Vuam uayog ib hom kev siv hlau uas siv tau los koom nrog ntau hom khoom siv hlau. Thaum xaiv cov ntaub ntawv uas tuaj yeem welded, cov khoom xws li cov khoom siv tshuaj muaj pes tsawg leeg, melting point, thiab thermal conductivity yuav tsum tau xav txog. Cov ntaub ntawv uas tuaj yeem welded muaj xws li carbon steel, galvanized steel, stainless hlau, txhuas thiab tooj liab.

Cov pa roj carbon steel yog cov khoom siv vuam zoo uas muaj kev sib txuas zoo thiab lub zog, ua rau nws tsim nyog rau ntau daim ntawv thov kev lag luam. Galvanized steel feem ntau yog siv rau kev tiv thaiv corrosion thiab nws cov weldability nyob ntawm qhov tuab thiab zoo ntawm txheej galvanized. Stainless hlau muaj corrosion kuj thiab yog haum rau ib puag ncig uas yuav tsum tau corrosion kuj, tab sis vuam stainless hlau yuav tsum tau tshwj xeebcov txheej txheem vuamthiab cov ntaub ntawv. Aluminium yog lub teeb yuag hlau nrog zoo thermal thiab hluav taws xob conductivity, tab sis vuam aluminium yuav tsum tau tshwj xeeb vuam txoj kev thiab cov ntaub ntawv alloy. Tooj liab muaj hluav taws xob zoo thiab thermal conductivity thiab haum rau hluav taws xob thiab tshav kub pauv chaw, tab sis vuam tooj liab yuav tsum xav txog cov teeb meem oxidation.

Thaum xaiv cov khoom siv vuam, cov yam ntxwv ntawm cov khoom siv, kev thov ib puag ncig thiab cov txheej txheem vuam yuav tsum raug txiav txim siab los xyuas kom meej qhov zoo thiab kev ua tau zoo ntawm kev sib txuas welded. Vuam yog txheej txheem nyuaj uas yuav tsum tau ua tib zoo xav txog kev xaiv cov khoom siv, cov txheej txheem vuam thiab cov txheej txheem ua haujlwm kom ntseeg tau qhov zoo thiab kev ntseeg siab ntawm qhov kawg welded sib koom ua ke.