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Gariiradaha birta ee Madow ee Annealed
Qabow duuban gariiradda madow ee annealed (CRBA), oo sidoo kale loo yaqaan "Blue Steel".CRBA waa agariiradda birta duuban qabowkuwaas oo oksaydhsaydhed by annealing in rakibo gaar ah si ay u soo saaraan lakabka magnetite aad u khafiif ah (Fe304) oogada sare (in ka yar 1 μm dhumucdiisuna) ilaalinta dheeraad ah.