alloy steel , die steel , special steel,h13ï,¼,? cr12ï,¼,? cr12mov , cr12mo1v1ï,¼,?o1ï,¼,?m2, gcr15, 40cr, 42crmo, 20crnimo

steel, 440csteel, 4340, 4120, 4130, 8620, scm415, sacm645, suj2, sus420j2, sncm220, 42crmo, 20crnimo, 40crnimoa, 9cr18mov