooj liab nce qhov tsis kam ntawm cov hlau. Tubes lossis cov kav dej muaj nyob rau hauv cov duab sib txawv los ua cov haujlwm sib txawv.

Ib lub flange yog lub nplhaib ntawm cov hlau (forged, txiav los ntawm phaj, lossis koom nrog cov yeeb nkab ntawm cov yeeb nkab, lossis los koom nrog cov hlab ntsha, lossis mus ua ke lossis lwm qhov chaw sib dhos. Flanges tau koom nrog txhua lwm yam los ntawm kev siv pas dej los ntawm vuam los yog xov (lossis xoob thaum cov quav xaus yog siv). Stainless hlau Flange Tau yooj yim raws li ss flange, nws yog hais txog cov flanges uas ua los ntawm stainless hlau. Cov qauv qauv ib txwm muaj thiab qib AN182% F304 \ / L thiab / L thiab / / /50.

Lub 316 cov yeeb nkab stainless hlau tau dhau los ua cov khoom siv tsis tau rau cov kev lag luam lag luam. Qhov no alloy ntawm hlau thiab chrome tau lees paub rau nws lub siab tiv taus corrosion, nrog rau nws cov kav ntev. 316 Stainless hlau Tubing tuaj yeem tsim nyob rau hauv ob leeg seamless thiab welded leeg kom tau raws li cov neeg siv khoom xav tau.
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1-4 nti stainless hlau yeeb nkab fittings zoo tshaj plaws huv tais cuab
304 ss weld caj dab flange
Duplex Steel Daim Hlau & Cov Ntawv Qhia & Coils
SS 316 Seamless Yeeb Nkab thiab ASTM A312 Welded Yeeb Nkab Khoom Siv Hauv Suav
Qhov loj me "Od: 1 \ / 2" "~ 48" "

ASME B36.19M yog tus qauv kev qhia tshwj xeeb rau cov kav hlau stainless hlau, uas qhia txog kev ua siab ntev, thiab tsim khoom rau cov kav dej thiab cov txiv ntseej.

904L WASHERS yog ua los ntawm cov tsis muaj-stabilized cov roj carbon siab loj alloy ustenitic steel. Qhov kev sib ntxiv ntawm cov qib kawm no muab nws txhim kho kom zoo dua rau kev txo cov kua qaub muaj zog, tshwj xeeb yog cov sulfuric acid. Nws tseem tiv taus chloride nres ¨c ob qho pitting \ / crevice corrosion thiab kev nyuaj siab corrosion tawg. Cov qib kawm no tsis yog sib nqus nyob rau txhua qhov xwm txheej thiab muaj kev sib tw zoo heev thiab muaj peev xwm. Tus qauv Austenitic kuj tseem muab cov qib no zoo heev, txawm tias qhov kub tsis txias. Vim nws cov kev tiv thaiv kev tiv thaiv corrosive, 904L tuaj yeem ua rau hauv bolts, cov txiv ntoo, studs, ntswj lub taub hau cap screws, nrog rau ntau yam kev sib tw ntawm lwm lub fasteners.

316 Cov Hluav Taws Xob Cov Yeeb Nkab Siv Hauv Kev Lag Luam thiab Cov Khoom Siv Hluav Taws Xob Hauv Cov Nroj Tsuag Cov Nroj Tsuag, Cov Ntawv, Cov Khoom Siv Hluav Taws Xob, thiab cov khoom siv dav dav, thiab cov khoom siv dav dav.
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304 ss weld caj dab flange
Duplex Steel Daim Hlau & Cov Ntawv Qhia & Coils
SS 316 Seamless Yeeb Nkab thiab ASTM A312 Welded Yeeb Nkab Khoom Siv Hauv Suav
2.5 nti Stainless Hlau Yeeb 316 1.440 \ / 1.4436 yeeb nkab

ASTM A312 TP316 yog tus qauv txheem rau kev sib khi, ncaj-leeg welded, thiab hnyav txias welded ustenitic kav hlau stainless hlau thiab kev corrosive service. Lub 316 seamless muaj steel yeeb nkab yog tsim los ntawm kev sib xyaw ntawm cov chromium, npib tsib, thiab molybdenum ua rau corrosion thiab xeb thiab xeb thiab xeb thiab xeb.
DupleX Steel Flanges
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Alloy Steel Flanges
Stainless Hlau Flanges Khoom Siv
1-4 nti stainless hlau yeeb nkab fittings zoo tshaj plaws huv tais cuab
304 ss weld caj dab flange
Duplex Steel Daim Hlau & Cov Ntawv Qhia & Coils
SS 316 Seamless Yeeb Nkab thiab ASTM A312 Welded Yeeb Nkab Khoom Siv Hauv Suav
Qhov loj me "Od: 1 \ / 2" "~ 48" "

