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4340/4340V UNS G43400

4340 is a heat treatable, low alloy steel containing nickel, chromium and molybdenum. It is known for its toughness and capability for high strength in the heat treated condition while retaining good fatigue strength. Typical applications for structural use are aircraft landing gear, power transmission gears, shafts and other structural parts.

AMS 6359Steel Plate, Sheet, Strip and Coil.
AMS 6409Steel Bars, Forgings, and Tubing, Special Aircraft Quality Cleanliness.
AMS 6414Steel Bars and Forgings, Vacuum Arc Re-Melted
AMS 6415Steel Bars and Forgings.
AMS 6454Steel Sheet, Strip, and Plate. Vacuum Arc Re-Melted.
AMS 6484Steel Bars and Forgings. Normalized and Tempered
BMS7-28Steel Bars and Forgings. Aircraft Quality.
DMS 1555Steel Bars and Forgings. Aircraft Quality.
MIL-S-5000Steel Bars and Forgings.