Introduction to Ferro Tungsten (FeW)
Introduction to Ferro Tungsten (FeW)
Description
Tungsten, a silver-gray metal, is mined from scheelite and wolframite and appears in nature in four major forms combined with calcium, iron or manganese. Most current mine production of tungsten is from vein/stockwork, skarn, porphyry and strata-bound deposits. Minor amounts are produced from pegmatite, breccia and placer deposits. It has a high melting point and density, good thermal and electrical conductivity, a low coefficient of expansion as well as exceptional strength at elevated temperatures. It is consumed predominantly as tungsten carbide in cutting and wear-resistant components as well as an alloying agent in steel making. Also, often as an alloy, it is used for lamp and lighting filaments and electrodes, electrical and electronic contact surfaces, heat and radiation shielding in high-temperature furnaces and X-ray equipment, and electrodes in certain welding methods. Some non-metallurgical applications of tungsten are as phosphorescent chemicals in pigments, X-ray screens, television picture tubes and fluorescent lighting. Tungsten is also used in armor-piercing ordnance and tank shielding. The name tungsten comes from the Norse word thungr-steinn, which means "heavy stone."
Application
Ferro Tungstenh Improving the hot hardenability, abrasion resistance and impact strength of steel, used in production of high-speed tool steel, alloy tool steel, heat-resistant steel, spring steel and magnetic steel.
Specifications and Packing
Grade and Chemical Composition
|
Grade |
Chemical Composition % |
|
W |
C |
P |
S |
Si |
Mn |
Cu |
As |
Bi |
Pb |
Sb |
Sn |
|
max |
|
FeW 80-A
FeW 80-B
FeW 80-C
FeW 70 |
75.0-85.0
75.0-85.0
75.0-85.0
≥70.0 |
0.10
0.30
0.40
0.80 |
0.03
0.04
0.05
0.06 |
0.06
0.07
0.08
0.10 |
0.5
0.7
0.7
1.0 |
0.25
0.35
0.50
0.60 |
0.10
0.12
0.15
0.18 |
0.06
0.08
0.10
0.10 |
0.05
-
-
- |
0.05
-
-
- |
0.05
0.05
0.05
0.05 |
0.06
0.08
0.08
0.10 |
PACKING : IN IRON DRUM OF 100KG NET EACH
Size: 10-130MM 90%min | |
If you need any more details of the above news and/or products, please visit Chinatungsten Online, or contact us directly.
Disclaimer: The article is only reflecting the opinions of the author. We have no responsibility to prove the originality and authenticity of the content, words and/or pictures. You readers should just take it as reference and check the details by yourselves. And the content is not a suggestion for investment decision. The investor takes his or her own risks if he or she operates accordingly. If you have any dissent about the contents above, please contact the relevant author, or the webmaster. We will try our best to assist the dealing of the related issues. Thanks for your visit and cooperation.
|
