Ib hom khoom siv uas siv ntau cov hlau phaj yog muab faib ua cov pa roj carbon tsawg tsawg thiab cov hlau tshwj xeeb, nrog rau cov hlau tsis tshua muaj zog thiab corrosion-resistant thiab kub-resistant multi-layer steel daim hlau.Ordinary low-carbon steel daim hlau tau muab faib ua ob hom: txias-dov thiab kub-dov.Cold-dov steel phaj muaj qhov zoo ntawm qhov zoo thiab qhov tseeb thickness qhov ntev.Lawv feem ntau yog siv los ua lub cev tsheb.Kub-dov daim hlau feem ntau yog siv los ua lub tsheb ncej thiab lwm yam.
