General | Case Hardening vs Through Hardening | Practical Machinist ...
WEBApr 5, 2017 · Since you're having to resort to "field expedient" tools starting with one of the tougher alloy 10 x 10 key stocks might make life easier. Perhaps the medium carbon at 64,000 PSI might work well. Just pay careful attention to not leaving tool marks that would weaken the part. 1 x 1mm Key Stock Fasteners Grainger Industrial Supply