SUS304H Stainless hlau

SUS304H yog lub siab -carbon austenitic stainless hlau (C=0.04-0.10) tsim los rau siab - qhov kub thiab txias. Cov pa roj carbon ntau dua txhim kho creep tsis kam ntawm 500-800 degree, ua rau nws tsim nyog rau kev siv hluav taws kub kub uas SUS304 lub zog tsis txaus.

Chemical Composition (wt%): C=0.04-0.10, Si Less dua lossis sib npaug rau 1.00, Mn Tsawg dua lossis sib npaug 2.00, P Tsawg dua lossis sib npaug 0.045, S Less dua lossis sib npaug rau 0.030, Cr=18.00-20.00, Ni=8.00-10.50, Fe=Sib npaug

Mechanical Properties: Tensile Strength Ntau dua los yog sib npaug rau 515MPa, Yield Strength Ntau dua lossis sib npaug rau 205MPa, Elongation Ntau dua lossis sib npaug li 40%, Hardness (HB) Tsawg dua lossis sib npaug 201

Kev Ua Haujlwm Zoo: Zoo heev -kub creep kuj; zoo oxidation tsis kam ntawm 800 degree; zoo siab -temp zog dua SUS304; weldable nrog cov khoom siv hlau zoo.

Qib sib npaugASTM A 240 304H, EN 1.4307, UNS S30409

Daim ntawv thov: High-kub pipelines, boiler superheater raj, qhov chaw rauv, cua kub exchanger raj hauv fais fab nroj tsuag, tshuaj reactor internals.

FAQ

1. Q: Vim li cas SUS304H thiaj haum rau siab -kub siv? A: Nws 0.04-0.10% carbon txhim kho siab -temp lub zog los ntawm kev daws teeb meem. Ntawm 500-800 degree, carbon atoms pin grain ciam teb, resisting creep (mus tas li deformation nyob rau hauv tas li load). SUS304 (qis C) nkag tau yooj yim ntawm qhov kub siab, thaum SUS304H tswj cov duab. Nws kuj tsim cov txheej tuab Cr-nplua nuj oxide, tiv thaiv oxidation ntawm 800 degree, haum rau qhov cub lossis boiler qhov chaw.

2. Q: Yuav ua li cas kom tsis txhob intergranular corrosion nyob rau hauv SUS304H vuam? A: Siv tsawg-carbon filler hlau (ER308H) kom phim cov ntsiab lus carbon. Tswj cov hluav taws xob hluav taws xob (100-150A rau TIG) kom txo tau qhov chaw nyob hauv vuam lub sij hawm. Tsis txhob muab ntau- hla vuam yam tsis muaj cua txias. Tom qab-weld annealing ntawm 1050-1100℃thiab txias ceev tuaj yeem yaj chromium carbides, rov ua kom muaj kev tiv thaiv corrosion. Rau qhov tseem ceeb (boiler raj), NDT kuaj xyuas kom tsis muaj kab nrib pleb lossis carbide nag lossis daus.

3. Q: Dab tsi yog qhov kev ua haujlwm siab tshaj plaws ntawm SUS304H? A: Nws ua haujlwm tsis tu ncua mus txog 870 degree. Hauv qab 870 degree, nws khaws cov creep kuj thiab oxidation kuj. Kev siv luv luv - siv sijhawm tuaj yeem ncav cuag 925℃tab sis tuaj yeem txo lub neej kev pabcuam. Tshaj 870 degree, nws cov qauv austenite ua tsis ruaj khov, thiab lub zog poob qis heev. Rau qhov kub siab tshaj 900 degree, xaiv SUS310S (siab dua Cr/Ni) kom zoo dua -temp kev ua haujlwm.

4. Q: SUS304H piv rau SUS304 thiab SUS316H li cas? A: vs SUS304: SUS304H muaj siab dua -temp lub zog thiab nkag siab, tab sis chav zoo sib xws-temp zog. vs SUS316H: SUS316H muaj Mo (2-3%), zoo corrosion kuj nyob rau hauv siab - tshuaj kub, tab sis tus nqi siab dua. SUS304H yog tus nqi-hloov rau siab-temp, tsis yog{19}}nrhiav ib puag ncig (cua, chav), thaum SUS316H haum rau high-temp acidic/alkaline tej yam kev mob.

5. Q: SUS304H puas tuaj yeem siv rau hauv qhov chaw qis - qhov kub thiab txias? A: Nws tsis pom zoo. Nws cov pa roj carbon ntau dua txo qis -temp toughness. Ntawm -40℃lossis qis dua, nws tuaj yeem ua nkig, ua rau muaj kev puas tsuaj hauv kev cuam tshuam. SUS304L (qis C) muaj qhov zoo ntawm qhov kub thiab txias, haum rau cov khoom siv cryogenic. SUS304H yog tsim los rau siab temps; siv nws nyob rau hauv qis temps khib nws qhov zoo thiab ua rau muaj kev nyab xeeb, yog li kev xaiv cov khoom yuav tsum ua kom haum rau kev ua haujlwm.