SAE AMS6421J
SAE AMS6421J Steel, Bars, Forgings, Mechanical Tubing and Forging Stock, 0.80Cr - 0.85Ni - 0.20Mo - 0.003B (0.35 - 0.40C) (Modified 98B37), Aircraft Quality
standard bySAE International , 09/12/2025
standard bySAE International , 09/12/2025