Stainless hlau yog cov hlau alloy siab uas tuaj yeem tiv taus corrosion hauv huab cua lossis tshuaj lom neeg corrosive media. Stainless hlau tsis tas yuav raug kho saum npoo xws li xim plating, tab sis nws kuj tseem tuaj yeem muaj cov yam ntxwv ntawm cov hlau tsis huv. Los ntawm metallographic foundations, stainless hlau muaj chromium, uas tsim ib tug nyias chromium zaj duab xis rau saum npoo. Zaj yeeb yaj kiab no tuaj yeem cais covstainless hlau castingslos ntawm intruding oxygen, yog li muab corrosion kuj. Yuav kom tswj tau qhov kev tiv thaiv corrosion ntawm stainless hlau, feem ntau hais lus, stainless hlau yuav tsum muaj ntau tshaj 12% chromium.
347 stainless hlau yog qib hauv ASTM A240 / 240M tus qauv. Nws yog austenitic stainless hlau. Hauv Suav teb, cov qib sib xws ntawm 347 stainless hlau yog 0Cr18Ni11Nb. Vim tias nws muaj qee qhov nyiaj ntawm niobium (Nb), 347 stainless hlau muaj kev tiv thaiv zoo rau crystallographic corrosion, thiab muaj zog thiab plasticity. 347 stainless hlau muaj oxidation zoo thiab weldability nyob rau hauv cov huab cua hauv qab no 800 ° C.
347 stainless hlau muaj qhov zoo corrosion kuj nyob rau hauv cov tshuaj lom neeg xws li acids, alkalis, thiab ntsev tov. Qhov kub-kub kev ntxhov siab rupture kev ua tau zoo thiab high-temperature creep resistance stress mechanical zog ntawm 347 stainless hlau yog zoo dua li cov ntawm304 stainless hlau. Nws daim ntawv thov teb kuj yog dav heev, xws li aviation, tsim hluav taws xob, chemistry, petrochemical kev lag luam, khoom noj khoom haus, ntawv ua,tso tawm manifold, lwm.
Cov tshuaj muaj pes tsawg leeg ntawm 347 stainless hlau yog raws li nram no:
Cov pa roj carbon C: ≤0.08%
Silicon Si: ≤1.00%
Manganese Mn: ≤2.00%
Phosphorus P: ≤0.045%
Sulfur S: ≤ 0.030%
Chromium Cr: 17.00-19.00 Nws
Nickel Nis: 9.00-12.00 Nws
Niobium Nb: ≥10 * C%
Cov khoom siv kho tshuab ntawm 347 stainless hlau (lub xeev daws teeb meem) yog raws li hauv qab no:
Yield zog (N / mm2) ≥205
Tensile zog (N / mm2) ≥515
Elongation (%) ≥ 40
Hardness: HB: ≤187
Post lub sij hawm: Dec-09-2023