H Series Insert for Hardened Steel

An H Series insert is a cutting insert designed for ISO H hardened steel machining. It is suitable for hard turning applications involving hardened steels, case-hardened steels, and other high-hardness materials that require high precision, strong wear resistance, and stable dimensional control.

Our H Series inserts are designed for hardened steel applications up to HRC 65. In general, ISO H materials include hardened steels in the range of about 45 to 65 HRC, where heat generation and abrasive wear place much higher demands on insert grade, edge strength, and thermal stability.

Hardened steel is difficult to machine because it generates high cutting heat and causes strong abrasive wear on the cutting edge. Dedicated H Series inserts are designed to provide better edge security, thermal stability, and wear resistance, helping maintain stable accuracy and more predictable tool life in hard turning.

Yes. H Series inserts are well suited for mold and die components, hardened shafts, bearing-related parts, and other precision machining applications where surface finish, dimensional consistency, and repeatable tolerance control are important.

For finishing hardened steel under stable conditions, inserts with strong wear resistance and good edge consistency are usually preferred to maintain surface finish and dimensional accuracy. For semi-interrupted or interrupted hard turning, tougher insert grades with stronger fracture resistance are generally a better choice to improve process security and reduce sudden edge failure.

DOHRE CNC is a professional insert manufacturer providing H Series inserts for hardened steel machining up to HRC 65. We focus on high precision, exceptional wear resistance, optimized edge strength, and thermal stability to support reliable performance in mold and die work, precision machining, and other demanding hard turning applications.