Tension spring (also called torsion spring, tension spring for short) is the spiral spring under axial tension, [extension spring are generally made of material with circular cross section. When not under load, tensile spring between the circle and circle are generally no clearance and tight.
It is suitable for high and low temperature, corrosion resistance and other working conditions. The materials mainly include stainless steel spring wire, carbon steel wire, oil quenching tempering alloy spring wire, high-temperature alloy spring wire, etc.
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