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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]

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

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

Keywords

Metal material