File:AndrewMatthews case hardengin Facebook 20200401-2.jpg

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The arm after quenching you can see the grey mottled appearance, generally a good sign it has worked well when all the coating has been blown off by the boiling water during quenching. Photo by Andrew Matthews, 1 April 2020.

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current08:06, 1 April 2020Thumbnail for version as of 08:06, 1 April 20202,048 × 1,536 (974 KB)Dnevil (talk | contribs)The arm after polishing on the surface table with some wet and dry. Photo by Andrew Matthews, 1 April 2020.

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