Though usually a supporting player in Warner Bros' A pictures, Barton MacLane was permitted an occasional leading role in the studio's B-picture product. Man of Iron casts MacLane as a blue-collar factory worker who, through hard work and initiative, is promoted to vice president. Unfortunately, the higher he climbs up the corporate ladder, the more capitalistic and autocratic he becomes. After losing the confidence of his old friends, MacLane is forced to try to win it back during a factory strike. Mary Astor and Dorothy Peterson provide a welcome dose of femininity to the all-male proceedings.