CARPENTER No. 345 is a chromium-molybdenum-tungsten hot work steel for applications which require extreme toughness. It is recommended for aluminum extrusion work, forging dies, die casting dies, forming dies, etc. This datasheet provides information on composition, physical properties, hardness, elasticity, and tensile properties. It also includes information on high temperature performance as well as forming, heat treating, machining, and joining. Filing Code: TS-203. Producer or source: Carpenter.