Daim ntawv thov ntawm stainless hlau 317 welded kav thiab 316 welded kav
Daim ntawv thov ntawm stainless hlau 317 welded kav thiab 316 welded kav
316 stainless hlau kav ua tau zoo nyob rau hauv ib puag ncig corrosive xws li marine, khoom noj khoom haus, thiab kev siv kho mob, thaum 317/317L stainless hlau kav, nrog lawv cov ntsiab lus molybdenum siab dua, muaj superior corrosion kuj nyob rau hauv xav tau tej yam kev mob xws li tshuaj ua hauj lwm (xws li, sulfuric acid), pulp thiab ntawv manufacturing, thiab flue gas desulfurization. Yog li ntawd, lawv yog tshwj xeeb tshaj yog haum rau kev lag luam ib puag ncig yuav tsum tau txhim khu kev tiv thaiv rau pitting thiab crevice corrosion.
SS316 yeeb nkab yog dab tsi?
316 stainless hlau kav / raj muaj kev tiv thaiv corrosion zoo heev. Piv nrog rau 304 alloy, qib no muaj kev tiv thaiv zoo tshaj plaws rau kev xeb thiab pitting. 316 stainless hlau kav muaj qhov tsawg kawg nkaus tensile lub zog ntawm 515 MPa thiab qhov tsawg kawg nkaus yield zog ntawm 200 MPa.
Xaiv cov khoom siv kav dej zoo yog qhov tseem ceeb rau kev nyab xeeb thiab kev ua neej ntawm txhua qhov kev lag luam. Ob leeg 317 stainless hlau welded kav thiab 316 stainless hlau welded kav yog feem ntau siv nyob rau hauv corrosive los yog siab - kub ib puag ncig vim lawv superior zog thiab corrosion kuj. Txawm li cas los xij, txawm tias qhov sib txawv me me ntawm cov tshuaj muaj pes tsawg leeg tuaj yeem cuam tshuam rau lawv qhov tsim nyog. Ib qho kev xaiv tsis raug tuaj yeem ua rau kev ua tsis tiav thiab kev saib xyuas kim. Nplooj ntawv no yuav piav qhia qhov sib txawv ntawm lawv kom meej. Peb yuav soj ntsuam 317 stainless hlau kav thiab 316 stainless hlau puag ncig cov kav dej nyob rau hauv cov nqe lus ntawm muaj pes tsawg leeg, corrosion kuj, lub zog, thiab tus nqi, ua rau koj txiav txim siab paub rau cov kav dej tseem ceeb.
Txheej txheem cej luam ntawm 316 Hlau Tube thiab 317 Stainless Hlau Yeeb Nkab
Ob leeg 316 thiab 317 stainless hlau yog austenitic stainless hlau. Lawv paub txog lawv lub zog siab thiab corrosion kuj. Qhov sib txawv tseem ceeb nyob hauv lawv cov tshuaj muaj pes tsawg leeg . 317 stainless hlau muaj cov ntsiab lus molybdenum ntau dua li 316 stainless hlau. Nws yog cov khoom siv ntxiv no uas ua rau 317 stainless hlau ua tau zoo dua hauv qhov chaw muaj corrosive heev. Ob qib ntawm stainless hlau muaj cov khoom zoo heev. Lawv muaj lub zog tensile siab (piv txwv li, nyuaj rau tawg) thiab lub zog tawm los zoo (piv txwv li, lub zog yuav tsum tau ua kom deformation mus tas li). Lawv kuj muaj elongation zoo thaum so. Lawv tuaj yeem tiv taus ntau qhov kub thiab txias, ua rau lawv muaj ntau yam. Ob qib ntawm stainless hlau ua tau raws li cov qauv kev lag luam tseem ceeb, xws li ASTM A312 thiab ASME B36.19, kom ntseeg tau qhov zoo thiab sib xws hauv kev siv cov kav dej.
Tshuaj muaj pes tsawg leeg ntawm SS 316 welded kav thiab SS 317 welded kav
| Element | Stainless hlau 316 Welded Tube (UNS S31600) | Stainless hlau 317 Welded Tube (UNS S31700) |
|---|---|---|
| Chromium (Cr) | 16.0 – 18.0 % | 18.0 – 20.0 % |
| Nickel (Ni) | 10.0 – 14.0 % | 11.0 – 15.0 % |
| Molybdenum (hli) | 2.0 – 3.0 % | 3.0 – 4.0 % |
| Cov pa roj carbon (C) | Tsawg dua lossis sib npaug li 0.08% | Tsawg dua lossis sib npaug li 0.08% |
| Manganese (Mn) | Tsawg dua lossis sib npaug li 2.0% | Tsawg dua lossis sib npaug li 2.0% |
| Silicon (Si) | Tsawg dua lossis sib npaug li 1.0% | Tsawg dua lossis sib npaug li 1.0% |
| Phosphorus (P) | Tsawg dua lossis sib npaug li 0.045% | Tsawg dua lossis sib npaug li 0.045% |
| Sulfur (S) | Tsawg dua lossis sib npaug li 0.030% | Tsawg dua lossis sib npaug li 0.030% |
| Hlau (Fe) | Tshuav | Tshuav |
| Nitrogen (N) | Tsawg dua lossis sib npaug li 0.10% | Tsawg dua lossis sib npaug li 0.10% |
Kev sib piv Corrosion Resistance
Xaiv cov qib steel uas tsim nyog feem ntau nyob ntawm nws qhov kev tiv thaiv xeb thiab tshuaj corrosion. Qhov chaw ua haujlwm ntawm cov kav dej txiav txim siab seb cov khoom twg muaj kev nyab xeeb dua thiab siv nyiaj ntau dua rau kev siv sijhawm ntev -.
