Steelmark

The "Steelmark" logo, originated by U.S. Steel and now a trademark of the American Iron and Steel Institute, is used to promote the steel industry. The logo of the Pittsburgh Steelers is based on the Steelmark.

The Steelmark is a logo representing steel and the steel industry owned by the American Iron and Steel Institute, and used by it to promote the product and its manufacturers.

The logo was incorporated as the emblem of the Pittsburgh Steelers and Huachipato, the first initially using the same design as the Steelmark, but later modified to include the team's full name.