Alloy Steel phaj zoo dua li cov thawv hlau hlau. Vim li cas? ASTM A 387 Qib 12 Alloy Steel Sheet tau yooj yim dua rau cov kev kho cua sov thiab cov kev kho tshuab. Lawv yog tsim ntawm chromium, molybdenum, manganese, silicon, thiab ntau dua, ua rau lawv muaj zog dua, nyuaj, kub ua kom sov, thiab weldable.