Tungsten Powder Price

Tungsten Bank Fishing Sinkers

Details: Category: Tungsten Information; Published on Wednesday, 10 September 2014 08:51; Written by Sherry; Hits: 483

Tungsten bank fishing sinkers also known as reef sinkers resemble seeding leaves or egg fishing sinkers but the bank sinkers do not have a brass loop to hold the line. The bank reef fishing sinkers have a lead-mold eye, just like peduncle of seeding leaves.

These seeding leaves-shaped and tapered-shaped sinkers feature for hexagon sides other than smooth round surface, and the flat sides of the bank fishing sinkers contribute to preventing the sinkers from rolling in current and the tapered shape prevent the fishing sinkers from snagging in rocks.

Tungsten bank fishing sinkersare widely used in the past and of course it is commonly adopted by many anglers now as it works well and its bulbous shape prevents it from hanging up on the rocks.

Tungsten alloy is widely used to be the materials for fishing sinkers, contributing its environment friendly which the traditional material lead can not reach. What is more, it’s the good corrosion resistance property which makes the tungsten bank fishing sinkers more widely used.

Bank-fishing-sinkers

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Tungsten’s Military Applications

Details: Category: Tungsten Information; Published on Wednesday, 10 September 2014 08:47; Written by yewq; Hits: 466

Tungsten, in military applications, is used as a hardening agent to produce armor penetrating rounds in bullets,. It is also used for fragmentation to create a devastating effect as its hardness remains intact as it shreds through targets. Tungsten is also used in cube and ball form in anti-personnel ordnance, ranging from grenades, to mines and rockets, these added tungsten cubes and balls are highly destructive due to their retention of their hard features, solid shapes as they impact. Tungsten alloys are also used in defensive plating, due to their hardness and strength. Tungsten carbide and other alloys are also used to make penetrators for weaponry, to enhance their effectiveness.

Another widely used application of tungsten in defense is the various weighting applications used in helicopters and other aircraft and armored vehicles. Helicopters use this tungsten to weight their rotors, noses, and skids. Tungsten alloys is widely used in these applications because of its hardness and size to weight ratio it is a perfect material for weighting and protection.

Companies around the world are also using tungsten in their production of military ammunitions, due to its environmentally friendly composition, as compared to lead, which has been proven in several ways to be increasingly destructive of the environment. Tungsten carbide, and other alloys have all been proven to be “clean” metals, which makes them an ideal choice internationally as we move towards grTungsten’s Military Applications
eener technologies.

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What Are the Different Tungsten Products?

Details: Category: Tungsten Information; Published on Tuesday, 09 September 2014 15:05; Written by jwy; Hits: 442

Tungsten products generally include everything from household items to aerospace technology. The metal is almost as dense as gold and has the highest melting point of any metal in purest form at 6,192°F (3,422°C). These properties popularize the use of tungsten in many applications. Tungsten has a wide range of industrial use when combined with other elements and industrial metals to make metal alloys or superalloys.

People use tungsten products daily without realizing it. Extreme heat resistance enables thin tungsten wire to be used as the filament in incandescent light bulbs, for example, and when combined with calcium and magnesium, it becomes fluorescent lighting. This quality also allows tungsten to be incorporated into the heating elements of heaters and furnaces. Artisans also might use tungsten oxide in ceramic and glassware glazes, producing a yellowish hue. Comparable to gold in hardness, the metal may substitute for gold or platinum in jewelry making, as tungsten is hypoallergenic and virtually scratch resistant.

Tungsten weights or powder might also be implemented to enhance the driving force in golf club heads. Tungsten combined with copper, iron or nickel may be used in making high-quality darts or for the strings of certain musical instruments. Commercial aircraft, race cars and yachts contain tungsten products, as the metal’s density provides counterweight, weight and stability.

Tungsten alloys are frequently incorporated into the turbines of aircraft engines as well. The metal is a constituent of various military items, as tungsten products are a part of the nozzles of projectile rockets and armor penetrating missiles. Cobalt, iron, nickel and tungsten also are the components used in cannon shells and grenades.

Tungsten inert gas, or TIG, welding uses a durable tungsten electrode to produce a stronger binding force when welding various metals. Tungsten or metal alloys may be cast from molds or particle sprayed to provide strength. Durable, long-lasting tungsten grinding wheels may be used in dentistry, metal or stone cutting and woodworking. When combined with steel or carbon, industries use tungsten products for construction, drilling and mining as well. Unaffected by oxygen, alkalis or most acids, the metal is commonly used as bearings, pistons, valve seats and other machine parts where friction, heat or corrosion are factors.

Medical tungsten products include the emitter coils in X-ray tubes and the shields used to protect personnel from radiation exposure. Calcium, magnesium and tungsten phosphorus convert X-rays into visible light for viewing. Tungsten is also typically used in liquid crystal displays and the manufacturing of microchips.

