E4340 rod has high fatigue strength and maintains its hardness and strength qualities even at high temperatures. Excellent for use in highly stressed parts. Meets AMS2032 and is furnished normalized and tempered cold finished.
The fatigue-tensile ratio makes it ideal for highly stressed parts such as landing gear legs, and is often referred to as “spring steel”. Tensile strength is about 110,000 PSI. It is difficult to weld but can be welded by any of the common welding processes providing the section is preheated and stress relieved after welding.
Metals and Plastics - Steel - E-4340
