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HOME --> RUBBER MOLD STEELS --> NAK55 --> UNIQUE CHARACTERISTICS

Rubber Mold Steels

NAK55

Unique Characteristics:

  • Vacuum-Arc Remelt manufacturing process.
  • 40 HRc hardness.
  • Uniform hardness throughout, even in heavy sections.
  • When welded, NAK leaves no witness lines after re-aging. Uniform grain structure with no pin holes, inclusions or hard spots.
  • Machines up to 50% faster than 30 HRc P20 mold steels.
  • Never needs stress relieving, even after heavy machining.


NAK55 mold inserts. Photo courtesy of Tooling Express, Inc.


All technical and engineering data and suggested procedures, specifications and applications contained in this publication are for general information only. Daido Steel, International Mold Steel and/or their distributors disclaim any and all express or implied warranties of merchantability, suitability for any particular purpose or use, or freedom from infringement of any patent, trademark or copyright. NAK80 is a registered trademark of International Mold Steel, Inc. and Daido Steel Limited.

NAK55

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Unique Characteristics

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  International Mold Steel, Inc. 
6796 Powerline Drive 
Florence, KY 41042 USA 
Toll Free: 800.625.6653
Tel: 859.342.6000
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