The Lloyds Register, LR, specifications identify the requirements for normal strength, higher strength, and high strength quenched and tempered steels used in the construction and repair of ships and other marine structures.
LR AH/DH/EH 32
LR Grade AH27S
LR A/B/D/E
LR Grade 360 FG
LR Grade 460 FG
LR Grade 490 FG