(Hot Work Tool Steel)

BOHLER W360 Isobloc is a high molybdenum, chromium vanadium hot work tool steel for use in cold work, hot work, plastics, and HPS applications where the highest toughness in the 52-57 HRC range is required. The fact that this grade can obtain this hardness by tempering at temperatures in excess of 900 degrees F makes this grade suitable for applications requiring coatings like PVD and nitriding. It can be used to replace H13 where higher hot hardness is required, as well as grades like S7 where low tempering temperatures limit the use of the steel. With excellent toughness uniformity due to the use of remelting technology, it will also give consistent results in heat treatment and production.


  • Hot and warm forging dies 
  • Core pins and Inserts for die casting dies where erosion is an issue 
  • Toughness critical cold work applications 
  • Extrusion dies 
  • Plastic injection moulds where lower cycle time is a requirement or higher wear resistance is required due to the use of abrasive plastics 
  • Slides and lifters in injection molds 
  • Tooling for high speed presses
Title Type/Filesize Download

Article - W360 ISOBLOC - the premium H13 hot work tool steel of tomorrow

PDF / 59 KB PDF Download

BOHLER W360 ISOBLOC Data Sheet (Revision 05.2013)

PDF / 1048 KB PDF Download

BOHLER W360 ISOBLOC Heat Treatment

PDF / 23 KB PDF Download

BOHLER W360 ISOBLOC Size Programme

PDF / 23 KB PDF Download

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