... thickness 6-350mm, 1.2379/D2/Cr12Mo1V1 steel,Cold work tool steel,tool steel 1.2379/D2/Cr12Mo1V1 steel,Cold work tool steel,tool steel flat barHot rolled ... , annealed, black surface/peeled/machinedUT:Sep 1921-84 C/c 1.2379 tool steel flat bar with good quality and price