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Tungsten Alloy

ungsten based high specific gravity ( Tungsten Alloy) Tungsten-based high specific gravity alloy is based on tungsten (containing 80% ~ 99% of tungsten) adding a small amount of nickel iron copper and other elements of the alloy with a s

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Tungsten based high specific gravity ( Tungsten Alloy)
Tungsten-based high specific gravity alloy is based on tungsten (containing 80% ~ 99% of tungsten), adding a small amount of nickel, iron, copper and other elements of the alloy, with a significant ratio, High strength, strong ability to absorb radiation, large thermal conductivity, small thermal expansion coefficient, good electrical conductivity and processability.

There are two main types of high specific gravity tungsten alloys:
1.W-Ni-Cu system generally contains 90-95% tungsten, and nickel to copper content ratio is 3:2. Copper can lower the melting point of the nickel binder phase and improve the sintering properties of the alloy. These alloys are non-ferromagnetic and have a simple preparation process.
2. W-Ni-Fe system generally contains 90-98% tungsten, and the nickel-iron content ratio is 7:3 or 1:1. These alloys can be heat treated and plastically processed. The strength (σb) of the alloy after plastic working can reach 120 kg/mm2 or more. On the basis of the above two types of alloys, molybdenum, chromium, cobalt, rhodium, platinum, rhodium, palladium and metal oxides (or metal fibers) may be added to improve the process properties, corrosion resistance and mechanical properties of the alloy.

Tungsten-based high specific gravity alloy grade

Brand	Tungsten nominal content	density	hardness	tensile strength	Elongation
Brand	Weight fraction %	g/cm3	Rockwell C	MPa	%
Class1	90	16.95-17.25	24-32	≥760	≥5
Class2	93	17.45-17.85	25-30	≥760	≥4
Class3	95	17.95-18.35	25-35	≥725	≥3
Class4	97	18.45-18.85	30-35	≥700	≥2

Available tungsten-based high specific gravity alloy specifications

Material	Plate	Bar
90WNiFe	Customizable specifications	Customizable specifications
93WNiFe
95WNiFe
97WNiFe
90WNiCu
93WNiCu
95WNiCu
97WNiCu

Tungsten-based high specific gravity alloy chemical composition

Tungsten-based high specific gravity alloy use field

1. Sporting goods series products:
Professional tungsten alloy darts benchmarking
tungsten alloy fishing pendant series: bullet type, water drop type, round tube type, half drop type, cylindrical hole type.
Tungsten beads, tungsten ball series: φ1.5mm -φ10mm Accuracy ±0.01mm, used for fish weight, submunition, medical instrument counterweight, shotgun projectile; φ0.1mm-φ10mm accuracy ±0.1mm, used for oil drilling balance, Shotgun projectile.

2. Counterweight products:
high-density tungsten-based alloy weight series: mechanical balance hammer; flying hammer; oil drilling counterweight; darts; golf weights; racing weights; mobile phones, game console vibrators; Aerospace gyroscope; watch pendulum; balance weight ball; shock bar.

3. Medical equipment:
Medical tungsten alloy ray shielding material series: 1. Tungsten alloy grating blade; 2. Tungsten alloy protective tank - used for medical radiation shielding wall; Shielding needle tube - used for medical radioactive liquid shielding; Alloy memory - a container for tanks, boxes, etc. for storing radioactive materials. 3, collimator - for the medical linear accelerator and nuclear technology applications in the tungsten alloy series of detection container system collimator; Co60 other radiation shielding.

4. Electrical materials:
electrodes for electric discharge machining and electrodes for electric resistance welding; contacts for high specific gravity electrical contacts and air circuit breakers.

5. Military products:
armor-piercing projectiles; submunitions, balls, rods, squares, cylinders, other tungsten alloy electric blocks, tungsten alloys for nuclear technology applications.

6. High specific gravity alloy heat sink material
Due to high temperature resistance and good heat dissipation performance, high-specific gravity tungsten alloy materials have been widely used as heat sink materials in the electronics industry, such as various computer CPUs.

Tungsten-based high specific gravity alloy supply form
1. polished surface
2. annealed state

Preparation method of tungsten-based high specific gravity alloy

1. Mixing: Tungsten powder, nickel powder, iron powder (if the product has magnetic requirements, copper powder can be added instead of iron powder for uniform mixing)

2. Mixing →vacuum drying→press molding →Pre-burning degreasing→Processing→vacuum sintering→Quality testing→Blank products→Subsequent processing (oil immersion, machining, heat treatment, electroplating, rolling, forging, etc.)→fine grinding products→product delivery

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Tungsten Alloy

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