**(Pure Tungsten Should Be Machined By Wire EDM Only)

Tungsten Forms Available

Tungsten wire, tungsten rod, tungsten bar, tungsten strip, tungsten foil, tungsten sheet, tungsten plate, tungsten powder, tungsten tubing, tungsten blanks, tungsten semi-finished and custom finished tungsten parts.

Machining Tungsten

Tungsten can be very difficult to fabricate because of its high hardness and low ductility.  Tungsten is a strong, hard, crack-sensitive metal that is usually brittle at room temperature. It requires special handling and skill beyond that necessary for most metals and alloys.  It is important to remember when working with Tungsten is that it must be cut or formed at temperatures well above its transition temperature.  Failure to do this may result in cracking or lamination.  Care should be taken to insure that the metal remains at this temperature throughout the entire forming process. The use of cold tooling which rapidly chills the metal can be as harmful as not preheating the material.  The best method for machining that involves metal removal is E.D.M.  The following conventional methods can also be used with great care:  Grinding, forming, joining, milling, riveting, spinning, stamping, and turning.

ToolsCarbide H(2)
Clearance angle
Back Rake27°
Side Rake
Cutting Speed132 ft per minute
Nose Angle90°
Nose Radius
Grinding (Use aluminum oxide or silicon carbide wheels with medium hardness.)
Wheel Typesilicon carbide; hardness j to l ; gram size 100-120
Speed12 ft per second
Milling (When milling Tungsten, the following is recommended)
Cutting speed73 feet per minute
clearance angle
side rake10°
Forming (When spinning, bending or stamping note the following)
Temperature1000° – 1500° F

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