SS 316 Welded yeeb nkab:
SS 316 muaj kev tiv thaiv corrosion zoo, tshwj xeeb tshaj yog ua tau zoo hauv kev tiv thaiv chloride corrosion. Yog li ntawd, nws yog ib qho kev xaiv zoo tshaj plaws rau kev siv hauv thaj chaw ntug dej hiav txwv lossis ib puag ncig uas muaj dej qab ntsev. Nws pom zoo tiv thaiv ntau yam tshuaj lom neeg. SS 316 welded kav yog dav siv nyob rau hauv daim ntawv thov uas tsis tshua muaj tshuaj corrosion, xws li dej kho nroj tsuag thiab zaub mov kev lag luam. Nws yog ib qho kev txhim khu kev qha thiab ntau yam khoom siv rau ntau daim ntawv thov kev lag luam.
SS 317 Welded yeeb nkab:
SS 317 welded yeeb nkab muaj superior corrosion kuj. Qhov no yog vim nws cov ntsiab lus molybdenum ntau dua. Cov ntsiab lus ntxiv no muab kev tiv thaiv zoo rau pitting thiab crevice corrosion, tshwj xeeb tshaj yog nyob rau hauv cov kua qaub lossis cov tshuaj chloride siab. Nws yog cov khoom siv piping nyiam rau cov nroj tsuag tshuaj corrosive heev thiab desalination cov chaw uas tsis tshua muaj salinity. Nws qhov kev ua tau zoo heev hauv cov cheeb tsam hnyav no txhais tau tias muaj kev pheej hmoo tsawg dua thiab ua haujlwm ntev dua.
| Media | SS 316 Kev ua haujlwm | SS 317 Kev ua haujlwm |
| Cov tshuaj chlorides me me | Zoo | Zoo heev |
| Pitting Resistance | Zoo | Zoo heev |
| Muaj zog Acids | Ncaj ncees rau Zoo | Superior |
| Kub Kub / Corrosive Mix | Nruab nrab | Siab |
Mechanical Strength thiab Durability
Ntxiv nrog rau kev tiv thaiv corrosion, cov kav dej yuav tsum muaj zog txaus los tiv thaiv ntau lub zog uas lawv raug. Lub zog txhua yam ntawm SS 316 thiab SS 317 kom ntseeg tau tias lawv tuaj yeem thauj tau siab - cov kua dej siab thiab tiv thaiv kev puas tsuaj rau lub sijhawm ntev.
SS 316 Welded yeeb nkab:
SS 316 muaj lub zog tensile siab thiab ua haujlwm zoo rau hlau qaug zog. Qhov no txhais tau hais tias nws tuaj yeem tiv taus cov kev ntxhov siab rov qab, xws li kev hloov pauv siab, tsis muaj kev tawg sai. Nws qhov kev ua tau zoo yog qhov ruaj khov thiab txhim khu kev qha ntawm qhov kub nruab nrab, ua rau nws muaj kev ntseeg siab rau ntau qhov kev sib hloov cua sov thiab kev siv lub nkoj siab. Qhov kev sib xyaw ua ke ntawm lub zog thiab durability ua rau lub neej ua haujlwm ntev nrog kev saib xyuas ib txwm muaj.
SS 317 Welded yeeb nkab:
SS 317 feem ntau muaj zog tensile me ntsis dua li SS 316, txawm hais tias ob leeg muaj zog heev. Qhov tseem ceeb tshaj, nws qhov kev tiv thaiv corrosion zoo dua txhais tau tias nws tuav nws lub zog kom ntev dua hauv qhov chaw hnyav. Corrosion erodes cov hlau thiab txo lub zog thaum lub sij hawm; vim 317 qhov zoo dua corrosion kuj, nws feem ntau pom muaj zog dua kev ua haujlwm qaug zog thiab ua haujlwm zoo dua hauv cov corrosive, siab - qhov kub thiab txias. Qhov no feem ntau txo qhov xav tau kev hloov pauv ntau zaus.
Tej kev siv
Qhov chaw ua haujlwm yog qhov tseem ceeb hauv kev xaiv cov kav dej zoo tshaj plaws. Txhua qib ntawm cov yeeb nkab pom nws qhov chaw tsim nyog tshaj plaws vim nws cov khoom sib xyaw tshwj xeeb.
SS 316 Welded yeeb nkab:
SS 316 yog cov khoom siv dav dav rau ntau daim ntawv thov. Vim nws yooj yim ntawm kev ntxuav thiab tsis kam mus rau cov tshuaj me me corrosive, nws yog dav siv hauv kev lag luam khoom noj thiab dej haus. SS 316 kuj yog ib qho kev xaiv txhim khu kev qha nyob rau hauv ib puag ncig marine uas muaj dej hiav txwv corrosion tab sis tsis tas mus li. Nws kuj yog ib qho kev xaiv txhim khu kev qha rau kev lag luam kws tshuaj thiab qee qhov chaw ntawm kev lag luam roj thiab roj uas siv cov tshuaj corrosive tsawg.
SS 317 Welded yeeb nkab:
SS 317 yog tsim los rau cov kev xav tau tshaj plaws. Nws lub siab corrosion kuj ua rau nws tseem ceeb heev rau corrosive tshuaj nroj tsuag tuav concentrated acids. Nws yog cov khoom siv zoo tshaj plaws rau cov dej hiav txwv zoo heev xws li offshore platforms. Nws kuj tseem siv rau hauv cov nroj tsuag desalination vim tias cov ntsiab lus chloride siab ntawm seawater sai corrodes lwm cov ntaub ntawv. Kev lag luam aerospace thiab lub zog tsim hluav taws xob kuj tseem siv SS 317 rau cov khoom tshwj xeeb siab -kev ua tau zoo.
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