Nyob rau hauv hnyav industrial ib puag ncig,347H thiab 317L stainless hlausawv cev rau ob qho kev qhia kev ua tau zoo . 347H, nrog nws cov niobium stabilization kev kho mob, tsom rau siab - qhov kub thiab txias tsis kam . 317L, ntawm qhov tod tes, boasts superior tiv thaiv chloride pitting thiab crevice corrosion vim nws cov ntsiab lus molybdenum siab.
HT PIPE yog ib tug thawj coj stockist thiab exporter thoob ntiaj teb nrog ntau tshaj 15 xyoo ntawm kev txawj ntse nyob rau hauv thoob ntiaj teb kev lag luam. Peb muab cov kav dej, daim hlau, cov kab tuav, thiab ntau yam ntawm cov yeeb nkab fittings, flanges, thiab li qub.Tiv tauj pebtam sim no rau cov quotes dawb thiab cov ntaub ntawv khoom ntiag tug.
Tshuaj muaj pes tsawg leeg sib txawv ntawm ss347h thiab ss317l khoom
347H, los ntawm kev sib ntxiv ntawm niobium (Nb) ua ib qho chaw ruaj khov, zoo inhibits nag lossis daus ntawm chromium carbide ntawm cov nplej, yog li muab kev tiv thaiv zoo heev rau intergranular corrosion, tseem ceeb heev rau cov khoom siv welded thiab cov cuab yeej siv hauv cov xov xwm rhiab heev. Nws qhov siab - kub lub zog thiab nkag siab kuj tseem zoo dua rau cov hlau tsis zoo austenitic (xws li 304).347H stainless hlaupom zoo qis-kub toughness nyob rau hauv lub xeev annealed thiab tsis yog-magnetic.
Qhov tseem ceeb ntawm 317L yog nyob rau hauv nws cov ntsiab lus siab molybdenum (Mo) (feem ntau tshaj 3%). Molybdenum ho txhim khu cov khoom tiv thaiv rau pitting thiab crevice corrosion nyob rau hauv chloride ib puag ncig thiab lwm yam uas txo cov xov xwm. Lub caij no, nws cov ntsiab lus tsis tshua muaj carbon (L) kom ntseeg tau tias cov khoom tsis hnov tsw los ntawm carbide nag lossis daus thaum vuam thiab kub ua haujlwm, yog li tswj tau zoo corrosion kuj.
347h thiab 317l Corrosion Resistance thiab siab -Tsub Ua Haujlwm
Kev xaiv hauv Corrosive Environments
347H:Resistant zoo tiv thaiv corrosion los ntawm ntau yam acids, alkalis, thiab ntsev daws, thiab pom zoo oxidation kuj nyob rau hauv huab cua qis dua 800 degree.
317L: Nyob rau hauv ib puag ncig uas muaj cov tshuaj chlorides (xws li dej hiav txwv, brine, thiab qee yam txheej txheem tshuaj), nws tsis kam mus rau pitting thiab crevice corrosion feem ntau zoo tshaj 347H. Nws kuj tiv thaiv corrosion los ntawm sulfuric acid, acidic chlorine, thiab phosphoric acid.
Kev xaiv ntawm Kub Kub
347H: Vim nws cov ntsiab lus carbon ntau dua thiab cov nyhuv stabilizing ntawm niobium, 347H nthuav tawm lub zog ntau dua thiab zoo dua nkag los ntawm qhov kub thiab txias. Thaum lub ntsuas kub ua haujlwm tsis tu ncua siab tshaj 500 degree, tshwj xeeb tshaj yog siab dua 600 degree, 347H feem ntau yog qhov kev xaiv tsim nyog.
317L:Txawm hais tias 317L kuj qhia tau zoo siab - qhov kub thiab txias, nws qhov txiaj ntsig tseem ceeb yog tsis nyob rau hauv ntev - lub sij hawm siab - qhov kub thiab txias. Nws yog ib qho tseem ceeb uas yuav tsum nco ntsoov tias nyob rau hauv qhov ntsuas kub ntawm 800℃F - 1500℃F (kwv yees li 427℃- 816 degree), qhov qis -carbon 317L muaj kev tiv thaiv zoo dua rau intergranular corrosion los ntawm carbide nag lossis daus.
Vuam thiab Machining
347H:Muaj kev weldability zoo. Rau vuam, ER347 lossis ER347H vuam hlau feem ntau pom zoo kom ua tiav qhov kev sib tw vuam.
