... annealed or QT. Properties :Cr-Ni-Mo alloyed hot work tool steel with high temperature impact toughness and thermal fatigue strength, ... forging dies up to largest dimensions, tools for tube and rod extrusion such as rams, bolsters, mandrels, plungers, sleeves, die ... pile drivers, hot punching tools, very hard cold work dies and punches, hot shear blades, blocks for dies, forging saddles, pressing ...