Dhaqan ahaan, waxaa jira qalabyo kala duwan oo la xaqiijiyay oo loogu talagalay soo saarista baararka dharbaaxada. Kuwaas waxaa ka mid ah birta manganese, birta leh qaab-dhismeedka martensitic (oo loo tixraacayo kuwa soo socda sida birta martensitic), birta chrome iyo Composites Metal Matrix Composites (MMC, egceramic), oo ay ku jiraan biraha kala duwan ...
Sii akhri