Kuv paub hais tias marine siab-zog steel daim hlau yog siv rau vuam -16Mn vim zoo Mn elasticity, siab zog thiab ua haujlwm vuam zoo. Muaj 16/1000 carbon thiab 1/1000 manganese.
Cov hlau phaj ib txwm, uas yog, Q235 phaj lossis lub qub txheej txheem A3 phaj, muaj 15/1000 lossis tsawg dua carbon thiab tsis muaj manganese.
Tus so ntawm cov khoom muaj pes tsawg leeg tsuas yog hlau (Fe), qhov sib txawv ntawm ob yog tias tom kawg tsis muaj Mn thiab ib qho me me ntawm cov pa roj carbon.
