Piv nrog cov pa roj carbon steel, cov cuab yeej hlau alloy steel muaj ntau yam zoo, xws li: zoo hardening zog, zoo hnav tsis kam, siab cuam tshuam lub zog, zoo toughness, tsis yooj yim rau overheat. Hauv kev kho cua sov, silicon uas muaj cov cuab yeej steel hauv decarburization yog qhov hnyav, nws nyuaj rau ua tiav qhov yuav tsum tau muaj hardness ntawm cov hlau.