317L: Nws qis - carbon tsim tau ua rau zoo weldability, thiab post-weld corrosion kuj tsis tshua muaj degradation vim rhiab heev. ER317L vuam hlau feem ntau yog siv rau vuam.
Yuav ua li cas xaiv ss347h thiab ss317l?
Chloride Kev txhawj xeeb
Yog tias cov cuab yeej raug chlorides, cov khoom siv tiv thaiv pitting corrosion thiab kev ntxhov siab corrosion tawg yuav tsum tau ua tib zoo soj ntsuam. Hauv qhov no, 317L, vim nws cov ntsiab lus molybdenum siab dua, feem ntau muaj kev txhim kho corrosion ntau dua.
Kev ntsuas kub siab thiab Creep Stress Assessment
Rau cov khoom siv uas yuav tsum tau ua haujlwm ntev - lub sijhawm ua haujlwm ntawm qhov kub siab (piv txwv li, siab dua 500℃) thiab nyob rau hauv qee qhov kev ntxhov siab, 347H yog qhov zoo dua vim nws qhov siab tshaj - qhov kub thiab txias tsis kam.
Manufacturing txheej txheem xav txog
Thaum cov khoom muaj cov txheej txheem nyuaj, xav tau kev vuam dav, thiab tsis tuaj yeem ua haujlwm tom qab-weld solution annealing:
- 347H, los ntawm niobium stabilization, muaj qhov tsis kam tiv thaiv intergranular corrosion.
- 317L, ntawm qhov tod tes, tso siab rau nws cov khoom qis -carbon los tiv thaiv kev nkag siab ntawm qhov chaw welded.
Ob leeg muab kev tiv thaiv, tab sis lawv cov txheej txheem ntawm kev ua txawv.
Tus nqi thiab kev ua lag luam muaj
Feem ntau, vim nws cov ntsiab lus siab dua (tshwj xeeb yog molybdenum), 317L yuav raug nqi ntau dua 347H. Txawm li cas los xij, tus nqi kawg thiab kev ruaj ntseg ntawm cov khoom yuav tsum tau txheeb xyuas ua ke nrog rau cov khoom lag luam tshwj xeeb thiab kev xav tau.
Technical FAQ
Q1: 317L puas tuaj yeem siv rau hauv siab - daim ntawv thov kub hloov 347H?
A1:Tsis yog. 317L yog qib qis- carbon qib (max 0.03% C) tshwj xeeb tsim los txwv kev nkag siab hauv cov kev pabcuam ntub dej. Ntawm qhov kub siab (siab tshaj 425 degree), qis- qib carbon tsis muaj qhov tsim nyog nkag tau- tawg lub zog xav tau los ntawm ASME cov lej. 347H nta cov pa roj carbon ntau dua ua ke nrog niobium stabilization, tshwj xeeb tailored rau sustained siab -kub load bearing.
Q2: Vim li cas 317L muab kev tiv thaiv zoo dua li 347H?
A2:Pitting kuj muaj feem cuam tshuam ncaj qha rau cov hlau alloy cov ntaub ntawv tshuaj, suav los ntawm Pitting Resistance Equivalent Number. 317L muaj 3.0% mus rau 4.0% Molybdenum, qhov 347H tsis txhob txwm molybdenum ntxiv. Qhov no muab 317L ib qho PREN ntau dua, ua rau nws zoo dua ntawm kev tiv thaiv chloride-induced pitting.
Q3: Dab tsi yog cov qauv thoob ntiaj teb siv rau347Hthiabcev 317lfittings thiab flanges?
A3:Forged Cheebtsam xws li flanges thiab li qub yog tswj hwm los ntawmASTM A182 / ASME SA182. Wrought Hoobkas-ua pob tw-weld piping fittings (xws li lub luj tshib thiab tees) yog nyob rau hauvASTM A403 / ASME SA403. Cov kav dej yog tus qauv qhia rauASTM A312 / ASME SA312 / ASTM A312 / ASTM A312 / ASTM A312 / ASME SA312 / ASTM A312 / ASTM A312 / ASME SA312 / ASTM A312 / ASME SA312 / ASTM A312 / ASTM A312 / ASME SA312 / ASTM A312 / ASME SA312 / ASTM A312 / ASME SA312 / ASTM A312 / ASTM A312 / ASME SA312 / ASTM A312 / ASTM A312 / ASME SA312 / ASTM A312 / ASTM A312 / ASTM A312 / ASME SA312).
Hu rau tam sim no
