ASTM A 230/A 230M - 05 Standard Specification for Steel Wire, Oil-Tempered Carbon Valve Spring Quality

American Society for Testing and Materials (ASTM). Current edition approved March 1, 2005. Published March 2005. Originally approved in 1939. Last previous edition approved in 1999 as A 230/A 230M – 99. 4 p. This specification covers the highest quality of round carbon steel spring wire, uniform in quality and temper, intended especially for the manufacture of valve springs and other springs requiring high-fatigue properties.