Alloy Steel yog hlau uas tau sib xws nrog ntau yam ntawm cov ntsiab lus hauv 1.0% thiab 50% los ntawm qhov hnyav los txhim kho nws cov khoom siv. Alloy cov hlau tawg tau tawg rau ob pawg: cov hlau qis thiab cov hlau loj. Qhov sib txawv ntawm ob yog kev sib cav. Smith thiab Hashemi txhais tau qhov sib txawv ntawm 4.0%, thaum degarmo, li al., Txhais tau nws ntawm 8.0%. [1] Feem ntau, cov kab lus "alloy steel" yog hais txog tsawg-alloy steels.