In theory, as density is 19.1g/cm3, which is approximately 70% denser than lead, uranium could be used as material of making fake coin.

However, tungsten alloy jewelry is weakly radioactive and not as dense as gold, but usually works as gold substitution, so it does not appear to be a practical method.

Then people have discovered that tungsten is environmental-friendly, durable and hardness, the most important is that its density of 19.25g/cm3 is just about the same density as gold (19.3g/cm3), which bears the similar specific gravity. These advantages make tungsten alloy jewelry enjoys the superiority to be the best substitute for the costly metal oftungsten alloy jewelry gold or platinum.

It is necessary to tell that tungsten gold-plated would not work for several reasons but a coin with a tungsten center and gold all around tungsten alloy jewelry could not be detected as counterfeit by density measurement alone.


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Tungsten is a rare metal, is also an important strategic material, and in ancient times was known as the "tungsten heavy alloy". 1783 Spanish named Deep Air Asia. The tungsten content in the earth's crust is 0.001%. There are about 20 minerals containing tungsten found until now. Tungsten deposits in general along with the activity and the formation of granitic magma. After smelting tungsten is silver-white lustrous and hard metal with high melting point.

Tungsten, also known as Wolfram, lapis ponderosas or heavy stone, has highest melting point of all elements except carbon - sources in scientific literature vary between 3387°C and 3422°C. Tungsten heavy alloy also has also excellent high temperature mechanical properties and the lowest expansion coefficient of all metals. A temperature of about 5700°C is needed to bring tungsten to boil which corresponds approximately to the temperature of the sun's surface. With a density of 19.25 g/cm3, tungsten is also among the heaviest metals. Its electrical conductivity at 0°C is about 28% of that of silver which itself has the highest conductivity of all metals.

The metal is known as tungsten in some countries and as wolfram in others, including Sweden, the country of origin of the name tungsten. The chemical symbol W, which is universally used to denote tungsten, suggests that wolfram was formerly the more generally accepted name for the element. In Britain, the mineral wolframite is also known as wolfram.

Since 1912, Tungsten heavy alloy (the element or, perhaps, an uncle) has been widely used to make the most essential part of any light bulb–the filament. Bumpers have tungsten heavy alloy with tungsten content of 3000 to 6000 one hundred watt light bulbs, depending on model and configuration.

During World War II, tungsten played a significant role in background political dealings. Portugal, as the main European source of the element, was put under pressure from both sides, because of its deposits of wolframite ore at Panasqueira. Tungsten's resistance to high temperatures and its strengthening of alloys made it an important raw material for the arms industry.


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Before welding techniques and bolted joints were developed, metal framed buildings and structures such as the Eiffel Tower, Shukhov Tower and the Sydney Harbor Bridge were generally held together by riveting. Also automobile chassis were riveted. Riveting is still widely used in applications where light weight and high strength are critical, such as in an aircraft. Many sheet-metal alloys are preferably not welded as deformation and modification of material properties can occur. Common but more exotic uses of rivets are to reinforce jeans and to produce the distinctive sound of a sizzle cymbal.

When the rivet is cherry red, place the cavity of the air tool over the end of the rivet and turn on the tool. This works great and is much quicker than a bucking bar. If necessary you can heat and re do with the air tool. The finished job should look like the factory rivets or better and should be stronger than if the assembly were bolted together. This is not the easiest project in restoring an automobile but can be mastered with patience and common sense.


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1. Small volume

High density make tungsten alloy fishing sinkers/weights smaller than the conventional lead fishing weights. It will be hung up far less with a tungsten sinker than with a lead sinker because of its smaller size.

2. Hard

It's harder than lead fishing weight. It will not be stuck in the jowl of the fish. So the shape will be maintained longer.

3. Strong wind resistance

As the high density of tungsten, the tungsten alloy fishing sinker makes your fishing easier. It is extremely sensitive and can actually help you “feel” what the bottom is made of and what your bait is bumping into, such as brush, rocks, mud, etc.

Tungsten fishing weights/eyes are an ideal, environment-friendly alternative to lead weights, which are toxic and increasingly being labeled an environmental hazard.


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