API 5L Grade X65 Pipe Chemical Composition and …
Steel grade (Steel name) Mass fraction, based upon heat and product analyses % C Mn P S max max max max PSL 1 pipe with t ≤ 25.0 mm (0.984 in) Seamless pipe ... API 5L X65 PSL 2 pipe X65Q X65M minimum maximum minimum maximum 450 (65 300) 600 (87 000) 535 (77 600) 760 (110 200)