Hot-rolled structural sections to support the growing of
the construction industry.

Siam Yamato Steel Co., Ltd. (SYS) was established in 1992 with the objective of producing hot-rolled structural steel, which is a joint venture between

  • Yamato Kogyo Co., Ltd.
  • Mitsui & Co., Ltd.
  • The Siam Cement Public Company Limited
  • Sumitomo Corporation (Thailand) Co., Ltd.
  • Mitsui & Co. (Thailand) Co., Ltd.

Currently, SYS has 2 hot-rolled structural steel mills, operating in Map Ta Phut Industrial Estate and WHA Eastern Industrial Estate (Maptaphut), Rayong province with the total production capacity of 1.1 million tons annually. By using advanced production equipment and technology to produce hot rolled structural steel, which certified by both domestic and international standards, SYS almost fully replaced importation of heavy section steel from overseas, resulting in huge conservation of national currency.

SYS put enduring effort in product development, product inspection as well as quality assurance in order to serve customers with continuously improved service standard.

In addition, our warehouse in Ban Bueng, Chonburi can efficiently facilitate our domestic customers. Altogether including our office in Bangkok,

SYS put enduring effort in developing products and quality assurance system continuously in order to ensure our ability to serve the ever changing requirements of our customers. As a result, SYS has gained recognition and acceptance from both domestic and overseas customers for all these years.

SYS Steel

Product & Service