Compression springs, extension springs and torsion springs are typical C-parts: They are not the focus of the procurement process, but are installed in almost all technical applications. The requirements for the spring design are very versatile and individual. Compressive, tensile
The spring blog
What does the Relaxation with metal springs? This has little to do with a recovery phase of the spring, but describes the unintentional increasing loss of force of the spring with increasing ambient temperature and duration of load. Or what