33Mncrb5 39Mncrb6 Alloy Steel Plate

Alloy steel plate is stronger than conventional carbon steel. It is measured by its thickness in inches. Boiler and Pressure Vessel Steel Coil / Sheet / Plate ASTM A387 Steel Plates: A387 Gr 2 Cl 1, A387 Gr 5 Cl 1, A387 Gr 9 Cl 1, A387 Gr 11 Cl 1, A387 Gr 12 Cl 1, A387 Gr 21 Cl 1, A387 Gr 21L Cl 1, A387 Gr 22 Cl 1, A387 Gr 22L Cl 1, A387 Gr 2 Cl 2, A387 Gr 5 Cl 2, A387 Gr 9 Cl 2, A387 Gr 11 Cl 2, A387 Gr 12 Cl 2, A387 Gr 21 Cl 2, A387 Gr 22 Cl 2, A387 Gr 91 Cl 2 ASTM A387 steel plates are chromium-molybdenum alloy steel plates intended primarily for welded boilers and pressure vessels designed for elevated temperature service. Each A387 grade except Grades 21L, 22L, and 91 is available in two classes of tensile strength levels. Grades 21L and 22L are available only as Class 1