Suspension springs live in one of the harshest environments on a vehicle — constant load cycling, road salt, moisture, and temperature swings, for the life of the car. Getting the material and finish combination right is what separates a spring that lasts from one that doesn't.
MATERIAL CHOICES FOR SUSPENSION APPLICATIONS
- Oil-tempered steel. The standard choice for high-stress suspension applications, offering the fatigue strength needed for constant load cycling.
- Heavy-gauge wire capability. Suspension springs typically require larger wire diameters — our SHA Series large coilers cover 1.2mm to 30.0mm, the range most suspension applications fall within.
FINISH CHOICES THAT SURVIVE THE ROAD
- Geomet / DACROMET coatings. High-performance corrosion protection widely used in automotive applications, without the hydrogen embrittlement risk associated with some electroplating processes on high-strength steel.
- Shot peening. Introduces beneficial compressive surface stress that meaningfully extends fatigue life under constant road-load cycling.
- Standard zinc/phosphate options. Available for less demanding applications where full Geomet/DACROMET-level protection isn't required.
WHY THIS MATTERS
A suspension spring that fails early doesn't just mean a warranty claim — it means a safety-relevant component underperforming in the field. Specifying the right material and finish combination upfront, rather than defaulting to standard zinc plating, is what keeps a suspension spring performing for the vehicle's full service life.
Send us your drawings, specifications, or automotive program requirements and our engineering team — backed by 20+ years of IATF 16949-certified spring and component manufacturing — will get back to you with a competitive quote and realistic turnaround.
Email: sales@seyunda.com
Phone: +65 9168 2618
We look forward to supporting your next automotive program.
Published by the Seyunda Team · 2026