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Tungsten Heating Elements

Specifications
1.Material grade :1700 C, 1800 C
2.Diameter:3/6,4/9,6/12,7/12,9/18
3.professional manufacturer
4.lower price and great quality

Quantity:
  • FOTMA
  • 81019990
Detailed Product Description
Purity: 99.95% Diameter: 0.01mm - 1.0mm
Length: Customized Surface: Acid Washed, Black
Density: 19.2 G / Cc Tolerance: + / - 0.02mm
 

 

99.95% Pure Customized Tungsten Products Tungsten Stranded Wire Heating Elements

 

Specification of Tungsten Stranded Wire:


1. Purity: 99.95%
2. Density: 19.3g/cm3
3. Type: W3101, W3102, W34, W1, W2
4. Content: W3 W34 W2: W≥ 99.95%
5. Character and usage
W3101: Twist wire; It has good character in high temperature and endurance. Second crystal temperature≥ 1950º C, mainly used as filament wire in halogen filament, high temperature color filament, twist filament, white filament and fluorescence filament. 
W3102: It has good character in roll and high temperature. Second crystal temperature≥ 1850º C, mainly used in white filament wire, vacuum tube heating wire. 
W34: Used in twist wire. 
W1 W2: Used as frame of vacuum tube, heating elements. 


6. Super thin white tungsten wire. 
Spaces: 3-14um

 

Diameter Tolerance of Tungsten Stranded Wires / Rods:

 

Diameter (mm)

Diameter tolerance

  Black  percent

  Polished  mm

Wire

0.5-0.8

± 2

-

> 0.8-3.0

± 0.03

Rods

> 3.0-6.5

± 0.05

> 6.5-11.0

± 0.08

 

Material Composition of Tungsten Wires for Heating Elements:

 

Grade

W MIN
%

Total  impurity content        % min

Each impurity content
         % min

WAL1,WAL2

   99.95

       0.05

         0.01

       W1

   99.95

       0.05

         0.01

       W2

   99.92

       0.08

         0.01

 

 


Grade 1700 1800 1900 MoSi2 Molybdenum Disilicide MoSi2 heating elements 
 
Molybdenum disilicide(MoSi2) heating element is a resistance generate-heating component made from MoSi2 or the basic material. It is used in high temperature under the oxidizing atmosphere, it looks like glass in its surface and form a light SiO2 glass film which can protect the element not to be oxidized. So this kind of element has unique effect for resisting oxidization in the high temperature. It is used to the highest temperature up to 1800°C during oxidizing atmosphere. And the applicable temperature is 500-1700°C.
 
Resistance property
The resistivity of element rapidly rises as the temperature rises. Under normal operating conditions,generally the element resistance doesn’t change with the service time changing. So the old and new elements can be mixed used.

Chemistry property
MoSi2 heating element is used in the high temperature under oxidizing atmosphere. It will form theSiO2 film which can keep the element from being melted. When the temperature of element is more than 1700°C,the MoSi2 heating element must not be used in the temperature between 400°Cand 700°C for a long time; otherwise the element will be cremated under the strong oxidizing function in the low temperature. 
 
 

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