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What year was nickel first used in coins?
The first official and deliberate use was in 1850, in Switzerland. Nickel was part of the alloy, with other metals such as copper and silver. Ancient coins from Bactria dating back to 200BCE had nickel in their composition (almost in the same proportion as modern day issues) but it was not known to be separate metal in the alloy.
A 1944 Jefferson nickel has an s on the back but what does that mean?
Nickel was needed for the war effort during World War II. In order to meet the needs of the military, nickel was not used for the production of the Jefferson Nickel. Beginning in 1942, the composition of the nickel coin was changed from the original alloy of 75% copper and 25% nickel to a new alloy which consisted of 56% copper, 35% silver and 9% manganese. In order to show which coins had this new alloy the mint mark which had been located just to the right of Monticello [the building on the back of the Jefferson nickel] was moved to a new position just above the building. Additionally, the size of the mint mark was greatly increased. Also, for the first time in the history of the US Mint, the mint at Philadelphia used a mint mark on one of the coins produced there, the letter "P". Denver continued to use the letter "D" and San Francisco continued to use the letter "S". Since the alloy of the nickel was changed during the mintage year, there are 1942 nickels of the former alloy and there are 1942 nickels of the new alloy. In 1946 the composition of the nickel was again changed and the original alloy of 75% copper and 25% nickel was used and continues to be used today.
How much is a 1955 smooth edge quarter worth?
It has a smooth edge because it's worn, not because of a minting error. Silver-alloy coins were softer than modern copper-nickel ones and they wore out a lot faster. That means it's only worth its silver value, about $2.75 as of 10/2009
What is the value of a silver 1937 Indian head nickel?
Please don't assume that because a coin is old it has to be made of silver. Like modern nickels, all buffalo nickels were struck in an alloy of 75% copper and 25% nickel. Please see the question "What is the value of a 1937 US nickel?" for more information.
Did the US produce brass coins?
Except for the current series of $1 coins, no. The closest is the bronze alloy used in cents from 1864 to 1942 and 1944 to 1982. Sacajawea and Presidential dollars are made from a special alloy that's a combination of brass and manganese.
Inventor of a steel making process?
That would be Henry Bessemer, inventor of the Bessemer Converter which allowed the processing of Steel on an industrial scale. The process involves the removal of impurities (an important factor in Steel manufacture) through oxidation.
What is the alloying process?
Here is a link to a description of the alloying process for a generic alloy production method.
What is the most useful alloy in production of ball pens?
tungstencarbide...
How do you weld monel?
Monel Alloy 400 is readily joined by conventional process and procedures, Most of conventional welding process may be used to Join Monel Alloy 400 tto itself or disimilar alloys.
Why is alluminum alloy a suitable material for the production of mountaineering poles?
it is strong and flexible and light also it does not rust
Can alloy be recycled?
Yes, alloys can be recycled. The process involves melting down the alloy to separate and recover the different components. This melted material can then be used to create new alloy products.
Properties of low alloy nickel?
The low alloy nickel such as Cu90/Ni10 and Cu70/Ni30 offer excellent resistance to corrosion in the seawater and biofouling. These are used in the production of coins. Read more about them below:
Friction stir welding of magnesium alloy?
it is type of a non ferrous welding process,
When was stainless steel?
In 1912 Harry Brearley was seeking a corrosion resistant alloy for bun barrels. During this process he subsequently discovered a martensitic stainless steel alloy we use today.
What is the solute of brass?
Modern brass is a alloy of copper and zinc. It is found usually in factories and with pink brass that is uncommon.
When was stainless steel discovered?
In 1912 Harry Brearley was seeking a corrosion resistant alloy for bun barrels. During this process he subsequently discovered a martensitic stainless steel alloy we use today.
What is the material Ni-Cu?
Ni-Cu is a nickel-copper alloy, consisting of nickel and copper as the primary elements. It is commonly used in electronic components, marine applications, and in the production of coins. The addition of copper to nickel improves the alloy's strength and corrosion resistance.
