Products Description
A washer is a thin, flat material with a hole in the center that is used with bolts and nuts to distribute the load of threaded fasteners.
Tungsten washers are known for their extremely high density; due to this unique property, they are often used to balance rotating parts. The high quality of tungsten also makes these gaskets radiopaque. This allows the tungsten gasket to block radiation and show up well on X-rays - even better than lead.
Tungsten washers are typically made from a tungsten alloy that meets ASTM B777 standards, containing 90 to 97 percent pure tungsten and alloyed with nickel and copper or nickel and iron. Fasteners can also be made from commercially pure (CP) tungsten.
Products Description
|
Tungsten Alloy ASTM-B777 |
Class1 |
Class 2 |
Class3 |
Class 4 |
CP Tungsten |
|
Material Composition |
90% W 6% Ni 4%Cu |
92.5% W 5.25% Ni 2.25%Fe |
95%W 3.5% Ni 1.5% Cu |
97% W 2.1% Ni 0.9%Fe |
99.95% W |
|
Density |
17gm/cc |
17.5gm/cc |
18gm/cc |
18.5gm/cc |
19.3gm/cc |
|
Density; Ibs/in3 |
0.6 |
0.6 |
0.7 |
0.7 |
0.697 |
|
Mil.Spec.T-21014D |
Class1 |
Class2 |
Class 3 |
Class 4 |
ˉ |
|
Type |
Type Ⅱ & Ⅲ |
Type Ⅱ& Ⅲ |
Type Ⅱ& Ⅲ |
Type Ⅱ &Ⅲ |
- |
|
Hardness; Rockwell C |
24.0 |
26.0 |
27.0 |
28.0 |
31.0 |
|
Ultimate Tensile Strength; PSI |
94,000 |
94,000 |
100,000 |
142,000 |
|
|
Yield Strength, .2% Offset; Psi |
75,000 |
110,000 |
75,000 |
109,000 |
|
|
Modulus of Elasticity; |
75,000 |
75,000 |
|||
|
PSI Coefficient of |
40×10E6 |
47×10E6 |
45×10E6 |
53×10E6 |
58×10E6 |
|
Thermal Expansion x Electrical Conductivity;%IACS |
5.4 14 |
4.6 13 |
4.4 16 |
4.5 17 |
4.2 18 |
| Electrical resistivity ( µOhmcm ) | 5.4@20°C |
| Superconductivity critical temperature ( K ) | 0.0154 |
| Temperature coefficient ( K⁻¹ ) | 0.00480 @0-100°C |
| Thermal emf against Pt (cold 0C - hot 100C) ( mV ) | 1.12 |
Mechanical Properties
| Bulk modulus ( GPa ) ( Hard ) | 311.0 |
| Bulk modulus ( GPa ) ( Soft ) | 311.0 |
| Hardness - Vickers ( kgf mm⁻² ) ( Hard ) | 500 |
| Hardness - Vickers ( kgf mm⁻² ) ( Soft ) |
360 |
| Material condition | Soft |
| Material condition | Hard |
| Poisson's ratio ( Hard ) | 0.280 |
| Poisson's ratio ( Soft ) | 0.280 |
Thermal Properties
| Coefficient of thermal expansion ( x10⁻⁶ K⁻¹ ) | 4.500 @0-100°C |
| Latent heat of evaporation ( J g⁻¹ ) | 4009 |
| Latent heat of fusion ( J g⁻¹ ) | 192.00 |
| Melting point ( C ) | 3410.00 |
| Specific heat ( J K⁻¹ kg⁻¹ ) | 133.0 @25°C |
| Thermal conductivity ( W m⁻¹ K⁻¹ ) | 173.00 @0-100°C |
Our product features
FEATURES
High density.
Our gaskets not only help improve the stability of rotating machinery, but also give the gaskets excellent radiation shielding capabilities, making them able to effectively block X-rays and other forms of radiation, even better than traditional lead materials.
High melting point (3420°C).
Its stability in high-temperature environments makes tungsten gaskets an ideal choice for extreme environments such as high-temperature vacuum furnaces.
Excellent corrosion resistance.
This enables it to maintain its performance in harsh chemical environments.
Products application
application
Aerospace:
Very suitable for manufacturing aircraft parts and rocket engines, not only for controlling weight distribution, but also for shock absorption and noise reduction, improving the overall performance of the aircraft and passenger comfort.
Automobile industry:
Very suitable for the construction of engine components, transmission systems and exhaust systems.
oil and gas industry:
Use it to provide radiation shielding properties to protect equipment used in oil and gas detection, as well as downhole logging density and the ability to withstand strong hydrostatic pressure.
Construction:
Provides unparalleled stability and support in structural applications.
medical:
They also play an important role in the medical community due to their low magnetic properties and radiopaque properties.
Products process
Manufacturing process of fasteners:- In order to achieve high precision requirements, our products are produced using the following manufacturing techniques:
Turning and CNC Turning - for surfaces and threads
Milling and CNC milling - for screw heads
Drilling and punching - for washers
Thread rolling - for threads
ehisen
who we are?
Founded in 2004, the company is a high-tech enterprise focusing on the production of advanced metal materials, including smelting, profiling, machining, and precious metal anode research and development. The company is equipped with rolling, heat treatment, stamping, alloy production machinery, processing centers, electroplating, titanium anode production lines and precious metal coating laboratories, as well as related testing equipment. After years of development, it has developed into a comprehensive enterprise integrating R&D, production, manufacturing and sales. The company currently has 50 employees and covers an area of 15 acres, focusing on innovative manufacturing.
high quality
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high quality
advanced equipment
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packing delivery
packing delivery
1. Packaging materials: Use moisture-proof paper, plastic film, foam plastic and other packaging materials to prevent the product from getting damp or being hit.
2. Outer packaging: It can be placed in a wooden outer packaging box of appropriate size to prevent it from being squeezed or collided during transportation.
3. Anti-corrosion treatment: Apply anti-corrosion treatment or protective agent to the outer surface of required products to prevent corrosion in humid environments.
4. Label: Mark the product name, specifications, batch number, and manufacturer information.
5. Transportation method: Choose the appropriate transportation method, such as sea transportation, land transportation or air transportation, to avoid product damage during transportation.
service
Our Service Processes
Pre-sales Consultancy
1
>>
Confirmation of order
2
>>
Production
3
>>
Multi-Channel Shipping
4
>>
Confirmation of receives
5
>>
After-sale Services
6
FAQ
do you have any question?
What are the uses of tungsten?
Current uses are as electrodes, heating elements and field emitters, and as filaments in light bulbs and cathode ray tubes. Tungsten is commonly used in heavy metal alloys such as high speed steel, from which cutting tools are manufactured. It is also used in the so-called 'superalloys' to form wear-resistant coatings.
Is tungsten costly?
Tungsten rings are more expensive than gold rings because tungsten is a rare metal, making it difficult and costly to obtain. Additionally, the production of tungsten jewelry requires special equipment that can be costly to maintain.
Is tungsten metal brittle?
Tungsten is a metal with very attractive properties: It is corrosion-resistant and as heavy as gold. In the form of tungsten carbide, it is as hard as diamond. And it has the highest melting point of all metals, 3,422 degrees Celsius. However, the metal is highly brittle at room temperature.
Why isn't tungsten used in armor?
Thickness wise, compared to many other materials, tungsten would make a rather effective armor material. However, when it comes to weight vs. protection offered, tungsten is not particularly efficient, it's too dense.
contact us
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+86 18700703333 Elsa lin
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