Specifications

all springs with the diameter 0.1~16mm are cold coiled, they are widely use in many industries. such as the hardware, and car, machine, tools~~~~~.

the springs with the diameter 0.1~12mm, it can choose the spring steel 60Si2MnA. Carbon steel, ,55CrSi.

with the diameter 12~16mm, it's better to choose the material 60Si2MnA or 55CrsI.