Stainless hlau 304 1.4301

Stainless hlau 304 thiab stainless hlau 304L kuj hu ua 1.4301 thiab 1.4307 raws li. Hom 304 yog cov khoom siv ntau yam thiab dav siv stainless hlau. Nws tseem yog qee zaum raug xa mus los ntawm nws lub npe qub 18/8 uas yog muab los ntawm cov nominal muaj pes tsawg leeg ntawm hom 304 yog 18% chromium thiab 8% npib tsib xee. Hom 304 stainless hlau yog qib austenitic uas tuaj yeem sib sib zog nqus nqus. Cov cuab yeej no tau ua rau 304 yog qib tseem ceeb siv hauv cov ntawv thov xws li cov dab dej thiab cov saucepans. Hom 304L yog cov pa roj carbon tsawg ntawm 304. Nws yog siv rau hauv cov ntsuas hnyav rau kev txhim kho weldability. Qee cov khoom xws li cov phaj thiab cov kav dej yuav muaj xws li "dual certified" cov khoom uas ua tau raws li cov qauv rau 304 thiab 304L. 304H, qhov sib txawv ntawm cov pa roj carbon ntau, kuj muaj rau kev siv ntawm qhov kub thiab txias. Cov khoom uas tau muab rau hauv daim ntawv qhia no yog qhov zoo rau cov khoom lag luam tiaj tus uas them los ntawm ASTM A240 / A240M. Nws yog qhov tsim nyog los cia siab tias cov kev qhia tshwj xeeb hauv cov qauv no yuav zoo sib xws tab sis tsis tas yuav zoo ib yam rau cov uas tau muab rau hauv cov ntaub ntawv no.

Daim ntawv thov

• Saucepans
• Springs, screws, ceev & bolts
• Sinks & txaws rov qab
• Architectural vaj huam sib luag
• Tubing
• Brewery, khoom noj khoom haus, khoom noj siv mis thiab tshuaj tsim khoom
• Sanitaryware thiab troughs

Cov ntawv muab khoom

• Daim ntawv
• Sawb
• Bar
• Phaj
• Yeeb
• Tube
• Coil
• Fittings

Alloy Designations

Stainless hlau qib 1.4301/304 kuj sib raug rau: S30400, 304S15, 304S16, 304S31 thiab EN58E.

Corrosion Resistance

304 muaj corrosion kuj zoo heev nyob rau hauv tej qhov chaw thiab thaum nyob rau hauv kev sib cuag nrog txawv corrosive xov xwm. Pitting thiab crevice corrosion tuaj yeem tshwm sim hauv ib puag ncig uas muaj chlorides. Kev ntxhov siab corrosion tawg tuaj yeem tshwm sim saum 60 ° C.

Thaum tshav kub kub Resistance

304 muaj kev tiv thaiv zoo rau oxidation hauv kev pabcuam sib cuam tshuam txog 870 ° C thiab hauv kev pabcuam txuas mus txog 925 ° C. Txawm li cas los xij, kev siv txuas ntxiv ntawm 425- 860 ° C tsis pom zoo. Hauv qhov piv txwv no 304L tau pom zoo vim nws tsis kam rau carbide nag lossis daus. Yog xav tau lub zog siab ntawm qhov kub siab tshaj 500 ° C thiab mus txog 800 ° C qib 304H raug pom zoo. Cov khoom no yuav khaws cov aqueous corrosion kuj.

Fabrication

Fabrication ntawm tag nrho cov hlau stainless yuav tsum tau ua nrog cov cuab yeej tshwj xeeb rau cov ntaub ntawv stainless hlau. Cov cuab yeej thiab cov chaw ua haujlwm yuav tsum tau ntxuav kom huv si ua ntej siv. Cov kev ceev faj no yog tsim nyog kom tsis txhob muaj kev sib kis ntawm cov hlau tsis muaj hlau los ntawm cov hlau yooj yim corroded uas yuav ua rau tsis muaj xim ntawm cov khoom tsim.

Ua haujlwm txias

304 stainless hlau yooj yim ua hauj lwm hardens. Fabrication txoj kev uas muaj kev ua hauj lwm txias yuav xav tau ib tug nruab nrab annealing theem kom alleviate ua hauj lwm hardening thiab tsis txhob tearing los yog cracking. Thaum ua tiav ntawm fabrication ib tug tag nrho annealing ua hauj lwm yuav tsum tau ua hauj lwm los txo cov kev ntxhov siab nyob rau hauv thiab optimize corrosion kuj.

Kub Ua Haujlwm

Fabrication txoj kev zoo li forging, uas cuam tshuam nrog kev ua haujlwm kub yuav tsum tshwm sim tom qab cov cua sov tsis sib xws rau 1149-1260 ° C. Tom qab ntawd cov fabricated Cheebtsam yuav tsum tau txias sai heev kom ntseeg tau tias siab tshaj corrosion kuj.

Machineability

304 muaj machinability zoo. Machining tuaj yeem txhim kho los ntawm kev siv cov cai hauv qab no: Txiav cov npoo yuav tsum tau ceev ceev. Cov npoo dull ua rau kev ua haujlwm hnyav heev. Kev txiav yuav tsum yog lub teeb tab sis tob txaus los tiv thaiv kev ua haujlwm nyuaj los ntawm kev caij tsheb ntawm cov khoom siv. Chip breakers yuav tsum tau ua hauj lwm los pab kom ntseeg tau tias swarf tseem tsis tau ua haujlwm. Tsawg thermal conductivity ntawm austenitic alloys ua rau kub siab ntawm cov npoo txiav. Qhov no txhais tau tias cov coolants thiab lubricants yog qhov tsim nyog thiab yuav tsum tau siv ntau heev.

Kev kho cua sov

304 stainless hlau tsis tuaj yeem hardened los ntawm kev kho cua sov. Kev kho los yog annealing tuaj yeem ua tau los ntawm kev ua kom txias sai tom qab cua sov rau 1010-1120 ° C.

Weldability

Fusion vuam kev ua tau zoo rau hom 304 stainless hlau yog zoo heev ob qho tib si nrog thiab tsis muaj fillers. Pom zoo muab tub lim thiab electrodes rau stainless hlau 304 yog qib 308 stainless hlau. Rau 304L qhov pom zoo muab tub lim yog 308L. Hnyav welded seem yuav xav tau tom qab vuam annealing. Cov kauj ruam no tsis tas yuav tsum tau 304L. Qib 321 tuaj yeem siv yog tias tsis tuaj yeem kho tom qab vuam kub.

Chemical Compositionsa)