Descripción Delta Steel processes and distributes carbon and alloy plates, structural products such as bars, pipe and tubing. The company's annual production is in the range of 1.3 million tons of steel. Though it concentrates its operations on the southwestern US, Delta does export its steel products to Mexico, Puerto Rico, and parts of South America. It also has agreements with trading companies that give it access to Asian markets. Subsidiary Smith Pipe & Steel has locations in Arizona. Delta Steel is owned by Reliance Steel and Aluminum.