Stainless Hlau Fasteners
ASTM A453 npog 5 cov qhab nia ntawm cov qhab nia nrog 12 txog 1227 MPA] rau cov khoom siv kub siab xws li cov hlab rastel thiab cov flative flanges. Cov lus qhia tshwj xeeb yog qhia nyob rau hauv nti phaus units thiab Si units. Lub npe hu ua nag lossis daus tawv stainless hlau, cov tshuaj no yog ib qib Austenic uas qee zaum yuav raug hu ua Nickel Alloy. Qhov no yog vim Astm A453 Qib 660 bolts yog txuam nrog cov ntsiab lus nickel siab rau cov hlau tsis muaj zog.

316L yeeb nkab fittings cov pa roj carbon ntau ntawm 316 thiab yog tiv thaiv tau los ntawm kev nkag siab (Lis Ciam Cuam Tshuam Carbide nag lossis daus). Yog li nws yog qhov dav dav hauv kev ntsuas hnyav welded Cheebtsam (dhau li ntawm 6 hli). Muaj feem ntau tsis muaj tus nqi pheej sib txawv ntawm 316 thiab 316L stainless hlau.
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1-4 nti stainless hlau yeeb nkab fittings zoo tshaj plaws huv tais cuab
304 ss weld caj dab flange
Duplex Steel Daim Hlau & Cov Ntawv Qhia & Coils
SS 316 Seamless Yeeb Nkab thiab ASTM A312 Welded Yeeb Nkab Khoom Siv Hauv Suav
dismantled yam tsis muaj kev puas tsuaj rau cov koom nrog.

Txhawm rau kom xa cov raj xa dej, nws yog ib qho tsim nyog los tshem cov hose ncaj hauv cov raj xa dej. Thaum siv ntau lub raj xa dej, ntau yam kav dej yuav tsum tau siv. Thaum twg cov raj xa dej siv, lub luj tshib yuav tsum tau siv los hloov qhov loj ntawm cov raj xa dej. Thaum bifurcating, peb-txoj kev xaim cov flange kev sib txuas siv thaum lub raj xa hluav taws xob thiab kev sib txuas txias thiab kev sib tw txias thiab kev sib koom ua ke txias. , Hauv kev sib txuas ntawm ntau cov twj paj nruag, kuj tseem muaj cov txuas txuas thiab ntsaws ntawm cov twj paj nruag theem.

Cov lus sib dhos uas ua rau cov hlau ¡® ®Sainless yog yog chromium; Txawm li cas los nws yog qhov sib ntxiv ntawm Nickel uas ua rau cov hlau tsis muaj hlau los ua xws li cov hlau ntau yam.

Lub Flange yog qhov thib ob feem ntau siv koom nrog txoj kev tom qab selding. Kev siv flanges tau siv thaum cov pob qij txha xav tau dismantling. Nws muab kev hloov tau rau kev saib xyuas. Flange txuas cov yeeb nkab nrog ntau yam khoom siv thiab li qub. Breakup Flanges tau ntxiv rau hauv cov raj xa hluav taws yog tias kev saib xyuas tsis tu ncua thaum lub sijhawm cog ntoo.

SAE 304 stainless hlau yog qhov feem ntau steel hlau. Cov hlau muaj ob txoj kev chromium (nruab nrab ntawm 18% thiab 20%) thiab thib pua (nruab nrab ntawm 8%) [1] cov hlau uas yog cov qauv hlau tseem ceeb. Nws yog ib tus neeg siv tshuaj hlau tsis huv. Nws tsis tshua muaj hluav taws xob thiab cuam tshuam cov khoom siv hluav taws xob ntau dua li cov hlau. Nws sib nqus, tab sis tsis sib nqus dua li hlau. Nws muaj ntau dua corrosion tsis kam ntau dua li cov hlau tsis tu ncua thiab siv dav siv vim yog qhov yooj yim nyob rau hauv ntau yam duab. [1]

https: \ / \ / www.htpipe.com \ / stainpipe
? Tus qauv hlau kav hlau steel yog tsim raws ASTM A312 tus qauv. Cov khoom muaj nyob hauv qib SS316 \ / 316L thiab ua rau tus qauv ntev ntawm 6 meters ntev. Dual qib SS316 \ / 316L Cov kav dej kav hlau hluav taws xob tau paub kom xa cov kev ua tau zoo tshwj xeeb thiab feem ntau tsim los ua lub rooj sib tham.

