4340 Steel Bar
Chromium-nickel-molybdenum alloy.
Our range of 4340 deep-hardening steel bars offers excellent ductility with high strength.
4340 alloy finds use in deep-hardened constructional steel applications, particularly in producing 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 material's 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 producing 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).
Export Services
Our export team is well-versed in global shipping, whether by land, sea, or air, ensuring your international orders are handled with utmost care and efficiency.
Discover
- AMS 6414
- AMS 6415
- AMS 6484
- AMS-S-5000, MIL-S-5000
- ASTM A304
- ASTM A322
- BMS 7-28 (Boeing)
- UNS G43400
- Bearing components
- Axles
- Landing gear
- Heavy-duty shafts
- Excellent ductility
- High strength
- Good hardenability
- Virtually immune to embrittlement
