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Tungsten Products

  Tungsten Rods  
Chemical Composition
Designation Tungsten Content Impurity Elements Content
Total Each
WAL1,WAL2 99.95% 0.05% 0.01%
W1 99.95% 0.05% 0.01%
W2 99.92% 0.08% 0.01%
    Note: Potassium is not counted in impurities content.

Type and Size
Type Swaged Rods Straightened Rods after Drawn Grund rods available
Size 2.4~50mm 0.8 ~3.2mm

Applications
* For producing electric light source parts and electric vaccum components;
* For producing heating elements and refractory parts in high temperature furnaces.
* For producing eletric contacts.


  Tungsten Wires  
Chemical Composition
Designation Tungsten Content Impurity Elements Content
Total Each
WAL1,WAL2 99.95% 0.05% 0.01%
W1 99.95% 0.05% 0.01%
W2 99.92% 0.08% 0.01%
Note: Potassium is not counted in impurities content.

The diameter and tolerance of W-wire
Diameter
( ) 		200mm Weight
(mg/200mm) 		Weight(mg/200mm) tolanrance(%) Diameter tolerance(%)
Grade 0 Grade Grade Grade 0
Grade
Grade
5 d 12 0.075~0.44 -- 4 5 --
--
--
12< d 18 >0.44~0.98 -- 3 4 --
--
--
18 < d 40 >0.98~4.85 2 2.5 3 --
--
--
40 < d 80 >4.85~19.39 1.5 2.0 2.5 --
--
--
80 < d 300 >19.39~272.71 1.0 1.5 2.0 --
--
--
300<d 350 >272.71~371.79 1.0 1.5 --
--
--
350<d 500 -- -- 1.5
2.0
2.5
500<d 1800 -- -- 1.0
1.5
2.0

Appearance: W-wire is regular black covered with graphite. After graphite removed it is metallic luster.

Applications:
* For producing electric light source parts and electric vaccum components;
* For producing heating elements and refractory parts in high temperature furnaces;
* For producing heating elements used in vaccum metalizing or plating.


  WRe3/WRe25 Thermocouple  
Grade Diameter
(mm) 		Working Temperature
 Accuracy
% 		Uniformity( )
(at1500)
WRe3(+) WRe25(-)
Gr. 0.1 1800 0.25 40 30
Gr. 0.1,0.25,0.5 1800 0.5 45 35

Application
  * Mainly used to measure temperature (<2000℃) under reductive atmosphere.


  Tungsten Granules  

Appearance: Grey polyhedral crystal

Particle size: - 12~+0 mesh, plus sieve material, 5%  minus, 7%

Impurity Content: C 0.001%, S 0.001%.

Application: Mainly used as the flux for the analysis of carbon and sulphur.


  Tungsten Alloys  

Tungsten alloys are materials with a high tungsten content and low amounts of NiFe or NiCu.

Advantages:
  * High density (17.0~18.5g/cm3)
  * Good machinability
  * Good mechanical properties
  * High modulus of elasticity
  * High absorption capacity against x-rays and v-rays
  * Harmless to the health and environment.

Applications:
  * rotection shields for nuclear radiation
  * Balancing weights
  * Substitutional material for Uranium
  * Electroheat upsetting anvil block
  * Balls in bomb.
  * High voltage electrical contact




  Tungsten-Copper Composites  

    WCu composites are offered with 10～40wt.％ Cu.

Advantages:
  * High arc resistance combined with good electrical conductivity
  * High thermal conductiveity
  * Low thermal expansion

Applications:
  * Arcing contacts and vaccum contacts in high and medium voltage breakers or vaccum interruptors
  * Electrodes in spark erosion cutting machines
  * Heat sinks as passive cooling elements of electronic devices.


  Tungsten evaporation boats and coils  

All kinds of tungsten evaporation boats and coils are available according to the requests of customers.

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11 Add: Zhaoli Industrial Zone, Lucheng Town,
         Tongzhou District, Beijing
Zip Code: 101117
Tel: 86-10-69590276, 69590278, 69590273
        86-10-69590274
Fax: 86-10-69590277
E-mail: tlwm@china.com
Beijing Office: Room 102, Unit 2, Buiding 4, TongRenYuan,
                          LiuJiaYao,Fengtai District,Beijing
Zip Code: 100075
Tel: 86-10-87681484, 87681485, 87681486
Fax: 86-10-87681486