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  2. Cupronickel - Wikipedia

    en.wikipedia.org/wiki/Cupronickel

    Cupronickel or coppernickel (CuNi) is an alloy of copper with nickel, usually along with small quantities of other metals added for strength, such as iron and manganese. The copper content typically varies from 60 to 90 percent. (Monel is a nickelcopper alloy that contains a minimum of 52 percent nickel.)

  3. United States Mint coin sizes - Wikipedia

    en.wikipedia.org/wiki/United_States_Mint_coin_sizes

    Nickel 21.21 mm 5 g 1866–present Nickel 21.21 mm 5 g 1942–1945 Twenty Cent 22 mm 5 g 1875–1878 $5 Half Eagle 21.6 mm 8.36 g 1795–1929 $10 American Gold Eagle 22 mm 7.78 g 1986–present $25 American Platinum Eagle 22 mm 7.78 g 1997–present Half Cent 23.5 mm 6.74 g 1795–1857 Two Cent 23 mm 6.22 g 1864-1873 Quarter (Clad) 24.26 mm 5. ...

  4. Nickel - Wikipedia

    en.wikipedia.org/wiki/Nickel

    The market price of nickel surged throughout 2006 and the early months of 2007; as of April 5, 2007, the metal was trading at US$52,300/tonne or $1.47/oz. [87] The price later fell dramatically; as of September 2017, the metal was trading at $11,000/tonne, or $0.31/oz. [88] During the 2022 Russian invasion of Ukraine, worries about sanctions on ...

  5. Hardnesses of the elements (data page) - Wikipedia

    en.wikipedia.org/wiki/Hardnesses_of_the_elements...

    Download QR code; Print/export Download as PDF; Printable version; In other projects Wikidata item; ... nickel: 4.0: 638: 667–1600: 900–1200 29: Cu:

  6. Quarter (United States coin) - Wikipedia

    en.wikipedia.org/wiki/Quarter_(United_States_coin)

    Its current version is composed of two layers of cupronickel (75% copper, 25% nickel) clad on a core of pure copper. [2] With the cupronickel layers comprising 1/3 of total weight, the coin's overall composition is therefore 8.33% nickel, 91.67% copper. Its weight is 0.1823 troy oz. or 0.2000 avoirdupois oz. (5.670 grams).

  7. Kennedy half dollar mintage figures - Wikipedia

    en.wikipedia.org/wiki/Kennedy_half_dollar...

    In the first year of production the coins were minted in 90% silver and 10% copper (90% silver). From 1965 through 1970, the coins were minted in a clad composition of mostly silver outer layers and a mostly copper inner layer (40% silver). After 1970, the coins are minted in a coppernickel clad composition.

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  9. Indian 5-rupee coin - Wikipedia

    en.wikipedia.org/wiki/Indian_5-rupee_coin

    The 5 rupee Indian coin is minted with cupro-Nickel. The diameter of the coin is 31.1mm. The weight of the coin is 6.74 grams. The shape is circular. [2] India portal; Money portal; Numismatics portal