Am wondering if anyone can tell me what type of steel bed frame angle is made of? I have some pieces of it that I had left over from a couple portable treestands that I built years ago. I got thinking about how hard of a time I had drilling it and even cutting it with cutting wheel on my angle grinder. So I dcided to cut small piece off and heat treat it to see if it would harden. To my surprise it hardened extremely hard so I decided to make a blade.[/URL][/] After I had knife and handle finished and etched with muriatic acid, I did final sharpening with my new lansky sharpening system to 25° and for the first time I stroped it with a piece of veg tanned leather I epoxied to board and put green polishing compound on. After that was done I tested the durability and sharpness of the edge by slicing alot of heavy cardboard and did paper slice which sliced perfectly with just the weight of knife and no effort at, it then shaved hair off my arm just like a straight razor.