Steel its tensile strength and make the austenite form of the iron-carbon solution more stable, chromium increases hardness and melting temperature, and vanadium also increases hardness while making it less prone to metal fatigue. To inhibit corrosion, at least 11% chromium is added to steel so that a hard oxide forms on the metal surface; this is known as stainless steel. Tungsten slows the formation of cementite, keeping carbon in the iron matrix and allowing martensite to preferentially form at slower quench rates, resulting in high speed steel. On the other hand, sulfur, nitrogen, and phosphorus are considered contaminants that make
The Stainless Steel Rat Law of Robotics", which featured the Stainless Steel Rat in the setting of Isaac Asimov's "Robot" series. "The Return of the Stainless Steel Rat", a board game inspired by the character, was published by SPI in their magazine "Ares" in the late 1970s. Designed by Greg Costikyan, the game involved the Rat infiltrating a space station under hostile control. Angelina diGriz is a criminal mastermind much like the Rat, only less ethical and more willing to kill. As the Rat's first case for the Special Corps, he tracks Angelina down and ends up falling in love with her. After her