... Gr 65, A516 Gr 55, HIC, ASTM, steel plate. 1. Boiler & Pressure Vessel Steel Plates (S)A516 Grade 55, (S)A516 ... : ASME, ASTM 4. Dimension of Steel Plate: Thickness-6~150mm; Width-1150~3700mm; Length-3000~18000mm Boiler&Pressure Vessel Steel Plate-AS516Grade70N