Wonilsa does its best to provide the customers with high quality copper and copper alloys





Wonilsa Co., Ltd. has acquired the KS Mark and the ISO 9001:2000 certificates.

Korean Industrial Standards Association
We acquired the KS Mark for our "copper and copper alloy plates and strips(Standard No.: KS D 5201)" in October 1998. Since then, all products of ours have born the proud mark.

Certification Center for Medium and Small-sized Businesses
In 2001, Wonilsa was recognized for its international quality assurance system since it acquired the ISO 9001:2000 quality assurance system certification for "the production service of copper and copper alloy plates and strips." Wonilsa enhanced greatly the reliability of its products and the company's trustworthiness.

For various customers' satisfaction and to meet their demands, we carry out more strict quality management than "KS" Standards. The following table shows our in-house hardness standards for copper and copper alloys which are more rigid than "KS" Standards.

In-house Hardness(HV) Standards