... 65, A516 Gr 55, HIC, ASTM, steel plate. 1. Boiler & Pressure Vessel Steel Plates (S)A516 Grade 55, (S)A516 Grade 60 ... Grade 65, (S)A515 Grade 70 A 516/A 516M Pressure Vessel Plates, Carbon Steel, for Moderate-and Lower-Temperature Service A ... 515/A 515M Pressure Vessel Plates, Carbon Steel, for Intermediate- and Higher-Temperature Service 2 ...