CARPENTER H-9 DOUBLE HEADER DIE STEEL was developed specifically to solve chipping, splitting, spalling and cracking in cold header die applications. All billets are acid disc inspected to ensure center soundness and they are tested for hardenability. This datasheet provides information on composition, physical properties, hardness, and tensile properties. It also includes information on forming, heat treating, and machining. Filing Code: TS-449. Producer or source: Carpenter.