Nickel plating is a versatile process that satisfies a wide range of needs. Depending on the process and conditions, nickel can be deposited as a soft or hard finish, ranging from 150-500 Vickers. The color ranges from a bright finish similar to stainless steel in color, to a dull grey or light grey (almost white) color. Corrosion resistance is a function of thickness. Nickel also has a low coefficient of thermal expansion and is magnetic. All steel parts having a hardness of Rc-40 or greater require a post bake 375 25F for 3 hours.