Most likely it is 420HC, an appropriate steel for a large blade. Case doesn't say what "Tru-Sharp" is, but it performs like a decent 420HC. Edge holding is similar to Buck's at a similar hardness of around 57 RC. The Case Bowie is a direct descendant of the famous Collins #18 machete issued to Army Air Corps pilots as a survival knife in the late 1930s. It was later issued to Carlson's Raiders in the Pacific in WWII and was called the Marine Raider bowie. These knives are usually used as presentation knives, but even the newer stainless ones are quite useful in the field for machete work and light chopping. The large old-fashioned hand guard does get in the way a bit, but the knife is not just a wall hanger.