| 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] |
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
