For penknives the steel is tempered at 470 degrees, for table knives at 530 degrees, and for saws at 560 degrees.
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https://paperspast.natlib.govt.nz/newspapers/LT19110306.2.10
Bibliographic details
Lyttelton Times, Volume CXXII, Issue 15557, 6 March 1911, Page 3
Word Count
21Untitled Lyttelton Times, Volume CXXII, Issue 15557, 6 March 1911, Page 3
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