Turning Archive

Subject:
Re: Thanks to all
Response To:
Thanks to all ()

David Walser
Bruce -- I found the following by searching for "Rockwell" on Thompson's website:

"The tools are made from the best steel on the market, CPM10V (A-11) a powder metal manufactured by Crucible Materials Corporations with 10% vanadium content to hold an edge longer and has a proven history in woodturning. The steel is hardened to 62-64 Rockwell, triple tempered with a cryogenic treatment between the first and second temper. The cryogenic treatment at this stage transforms the bulk of the retained austenite to martensite and form very fine “eta” carbides much finer than tempering alone, this increases the durability and toughness of the steel. Nothing else can be done to this steel"

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