Density of the materials is a key factor in the impact kinetic energy penetrators penetrating force, from the viewpoint of economic feasibility, of heavy metals may be used only depleted uranium penetrator material alloys and tungsten alloys. There are somes differences between depleted uranium alloys and tungsten alloys :

1: Mechanical properties and yield strength. Under quasi-static conditions, the traditional mechanical properties of depleted uranium alloy tungsten alloy is almost equal, and the yield strength of tungsten alloy high 25% to 30% over the depleted uranium alloys.

2: Safety and environmental protection. Depleted uranium is radioactive contamination, which can cause environmental and political issues, with the development of promising more narrow.

3: Adiabatic shear sensitivity. Tungsten alloy with adiabatic shear sensitivity, but the effect is not good depleted uranium alloy, so to improve its "self-sharpening" effect has become a hot spot, you need to intensify research.
 

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Tungsten alloy chemically stable, non-toxic and environmentally friendly, at room temperature and atmospheric pressure does not react with acid and alkali, sweat is not easily disseminated and corrosion, making it the sword of production has a profound effect. Tungsten alloy counterweight so that the overall weight of the hilt of the sword to reach an equilibrium level of use, increased use of comfort, while the difference between its counterweight methods are:

1:Surround handle method. Adding tungsten alloy that is on the sword handle counterweight. Since the diameter of the handle of the sword is longer, operate more simple and beautiful, and therefore the use of this approach to the hilt with heavy tungsten alloy is more common.

2:Handle end counterweight method. This hilt with heavy tungsten alloy counterweight law allows the tip to maximize away, according to the lever principle, which can be more effective in reducing the balance.

3:Hollow core material law. Upcoming sword handle join hollow core material. This method does not affect the appearance, the operation is relatively easy, the feasibility is strong. The disadvantage is that it is difficult to precisely control a custom length.


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In theory, as its density is 19.1g/cm3, which is approximately 70% denser than lead, uranium could be the good gold substitution, used as material of making fake coin. However, uranium is weakly radioactive and not as dense as gold, 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 enjoys the superiority to be the best gold substitution for the costly metal of gold or platinum.


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As a gold substitution,tungsten alloy gold bullion also called tungsten gold plated bar.

Tungsten alloy gold bullionis real, honest money and many say the best form of money the world has ever known. It is a store of value and a safe haven in times of crisis.

Gold is rare, durable and does not wear out in the manner of lesser metals (or paper!) when passed from hand to hand.

 A small amount, easily carried, can purchase a significant amount of goods and services.

Gold-plated bullion is universally accepted, and can be easily bought and sold around the world.




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