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How to Harden Mild Steel? (Impossible!)
So they say it's impossible to harden mild steel. Well, here's how to do it... (hint: start with "mild" steel that isn't really "mild" steel.) Tip: When grinding metal ALWAYS use a good filter/respirator to protect your lungs from particles. Here's a link to the model I ordered from Amazon: http://amzn.to/2DBfpAk (Disclaimer: I have an…
