GUTERL D-7 is a high-carbon, high-chromium, high-vanadium tool and die steel. It is air hardening and therefore offers an extremely high degree of dimensional stability in heat treatment. In the hardened condition it has extremely high resistance to abrasion and wear. Its many applications include blanking and cold-drawing dies, punches, burnishing tools, slitter knives and gages. This datasheet provides information on composition, physical properties, and hardness. It also includes information on heat treating and machining. Filing Code: TS-361. Producer or source: Guterl Special Steel Corporation.