JIS G3444 STK490yog ib tus qauv Japanese (JIS) cov lus qhia tshwj xeeb rauCarbon Steel leeg siv rau cov hom phiaj dav hlauCov. Hauv qab no yog cov ncauj lus kom ntxaws ntawm cov khoom no:

Qauv Txheej txheem cej luam

Tus Qauv Qauv: JIS G3444

Teem nqi: Stk490

Lub npe: Carbon Steel tubes rau cov qauv dav dav

Tau luag: Tus qauv no qhia txog cov tseev kom muaj rauSeamless thiab Welded Carbon Steel LeegSiv hauv kev tsim kho, tshuab, thiab lwm yam cuab yeej siv uas muaj zog thiab weldability yuav tsum muaj.

Tshuaj Muaj Tshuaj

Carbon (c): Qhov siab tshaj plaws 0.18%. Carbon yog thawj qhov tseem ceeb ntxiv dag zog rau hauv cov hlau, tab sis ntau dhau tuaj yeem txo nws txoj kev nruj thiab weldability.

Silicon (si): Qhov siab tshaj plaws 0.55%. Silicon tuaj yeem txhim kho cov hlau lub zog thiab hardness, thiab nws kuj muaj qee qhov deseoxidizing cuam tshuam.

Manganese (MN): Ntau tshaj 1.65%. Manganese txhim kho cov hlau txoj kev nruj thiab hnav tsis kam.

Phosphorus (p): Ntau tshaj 0.035%. Phosphorus khaws cia rau theem qis kom tsis txhob brittleness.

Sulphur (s): Ntau tshaj 0.035%. Zoo li phosphorus, leej faj los kuj tau tswj los tiv thaiv tus brittleness.

Cov Khoom Siv Neeg Kho Tshuab

Lub zog tensile: Yam tsawg kawg 490 n / mm². Qhov no qhia tau qhov kev ntxhov siab tshaj plaws siab tshaj plaws cov khoom tuaj yeem tiv thaiv thaum tab tom ncab lossis rub tawm ua ntej tawg.

Paib lub zog: Yam tsawg kawg yog 315 n / mm². Tawm lub zog yog qhov kev ntxhov siab uas cov khoom pib ua kom deform plastically.

Elongation: Tsawg kawg yog 23% rau cov leeg nrog cov taub sab nraud ntawm ntau tshaj 40 hli. Kev ntsuas kev sib tw elongation lub ductility ntawm cov hlau, uas yog nws lub peev xwm yuav ncab yam tsis muaj qhov tawg.

Flattening kuj: Qhov kev ncua deb ntawm cov phiaj tiaj tus yuav tsum yog 7 / 8D (d sawv cev rau sab nraud ntawm lub raj ntawm lub raj).

Ntaus: Lub khoov yog li kaum sab xis yog 90℃nrog rau sab hauv vojvoog ntawm 6d.

ERW PIPES

Txoj kev lag luam

Tsis ntse: Tsim los ntawm kub dov lossis txias kos duab yam tsis muaj ib leeg.

Cov Hluav Taws Xob Hluav Taws Xob Welded (ERW): Cov raj yog tsim los ntawm vuam cov npoo ntawm tus hlau sawb ua ke.

Taub qab Welded: Qhov xaus ntawm ob tus kav dej hlau yog welded ua ke.

Tsis siv neeg arc welded: Txoj kev vuam yog automated siv ARC.

Nto Kho

Daim plhaub: Cov raj tau muab coated los tiv thaiv kev tiv thaiv corrosion.

Daim duab: Painting tuaj yeem thov rau lub hom phiaj zoo nkauj thiab kev txhim kho corrosion ntxiv.

Galvanizing: Lub galvanized txheej tuaj yeem siv rau txhim kho corrosion tsis kam.

Qhov ntev thiab kev ua kom muaj kev puas tsuaj

Qho loj

Sab nraud ntawm lub taub: Ranges los ntawm 21.7 hli txog 1016.0 hli (cov lus piav qhia ntxaws kom pom JIS G344-202-202-20 Rooj rau)

Phab Ntsa Thickness: Ranges los ntawm 2.0 hli txog 22 hli (cov lus qhia ntxaws ntxaws kom pom JIS G344-202-2021-202 lub rooj rau)

Qho ntev: Feem ntau 3 txog 18 meters

Kev thev

Sab Nraum Diam Dag Kuj^a)

