Blue Steel or blue steel may refer to: Science, technology and engineering Blue steel, a tempering color of steel Bluing (steel), a process in which steel is partially protected against rust Martensite, a crystalline form of steel , a black oxide that may form when iron is heated Blue Steel (missile), a British Cold War nuclear missile Film Blue Steel (1934 film), 1934 western starring John Wayne R.O.T.O.R., a 1987 science fiction/action film also known as Blue Steel Blue Steel (1990 film), American action thriller film directed by Kathryn Bigelow Blue Steel Pose, Derek Zoolander's trademark look in Zoolander and Zoolander 2 Other uses Blue Steel guitar strings, made by Dean Markley Strings Tar Heel Blue Steel, a basketball team See also Steel blue, a shade of blue that resembles blue steel Blue Stahli, a Detroit, Michigan-based electronic rock project (Stahl is a Germanic root word for steel) Arpeggio of Blue Steel, a 2014 manga and anime series Marking blue, a dye used in metalworking to aid in marking out rough parts for further machining Engineer's blue, for the purposes of layout or flattening, respectively, which is also referred to as bluing