Making spring there are many kinds of material, when the choice also need according to the spring application scope, the use of temperature, tolerance, using sullair, process performance, material sources and prices and so on a variety of reasons.
When selecting a material, also need to use the standards prescribed by the state to choose. For small and medium-sized products, mainly spiral extension spring, need to choose through strengthening processing of steel wire, lead bath temperature, such as steel and oil quenching tempering steel wire pull, has a very good strength and surface quality, fatigue performance is far higher than generally tempered steel wire, stable performance and easy processing. Carbon spring steel wire cable and piano wire after cold drawing can produce very big residual stress, after processing spring, ?

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