Tungsten Bar

This is a sub site of Chinatungsten.com for especially introducing one type of our products-tungsten bar which always used for melting steel alloy and the other usages.

We hope in our website you may find the materials which meet your requirement. But if you cannot find what you need, please visit our general site Chinatungsten for more information about tungsten products, or you may contact us directly for your requirements and/or your questions. 

  Grade    
In reference to different chemical components and applying requirement, the grades of products are divided into four categories:W1, W2 ,W3,W4.

  Dimensions 
(10-14)×(10-14)×(400-600) mm
The length of the finished products for W1, W2, and W3 should not be less than 300mm, and that for W4 should no be less than 30mm. 

   Appearance 
The appearance of tungsten bar turns to be metallically gray or dark gray. Hygroscopy is not allowed on the appearance of W1 ,W2, and W3 tungsten bars.

  Surface State   
Any oxidation, contamination, and severe excessive fusion, bubbling, delamination, or crack is not allowed for product W1. Camber should be no more than 10mm. Any excessive fusion, bubble, delamination, crack, surface bulky crystallization or severe oxidation &contamination are not allowed for products W2 and W3. The length of the spalls should not be more than 8mm, width no more than 3mm, depth no more than 1mm; The diameter of mechanical pitting should not be more than 1mm, depth no more than 0.5mm; Camber should be no more than 4mm.
Any oxidation or contamination is not allowed for product w4.
The cartridge of the vertical sintering part should be cut off, and the section is not allowed to be loose or intermingled. 

  Physical properly   
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.

  Chemical Composition 

Grades

WB-1

WB-2

WB-3

WB-4

Typical-1

Typical-2

Impurities
%,max

Pb

--

--

--

0.001

--

0.001

Bi

--

--

--

0.001

--

0.001

Sn

--

--

--

0.001

--

0.001

As

--

--

--

0.002

--

0.001

Fe

0.005

0.005

0.010

0.05

0.005

0.020

Ni

0.003

0.003

0.005

0.30

0.002

0.005

Al

0.002

0.002

0.005

0.005

0.001

0.003

Si

0.003

0.003

0.010

0.010

0.0015

0.002

Ca

0.003

0.003

0.005

0.005

0.002

0.005

Mg

0.002

0.002

0.005

0.010

0.001

0.001

Mo

0.010

0.010

0.20

0.20

0.003

0.050

P

0.001

0.001

0.002

0.005

0.001

0.001

C

0.005

0.008

0.010

0.010

0.003

0.003

O

0.003

0.003

0.005

0.008

0.003

0.008

N

0.003

0.003

--

--

0.003

--

Sb

--

--

--

0.001

--

0.0005

Uses

Material for making tungsten alloy

For Processing material

For processing material

For alloy additive

For processing material

For alloy additive