NEW STEEL ALERT: The steel companies we purchase from at my shop have been heavilly advertising a new steel called DC53. It is a Japanese steel that is supposed to be a direct replacement for D2 and can replace M2 in certain circumstances. It is supposed to be as wear resistant as D2, but it can be hardened higher to achieve greater strength and has a finer grain structure than D2. Sounds like it would make an interesting knife steel.