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W
Tungsten


Atomic no.:
74
Atom. weight: 183.84
Density: 19.25
Class:
refractory metal
Melting point: 3410°C
Boiling point: 5657°C
Colour: Array
   
Discoverer: Carl Wilhelm Scheele
Place: Koping, Sweden
Year: 1781

Tungsten was isolated in 1783 by J.J. and F. Ehuijar in Vergara, Sweden. Tungsten metal is lustrous and silvery white in color, 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.

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  entries 1 to 8 from 53 Gallery view   periodic table

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 Tungsten electrode 99.95% - 23.92x10x6mm 31.28 grams  Art. Nr. 005011  
Tungsten electrode 99.95% - 23.92x10x6mm 31.28 grams
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Pure Tungsten ingot 99.95% - Length 20mm - Width: 14.39mm, height 6mm - 31.28 grams

Tungsten - Collector piece

Feels very heavy in your hand. A Physicist would say: "there must be something wrong with the gravitation.." :-)

For your elements collection, for high temp applications, laboratory etc.

 

Amount: 1 Stück
Purity : 99.95%
Packing: PE-foil
20.00
- tax free
5-9 pcs.: 19.00 Euro
>9 pcs.: 18.00 Euro
Availability: 18 in stock

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 Nice Tungsten doped glass bead NEW!  Art. Nr. 004882  
Nice Tungsten doped glass bead NEW!
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Glass bead doped with 1% Tungsten Ions

Size about 13mm - Weight ~ 1 . 1.4 grams - Material: Ba Phosphate glass

Nice glass bead. Each one handmade of phosphate glass in our lab.

  • The beads shows the typical tungsten blue color

Amount: 1 St. / 1 pc.
Purity : --
Packing: ampoule
30.00
- tax free

Availability: 5 in stock

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 Acrylic Element cube - Tungsten W - 50mm  Art. Nr. 004765  
Acrylic Element cube - Tungsten W - 50mm
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The Sensation! Acrylic Element-blocks NEW!

Tungsten W - pure tungsten metal foil

The innovation! Selected element samples in amply amount embedded in 50x50x50mm first-class crystal clear acrylic (not cheap resin!) . Totally lightfast, high gloss polish. The text is embedded inside! Hand crafted! Made in the European Union! Each acrylic block is a unique and individual piece! EXTREMELY eye-catching!

These original acrylic cubes are used in many important and famous periodic table collections allover the world!

100% Handmade in the European Union!

 

Each cube comes in its separate original box!
     

Complete illuminated displays with our cubes are available on request

Amount: 1 St.
Purity : 99.95%
Packing: PE bag
60.00
- tax free

Availability: 3 in stock

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 Acrylic Element cube - Tungsten W - 50mm  Art. Nr. 003468  
Acrylic Element cube - Tungsten W - 50mm
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The Sensation! Acrylic Element-blocks NEW!

Tungsten W - pure tungsten metal - heating spiral

The innovation! Selected element samples in amply amount embedded in 50x50x50mm first-class crystal clear acrylic (not cheap resin!) . Totally lightfast, high gloss polish. The text is embedded inside! Hand crafted! Made in the European Union! Each acrylic block is a unique and individual piece! EXTREMELY eye-catching!

These original acrylic cubes are used in many important and famous periodic table collections allover the world!

100% Handmade in the European Union!

 

Each cube comes in its separate original box!
     

Complete illuminated displays with our cubes are available on request

Amount: 1 St.
Purity : 99.95%
Packing: PE bag
60.00
- tax free

Availability: 2 in stock

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 Tungsten metal small polished discs 5g - 99.95% purity  Art. Nr. 003156  
Tungsten metal small polished discs 5g - 99.95% purity
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Tungsten - small polished discs - 5 grams - 99.95% purity

different sizes from 3 - 8mm - thickness about 0.5mm

For your elements collection, for high temp applications, laboratory etc.

The picture shows the average quantity you get.

 

Amount: ca. 5g
Purity : 99,95%
Packing: PE bag
8.00
- tax free
5-9 pcs.: 8.00 Euro
>9 pcs.: 7.00 Euro
Availability: 12 in stock

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 Fine Tungsten Powder, 25 grams , purity 99,99%  Art. Nr. 001088  
Fine Tungsten Powder, 25 grams , purity 99,99%
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Fine high purity tungsten metal powder

in sealed glass bottle. 25g net weight.

For laboratory use and elements collection.

Amount: 25g
Purity : 99,99%
Packing: glass bottle
20.00
- tax free
5-9 pcs.: 19.00 Euro
>9 pcs.: 18.00 Euro
Availability: 52 in stock

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 Tungsten metal filament 2 inches wide x 0.25 inches dia.  Art. Nr. 003089  
Tungsten metal filament 2 inches wide x 0.25 inches dia.
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Pure tungsten metal filament

Tungsten filament, 3 x .030" strand, 7.5 turns, 2 inches wide, 2.2 inches high, .25 inch inner diameter

such filaments can be used for high temperature applications up to 5400 deg. F. like lab furnaces, evaporation furnaces, electron tubes etc.

Amount: 1 Stk/pc.
Purity : 99.95%
Packing: PE foil
10.00
- tax free
5-9 pcs.: 9.00 Euro
>9 pcs.: 9.00 Euro
Availability: 67 in stock

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 TUNGSTEN precision density-standard cube 1cm3  Art. Nr. 003397  
TUNGSTEN precision density-standard cube 1cm3
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TUNGSTEN -  precision density-standard cube 1cm3 NEW!

Using finest materials, each density cube was lapped to 10x10x10mm by a mechanical engineering company with an accuracy of 0.01 millimeter. Each one separately ground and polished it represents the theoretical density of the respective element by its weight. The weight is not affected by the laser inscription. Information such as element symbol, name and density is durable burned at the surface. Each element even shows its specific characteristis in colour and reaction with the laser. Altogether 25 elements are planned in a complete set in a wooden case.
Lead time: ~ 2 weeks

Amount: 1 St. / 1 pc..
Purity : ~99,95%
Packing: PE - bag
120.00
- tax free

***Lead time: ~ 2 weeks ***

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