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SAE AMS6431 Revision N, May 1, 2012
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Steel, Bars, Forgings, and Tubing 1.05Cr - 0.55Ni - 1.0Mo - 0.11V (0.45 - 0.50C) (D6AC) Vacuum Consumable Electrode Remelted.
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AIA/NAS Aerospace Standards

This specification covers a premium aircraft-quality, low-alloy steel in the form of bars, forgings, mechanical tubing, and forging stock.


These products have been used typically for ultra-high-strength structural applications requiring a through-hardening weldable steel for use up to 600 °F (316 °C), but usage is not limited to such applications.