Alloy steel, tseem hu ua alloy steel yeeb nkab, yog hais txog cov hlau carbon alloy uas muaj cov ntaub ntawv uas tsis yog carbon thiab hlau ntxiv rau cov ntsiab lus alloy, thiab qhov tsim nyog ntawm ib lossis ntau lub ntsiab lus alloy yog ntxiv rau ntawm cov pa roj carbon zoo tib yam. Raws li cov khoom sib txawv ntxiv thiab cov txheej txheem tsim nyog, lub zog siab, siab tawv, hnav tsis kam, corrosion kuj, tsis kub tsis kam, kub tsis kam, tsis muaj hlau nplaum thiab lwm yam khoom tshwj xeeb tuaj yeem tau txais. Alloy steel muaj keeb kwm ntawm ntau tshaj 100 xyoo. Alloy steel tau dav siv hauv kev lag luam nyob rau hauv lub thib ob ib nrab ntawm lub xyoo pua puv 19.
Cov ntsiab lus tseem ceeb ntawm cov hlau alloy yog silicon, manganese, chromium, npib tsib xee, molybdenum, tungsten, vanadium, titanium, niobium, zirconium, cobalt, txhuas, tooj liab, boron, tsis tshua muaj ntiaj teb, thiab lwm yam.
Ntawm lawv, vanadium, titanium, niobium, zirconium, thiab lwm yam yog cov muaj zog carbide tsim cov ntsiab lus hauv cov hlau. Tsuav muaj cov pa roj carbon txaus, lawv tuaj yeem tsim lawv tus kheej carbides nyob rau hauv cov xwm txheej tsim nyog. Thaum tsis muaj cov pa roj carbon monoxide lossis nyob rau hauv qhov kub thiab txias, lawv nkag mus rau hauv cov khoom ua kua atoms; Manganese, chromium, tungsten thiab molybdenum yog carbide tsim cov ntsiab lus, ib feem ntawm cov khoom nkag mus rau hauv cov khoom siv hauv lub xeev atomic, thiab lwm qhov yog hloov cov alloy cementite; Aluminium, tooj liab, npib tsib xee, cobalt, silicon, thiab lwm yam yog cov ntsiab lus uas tsis tsim carbides thiab feem ntau muaj nyob rau hauv cov khoom tov hauv lub xeev atomic.
