SAE AMS6409C
SAE AMS6409C
Steel, Bars, Forgings, and Tubing 0.80Cr 1.8Ni 0.25Mo (0.38-0.43C) (SAE) 4340) Special Aircraft Quality Cleanliness, Normalized and Temperedstandard by SAE International, 02/01/2007
standard by SAE International, 02/01/2007