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How To Heat Treat: CPM S35VN

How To Heat Treat: CPM S35VN

Heat treating S35VN can be done at different levels of complexity. The below is the "ultimate" version from knifsteelnerd.com:

  • hold at 2025 F for 15 mins (1107 C)
  • plate quench
  • liquid nitrogen/cryo treatment for 30+ mins
  • temper between 300 - 400 F for 2 hours x 2 (149 C - 204 C)
  • (adjust temp for hardness, aim for 60 HRC as a starting point)

A simpler heat treatment recipe that is proven to work but provide a slightly lower HRC:

  • hold at 1950 F for 15 mins (1065 C)
  • quench in oil
  • temper at 400 F (204 C) for 2 hours x 2 for 57-58 HRC
25th Jan 2021 Bjorn J

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