There are several types of stainless steel-FERRITIC, MARTENSITIC, AUSTENITIC and DUPLEX.
Ferritic Steel
The ferritic steel are magnetic, have a low carbon contain chromium as the main alloying element, typically at the 13% and 17% levels.
Martensitic Steel
The martensitic steel are magnetic, contaning typically 12% chromium and a moderate carbon content.They are hardenable by quenching and tempering like plain carbon steels and find their main application in cutlery manufacture, aerospace and general engineering.
Austenitic Steel
The austenitic steels are non-magnetic and, in addition to chromium typically at the 18% level, contain nickel, which increases their corrosion resistance.They are the most widely used group of stainless steel.
Duplex Steel
Duplex steels are used where combinations of higher strength and corrosion resistance are needed.
Super Austenitic
Super austenitic grades and precipitation hardened grades of steel are also available.
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