410 Stainless Steel
- 410 series
410 Stainless steel is used commonly in liners for folding knives. The advantage to 400 series stainless is that is can be hardened. It is slightly magnetic.
Tip: To harden bring it to non-magnetic temperature and then cool rapidly under a fan. This is really simple with a small piece cut to size and using a small MAP gas torch. Heat it up until a magnet doesn't stick any more and then cool it off. It will pick up 5 or 6RC hardness. Usually, 400 series stainless doesn't get much harder than mid 40's so don't expect it to blade hard. The idea behind this is to give your folder just a little more stiffness.
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