What causes disc springs to crack?
Disc springs crack because of one or more interacting causes: over-compression, unsuitable material, poor heat treatment, surface damage, corrosion fatigue, eccentric loading or inadequate guidance. A failure review should compare the fracture location with working height, stack alignment, environment and cycle history.
Data for engineering review
Send the drawing, dimensions and target load, material, working temperature and media, cycle duty, quantity and any failed-part photos. FeTech Spring will review the application before confirming a design.
The linked video is the original Chinese-language recording. The answer on this page is localized for international readers.
Quick answer
When a spring fails, it is natural to ask whether the material was wrong. Material should be checked, but disc spring failure often comes from the way the spring is loaded, guided, stacked or exposed in service.
Common causes include over-compression, near-flat operation, poor guidance, wrong stacking, high-temperature relaxation, corrosion, cyclic fatigue and abnormal contact surfaces.
Over-compression and near-flat operation
A disc spring is not better simply because it is compressed more. Long-term operation close to flat position can increase stress, fatigue risk, permanent set and load loss.
This is why the working point should be checked against the load curve and the duty cycle, not only against whether the spring fits in the space.
The review data that saves time
Useful information includes dimensions, material, working height, load range, stack method, installation structure, temperature, media, cycle frequency, service time and failure photos.
With those details, FeTech can check whether the issue points toward material, stack arrangement, guidance, heat, corrosion or installation conditions.
Frequently Asked Questions
What are common disc spring failure causes?
Over-compression, poor guidance, wrong stacking, high-temperature relaxation, corrosion, fatigue and abnormal contact conditions are common causes.
Can a disc spring be used after being flattened?
It should be reviewed carefully. Near-flat or flat operation increases stress and permanent set risk.
What information is needed for failure review?
Drawings, samples, load, working height, temperature, media, cycles, assembly structure and failure photos are useful.
Need FeTech to review your disc spring application?
Send the drawing, stack envelope, load target, temperature, media and quantity. Our team can check material direction, stack logic and quotation readiness.
- DIN 2093 replacement or custom geometry
- Valve, flange, actuator and severe-service stacks
- Material review for stainless, Inconel, Hastelloy, titanium or heat-resistant steel
Final geometry, fatigue life, K4 source, friction and support-face conditions still require engineering confirmation.