• Tungsten Screws

Tungsten Screws

Brand RAYCHIN

Product origin China

Delivery time 5-35 DAYS

Tungsten screws are known for their extreme high density; because of this unique attribute, they are often used for balancing rotating parts. Tungsten’s high mass also makes these screws radiopaque. This allows tungsten screws to block radiation and show up well on x-rays – even better than lead. Another unique attribute of tungsten is its extrmely high melting point of 3420°C. The high temperature stability of tungsten screws make them ideal for some of the hottest vacuum furnace environments.Beyond their high mass and temperature stability, tungsten fasteners are also very corrosion resistant.
Tungsten fasteners are usually made from tungsten alloys per ASTM B777, and range from 90% to 97% pure tungsten, alloyed with nickel and copper or nickel and iron.

Tungsten Screws

Tungsten Screws



Tungsten screws are known for their extreme high density; because of this unique attribute, they are often used for balancing rotating parts. Tungsten’s high mass also makes these screws radiopaque. This allows tungsten screws to block radiation and show up well on x-rays – even better than lead. Another unique attribute of tungsten is its extrmely high melting point of 3420°C. The high temperature stability of tungsten screws make them ideal for some of the hottest vacuum furnace environments.Beyond their high mass and temperature stability, tungsten fasteners are also very corrosion resistant.

Tungsten fasteners are usually made from tungsten alloys per ASTM B777, and range from 90% to 97% pure tungsten, alloyed with nickel and copper or nickel and iron.



Ultra-high density & high temperature / strength stability

· Very high density of 19.3 gm/cc

· Radiopaque to x-rays and other radiation

· High strength at extreme high temperatures (vacuum)

· Excellent corrosion resistance

· Mechanical properties of tungsten screws

· Tungsten material datasheet

Applications

· The aerospace industry depends on the tungsten screws for their combination of high density and mechanical strength which allows them to reduce the physical size of components, offering greater control of weight distribution for propellers, inertial systems and fluid control systems to name a few.

· The heat treating / furnace industry uses tungsten screws in high temperature vacuum furnaces due to tungstens great high temperature strength & stability.

· The oil & gas industry uses tungsten screws for radiation shielding properties to protect equipment used in oil and gas detection, as well as down hole logging for density and ability to withstand intense hydrostatic pressure

· Tungsten screws also play a role in the medical community for their low magnetic properties as well as their radiopaque properties.

Resources: Tungsten Torque Specs

Tungsten Screw Types:  Button Head Cap ScrewsFlat Head ScrewsHex Head Cap ScrewsPan Head, Set ScrewsSocket Head Cap ScrewsTamper Resistant Security Screws




Tungsten Chemistry & Specifications


Tungsten Specifications: ASTM B777, Mil Spec T-21014D

Tungsten Alloy

ASTM-B777

Class 1

Class2

Class 3

Class 4

CP Tungsten

Material Composition

90% W

6%Ni

4%Cu

92.5% W

5.25% Ni

2.25% Fe

95% W

3.5% Ni

1.5% Cu

97% W

2.1% Ni

0.9% Fe

99.95% W

Density

17 gm/cc

17.5 gm/cc

18 gm/cc

18.5 gm/cc

19.3 gm/cc

Density; Ibs/in3

0.6

0.6

0.7

0.7

0.697

Mil. Spec. T-21014 D

Class 1

Class 2

Class 3

Class 4


Type

Type II & III

Type II & III

Type II & III

Type II & III


Hardness; Rockwell C

24.0

26.0

27.0

28.0

31.0

Ultimate Tensile

Strength; PSI

94,000

110,000

94,000

100,000

142,000

Yield Strength, .2% Offset; PSI

75,000

75,000

75,000

75,000

109,000

Modulus of Elasticity; PSI

40X10E6

47xlOE6

45 x10E6

53 X10E6

58x10E6

Coefficient of Thermal Expansion x

5.4

4.6

4.4

4.5

4.2

Electrical

Conductivity; %IACS

14

13

16

17

18



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