2013-08-31

Why Choose ASTM B 777-99 for Tungsten Alloy Radiation Shielding

 Tungsten alloy radiation shielding could be manufactured as per ASTM B777-99 Standard:

1.tungsten alloy specifications cover the requirements for four classes of machinable,high-density tungsten base metal produced by consolidation of metal powder mixtures of which the composition is mainly tungsten alloy specifications. Different tungsten alloy specifications have different uses, we can provide all kinds of tungsten alloy specifications according to your requirements.This material specification may be used for bare parts or be used for parts that may be coated with other materials for protection against corrosion and abrasion.

2. Intended Use -Parts made from this material are intended for uses such as weights or counter-balances in static or dynamic balancing high-speed rotating inertia members, radiation shielding, hypervelocity impact, and vibration-damping applications. We could make products of tungsten alloy grades as your special properties of tungsten heavy alloy.

3.Special Applications -different products of tungsten alloy specifications have different applications, properties or requirements may be important. These alloys may contain elements that make them magnetic. Class 4 is not available in a non-magnetic grade. For purposes of this specification, non-magnetic characteristics of tungsten alloy specifications are defined as material having a maximum magnetic permeability of 1.05. Also for special applications involving large sections, methods for determining internal quality, such as mechanical tests on specimens from these larger sections or suitable nondestructive tests may be applied. If required, these additional tests shall be specified in the purchase order. We can offer many tungsten alloy specifications with the standard size as well as design mould especially for you.



Why Choose AMS-T-21014 for Tungsten Alloy Radiation Shielding

Chinatungsten can offer many tungsten alloy standards within the standard size or we can design and manufacture a mould especially for you. Since different tungsten alloy standards have different applications, we can also make products of tungsten alloy standards as special properties of tungsten heavy alloy, such as AMS-T-21014, which required the tungsten alloy parts having high density, good radiation absorption, well wearing resistance,etc.


Tungsten Alloy Radiation Shielding Grade-2

Here is grade for tungsten alloy radiation shielding:

AMS-T-21014

AMS-T-21014
Class 1
Class 1
Class 2
Class 2
Composition
90W7Ni3Fe
91W6Ni3Fe
92W5Ni3Fe
93W4Ni3Fe
Density (g/cm3)
17.1±0.15
17.25±0.15
17.50±0.15
17.60±0.15
Heat Treatment
Sintering
Sintering
Sintering
Sintering
Tensile Strength (MPa)
900-1000
900-1000
900-1100
900-1100
Elongation (%)
18-29
17-27
16-26
16-24
Hardness(HRC)
24-28
25-29
25-29
26-30


AMS-T-21014
Class 3
Class 3
Class 4
Composition
95W3Ni2Fe
96W3Ni1Fe
97W2Ni1Fe
Density (g/cm3)
18.10±0.15
18.30±0.15
18.50±0.15
Heat Treatment
Sintering
Sintering
Sintering
Tensile Strength (MPa)
920-1100
920-1100
920-1100
Elongation (%)
10-22
8-20
6-13
Hardness(HRC)
27-32
28-34
28-36

Tungsten Alloy Radiation Shielding Grades-1

Here are the grades for tungsten alloy radiation shielding:

ASTM B 777-99 

Class
1
2
3
4
Tungsten Nominal %
90
92.5
95
97
Density (g/cc)
16.85-17.25
17.15-17.85
17.75-18.35
18.25-18.85
Hardness (HRC) Max
32
33
34
35
Ultimate Tensile Strength ksi
110
110
105
100
Mpa
758
758
724
689
Yield Strength at 0.2% off-set ksi
75
75
75
75
Mpa
517
517
517
517
Elongation, %
5
5
3
2  

Tungsten Alloy Magnetic Radiation Shielding

Tungsten magnetic radiation shielding of 70 mm dia. is usually used for radiation protection.

Density: 18-18.5 gms/cc

Composition:95%W~97%W

Sizes: Custom made



2013-08-15

Tungsten Alloy Radiation Protection System

Tungsten alloy radiation protection system is a patented totally encapsulated shielding system. It’s unique formulation gives flexible shielding in inaccessible and restricted applications where traditional methods of shielding are difficult to provide, which is available in flat sheets of special sizes and guide tube shields of standard and custom lengths.


2013-08-12

Tungsten Alloy Shielding is Better Than Lead

Tungsten alloy shielding is more an more popular for radiation protection. Generally speaking, the absorption rate of X-rays and gamma radiation is directly proportional to the density of the shielding material, as tungsten alloy has a high density but small capacity, tungsten is a suitable for radiation shielding. Since tungsten alloy is denser than lead, these alloy can be up to one and a half times more effective than lead, and provide extremely efficient protection from radiation sources, especially in applications where space is limited.

Tungsten alloy shielding for radiation protection.