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Tungsten Heavy Alloys
Key words:
Tungsten Heavy Alloys
Classification:
Hotline:
Tungsten heavy alloys material formed by adding a small amount of Ni, Fe, Cu, Co, Mo, Cr and other elements into tungsten (generally with the content of 80%~98%) serving as the basis. High-specific-gravity tungsten alloy has the density of 15.20~18.70g/cm3, and is also called high-specific-gravity alloy or high-density alloy material by people. High-specific-gravity tungsten alloy is mainly divided into two series, W-Ni-Fe (weakly magnetic) and W-Ni-Cu (non-magnetic) even W-Ni-Fe-Cu. By comparison, W-Ni-Fe alloy has a higher mechanical property and plays a great role in the national defence industry and various fields of national economy, is a very important military new material in the national defence industry, and is gradually generalized to all the civil industries.
a. Large specific gravity: the specific gravity is generally 16.5-18.75g/cm³;
b. High strength: the tensile strength is 700-1,000Mpa;
c. Strong ray absorption capacity: 30-40% higher than that of lead;
d. Large heat conducting coefficient: the heat conducting coefficient of tungsten alloy is 5 times that of mold steel;
e. Small thermal expansion coefficient: 1/2-1/3 of that of iron or steel;
f. Good conductivity: it can be widely applied to illumination and electric welding industries because of its good conductivity;
g. Good weldability and machinability.
Components, density and hardness performance
| Level | Nominal tungsten content, weight % |
Density，g/cm3 |
Hardness AB, Rockwell C (largest) |
|
1 |
90 |
16.85～17.25 |
32 |
|
2 |
92.5 |
17.15～17.85 |
33 |
|
3 |
95 |
17.75～18.35 |
34 |
|
4 |
97 |
18.25～18.85 |
35 |
| A. Other hardness testing methods can be adopted if there are stipulations from demanders; B. The hardness of machined or time bond materials can reach Rc46. |
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The lowest requirements on mechanical properties
| Level | Ultimate tensile strength | Yield strength (0.2% residual deformation) |
Elongation ％ |
||
| Kilopound/inch 2 |
MPa |
Kilopound/inch 2 |
MPa |
||
|
1 |
110B |
758 |
75 |
517 |
5B |
|
2 |
110B |
758 |
75 |
517 |
5B |
|
3 |
105B |
724 |
75 |
517 |
3B |
|
4 |
100 |
689 |
75 |
517 |
2B |
| A. Measure by an extensometer with the accuracy of lower than 0.5%. B. 1/2/3-level nonmagnetic materials have the lowest ultimate tensile strength of 94 kilopound/inch 2(648MPa); The minimum elongation: level 1 and level 2, 2%; level 3, 1% |
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▲Sports Goods Series Products:
Benchmark of Tungsten Alloy Darts
Tungsten alloy fishing pendant series: bullet type, drop type, round pipe type, semi-drop type, cylindrical holed type
Tungsten bead and tungsten ball series: φ1.5mm -φ10mm, accuracy: ±0.01mm, application to fishing pendant counterweights, cluster bombs, medical instrument counterweights, sporting gun shots; φ0.1mm-φ10mm, accuracy: ±0.1mm, application to petroleum drilling balances, sporting gun shots.
▲Counterweight Products
High-density tungsten-based alloycounterweight series: balance weights for machinery; flyweights; petroleum drilling counterweight rods; dart rods; golf counterweight blocks; racing counterweight blocks; mobile phone and game machine vibrators; gyroscopes for aerospace; clock pendulum bobs; balance weight balls; anti-vibration cutter rods.
▲Medical Instruments
Medical tungsten alloy ray shielding material series: 1,tungsten alloygrating blades; 2,tungsten alloyprotection tanks: application to radioactive shielding walls in medical treatment; shielding needle pipes: application to medical radioactive liquid shields; tungsten alloy memories: application to tanks, boxes and other containers for storing radioactive substances; 3,collimators: collimators for tungsten alloy series inspection container systems in the application of medical linear accelerators and nuclear technologies; Co60: shielding of other radiation.
▲Electric Appliance Material
Electrodes for EDM and electrodes for electric resistance welding; high-specific-gravity electric contacts, contacts in air circuit breakers.
▲Military Products
Armour-piercing bullets; cluster bombs, balls, bars, square beads and cylinders; other tungsten alloyelectric rammer blocks; tungsten alloy in applications of nuclear technologies.
▲High-specific-gravity Alloy Heat Sink Material
With high-temperature resistance and good heat dissipation performance, high-specific-gravity tungsten alloy materialshave been started to be used as heat sink materials in quantity in various computer CPUs of the electronic industry at present.
Related Products
Specializing in tungsten, molybdenum and its alloy products deep production and processing as well as vacuum furnace and target manufacturing of high-tech enterprises
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