Abstract ABREX 600 (hardness target of 600 HBW) is one of the Abrex series of abrasion resistant steel plate alloys. Abrex 600 is a standard option. All of the products are maintained at very low impurity levels, making them well suited to welding and forming. This datasheet provides information on composition, physical properties, and hardness as well as fracture toughness. It also includes information on surface qualities as well as forming, machining, and joining. Filing Code: SA-765. Producer or source: Nippon Steel and Sumitomo Metal Corporation.