MIL-S-7420B, MILITARY SPECIFICATION: STEEL BARS, ALLOY, CHROMIUM, HIGH CARBON E52100 (AIRCRAFT QUALITY) (28-FEB-1958) [S/S BY SAE-AMS6440, SAE-AMS6444 AND SAE-AMS6447]

MIL-S-7420B, MILITARY SPECIFICATION: STEEL BARS, ALLOY, CHROMIUM, HIGH CARBON E52100 (AIRCRAFT QUALITY) (28-FEB-1958) [S/S BY SAE-AMS6440, SAE-AMS6444 AND SAE-AMS6447]., This specification covers the requirements for high-carbon chromium alloy steel bars of aircraft quality, for bearing applications.