It is a nod to the American Institute of Iron and Steel.
The Steelers logo is based on the Steelmark logo belonging to the American Iron and Steel Institute (AISI).The logo's meaning was extended to include the three materials used to produce steel: yellow for coal, orange for ore and blue for steel scrap.
The Steelers use the Steelmark logo which belongs to the American Iron and Steel Institute. Instead of the word (Steel) inside the logo, it was changed to (Steelers).The colors represent the materials used to make steel:Yellow for coalOrange for oreBlue for steel scrap
The Steelers logo has three colored astroids, a hypocycloid with four cusps, (yellow, red and blue) and the name Steelers written in black to the left of them. It is encased in a gray ringed, circular white background.
See related link to Pittsburgh Steelers official website.
The Steelers logo is based on the Steelmark logo belonging to the American Iron and Steel Institute (AISI).
The team was called the Pirates (just like Pittsburgh's baseball team) from the time it was founded in 1933 until 1940. In 1940, the team held a contest for a new name. The winning entry was for the name "Steelers," reflecting Pittburgh's history as the nation's top steel-producing city. The team's logo on its helmet is the "Steelmark" logo created by U.S. Steel for the American Iron and Steel Institute. The only change is that the Steelers' logo changes the word "Steel" to "Steelers". This logo has been on the team's helmet since 1962.
The Steeler"s Logo is 3 four point stars. The three stars are red, yellow, and blue. They are placed on a white background with the word Steelers to the left of the stars.
American Iron & Steel Institute
In 1962, the Steelers equipment manager Jack Hart applied the logo to the helmet (at that time the helmets were a solid gold color) and the Steelers were uncertain how it would look. So he applied them to the right side only. Later on, even after changing the helmet color to black, they left the logo on the right side only, due to the teams new found success & uniqueness of the logo. The Steelers are now the only team with a logo on only one side of the helmet.
The Pittsburgh Steelers sometimes have a black wave on their merchandise, but I couldn't find a specific company with a black wave for a logo.
hypocycloids
412 is the area code of Pittsburgh, Pennsylvania.