ASTM A387 Grade 5 Class 2 Steel Plate Traders,Suppliers,Stockists,Exporters Introduction:- ASTM A387 Grade 5 Class 2 Steel Plate ASTM A387 Grade 5 Class 2 steel plate is a high-quality alloy steel plate primarily used in pressure vessel and boiler applications where elevated temperature service is required. This grade is alloyed with chromium