FINELINE and FINELINE DOUBLE-O FIVE plate steels are carbon and alloy steel grades produced to 0.010 and 0.005% maximum sulfur levels. They have improved through-thickness ductility with resultant reduction in the possibility of lamellar tearing in fabricated structures. While data herein refer specifically to ASTM A633C plate the improved product lines are applicable to a wide range of plate steels. This datasheet provides information on composition, physical properties, elasticity, and tensile properties as well as fracture toughness. It also includes information on forming, heat treating, machining, and joining. Filing Code: SA-429. Producer or source: Lukens Steel Company.