The common processes used to shape tungsten rod are swaging and continuous rolling. Rotary swaging is a hammering process to forge rod. The sintered billets need to be heated to 1400 – 1600°C in a hydrogen atmosphere and then deformed to rod shape by rotary forging on different types of swaging machines.  Continuous rolling by Y type triple roll mill is a more advanced process than swaging since it has a higher production efficiency and achieves a better homogeneous microstructure.

We offer two types of tungsten rods– black rod and ground rod. The black has a thin layer of oxide adhering to the finished rod. The ground tungsten rod is further processed by passing through the grinding machine which removes the black oxidant coating. We also offer the centerless grinding surface for tungsten rod with a diameter less than 1.6″. CHEMETAL USA is dedicated to researching and developing qualified pure tungsten rod products.

Tungsten Rod Specification

Rod Diameter
Centerless Ground Rod 0.029″ (0.75mm) – 1.574″ (40 mm)
Ground Rod0.029″ (0.75mm) – 5″ (127 mm)
Rod Length
Various lengths available upon the special diameter
PurityW≥99.95%
Rod SurfaceGround, Polished

As an ISO certified tungsten rod products manufacturer, CHEMETAL USA is capable of offering various types of Tungsten rod,Tungsten heavy alloy rod, Tungsten Nickel Iron Alloy (W-Ni-Fe) rod,Tungsten Nickel Copper Alloy (W-Ni-Cu) rod, Copper Tungsten (W-Cu) rod that all meet a consistently high standard of diameter tolerance, roundness, straightness. and machinability.

Tungsten Rod Sizes

FormSize InchSize InchSize InchSize InchSize Inch
Rod0.030.250.571.02
1.33
Rod0.05
0.26
0.581.031.5
Rod0.06
0.29
0.6
1.04
1.6
Rod0.07
0.3
0.68
1.06
1.9
Rod0.1
0.31
0.7
1.07
2
Rod0.11
0.34
0.71
1.08
2.1
Rod0.12
0.35
0.78
1.09
2.2
Rod0.14
0.36
0.87
1.22
2.9
Rod0.15
0.37
0.88
1.23
3
Rod0.16
0.4
0.89
1.25
3.3
Rod0.18
0.41
0.9
1.27
3.8
Rod0.19
0.52
0.91
1.28
4
Rod0.2
0.53
0.92
1.3
4.2
Rod0.21
0.54
1
1.31
4.4
Rod0.24
0.55
1.01
1.32
5
Rod Diameters are drawn on prior sales. Please contact us for additional availability.

CHEMETAL USA specializes in the manufacturing of tungsten rod. We understand that top-quality control is essential to produce products that satisfy our clients. Thus, we have placed a great deal of emphasis on monitoring every step from the beginning of the forging process to the end of the inspection. Hot Isostatic Pressing ensures our tungsten rods obtain a high density and fine grain size. These two properties are critical to the components fabricated with the rods since it will help the components have a long service lifespan. The ground rod has no cracks, burrs and oxidation phenomenon on its surface. Our pure tungsten rod is also heat treated and thoroughly checked with NDT in order to identify and eliminate the crack lines, pores and various other defects. Additionally, the forging process refines the grain structure and improves the rigidity. Thereby, tungsten rod is an ideal material to make thermal conductors, welding electrodes, headpieces for the industries of quartz, stirring bars for smelting, heavy hammers, fasteners, etc.

Tungsten Rod Applications And Properties

Tungsten Inert Gas (TIG) Welding

The extremely high melting point of tungsten rod makes it very well-suited to be machined into tungsten electrodes for GTAW and plasma welding. GTAW stands for Tungsten Inert Gas Welding, which is also called Heliarc welding. During the welding process, the tungsten electrode gets heated but doesn’t melt. Tungsten electrode is mostly non-consumable, meaning only a negligible amount of tungsten is consumed during each use.

Stirring Bars For Rear-earth Smelting

The stirring bar used for rare earth metal production by molten salt electrolysis needs to be highly resistant to high temperature and chemical erosion. Tungsten rod is an excellent material for making the stirring bar due to its high melting point and very stable chemical properties in a working temperature below 1400 °C. Compared with graphite, tungsten rod has a lower consumable rate and higher erosion resistance to the electrolyte.

Tungsten Contact

Tungsten contact is a popular component cut from forged tungsten rod. It is widely used in high voltage and frequency switching operations such as circuit breakers, high voltage switches, and arcing contacts. Tungsten contact has a low surface evaporation rate, excellent arc resistance, and efficient electrical and thermal conductivity. The typical size of tungsten contacts are 2- 6 mm in diameter with a maximum 0.6 mm in thickness.

Tungsten Rod Applications

  • Furnace pillars for sapphire crystal furnaces and other vacuum furnaces
  • Furnace heater for sapphire crystal furnaces and other vacuum furnaces
  • Tungsten headpieces for the industries of quartz
  • Stirring bars for glass smelting and rear-earth smelting
  • Tungsten heavy hammers
  • Connecting rods
  • Screws/bolts and other fasteners
  • Furnace support pillars
  • Electrodes for welding electrodes and rare earth metal industry

Tungsten Rod Properties

  • High Density: 19.25 g/cm³
  • High Melting Point: 3422°C (6192 °F)
  • Low Vapor Pressure
  • High Tensile Strength
  • Low Coefficient of Thermal Expansion
  • Low Electrical Resistivity
  • Good Machinability
  • High Absorption Capacity
  • High Elastic Modulus

Tungsten Alloy Rod

Rod Diameter
Centerless Ground Rod 0.029″ (0.75mm) – 1.574″ (40 mm)
Ground Rod0.029″ (0.75mm) – 5″ (127 mm)
Rod LengthVarious lengths available upon the special diameter
SurfaceGround, Chemical Cleaned, Polished
StandardMil-T-21014,  AMS-T-21014, ASTM B 777
CompositionW Ni Fe, W Ni Cu, W Cu

We are also able to provide a fast lead time and handle large-volume contracts.CONTACT US and download our PRODUCT CATALOG to learn more about our Tungsten products.

Tungsten Alloy Rod Properties

CHEMETAL USA is a leading producer of tungsten heavy alloy rods including tungsten nickel iron alloy (W-Ni-Fe) rod, tungsten nickel copper alloy (W-Ni-Cu) rod. We offer tungsten heavy alloy rods with diameters ranging from 0.029″ to 4.0” or more. Tungsten heavy alloy rod contains tungsten content ranging from 80%-98% with small amounts of molybdenum, nickel, iron and copper elements. We can cut tungsten rod into varying lengths depending on the diameter of the rod chosen by the customer. Two surfaces tungsten rods have are polished and ground.

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