Testing Reports

As a professional flat coil springs manufacturer since 2002, we carry out the full & strict quality control policy.

Our quality control runs through the entire manufacturing process from raw material importing to the shipment.

some testing reports are showed as below, if you need some special reports, please direct inquiry to our sales representative: sales@yshspirng.com

Tension Testing Report

Tension Testing Report


Salty Spray Testing Report


Import Raw Material Inspection Report


Fatigue Testing Report