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Tenaris traces its roots to the formation of Siderca, the sole Argentine producer of seamless steel pipe products by the predecessor of San Faustin in 1948. Tenaris was organized on December 17, 2001.
In June 2006, the company acquired Maverick Tube for $3.185 billion.
In September 2006, it sold 75% of Dalmine, its Italian energy supply business, to E.ON for €39 million.
In 2007, the company acquired Hydril for $2.16 billion. The pressure control business was sold to GE Oil and Gas in April 2008.
In January 2020, the company acquired IPSCO Tubulars from OAO TMK for $1.2 billion.