Kev sib faib	Sab nraud ntawm lub taub^b)	Thev taus ntawm	Siv tau faib
Kev sib faib	Sab nraud ntawm lub taub^b)	Sab nraud ntawm lub taub^c)	Siv tau faib
Hoob 1	Hauv qab 50 hli	± 0.5 hli	Thov thaum tsis muaj kev tshwj xeeb. Siv tau rau kub -} tiav cov kauj siv seamless tiav.
Hoob 1	50 hli lossis tshaj	± 1%
Hoob 2	Hauv qab 50 hli	± 0.25mm	Thov thaum muaj kev qhia tshwj xeeb. Tsis muaj feem xyuam rau kub -} tsau cov steelless cov leeg.
Hoob 2	50 hli lossis tshaj	± 0.5%
Sau ntawv	^a)Rau cov chaw hauv zos xws li kev kho cov khoom uas yog lub phab ntsa tuab tuaj yeem paub tseeb tias yog hauv qab no, sab nraud ntawm lub rooj yuav tsum tau siv.
	^b)Cov txheej txheem rau kev ntsuas qhov sab nraud ntawm cov leeg ntawm 350mm nyob sab nraud ntawm lub taub yuav txiav txim siab ntev. Kev sib hloov sib hloov ntawm sab nraud ntawm txoj kab uas hla l
	^c)Kev thev xim nyob sab nraud ntawm qhov kawg ntawm hluav taws xob tiv thaiv welded thiab tsis siv neeg arc welded steel rhawv zeb ntau dua 350mm nyob sab nraud lub cheeb yuav tsum ± 0.5%.

Phab Ntsa Thickness kam Zam^a)

Kev sib faib	Rau Seamless Tus Hlau Tube		Rau lwm yam tshaj li Seamless steel raj		Siv tau faib
Kev sib faib	Phab Ntsa Thickness	Kev kam ntawm phab ntsa tuab	Phab Ntsa Thickness	Kev kam ntawm phab ntsa tuab	Siv tau faib
Hoob 1	Hauv 4 hli	{{0 {}} hli, -0.5mm	Hauv 4 hli	{{0 {}} hli, -0.5mm	Thov thaum tsis muaj kev tshwj xeeb. Siv tau rau kub -} tiav cov kauj siv seamless tiav.
	4mm lossis tshaj	+15%, -12.5%	4mm lossis tshaj rau thiab muab tshem tawm . 12 hli	+15%, -12.5%
	4mm lossis tshaj	+15%, -12.5%	12 hli lossis tshaj	+15%, -1.5mm
Hoob 2	Hauv 3 hli	± 0.3mm	Hauv 3 hli	± 0.3mm	Thov thaum muaj kev qhia tshwj xeeb. Tsis muaj feem xyuam rau kub -} tsau cov steelless cov leeg.
	3 hli lossis tshaj	±10%	3 hli lossis tshaj rau thiab tshem tawm . 12 hli	±10%
	3 hli lossis tshaj	±10%	12 hli lossis tshaj	+10%, - 1.2 hli
Sau ntawv	^a)Lub thev rau ntawm phab ntsa tuab ntawm cov leeg ntawm 1016.0 hli nyob rau sab nraud lub cheeb tsam lub taub yuav pom zoo ntawm cov khw thiab tus neeg yuav khoom.

Kev Soj Ntsuam & Tshuaj Xyuas

Tensile xeem, khoov kuaj, mob siab rau kev kuaj, hilostatic qhov kev kuaj.
Tsis - kev sim tshuaj ntsuam (ndt)Rau Weld Kev Nyab Xeeb (yog ERW).

Cov Ntawv Thov

Lub hom phiaj qauv txheej txheem: Qhov zoo tagnrho rau kev siv hauv kev tsim kho, txuas hniav, thiab lwm yam kev thov lwm yam uas muaj zog thiab kav ntev.

Nplua: Haum rau cov ntawv thov xws li scaffolding, txhawb nqa, thiab pawg.

Kev ua tsev: Siv rau hauv archectural cov ntsiab uas yuav tsum muaj lub zog siab thiab kev thov kom zoo nkauj.

Kev tsim khoom lag luam dav dav: Siv tau nyob rau hauv ntau hom kev ua engineering uas cov hlau ua kom zoo nkauj rau nws tus nqi - ua tau zoo thiab lub zog.

Tag

JIS G3444 STK490 yog ib qho ntau thiab siab- zoo carbon hlau yeeb nkab cov qauv kev lag luam. Nws cov tshuaj lom neeg sib luag thiab cov khoom siv zoo dua ua kom nws haum rau ntau cov ntawv thov hauv kev tsim kho, engineering, thiab architecture.

WELDED STEEL PIPE