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i did it alredy crome  and Chrome plated is a dangerous thing and one must take extreme care its very hard To machine i use metal nickel  Not coper nickel aloy acétate What are the uses of Nickel?
Nickel has been a favored component of coins because it is bright and takes a fine polish and because it is lighter than copper, silver and other metals commonly used in coin currency. In 1850, Switzerland became the first modern nation to officially employ nickel in its coinage. The U.S. soon followed suit in the 1850s and ’60s when it introduced nickel to its penny and five-cent pieces to make them lighter. Though the U.S. five-cent coin only contained 25 percent nickel, it quickly became known as “the nickel.” The first pure nickel coin was issued by Switzerland in 1881; Austria and Hungary followed suit in 1893.



Because nickel does not easily oxidize, or rust, the metal was adapted as an electroplating material in the 1850s. Electroplating is a process in which metal ions in a chemical solution are attracted to a solid metal electrode. As the ions bind to the surface of the metal they form a uniform, thin coating. Electroplating a metal surface with nickel can form a layer that protects against corrosion. As the electrochemistry of nickel became better understood, it was adapted for use in batteries. Today nickel and cadmium compounds are used to produce rechargeable nickel-cadmium (Ni-Cd) batteries.

By far the largest use of nickel today is in the steel industry, which uses approximately two-thirds of the world’s annually produced nickel. The metal has the unusual properties of being hard — strong, able to withstand breaking under high forces — and ductile — able to yield or bend before breaking or cracking. In addition, nickel is chemically similar to iron but with particularly good resistance to oxidation. Because of its similarity to iron, nickel can readily substitute for iron in steel alloys or mixtures. The addition of nickel to steel increases its strength, ductility, its rust resistance and its value.

So-called stainless steels, which contain chromium and between 5 and 25 percent nickel,