obviously steel
The metals silver, copper and nickel are elements. It is brass that is an alloy, and copper and zinc are what make it up.
nickel
there are many combinations of brass/copper/zinc. High brass for example has 65% copper and 35% zinc. Nickel brass has 70% copper and 24.5% zinc with 5.5% nickel Prince's has 75% copper and 25% zinc
German nickel or nickel silver is an alloy that contains nickel, zinc and copper. That makes it a type of brass which is an alloy of copper and zinc. Pure nickel is an element, not an alloy.
5 cent coin: Brass-clad nickel 10 cent coin: Brass-clad nickel 50 cent coin: nickel-clad copper dollar coin: nickel-clad copper.
Brass is an alloy of copper and nickel. Bronze is an alloy of copper and tin. Bronze tends to be more brittle.
Brass (copper and zinc), Bronze (copper and Tin) also nickel
Brass is a yellow-colored alloy made from copper and zinc, while nickel is a silver-colored metal with a slight blue tint. Brass tends to have a warmer tone and is less shiny than nickel. You can differentiate between the two by comparing their color, shine, and possibly using a magnet (nickel is magnetic, while brass is not).
Copper cables are the best and the standard just make sure it is sheilded cable.
A 50p coin in the UK is made of cupro-nickel, with 75% copper and 25% nickel. The coin also features a nickel-brass outer ring and a Cupro-nickel inner core.
All US Halves, Quarters, Dimes from 1965 to date are copper-nickel. The Dollar coins from 1971-1999 are also copper-nickel but were switched to manganese-brass in 2000
Cents are made of copper-plated zinc Dollars are made of manganese-brass