Tungsten Bar Introduction
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- Category: Tungsten Information
- Published on Friday, 19 September 2014 15:12
- Written by jwy
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Tungsten bar with impurities is used to procedure bulb filaments or electron tube filaments, which are guaranteed to have remarkable resistance to high temperature. Tungsten metal is lustrous and silvery white in colour, and does not occur naturally (it has an abundance of 1 ppm in the earth's crust). It is found in the ore Wolframite, a tungstate of iron and manganese, (FeMn)WO4, which is converted to the trioxide and then reduced to the metal by reduction in hydrogen (carbon cannot be used as the very stable carbide would result). Tungsten metal is relatively inert, resisting attack by oxygen, acids and alkalis, although it will react with fused, oxidising alkali media. It has the highest melting point of all metals and, when pure, it can be worked with relative ease; however, the presence of impurities renders tungsten extremely brittle and, therefore, difficult to fabricate.

The high melting point of tungsten makes it suitable for use as electric filaments (e.g. in electric light bulbs). It is also the basis of a range of alloys containing tungsten, copper and nickel which are used for radiation shielding as they provide a 50% increase in density compared to lead. Tungsten and its alloys also find uses in military applications (e.g. armour and shells), as well as counter-balance materials. Tungsten carbide powder (with possible additions of titanium and tantalum carbides) along with nickel or cobalt powders, are compressed and sintered to produce cemented carbides. These products are used in place of high speed steel to form the tip of cutting and drilling tools, or for parts which will be subjected to heavy useage.
Tungsten Manufacturer & Supplier: Chinatungsten Online - http://www.chinatungsten.com
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Tungsten Bar Physical Property
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- Category: Tungsten Information
- Published on Friday, 19 September 2014 14:59
- Written by jwy
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Tungsten bar is mainly used to found ingredient of material, cutter and heads, tungsten wire for lights instruments, electric contact points and conductor of heat, crankshaft and cylinder barrel of advanced automobile, ingredient of kinds of heat-resistant steel. Also used for making special steels, to make guns, artillery rockets, satellite airplane and ship. Tungsten bars have a luster rather like that of silver in uniform color. Though the whole tungsten bars may slightly curve, the maximum height of the bend should not be more than 7mm.

The density for W2, W3 tungsten bars is more than 17.5g/cm3.
Measured data for the section grain size of W2, W3 can be provided. If the buyer has any other special demand, it can be discussed on the base of mutual negotiation.
Quality Guarantee: The buyer should take an acceptance inspection on the goods in accordance with this standard in three months from the day of getting the goods. If the inspecting results do not meet the grade criteria set on the Quality Guarantee, the products is still regarded as unqualified after the unsuccessful mutual test.
Package: The products should be package in wooden boxes with inner shaped foam,6-12 pieces and 40kgs max. net each. Transportation: During the transportation, the goods should be moisture proof and clear of violent collision. Storage: Storage place: dry, ventilated, acid & alkali proof, anti-oxidant. The storage time should be limited in six months.
Tungsten Manufacturer & Supplier: Chinatungsten Online - http://www.chinatungsten.com
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Tungsten Tear Drop Shot Weight
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- Category: Tungsten Information
- Published on Friday, 19 September 2014 08:49
- Written by Sherry
- Hits: 547
Tungsten tear drop shot weight offers increased sensitivity over their lead counter parts. Tungsten is much harder than lead, which allows you to detect every pebble or piece of wood your weight comes into contact with. Tungsten tear drop shot weight is also more compact than lead weight for a more subtle presentation.
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How to Make Tungsten Gold plated Bar?
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- Category: Tungsten Information
- Published on Friday, 19 September 2014 14:52
- Written by jwy
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Start with a tungsten alloy about 1/8-inch smaller in each dimension than the tungsten alloy gold bar you want, then cast a 1/16-inch layer of real pure gold all around it. This product would feel right in the hand, and tungsten alloy gold bar would have a dead ring when knocked as gold should. tungsten Gold plated bar would test right chemically, weigh exactly the right amount, and also pass an x-ray fluorescence scan, the 1/16" layer of pure gold being enough to stop the x-rays from reaching any tungsten.The appliances of Chinatungsten tungsten gold plated bar and tungsten alloy fake gold bar as gold substitution.

Tungsten alloy gold bar and tungsten gold plated bar as a gold substitution could be regarded as the special present for some fields. If you are a broker in stock, manager in a big bank or insurance company, you can use Chinatungsten tungsten alloy gold plated bar engraved with your company's name as souvenirs to your VIP customers. It is a very decent present without costing too much, and also could attract more customers for your business.
Tungsten gold plated bar is the best choice if you are a gold dealer and attend some trade fair or put your gold products in the showcase. In case your real gold being stolen, you can choose gold substitution, tungsten alloy gold plated bar to reduce any possible loss.
Tungsten Manufacturer & Supplier: Chinatungsten Online - http://www.chinatungsten.com
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Ferro-Tungsten & Melting Base
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- Category: Tungsten Information
- Published on Thursday, 18 September 2014 15:09
- Written by jwy
- Hits: 578
Ferro-tungsten is a master alloy for the production of tungsten-containing steels. The raw materials for ferro-tungsten production are rich ore or ore concentrates of wolframite or scheelite. Also artificial scheelite or soft scrap can be used. The tungsten trioxide in these compounds can be reduced either carbothermically in electric arc furnaces or metallothermically by silicon and/or aluminum. Also a mixed carbothermic-silicothermic production is in use.
Commercial ferro-tungsten contains between 75 and 85% W. It has a steel grey appearance and a fine-grained structure consisting of FeW and Fe2W. It is supplied in 80–100 mm lumps.

Melting Base is another master alloy in tungsten steel production. It can have various compositions according to the tungsten scrap material in use. The tungsten content varies depending on type between 10 and 38% besides iron and sometimes 5.5% Mo and also 5 to 10% Co.
Different types of scrap materials are mixed to meet the required composition. Reductive melting is done in electric arc furnaces and the melt is finally granulated by casting on a rotating disc and quenching in water (size <10 mm).
Tungsten Manufacturer & Supplier: Chinatungsten Online - http://www.chinatungsten.com
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Email: sales@chinatungsten.com
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