Tungsten Military Parts Price

Detecting Fake Gold Coins

Details: Category: Tungsten Information; Published on Wednesday, 13 November 2013 11:13; Written by Cher; Hits: 699

Gold buyers, collectors and sellers could end up wasting their money buying a fake gold coin, unless they have the tools and knowledge to test whether or not a coin is genuine. You don't have to be an expert to tell the difference between a real gold coin and a fake as long as you have the right tools to measure it and a reference book to check those measurements against.

1.Hold a magnet over the coin you are testing. If the coin sticks to the magnet, it has traces of steel or some other metallic metal in it meaning it is forged or plated and not solid gold.

2.Place the coin on a scale and record the exact weight. Look up the official weight of the coin in a reference book or on a reputable website. If the coin is more than a hundredth of a gram lighter or heavier, than the coin is suspect.

3.Measure the exact diameter of the coin with a caliper and compare that to the diameter listed in the reference book. If the diameter is off, even by a little, than the coin could be a counterfeit.

4.Examine the coin's surface more closely with a loupe. Look for any bubbles, depressions or scoring marks that indicate the coin was crudely made. A soapy film on the surface can also be a sign the coin is fake. Also check the date and mint mark against the ones listed in the reference book.

5.Drop the coin and listen to the sound it makes when it hits a hard surface. Gold coins have a distinct ringing sound, while fakes do not.

6.Using tongs, carefully drop the coin in a beaker of nitric acid. If the coin is pure gold, it will not react with the acid. However, if there are any base metals in the gold than those metals will dissolve. They will appear to be bubbling up as they corrode in the acid.

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How to Make Fake Gold From Nickels

Details: Category: Tungsten Information; Published on Wednesday, 13 November 2013 11:09; Written by Cher; Hits: 736

Making fake gold coins from nickels is a fun project. With a few simple steps, you can change a lowly nickel into shiny gold coin. You can fool a person for a moment, until that person realizes that Jefferson's face graces the coin

1.Select an ovenproof bowl for the project of making a nickel into gold. Fill it with water.

2.Measure 1 tablespoon of sodium hydroxide and add it into the water. Add 1 tablespoon per nickel you wish to turn into gold. Be careful not to let the sodium hydroxide touch your skin.

3.Add 1/3 tablespoon of zinc to the water and sodium hydroxide and stir.

4.Set a nickel into the ovenproof bowl, and place it into a heated oven until the water boils. Remove the bowl when the nickel changes color. Pour the water from the bowl, and put the nickel on a plate.

5.Take the nickel from the bowl, and hold it to the flame in the burner with a set of tongs. Your nickel will change to a lovely "gold" coin with Jefferson's face on its face.

Gold plated Tungsten Product Manufacturer & Supplier: Chinatungsten Online - http://paper-weight.cn/
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Military Tungsten Alloy Swaging Rod & S-125

Details: Category: Tungsten Information; Published on Tuesday, 12 November 2013 18:24; Hits: 676

Military tungsten alloy swaging rod is made of tungsten alloy rod through calcinations. The normal method used in the processing are extruding, forging and sintering. After calcinations, tungsten alloy swaging rod has higher ductility, toughness and tensile strength than tungsten alloy rod, so it can be used for a longer time. Military tungsten alloy swaging rod can be used for S-125.

The S-125 Neva/Pechora Soviet surface-to-air missile system was designed by Aleksei Mihailovich Isaev to complement the S-25 and S-75. It has a shorter effective range and lower engagement altitude than either of its predecessors and also flies slower, but due to its two-stage design it is more effective against more maneuverable targets. It is also able to engage lower flying targets than the previous systems, and being more modern it is much more resistant to ECM than the S-75. The 5V24 (V-600) missiles reach around Mach 3 to 3.5 in flight, both stages powered by solid fuel rocket motors. The S-125, like the S-75, uses radio command guidance. The naval version of this system has the NATO reporting name SA-N-1 Goa and original designation M-1 Volna (Russian Волна – wave).

With military tungsten alloy swaging rod, S-125 can destroy aircrafts effectively, for its high density, excellent hardness and superior ultimate tensile strength.

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Gold And Molybdenum Shares Market Distance

Details: Category: Tungsten Information; Published on Wednesday, 13 November 2013 11:06; Hits: 709

Gold and Molybdenum shares market distance.

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Military Tungsten Alloy Swaging Rod & S-75

Details: Category: Tungsten Information; Published on Tuesday, 12 November 2013 18:03; Hits: 701

Military tungsten alloy swaging rod is made of tungsten alloy rod through calcinations. The normal method used in the processing are extruding, forging and sintering. After calcinations, tungsten alloy swaging rod has higher ductility, toughness and tensile strength than tungsten alloy rod, so it can be used for a longer time. Military tungsten alloy swaging rod can be used for S-75.

The S-75 Dvina is a Soviet-designed, high-altitude air defense system, built around a command guided surface-to-air missile. Since its first deployment in 1957 it has become the most widely deployed air defense system in history. It scored the first destruction of an enemy aircraft by a surface-to-air missile, shooting down a Taiwanese Martin RB-57D Canberra over China, on October 7, 1959, hitting it with three V-750 (1D) missiles at an altitude of 20 km (65,600 ft). The success was attributed to Chinese fighters at the time in order to keep the S-75 program secret.

With military tungsten alloy swaging rod, S-75 can destroy aircrafts effectively, for its high density, excellent hardness and superior ultimate tensile strength.

Tungsten Heavy Alloy Manufacturer & Supplier: Chinatungsten Online - http://www.tungsten-alloy.com
Tel.: 86 592 5129696; Fax: 86 592 5129797
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