Providing Stainless for Human Progress

Lert Siam is one of the Stainless leading integrated company and conducts business worldwide. Our success is driven by our people and their commitment to get results the right way—by operating responsibly, executing with excellence, applying innovative technologies and capturing new opportunities for growth. We are involved in virtually every facet of the Stainless industry. We explore for, 304 and 316L transform to the market and distribute transportation over Thailand. Lert Siam provides efficiency solutions; and develops the resources for the future, including research and development for advanced technology.

Company Roots

We trace our beginnings on 30th December 1978 by Mr.Lertrit and Mrs.Suwanna Wongdeelertsakul, which led to the formation of the Stainless Industry. That company later became Lert Siam Steel Export and Import Co., Ltd. subsequently, Lert Siam Steel Co., Ltd. We took on the name Lert Siam when we growth well in the market.

Global Scope

Our diverse and highly skilled global suppliers consist of approximately 20 countries which Lert Siam imports Stainless as Outokumpu-Finland, Nippon Yakin-Japan, HongKong, Posco-Korea, Taiwan, Indonesia etc.


Our marketing network supports retail outlets over 76 cities in Thailand from the North-the South and the East-the West. There are all our customers everywhere.

Technology and Emerging Stainless

Technology is propelling our growth. We're focusing on technologies that improve our chances of finding, developing Stainless Steel.


We also are investing in the development of emerging Stainless technologies, such as finding better ways to preserve food and beverage on production line, integrating longer use of fishing industry and cold storage into our operations and expanding our renewable Stainless resources.

Environment and Safety

As a company and as individuals, we take great pride in contributing to the communities where we live and work. We also care about the environment and are proud of the many ways in which our employees work to safeguard it.


Our persistent efforts to improve on our safe work environment continue to pay off. Lert Siam achieved significant levels of safety as measured in days-away-from-work ratings in both Upstream and Downstream operations.

Our Work

We recognize that the world needs all the Stainless we can develop, in every potential form. That's why our employees work daily to find newer, cleaner ways to powering the world

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