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Steel, Bars, Forgings, and Mechanical Tubing 0.50Cr - 0.55Ni - 0.20Mo (0.18 - 0.23C) (SAE 8620)
AMS6274S
Steel, Bars, Forgings, and Tubing 4.1Cr - 3.4Ni - 4.2Mo - 1.2V (0.11 - 0.15C) Premium Aircraft-Quality for Bearing Applications Double Vacuum Melted
AMS6278F
Steel Bars, Forgings, and Tubing 1.8Ni - 0.25Mo (0.38 - 0.43C) (4640)
AMS6312K
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