the little blue light balls are likely chromium. My guess is it's 4140, possibly 1050-1060...all are lower carbon steels used for cutting tools like that. Before messing with it much I would try to heat treat it. Get it hot and quench it in mineral oil. If it will skate a file then anneal and have some fun with it. If a file will still bite then it won't get hard enough to make a knife, unless you plan to is it as layer for a Damascus with a high carbon cutting edge.