Extension Springs

Extension Springs are helical springs designed to absorb and store energy by resisting pulling forces. They are manufactured with hooks, loops, or end coils to attach to components, and are widely used in garage doors, trampolines, automotive interiors, machinery, and industrial equipment. Zeron Fasteners produces Extension Springs in stainless steel, carbon steel, and alloy steel grades, ensuring high strength, corrosion resistance, and long operational life.

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Extension Springs

Extension Springs Chemical Composition

Element C Mn Si Cr Ni Mo
Content (%) 0.20 – 0.45 0.30 – 1.20 0.15 – 0.35 16.0 – 18.0 8.0 – 10.5 0.5 – 1.0

Extension Springs Mechanical Properties

Tensile Strength Yield Strength Elongation Hardness
Up to 1500 MPa 850 MPa (min) 8–14% Rockwell C 38-46

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