Steelmark

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.

[1] The original figures were most likely constructed with the help of French curves and a bit of artistic license, as the logo was designed decades before computer-aided graphics came into common use.

A yellow figure is located at the top of the design, orange to the right and blue on the bottom, with the word "Steel" on the left side.

"Chuck" Iglehart and unveiled in January 1960, with AISI president Benjamin F. Fairless proclaiming that the campaign marked "the first time that steel has been merchandised industry-wide at the consumer level".

[3] In the original 1960 announcement of the program, the three hypocycloids were said to represent "the modernity, lightness and stylishness" of consumer products made of American steel.