Bohler-Uddeholm N690 ISOEXTRA Knife Steel
Composition Analysis Graph, Equivalents And Overview

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N690 ISOEXTRA(Bohler-Uddeholm) - Bohler-Uddeholm steel, recommended working hardness 58-60HRC. Similar to VG-10. Later, Aichi produced pretty much identical(with N690), ZA-18 steel, promoted to be better a performer than VG-10. ISOEXTRA signifies ESR technology used in making of this steel.

Manufacturing Technology - ESR

Country - Sweden(SE)

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