Tungsten heavy alloy is a kind of alloy using tungsten as matrix and adding a small amount of nickel, iron, copper and other alloying elements, with the characteristics such as: high and adjustable density (~ 18.5g/cm3), good absorption ability of high-energy radiation (1/3 higher than the absorptivity of lead ray), low coefficient of thermal expansion (4 ~ 6×10-6/℃), good plasticity, high strength and elasticity modulus, machinability and weldability.
Tungsten Nickel Copper alloys also has non-magnetic property, which make them extensively used in radiation protection with sensitive environment.
Material Property:
- High Density:Max as 18.8 g/cm3
- High Strength:Tensile strength as 700-1000 MPa.
- Excellent Radiation Protection:Tungsten alloy is 1.7 times than Lead in radiation protection capability with same thickness.
- The Coefficient of Thermal Conductivity: The thermal conductivity coefficient of tungsten alloy is 5 times of die steel.
- Small Thermal Expansion Coefficient: Tungsten thermal expansion coefficient is 4~6×10-6/℃, only iron or steel 1/2-1/3.
- Good Plasticity, Machining and Welding Capability.
- Compared with lead toxicity, tungsten alloy is zero damage of environment. Radiation detectors made by tungsten alloy has no harm to human body.
- Compared with tungsten nickel copper alloy, tungsten nickel iron alloy has ferromagnetic property, and the mechanical properties, processing properties are better than tungsten copper nickel alloy.
- Compared with tungsten nickel iron alloy, tungsten nickel copper alloy has unique performance with non–magnetic environment.
Radiation protection and guidance: Because of its high density (~18.8 g / cm3), and excellent X-ray, gamma ray absorptive capacity, excellent process ability, making Tungsten Nickel Iron alloy become ideal material for radiation therapy collimator and protection components.
Normal Tungsten Nickel Iron Alloy Property
Chemical Component%
Density
(g/cm3)
Tensile Strength
(MPa)
Yield Strength
(MPa)
Elongation
(%)
HRC Max
(HRC)
Magnetic
W Component
NiFe
90
Remain
16.85-17.25
≥758
≥517
≥5
32
Yes
92.5
Remain
17.15-17.85
≥758
≥517
≥5
33
Yes
95
Remain
17.75-18.35
≥724
≥517
≥3
34
Yes
97
Remain
18.25-18.85
≥689
≥517
≥2
35
Yes
High Performance Sintering Tungsten Nickel Iron Alloy Property
Density
Tensile Strength
Yield Strength
Elongation
Hardness
(HRC)
Magnetic
16.85-17.25
900
600
15
≤32
Yes
17.15-17.85
900
600
15
≤33
Yes
17.75-18.35
850
600
10
≤34
Yes
18.25-18.85
800
600
7
≤35
Yes
(g/cm3)
(MPa)
Rp0.2(MPa)
A(%)
Tungsten Nickel Copper Alloy Property
Chemical Component
Density
(g/cm3)
Tensile strength
(MPa)
Yield
strength
(MPa)
Elongation rate
(%)
Hardness
(HRC)
Magnetic
W
NiCu
90
Remain
16.85-17.25
≥648
≥517
≥2
32
No
92.5
Remain
17.15-17.85
≥648
≥517
≥2
33
No
95
Remain
17.75-18.35
≥648
≥517
≥1
34
No