Search results
Results from the WOW.Com Content Network
Ninety-one (91) zolotniks have the equivalent millesimal fineness of 947[9]. Thus, the alloy contains 94.79% pure silver and 5.21% copper or other metals. [4] [5] Sterling silver has a millesimal fineness of 925. The sterling silver alloy is 92.5% pure silver and 7.5% copper or other metals.
Skip to main content. Subscriptions; Animals
For example, copper is added to the precious metal silver to make a more durable alloy for use in coins, housewares and jewelry. Coin silver, which was used for making silver coins in the past, contains 900 ‰ silver and 100 ‰ copper, by mass. Sterling silver contains 925 ‰ silver and 75 ‰ of other metals, usually copper, by mass.
Fine silver, which is 99.9% pure silver, is relatively soft, so silver is usually alloyed with copper to increase its hardness and strength.Sterling silver is prone to tarnishing, [1] and elements other than copper can be used in alloys to reduce tarnishing, as well as casting porosity and firescale.
All sources I know are in agreement that copper makes the silver harder and more durable, (just like when copper is alloyed with gold). Must be a prob with the German article. --mervyn 12:50, 14 April 2006 (UTC) This is an old thread, but just wanted to reiterate: copper is added to silver specifically to increase its durability/ hardness.
According to the Federal Reserve, 30% of all U.S. adults said they incurred at least some debt for their education. Borrowers owe a collective $1.77 trillion in student loan debt, including ...
As the price of copper rises, these companies typically see higher revenues and improved profit margins, which can lead to increased stock prices and potentially higher dividends for shareholders.
Cupronickel or copper–nickel (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 nickel–copper alloy that contains a minimum of 52 percent nickel.)