API SPEC 2Y pdf download Specification for Steel Plates, Quenched-and-Tempered, for Offshore Structures 1 Scope1.1cOVERAGE This specification covers two grades of high strength steel plate for use in welded construction of offshore structures, inselected critical portions which must resist impact, plastic fatigue loading, and lamellar tearing.Grade 50 is covered inthicknesses up to 6 in.(150 mm) inclusive, and Grade 60 is...