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OU-31 Steel

This modern Powdered Metallurgy knife steel is made by Nippon Kosuha Steel Co. Ltd. and is distributed by Kyoritsu Kozai Co. Ltd. It is claimed to have a "homogeneous", "fine" and "clean" microstructure, which provides up to three times the toughness of AISI D2 and a hardness equivalent to AISI M2 (HRc. 64).

C 0.90% | Cr 8.50% | Co 3.00%  | Mo 2.00% | V 3.00%