wholesale customized 99.95 % pure tungsten bars
| Machining | Diameter | Diameter tolerance % | Max length, mm |
|
Forging, Rotary swaging |
1.6-20 |
±0.1 |
2000 |
| 20-30 |
±0.1 |
1200 | |
| 30-60 |
±0.1 |
1000 | |
| 60-70 |
±0.2 |
800 |
Note: Your special request for wholesale customized 99.95 % pure tungsten bars will be available.
High melting point (3410°C)
Low thermal expansion
High electrical resistance
Low vapour pressure
Good thermal conductivity
High density
| 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] |
1.Material: tungsten
2.Purity:>=99.95%
3.Dia: 0.8mm Min
4.Surface: black,sintering,polishing,machining
Chemical Composition
| Element | Mo | Mg | Fe | C | Al | N | Si | Ca | Ni | C | |
| Concentration(%) | 0.01 | 0.003 | 0.005 | 0.005 | 0.002 | 0.003 | 0.005 | 0.005 | 0.003 | 0.008 | |
| Purity(Metallic Base) W≥99.95% | |||||||||||
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
