Yongsheng’s Quality Assurance

Quality is the cornerstone of Yongsheng company development, we’re all about quality without compromise.


Yongsheng’s quality control starts from the concept stage when our customer starts to get in touch.

when you contact our sales and tell the requirement or application, we will give you some suggestions or solutions based on our years’ experience, which will save your time and cost greatly.


After confirming the order and before the product, The standard production quality control process be started at the same time. it covers raw material appearance inspecting, hardness testing, raw material reports, etc.

During the manufacturing stage, our quality control staff will regularly inspect the springs’ dimension, color, tension, torsion, fatigue, salt spray testing, etc. each step will be rigorously performed, take a glance at our detailed quality control.

                           lifetime-testing tension-testing torsion-testing

Before shipment, your springs will be checked whether they are packed well, and carton size, appearance, mark all should be well done.

Certificates got from authority

                  ISO9001 certificate SGS certificate

ROHS testing reports download