Austenitic, or 300 series, stainless steels make up over 70% of total stainless steel production. they contain a maximum of 0.15% carbon, a minimum of 16% chromium and sufficient nickel and/or manganese to retain an austenitic structure at all temperatures from the cryogenic region to the melting point of the alloy. a typical composition of 18% chromium and 10% nickel, commonly known as 18/10 stainless, is often used inflatware. similarly, 18/0 and 18/8 are also available. superaustenitic stainless steels, such as alloy al-6xn and 254smo, exhibit great resistance to chloride pitting and crevice corrosion due to high molybdenum content (>6%) and nitrogen additions, and the higher nickel content ensures better resistance to stress-corrosion cracking versus the 300 series. the higher alloy content of superaustenitic steels makes them more expensive. other steels can offer similar performance at lower cost and are preferred in certain applications.
the low carbon version