I was given around a dozen of these PR Diamond Asphalt cutting blades and would like to use them for knife making stock. Each blade measures just under 18" in diameter and are .125" thick. I called the company and they told me they were high speed tool steel with molybdenum but didn't have any more information than that. Would these blades be a good material for making knifes? Anything I should consider or processes I need to consider? Thanks for the time.