Cov ntsiab lus tsib xee nyob hauv 316 ss pab txhim kho nws cov ntsiab lus ntsev uas muaj rau 304. Yog li ntawd, hauv cov cheeb tsam muaj tshuaj muaj kuab lom lossis muaj kuab lom, tshwj xeeb yog chloride.

Zhengzhou Huitong Pipeline Equipment Co., Ltd.
ASTM A453 npog 5 cov qhab nia ntawm cov qhab nia nrog 12 txog 1227 MPA] rau cov khoom siv kub siab xws li cov hlab rastel thiab cov flative flanges. Cov lus qhia tshwj xeeb yog qhia nyob rau hauv nti phaus units thiab Si units. Lub npe hu ua nag lossis daus tawv stainless hlau, cov tshuaj no yog ib qib Austenic uas qee zaum yuav raug hu ua Nickel Alloy. Qhov no yog vim Astm A453 Qib 660 bolts yog txuam nrog cov ntsiab lus nickel siab rau cov hlau tsis muaj zog.

SAE 304 stainless hlau yog qhov feem ntau steel hlau. Cov hlau muaj ob txoj kev chromium (nruab nrab ntawm 18% thiab 20%) thiab thib pua (nruab nrab ntawm 8%) [1] cov hlau uas yog cov qauv hlau tseem ceeb. Nws yog ib tus neeg siv tshuaj hlau tsis huv. Nws tsis tshua muaj hluav taws xob thiab cuam tshuam cov khoom siv hluav taws xob ntau dua li cov hlau. Nws sib nqus, tab sis tsis sib nqus dua li hlau. Nws muaj ntau dua corrosion tsis kam ntau dua li cov hlau tsis tu ncua thiab siv dav siv vim yog qhov yooj yim nyob rau hauv ntau yam duab. [1]

Stainless hlau yog ib qho alloy ntawm cov hlau uas tiv taus xeb. Nws muaj tsawg kawg yog 11% chromium thiab tej zaum yuav muaj cov ntsiab lus xws li carbon, lwm yam tsis yog lwm yam kom tau lwm yam uas xav tau. Stainless hlau qhov tsis kam rau corrosion tau los ntawm cov chromium, uas ua cov yeeb yaj kiab passive uas tuaj yeem tiv thaiv cov khoom thiab kho tus kheej nyob rau hauv lub xub ntiag ntawm oxygen.

Ib lub flange yog lub nplhaib ntawm cov hlau (forged, txiav los ntawm phaj, lossis koom nrog cov yeeb nkab ntawm cov yeeb nkab, lossis los koom nrog cov hlab ntsha, lossis mus ua ke lossis lwm qhov chaw sib dhos. Flanges tau koom nrog txhua lwm yam los ntawm kev siv pas dej los ntawm vuam los yog xov (lossis xoob thaum cov quav xaus yog siv). Stainless hlau Flange Tau yooj yim raws li ss flange, nws yog hais txog cov flanges uas ua los ntawm stainless hlau. Cov qauv qauv ib txwm muaj thiab qib AN182% F304 \ / L thiab / L thiab / / /50.

Alloy 304 yog cov Austenitic Alloy, uas yog tsim cov qauv loj ntawm npib tsib xee thiab chromium. Lub stainless hlau 304 yeeb nkab \ / raj yog tsim nrog high corrosion thiab oxidation tsis kam tshaj tawm cov khoom.

Featuring 304 Stainless Hlau Rau Heev Zoo Corrosion, Qhov kev pom zoo Weld Neck Flange tuaj yeem txuas nrog lub kaw lus weld ntawm lub caj dab. Welded thaj chaw tuaj yeem raug tshuaj xyuas yooj yim los ntawm radiography. Matched yeeb nkab thiab Flange Bore txo cov cua hlob thiab kev yaig hauv raj dej. Flange yog zoo heev rau siv nyob rau hauv koj daim ntawv thov tseem ceeb thiab yog qhov zoo rau siv nrog huab cua, dej, roj, nkev, thiab chav dej.
DupleX Steel Flanges
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Alloy Steel Flanges
Stainless Hlau Flanges Khoom Siv
1-4 nti stainless hlau yeeb nkab fittings zoo tshaj plaws huv tais cuab
304 ss weld caj dab flange
Duplex Steel Daim Hlau & Cov Ntawv Qhia & Coils
SS 316 Seamless Yeeb Nkab thiab ASTM A312 Welded Yeeb Nkab Khoom Siv Hauv Suav
dismantled yam tsis muaj kev puas tsuaj rau cov koom nrog.

Qhov kev haum no ces ua ib feem ntawm cov kab ke rau kev thauj cov dej (roj, roj, kua, yam ntxwv zoo, dhau los ntawm kev ncua ntev lossis ntev dua.

