Factory Add:Industrial Area,Xigong District, Luoyang, Henan, China
Office Add:Room3-2-402,Qiyi Road,Xigong, Luoyang,Henan,China
Post Code:471000
Tel:+86-15896504204
Fax:+86-379-60691660
Email: lyhuapei@aliyun.comm
Skype ID:yanzhendoris
Tungsten high heavy alloy
- Balancing weights
- Substitutional material for Uranium
- Electroheat upsetting anvil block
- Balls in bomb
- High voltage electrical contact
Material:W90-97NiFe(Magnetic)&W90-97NiCu(Nonmagnetic)
Density:16.8-18.8g/cm3
· High density (up to 65% denser than Lead).
· Denser materials exist (Uranium, pure Tungsten, Gold, platinum group metals) but their use is restricted by availability, workability and cost.
· Providing mass where volume space is limited.
· Concentrated weight essential where accuracy is required in placement of mass.
· Placement of weight in situations where airflow has a significant impact.
Machinability
· Possible, either to press components to shape, or to cut and shape material prior to sintering.
· Reducing the amount of final machining necessary to produce the finished component.
· Can be machined conventionally and without much difficulty.
·
Production Method
· Blending of tungsten powder with other metal powders and a bonding agent, cooling and sieving.
· Pressing the blended powder to the required shape (allowing for shrinkage during the final processing), and shaping the green part component.
· Pre-sintering the pressed components to remove the bonding agent.
· Final sintering in the hydrogen fed furnace to fuse the powder particles together.
· Supplied in bar, square, round and rectangle sizes are available in rough oversize, or turned or ground to exact requirements. Components can also be produced to customer drawings.
Thermal Properties
· High softening temperature.
· Low thermal conductivity and low coefficient of expansion gives the material a high resistance to thermal fatigue.
· Excellent soldering erosion resistance to molten aluminium.
· Strong at high temperatures with high thermal stability.
Mechanical Properties
· High Young's modulus of elasticity. Does not creep when experiencing significant forces, unlike Lead.
· Despite their strength, they remain ductile and resistant to cracking.
· The hardness range of the alloys is typically 20-35 Hardness HRC.
Tungsten Alloys
|
||||
EFI Grade |
EF17 |
EF175 |
EF18 |
EF185 |
ASTM B 777-07 |
1 |
2 |
3 |
4 |
Weight % Tungsten |
90 |
92.5 |
95 |
97 |
Nominal Density GM/CC |
17.00 |
17.50 |
18.00 |
18.50 |
Minimum* Ultimate Tensile Strength UTS (KSI) |
110 |
110 |
105 |
100 |
Minimum* Elongation % |
5 |
5 |
3 |
2 |
Modulus of Elasticity (KSI) |
45,000 |
48,000 |
50,000 |
52,000 |
Radiation Absorption
· For gamma rays and X-rays, 1.5 times more effective than Lead.
Corrosion Resistance
· More resistant to acid attack than stainless steel providing the ideal solution in hostile environments.
Health and Safety
· Presents no risk to health or the environment.
- Balancing weights
- Substitutional material for Uranium
- Electroheat upsetting anvil block
- Balls in bomb
- High voltage electrical contact