Standard Specification for Pressure Vessel Plates, Carbon Steel, for Moderate- and Lower-Temperature Service

1.1 This specification covers carbon steel plates intended primarily for service in welded pressure vessels where improved notch toughness is important. 1.2 Plates under this specification are available in four grades This specification covers carbon steel plates intended primarily for service in welded pressure vessels where improved notch toughness is important. According to different strength levels, the plates are available in four grades: Grades 55, 60, 65, and