Qhov txawv ntawm qhov loj ntawm SC thiab DN ntawm galvanized steel yeeb nkab:

1.SC feem ntau yog hais txog cov welded steel yeeb nkab, hom lus STEEL CONDUIT, yog ib qho luv luv rau cov khoom siv.

2. DN yog hais txog lub nominal txoj kab uas hla ntawm galvanized steel yeeb nkab, uas yog cov yeeb nkab txoj kab uas hla qhia cov yeeb nkab.

3. Galvanized steel kav tau muab faib ua cov kav dej txias-galvanized steel thiab kub-dip galvanized steel kav.Cov kav dej txias-galvanized steel tau raug txwv, thiab tom kawg tau raug txhawb los ntawm lub xeev rau kev siv ib ntus.Nyob rau xyoo 1960 thiab 1970, cov teb chaws tsim kho hauv ntiaj teb tau pib tsim cov kav dej tshiab thiab txwv cov kav dej galvanized.Lub Tsev Haujlwm Saib Xyuas Kev Tsim Kho thiab lwm plaub lub chaw haujlwm thiab cov thawj coj kuj tau tshaj tawm cov ntaub ntawv qhia meej tias cov yeeb nkab galvanized yuav raug txwv tsis pub ua cov kav dej los ntawm 2000. Cov yeeb nkab galvanized tsis tshua muaj siv hauv cov kav dej txias ntawm thaj chaw nyob tshiab.Cov kav dej kub hauv qee cov zej zog siv cov kav dej galvanized.Kub-dip galvanized steel kav yog siv dav hauv kev tiv thaiv hluav taws, hluav taws xob hluav taws xob thiab kev loj.
Cov ntaub ntawv nthuav dav:

Kev ua haujlwm cuam tshuam

(1) Cov pa roj carbon;Qhov siab dua cov ntsiab lus carbon, qhov siab dua qhov hardness ntawm cov hlau, tab sis qhov phem nws cov plasticity thiab toughness.

(2) Sulfur;nws yog ib qho teeb meem impurity nyob rau hauv steel.Thaum cov hlau uas muaj cov ntsiab lus sulfur siab yog raug rau kev ua haujlwm siab ntawm qhov kub thiab txias, nws yooj yim rau brittleness thiab feem ntau hu ua kub brittleness.

(3) Phosphorus;tuaj yeem txo cov plasticity thiab toughness ntawm steel, tshwj xeeb tshaj yog nyob rau hauv qis kub, qhov tshwm sim no hu ua txias brittleness.Hauv cov hlau zoo, leej faj thiab phosphorus yuav tsum tau tswj nruj me ntsis.Txawm li cas los xij, los ntawm lwm qhov kev pom, kev suav nrog ntau dua sulfur thiab phosphorus hauv cov pa roj carbon tsawg tuaj yeem ua rau nws yooj yim los txiav, uas yog qhov zoo los txhim kho kev ua haujlwm ntawm cov hlau.

(4) Manganese;tuaj yeem txhim kho lub zog ntawm cov hlau, tuaj yeem ua kom tsis muaj zog thiab tshem tawm cov kev tsis zoo ntawm cov sulfur, thiab tuaj yeem txhim kho cov hardenability ntawm steel.High alloy steel (siab manganese steel) nrog siab manganese cov ntsiab lus muaj qhov hnav tsis kam.Thiab lwm yam khoom siv lub cev.

(5) Silicon;Nws tuaj yeem ua rau cov tawv tawv ntawm cov hlau, tab sis cov plasticity thiab toughness txo.Cov hlau siv hauv hluav taws xob engineering muaj qee qhov nyiaj ntawm silicon, uas tuaj yeem txhim kho cov khoom sib nqus mos.

(6) Tungsten;tuaj yeem txhim kho cov tawv tawv liab thiab lub zog kub ntawm cov hlau, thiab tuaj yeem txhim kho qhov hnav tsis kam ntawm cov hlau.

(7) Chromium;tuaj yeem txhim kho lub hardenability thiab hnav tsis kam ntawm cov hlau, thiab tuaj yeem txhim kho corrosion thiab oxidation tsis kam ntawm hlau.

Rau kev tiv thaiv corrosion, dav dav hlau kav (dub kav) yog galvanized.Galvanized steel kav yog muab faib ua kub-dip galvanizing thiab hluav taws xob steel zinc.Qhov kub-dip galvanizing galvanized txheej yog tuab, thiab tus nqi ntawm electro-galvanizing yog tsawg, yog li muaj galvanized steel yeeb nkab.