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Tungsten high heavy alloy Home - Product - Tungsten&molybdenum alloy - Tungsten high heavy alloy - main

Tungsten high heavy alloy

- Balancing weights

- Substitutional material for Uranium

- Electroheat upsetting anvil block

- Balls in bomb

- High voltage electrical contact

Tel: +86-15896504204
Description

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.

Application

- Balancing weights

- Substitutional material for Uranium

- Electroheat upsetting anvil block

- Balls in bomb

- High voltage electrical contact