West Ham’s proper nickname is The Hammers but West Ham were originally called Thames Ironworks FC or something and that’s where The Irons comes from, not to be confused with The Iron who are Scunthorpe.
Anyway, The Hammers, The Irons – those are all old obsolete nicknames. Think their new nickname for next season is now “The Cheating Bastards” or something like that (no offense Max!).