What Controls Spring Fatigue Life: Stress, Surface and Misalignment
Cyclic failure is rarely a material-only problem. Working stress, surface condition, heat treatment and installation all matter.
GONGNENG ENGINEERING
Practical guides covering spring design, materials, processes, fatigue, industry applications and sourcing
All articles35
Page 2 of 4
SUS304 vs SUS316 Springs: “Stainless” Is Not a Complete Environment Spec
Media, chlorides, cleaning, temperature and crevices all change the corrosion risk of stainless springs.
Why Battery Springs Often Use Phosphor Bronze
A battery contact is both a spring and an electrical interface, so material, contact force, surface film and galvanic compatibility must work together.
Spring Finish Guide: Zinc, Nickel, Black Oxide and Passivation
A finish should address corrosion, conductivity, appearance, friction or joining while accounting for dimensions and embrittlement risk.
Hydrogen Embrittlement in Plated High-Strength Springs
Embrittlement may appear as delayed brittle fracture after shipment inspection, so plated high-strength steel requires process review.
How Shot Peening Supports Spring Fatigue Performance
Controlled peening introduces beneficial surface compressive stress, but intensity, coverage and downstream processes must be controlled.
Post-Forming Stress Relief: Why Spring Angles, Size and Load Move
Cold forming leaves residual stress. Stress relief stabilizes the part but also creates predictable dimensional movement.
Repeatable Spring Load Testing: Fixtures, Speed and Presetting
The same spring can read differently under different fixtures and sequences, so the test method belongs with the tolerance.
Spring Dimensional Inspection: A Caliper Reading Is Not Automatically Accurate
Flexible parts change under measuring force, so datum, posture, force and functional gauges control the result.