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Our History

 From a humble beginning, SIW grew its business with great confidence around the world
which brought much success and recognition to the SIW brand globally. 

The Siam Industrial Wire Company Limited or SIW was officially established in Saraburi Province on 6 October 1994 as a spinoff of the wire business of the Siam Cement Group.

In 1996, the company relocated to Rayong province and the employees of the SCG wire business were transferred to SIW. In 2002, NatSteel of Singapore became the major shareholder of SIW in partnership with the Siam Cement Group. In 2008, SIW became apart of the Tata Steel Global Wires Business to create synergies amongst all the wires business units around the world which are part of the Tata Steel Group.

In 2012, SIW diversified into a new galvanized wire business through the joint venture with Nichia Steel Works of Japan to establish TSN Wires.,