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Properties Of Cemented Tungsten Carbide

Details: Category: Tungsten Information; Published on Tuesday, 09 September 2014 15:46; Written by jwy; Hits: 508

A cemented carbide is a composite material comprised of individual tungsten carbide grains imbedded in a ductile metal binder matrix of either cobalt or nickel. The physical and metallurgical properties of a particular “grade” of carbide are determined by its composition (its constituents and their relative amounts), the size distribution of the tungsten carbide grains after sintering, the binder metal type and content, the quality of the raw materials used, and the workmanship with which the material is made. Those most commonly measured to assess quality and define application areas are described below. The ASTM and/or ISO standard that applies to each of these measurements is also noted.

Density or specific gravity is the weight per unit volume of a cemented carbide measured in grams per cubic centimeter (g/cm3). It is essentially the weighted average of the densities of all of the components contained in the product and is therefore a check on its composition. For grades containing only tungsten carbide and a binder metal, the density of the composite decreases as the lighter binder metal content increases.

Hardness is the resistance of a cemented carbide to penetration by a diamond indenter under a specific load. It is measured on the Rockwell A (Ra) scale in the US and on the Vickers (HV10 or HV30) scale in Europe and elsewhere. Hardness is primarily a function of composition and grain size with higher binder metal contents and coarser tungsten carbide grain sizes producing lower hardness values. Conversely, low binder contents and fine grain sizes produce high hardness values. Hardness is directly related to abrasive wear resistance.

Transverse Rupture Strength (TRS) is a measure of the tensile strength of a cemented carbide in a three point bending test performed on standard rectangular bars. It is reported in units of pounds or thousands of pounds per square inch (psi or kpsi), or in Newtons per square millimeter (N/mm2). TRS is perhaps the best measure of the relative utility of individual production batches since it surveys a reasonable volume of material and will detect low levels of critical internal defects. Products having relatively high TRS values are generally applied where shock, impact, or failure by breakage are factors.

Residual Porosity is determined by visually examining the polished surface of a sintered sample at 100X or 200X magnification. Ratings for “A” type porosity (pores less than 10 microns in diameter), “B” type porosity (pores larger than 10 microns in diameter), and “C” type porosity (carbon inclusions) are determined by comparing the size and frequencies of each pore type in the sample with those in standard photographs. Each standard photograph is associated with a numerical rating that is used to represent the porosity levels in the sample. In general, edge strength and toughness decrease as the level of residual porosity increases. At high levels of porosity, the wear resistance of the product may also be adversely affected.

Magnetic Saturation is the degree to which the metal binder in a cemented carbide is saturated with carbon. It is most useful for materials having a cobalt binder. For a known cobalt content magnetic saturation values indicate how much carbon the cemented carbide contains – from unacceptably low values that indicate the presence of an undesirable carbon-deficient phase (known as eta phase) to unacceptably high values indicating the presence of free carbon (carbon “porosity”) in the product. Magnetic saturation is sometimes used as an indicator of relative strength among lots of a specific grade.

Coercive Force is the strength of the magnetic field required to demagnetize a fully magnetized cemented carbide sample. Coercive force is typically measured in oersteds (Oe). The coercive force measurement depends on many factors including composition, sintered grain size distribution, residual porosity levels, and others. It is sometimes used as an alternative indication of hardness, but is best interpreted in combination with other properties as a measure of overall grade uniformity.

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What Is Tungsten?

Details: Category: Tungsten Information; Published on Tuesday, 09 September 2014 15:01; Written by jwy; Hits: 441

Tungsten is a metallic chemical element classified among the transition metals of the periodic table of elements. It is well known for its strength and durability, which make it extremely useful in a wide range of industrial applications. Some consumers also own products which contain tungsten or were produced with the metal. The world's major sources of this element are Russia, Austria, China, and Portugal, where it is extracted from minerals such as scheelite and wolframite.

This element is not found in a pure form in nature. When it is isolated, tungsten in a very hard, brittle, gray to white metal that is extremely corrosion resistant. It has the highest melting point and tensile strength of any metal, and it also has the lowest vapor pressure point. The metal is identified with the symbol W on the periodic table of elements, a reference to its alternate name, wolfram. Tungsten's atomic number is 74.

People have known about the existence of tungsten since at least the early 1700s, when observers noted that the metal interacted with tin. In 1784, the de Elhuyar brothers managed to isolate it in Spain, using tungstic acid extracted from wolframite. Tungsten has classically been a very valuable metal, since its durability and strength make it extremely useful for military and industrial uses. The name of the element comes from the Swedish tung, or “heavy,” and sten, for “stone.”

One of the most famous uses of tungsten is as a filament in light bulbs. The metal is also used in an assortment of alloys to increase their hardness and tensile strength. Many structural metal alloys use it since the metal has an extremely high melting point, and the element is also used to make wear-resistant tools. While these tools can be expensive, many workers like them because of their durability and long lifetimes.

Tungsten does have some safety precautions. Dust from the metal can be flammable or explosive, and it also irritates mucus membranes, such as those inside of the nose and mouth. In some regions, tungsten has been linked with serious infections of the lungs in people who work with the element on a regular basis without adequate protections. Exposure to the metal has also been correlated with increased rates of cancer, although hard evidence to turn the correlation into causation has not been uncovered.

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