Tungsten Rods

Parameters

Type and Size:

Diameter (mm) Length (mm)
Ø2.0 – 20.0 2000
Ø20.0 – 30.0 1800
Ø30.0 – 70.0 1500
Ø70.0 – 100.0 1200

Main Characteristics:

High melting point (3410°C)

Low thermal expansion

High electrical resistance

Low vapour pressure

Good thermal conductivity

High density

Tungsten rod Availability

Tungsten rod is manufactured as random length pieces or cut to customers' desired lengths.

Other, closer tolerances can be quoted on request.

In addition, there are three different surface processes or finishes which are provided, depending upon the desired end use.

Tungsten rod Surface Finish

Black - Surface is "as swaged" or "as drawn"; retaining a coating of processing lubricants and oxides.

Cleaned - Surface is chemically cleaned to remove all lubricants and oxides.

Ground - Surface is centerless ground to remove all coating and to achieve precise diameter control.

Tungsten content: 99.95% 

Size: 2.0mm~100mm diameter  Length: 50-2000mm 

Atomic number 74
CAS number 7440-33-7
Atomic mass 183.84 [g/mol]
Melting point 3420 °C
Boiling point 5555 °C
Density at 20 °C 19.25 [g/cm3]
Crystal structure Body-centered cubic
Coefficient of linear thermal expansion at 20 °C 4.4 × 10-6 [m/(mK)]
Thermal conductivity at 20 °C 164 [W/(mK)]
Specific heat at 20 °C 0.13 [J/(gK)]
Electrical conductivity at 20 °C 18.2 × 106 [S/m]
Specific electrical resistance at 20 °C 0.055 [(Ωmm2)/m]

Quality&Inspection

Applications

Parts of electric light source and elctron tube
Heat elements of high temperature furnace
Structures of high temperature furnace
Contact of electrical appliance
Rare earth industry
Vacuum coating industry

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