American Society for Testing and Materials (ASTM). Current edition approved March 1, 2005. Published March 2005. Originally approved in 1965. Last previous edition approved in 2004 as A 541/A 541M – 04. 6 p. This specification covers requirements for quenched and tempered carbon and alloy steel forgings for pressure vessel components.
All grades are considered weldable under proper conditions. Welding technique is of fundamental importance, and it is presupposed that welding procedure and inspection will be in accordance with approved methods for the grade of material used.