In 1990, Nippon Steel Thai Sumilox (Thailand) Co., Ltd. was established as the local supplier in Thailand, managed directly by Sumitomo Metal Industries Co., Ltd. In order to process and supply electrical steel sheets "Sumilox". With consistent and direct technical support by Sumitomo Metal Industries Co., Ltd., we supply electrical steel sheets for metal core of motors and transformers.

When we relocated to our present location, Rojana Industrial Park in Ayutthaya, in August 2000, we increased one slitting machine to two machines. Furthermore, we installed a large 300-ton press machine in November 2001. Therefore we can meet customers’ requirements in regard to slitting electrical steel sheets and pressing, and stacking motor and transformer cores.