This group contains chromium and nickel and is identified by the Type 300 series. Grades containing chromium, nickel and manganese are Type 200. These two types have different compositions and properties, but many common characteristics. They can be hardened by cold working, but not by heat treatment. In the annealed condition, all are essentially nonmagnetic. They have excellent corrosion resistance and unusually good formability. Type 304 (18% chromium – 8% nickel) and Type 316 (16% chromium – 10% nickel – 2% molybdenum ) are the most widely used grades in this group.