Most compression spring failures come down to a handful of avoidable causes — fatigue, overstress, corrosion, buckling, and the wrong material. This guide explains why springs fail and how to design and specify them so they don’t.
A compression spring that fails in the field is rarely “bad luck.” In almost every case, the failure traces back to a design, material, or manufacturing decision that could have been caught earlier. After 20 years of manufacturing and troubleshooting springs, here are the failure modes we see most often — and how to prevent each one.
What it is: The most common failure in dynamic springs. Repeated loading and unloading eventually cracks the wire — usually starting at the surface — until it breaks, often well before anyone expects.
Why it happens: Stress amplitude too high for the material, too many cycles, surface defects, or the wrong material for the duty cycle.
How to prevent it:
What it is: The spring permanently shortens or loses load — it “takes a set.” It still works, but no longer delivers the specified force.
Why it happens: The spring is compressed beyond the material’s elastic limit, or operates at too high a stress even without going solid.
How to prevent it:
What it is: Rust or chemical attack weakens the wire, creating pits that become fatigue-crack starting points, or thinning the wire until it fails.
Why it happens: Wrong material for the environment — carbon steel in humid, wet, or chemical conditions.
How to prevent it:
What it is: A tall, slender spring bows sideways under load instead of compressing straight, causing uneven loading and early failure.
Why it happens: The free length is too large relative to the diameter (a high slenderness ratio).
How to prevent it:
What it is: The spring simply isn’t made of the right material for the job — leading to fatigue, set, or corrosion failures that trace back to the initial specification.
Why it happens: Material chosen on cost or habit rather than the real operating conditions.
How to prevent it:
What it is: Inconsistent wire diameter, incorrect coil geometry, poor end grinding, or variation between batches causing unpredictable performance.
How to prevent it:
Most spring failures are designed out, not manufactured out. The best time to catch a fatigue, stress, or material problem is during design review — before a single spring is made.
If you have a spring that’s failing, or a demanding new application, our engineers can review the design, identify the failure mode, and recommend the right material, finish, and geometry.
GL Springs (Shanghai Guanglei Spring Co., Ltd.) is an IATF 16949–certified custom spring manufacturer in Shanghai, China, producing precision compression, torsion, and extension springs for OEMs worldwide since 2005, with in-house engineering and 100% inspection.
