LATROBE E. H. W. No. 1 is a high tungsten, chromium, vanadium hot work steel, having a good combination of toughness and abrasion resistance at high temperatures. This datasheet provides information on composition and hardness as well as fracture toughness. It also includes information on forming, heat treating, and machining. Filing Code: TS-63. Producer or source: Latrobe Steel Company.