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SAE AMS6439 Revision E, July 1, 2016
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Steel Sheet, Strip, and Plate 1.05Cr - 0.55Ni - 1.0Mo - 0.12V (0.42 - 0.48C) (D6AC) Consumable Electrode Vacuum Melted, Annealed
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AIA/NAS Aerospace Standards

This specification covers a premium-aircraft-quality, low-alloy steel in the form of sheet, strip, and plate.


These products have been typically used for parts that may be welded during fabrication and require through-hardening to high strength levels, for use up to 600 °F (316 °C), but usage is not limited to such applications.