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Plastic Mold Steels



  • Welding
    Superior mold quality after welding. Low hardness of heat affected zone eases post-weld cutting and grinding operations and minimizes mold distortion, etch unevenness, and differences in luster upon mirror finishing. Unique composition eliminates weld cracking.
  • Machining
    Rough machines up to 50% faster than P20 (30% overall) to a superior surface with negligible dimensional change. Use of PX5 assures the longest cutting tool life of any 30 HRc, P20-type material. Consistent hardness and microstructure allow dependable, unattended machining.
  • EDM
    EDM surface hardness is about 70% of that produced by typical P20-type steels. Post EDM grinding and polishing operations are simpler and more consistent, and problems such as surface layer cracking or peeling are reduced.
  • Stability
    Uniform hardness and refined grain structure assure the highest level of dimensional stability (after machining) of any P20-type mold steel.
  • Surface Enhancements
    Can be ion-nitrided to produce a surface hardness over 60 HRc with negligible distortion or dimensional change.
  • Texturing and Polishing
    Uniform microstructure and hardness give PX5 the best surface-finish characteristics of any P20-type material. Low chemical segregation eliminates the occurrence of photo etch unevenness.
  • Toughness
    Exceptional toughness reduces cracking problems in molds

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. PX5 is a registered trademark of International Mold Steel, Inc. and Daido Steel Limited.




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  International Mold Steel, Inc. 
1155 Victory Place
Hebron, KY 41048 USA 
Tel: 859.342.6000
Fax: 859.342.6006
Sales E-mail: [email protected]
Literature E-mail: [email protected]