AIRDI-150 is an air-hardening high-carbon high-chromium tool and die steel having high resistance to abrasion. It corresponds to AISI Type D2 and ASM Class II D-2. This datasheet provides information on composition, hardness, tensile properties, and compressive strength as well as fracture toughness. It also includes information on forming, heat treating, machining, and joining. Filing Code: TS-49. Producer or source: Crucible Steel Company of America.