ASTM B777 WNiCu Machined Tungsten Heavy Alloy Bars
Tungsten Heavy Alloy Bars have high density, high strength, high
hardness (known as 3 H alloy) and good ductility, electrical
conductivity and thermal conductivity. Because of its comprehensive
excellent performance, it plays an important role in weapon
manufacturing, and then it is widely used in the national defense
industry, aerospace and civil industry, such as the electrical
industry, drilling industry, etc. High proportion tungsten alloy
material has become a kind of dual-use alloy material that attracts
much attention.
SPECIFICATION & CHEMICAL COMPOSITIONS (NOMINALS)
| Chemical Composition | 90%W | 93%W | 95%W | 97%W |
| State | Sinter | Vacuum | Forge | Sinter | Vacuum | Forge | Sinter | Vacuum | Sinter | Vacuum |
Density
(g/cc) | 16.85-17.25 | 17.15-17.85 | 17.75-18.35 | 18.25- 18.85 |
Hardness
(HRC) | 32 Max | 30 Max | 40 Min | 33 Max | 31 Max | 40 Min | 34 Max | 32 Max | 35 Max | 33 Max |
| Tensile Strength (Max) | 770 Min | 900 Min | 1400
Max | 770 Min | 910 Min | 1440 Max | 735 Min | 920 Min | 700 Min | 850 Min |
Yield Strength
(Mpa) | 620 Min | 620 Min | 1280 Max | 650 Min | 650 Min | 1340 Max | 650 Min | 650 Min | - | - |
Elongation
(%) | 5 Min | 15 Min | 5 Min | 5 Min | 12 Min | 3 Min | 3 Min | 12 Min | 2 Min | 6 Min |
Tungsten Heavy Alloy Bars Picture:
Introduction and characteristics of Tungsten Heavy Alloy Bars
The tungsten content in tungsten heavy alloys varies from 90% to
98%, which is responsible for their high density (16.5 to
19.00g/cc). Nickel, iron and/or copper are used as a metal binder
base to hold the brittle tungsten particles together, making the
tungsten alloy malleable and easy to work. Nickel-iron is the most
commonly used additive, with a ratio of 7Ni:3Fe or 8Ni:2Fe (weight
ratio).
Common processes for preparing tungsten heavy alloys include mixing
the desired amount of tungsten, iron, nickel or copper powder and
then cold pressing and liquid phase sintering to almost full
density. During the liquid phase treatment, the matrix tungsten
alloy melts and brings some tungsten into the solution to form a
microstructure through which large tungsten particles (20 -- 60μm)
are dispersed in the matrix alloy.
Application of Heavy Tungsten Heavy Alloy Bars
In order to increase the kinetic energy of projectile core and
enhance the ability of piercing armor, the application of high
specific gravity tungsten alloy is a successful technical measure
in the design and development of shell piercing projectile abroad.
At present, in addition to the United States, many countries in
Western Europe have adopted tungsten alloy projectile core
materials.
