Corus at night - photo taken before the plant was mothballed
SSI, or Sahaviriya Steel Industries Public Company Limited, were established in 1990 as Thailand's first manufacturer of hot-rolled steel sheet in coils.
Their aim is to develop an integrated value-added steel sheet industry in Thailand.
They describe themselves as "pioneers" of Thailand's steel industry and aim spread their wings further.
In August 2010, they signed a MoU to buy the TCP Redcar site from Corus.
Who are they?
SSI are based in Thailand where they aim to develop a sheet steel industry, and according to their website they now want to become the leading steel sheet producer for the whole of Southeast Asia.
They work by self imposed rules for quality-of-life enhancement, environmental conservation and social responsibilities.
According to their website, their mission is to provide high-quality steel sheet products and services that offer the utmost satisfaction to their customers while caring for their communities, society, and the environment.
What are they offering?
They've signed a MoU (memorandum of understanding) offering to buy Teesside's Corus steel plant, which was mothballed earlier this year.
The deal worth £320m is being discussed, and could lead to a "significant" number of jobs being created in addition to the existing workforce of over 700.
SSI president Win Viriyaprapaikit said: "We have great respect for the tradition of steelmaking on Teesside and for the highly skilled Teesside workforce, having previously purchased slab from Teesside Cast Products."