Sorry, another "What metal is best" thread

[MWF FEED]

I want to make a few more toolholders as shown. 25 x 36 x 69 size and extremely hard. I have a set of Japanese Hardness Tester files, bought from Japan but through ebay(?) and none of them will mark the existing holders. Does that mean the hardness is >RC65 or that the files are carp! HRS is the only steel readily available locally so, being low carbon, would that limit me to case hardening only for the new ones?

Image2.jpg (http://metalworkforums.com/attachment.php?attachmentid=377070&d=1543008721)Image3.jpg (http://metalworkforums.com/attachment.php?attachmentid=377071&d=1543008808)Image1.jpg (http://metalworkforums.com/attachment.php?attachmentid=377072&d=1543008840)

As before, suggestions would be appreciated. Thanks

Charles
Attached Images

http://metalworkforums.com/images/attach/jpg.gif Image1.jpg (http://metalworkforums.com/attachment.php?attachmentid=377072&d=1543008840) (254.7 KB)
http://metalworkforums.com/images/attach/jpg.gif Image2.jpg (http://metalworkforums.com/attachment.php?attachmentid=377070&d=1543008721) (256.4 KB)
http://metalworkforums.com/images/attach/jpg.gif Image3.jpg (http://metalworkforums.com/attachment.php?attachmentid=377071&d=1543008808) (256.4 KB)




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