Hubei Fotma Machinery Co., Ltd.
Tungsten, Molybdenum, Titanium, Tungsten Carbide and Investment Casting Products
| Place of Origin: | P.R. China |
|---|---|
| Brand Name: | FOTMA |
| Certification: | ISO 9001:2000 |
| Model Number: | WAL-1, W-1 |
| Minimum Order Quantity: | 1 pc |
| Price: | Negotiable |
| Packaging Details: | Plastic boxes, Paper cartons |
| Delivery Time: | 20-25 days |
| Payment Terms: | T/T, L/C, Western Union, PayPal |
| Supply Ability: | 2 MT / Month |
| Purity: | > 99.95% | Diameter: | 0.1mm - 1.0mm |
|---|---|---|---|
| Length: | Customized | Surface: | Blanks, Acid Washed |
| Density: | > 19.2 G / Cc | Tolerance: | + / - 0.04mm |
| High Light: | WAL2 Wolfram Pure Tungsten Wires,WAL1 WAL2 Wolfram Wire,1.0mm Pure Tungsten Wire |
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WAL1 WAL2 Pure Tungsten Rod Wolfram Wires For Heating Elements Dia 0.1mm - 1.0mm
The pure form tungsten metal is used mainly in electrical applications. Usually tungsten contains small amounts of carbon and oxygen, which give tungsten metal its considerable hardness and brittleness. Metal tungsten is worked by forging, drawing, extruding, or sintering. Of all metals in pure form, tungsten metal has the highest melting point (3,422 °C, 6,192 °F), lowest vapor pressure and (at temperatures above 1,650 °C) the highest tensile strength. Tungsten metal has the lowest coefficient of thermal expansion of any pure metal. Alloying small quantities of tungsten with steel greatly increases its toughness
Applications of Tungsten Heating Elements:
Tungsten Heating element assembly as a sapphire crystal growth furnace heat source, play a decisive role for AI203 melt forming turbulent flow in crucible, and generate radial temperature gradient. Therefore,high purity,high density and sophisticated production, the rational design of tungsten heater assembly are important significance for sapphire crystal quality control, energy saving and service life.
Specifications of Pure Tungsten Rods for Heating Elements:
|
Type |
Kind |
Tungsten content (%) |
Total amount of impurity (%) |
The content of each element (%) |
Kalium content (ppm) |
|
WAL1 |
L |
>=99.95 |
<=0.05 |
<=0.01 |
50~80 |
|
B |
60~90 |
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T |
70~90 |
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WAL2 |
J |
40~50 |
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Note: Kalium should not be taken as impurity, and tungsten powder must be have been washed by acid. |
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