MIL-S-7420B (NOTICE-3), MILITARY SPECIFICATION: STEEL BARS, ALLOY, CHROMIUM, HIGH CARBON E52100 (AIRCRAFT QUALITY) (11-SEP-2002) [S/S BY SAE-AMS6440, SAE-AMS6444 AND SAE-AMS6447]

MIL-S-7420B (NOTICE-3), MILITARY SPECIFICATION: STEEL BARS, ALLOY, CHROMIUM, HIGH CARBON E52100 (AIRCRAFT QUALITY) (11-SEP-2002) [S/S BY SAE-AMS6440, SAE-AMS6444 AND SAE-AMS6447]., MIL-S-7420B, dated 28 February 1958, is hereby canceled. Future acquisition for this material should refer to SAE specifications AMS 6440, “Steel, Bars, Forging, and Tubing 1.45Cr (0.98-1.10C) (SAE 52100) For Bearing Applications” and AMS 6444, “Steel, Bars, Forgings, and tubing 1.45Cr (0.98-1.10C) (SAE 52100) Premium Aircraft-Quality, Consumable Electrode Vacuum Melted” and AMS 6447, “Steel, Bars, Forgings, and Tubing 1.45Cr (0.98-1.10C) (SAE 52100) Electroslag Remelted”.