Stainless hlau hloov leeg, xa mus rau interchappeases li stainless hlau kav, yog siv nyob rau hauv ntau yam kev lag luam thiab chaw nyob. Seb nws puas yog qhov ua rau engineering, kav haum lossis tsim kev tsim khoom, lossis tsuas yog qhov yuav tsum tau ua me me los ntawm ib tug hobbanist, tainless cov hlua hlau nyob rau ntau qhov ntau thiab tsawg.
316L Cov Yeeb Nkab Ntxiv
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Stainless hlau yeeb nkab haum rau 316L lauj tshiav rau kev siv high-corrosion
304 ss weld caj dab flange
Duplex Steel Daim Hlau & Cov Ntawv Qhia & Coils

904L WASHERS yog ua los ntawm cov tsis muaj-stabilized cov roj carbon siab loj alloy ustenitic steel. Qhov kev sib ntxiv ntawm cov qib kawm no muab nws txhim kho kom zoo dua rau kev txo cov kua qaub muaj zog, tshwj xeeb yog cov sulfuric acid. Nws tseem tiv taus chloride nres ¨c ob qho pitting \ / crevice corrosion thiab kev nyuaj siab corrosion tawg. Cov qib kawm no tsis yog sib nqus nyob rau txhua qhov xwm txheej thiab muaj kev sib tw zoo heev thiab muaj peev xwm. Tus qauv Austenitic kuj tseem muab cov qib no zoo heev, txawm tias qhov kub tsis txias. Vim nws cov kev tiv thaiv kev tiv thaiv corrosive, 904L tuaj yeem ua rau hauv bolts, cov txiv ntoo, studs, ntswj lub taub hau cap screws, nrog rau ntau yam kev sib tw ntawm lwm lub fasteners.

Txawm hais tias muaj cov pa roj carbon ntau heev ntawm kev ua lag luam, rau cov ntawv thov uas yuav tsum tau ua zoo dua cov khoom siv zoo sib xws thiab cov neeg siv feem ntau nyiam siv qib 304 stainless hlau. SS 304 qhov muag dig flanges yog ua los ntawm 304 stainless hlau thiab muaj ntau yam. Muaj ntau hom sib txawv ntawm cov hlau stainless 304 flanges, xws li SS 304 tiab hauv qab rau kev nyab xeeb rau sab hauv lossis SS 304 tus dig muag rau kev xaus kav dej.
316L 1.4401 tus yeeb nkab stainless hlau yog ib qho kev xaiv yeeb nkab zoo heev thiab cov yeeb nkab ruaj khov siv hauv ntau cov ntawv siv. Qhov no ss s31603 yeeb nkab yog tsim los ntawm cov hlau zoo 316L stainless ua rau corrosion, oxidation thiab staining rau cov chaw hnyav lossis kev siv ntxhov siab.

Ib txoj kev sib koom ua ke flanged yog tsim ntawm peb cais thiab ywj siab yog tias muaj kev sib cuam tshuam; Cov flanges, lub gaskets, thiab cov bolting; Uas tau sib sau los ntawm kev cuam tshuam lwm tus cuam tshuam, fitter. Cov kev tswj tshwj xeeb yuav tsum muaj nyob rau hauv kev xaiv thiab kev xaiv ntawm tag nrho cov muaj cov ntsiab lus kom muaj kev sib koom ua ke, uas tau siv tau xau nruj.
Ntshav firmware, tseem hu ua cov qauv ntawm kev ua lag luam, yog ib qho dav dav rau ib hom kev siv tshuab uas siv los txuas ob lossis ntau qhov (lossis cov khoom siv) rau hauv tag nrho. Nws yog tus cwj pwm los ntawm ntau cov ntawm cov specifications, kev ua yeeb yam sib txawv thiab siv, thiab qib siab ntawm generalization. Fasteners yog cov neeg siv tshuab cov khoom siv kho tshiab tshaj plaws thiab muaj txiaj ntsig zoo.
Stainless hlau kav muaj zoo intergrosion corrosion tsis kam, zoo heev corrosion tsis kam thiab ua haujlwm txias thiab tuaj yeem siv ua cov hlau kub-tiv taus stainless hlau. Nyob rau tib lub sijhawm, cov khoom siv mechanical ntawm cov hlau yog tseem zoo ntawm -180. Nyob rau hauv cov kev daws teeb meem hauv lub xeev, cov plastonity, muaj zog thiab txias ua haujlwm muaj xeb tawm hauv oxidizing acid, cua, dej thiab lwm yam xov xwm. Yog li ntawd, 304 stainless hlau yog cov hlau nrog cov zis loj tshaj plaws thiab siv thiab cov siv dav hlau feem ntau.