Coiling Technologies is known for our large spring manufacturing capabilities; however, we also produce small springs as well. For example, this small torsion spring is a critical component in a flight control system for a missile application. The spring is produced out of MP35N alloy. It is a multiphase super alloy that was developed in the 1960's during the “Space Race”. MP35N needs to be work hardened along with aging at 1200 ? F (650 ? C) for 4 hours to achieve its highest tensile strength properties which can be as high as 300 Ksi (2070 MPa). Its high strength properties post aging allows the engineer to design a torsion spring that can provide very high torque values within a small package. By producing the material with a square wire, one can achieve an even higher force capacity vs. a more conventional round wire application.

MP35N is primarily comprised of Nickel, Cobalt, Chromium, and Molybdenum. Therefore, it can operate in high temperatures up to 700 ? F (370 ? C) very effectively and still provide nearly 85% of its room temperature tensile strength value. The alloy also has excellent corrosion resistance, and it is widely used in the energy sector. The material can be aged at a higher temperature to achieve higher levels of hydrogen embrittlement resistance; however, the material tensile strength will drop approximately 15% at room temperatures vs. the more conventional aging temperatures. One can reference NACE MR0175 or API 20F for the corresponding ageing temperatures which are appropriate for your specific application
requirements.

If you have a spring application that requires high strength, corrosion resistance or elevated temperature operation look no further than Coiling Technologies to be able to fabricate the appropriate energy storage solution. You can learn more here.