Deoxidized steel yog cov hlau uas muaj qee qhov lossis tag nrho cov pa tawm ntawm cov yaj thaum lub sijhawm ua cov txheej txheem steel. Molten steel muaj cov pa oxygen yaj tom qab hloov los ntawm cov hlau molten, tab sis cov solubility ntawm oxygen hauv steel txo nrog cua txias. Raws li cov hlau txias, cov pa ntau dhau tuaj yeem ua rau cov pores lossis precipitate FeO. Qhov no ua rau cov hlau huv dua, zoo dua qub nrog cov hnab ntim cua tsawg dua thiab suav nrog. Deoxidized steel, tuaj yeem muab faib ua plaub hom: tua steel, semi-tua steel, rimmed steel, thiab capped steel.
General tua steel muaj xws li hlau alloy, stainless hlau, thiab kub-resistant steel. Cov hlau uas muaj cov ntsiab lus carbon ntau dua 0.25%, steels siv rau forgings, structural steels nrog cov ntsiab lus carbon ntawm 0.15 thiab 0.25%, thiab qee cov hlau tshwj xeeb hauv qhov qis carbon ntau yam.Nws kuj yog siv rau tej steel castings.
Cov hlau tua tau muaj cov tshuaj lom neeg muaj pes tsawg leeg thiab cov khoom zoo dua li cov hlau semi-tua thiab ntug. Cov hlau raug tua feem ntau nyuaj dua li cov ntug hlau rau cov ntsiab lus carbon thiab manganese. Qhov tsis zoo ntawm cov hlau tua yog tias lawv feem ntau pom cov raj sib sib zog nqus.
ASTM A106, Standard Specification rau Carbon Steel Yeeb Nkab Ua los ntawm Killed Steel rau Kev Siv Kub Kub. ASTM A106 Qib B tso cai rau cov pa roj carbon ntau dua thiab manganese cov ntsiab lus ASTM A106 Qib A. ASTM A333, qhov tshwj xeeb no suav nrog seamless thiab welded carbon thiab alloy steel yeeb nkab rau kev pabcuam cryogenic, hu ua carbon steel tua.
