4340 (AMS6414)

Our range of 4340 deep-hardening steel bars offers excellent ductility with high strength.

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4340 alloy finds use in deep-hardened constructional steel applications, particularly in the production of highly stressed parts. 4340 offers remarkable ductility and toughness at a variety of strength levels and at elevated temperatures too. The alloy often finds use in engineering applications due to its strength and hardenability, which other carbon steel grades do not provide. With good fatigue strength, Alloy 4340 also resists embrittlement due to the materials excellent ductility. Machinability of the alloy is good using traditional methods, and fusion and resistance welding are possible.

Commercial Applications

Our 4340 steel bars find use in the production of aircraft landing gear, axles, spindles, bearing components and heavy-duty shafts. The product provides a superior combination of strength and malleability.

Stock Availability

We stock 4340 steel bars in various sizes and conditions (including annealed, hardened, normalised and tempered conditions).

Product Features:

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