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Mild steel CANNOT be hardened to 61HRC, if you think that, you are a fool. mild steel is made for structural applications. I seriously doubt your rifle barrels were made from mild steel. mild steel is also only heat treatable by carbeurizing, which requires specialized machinery. just because steel is called "high carbon" steel does not mean it is a good steel. your lack of knowledge makes me question your claim of being a lifelong metal worker.
mild steel is NOT hardenable. mild steel is not hardenable through heat. it has to be professionally hardened through carbuerizing. furthermore, mild steel is used for structural applications, and is NOT an adequate steel for knives. just because it has carbon does not mean it works for knives. mild steel is MUCH too brittle, and despite its brittleness, it will not hold an edge.
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Nice plagiarism you used there. You should really put those words in quotations, and give the site you took them from some credit. http://comicvine.gamespot.com/repulsor-beam/4055-55700/It doesn't really sound like your writing style...
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