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Guide to Machining Tungsten Alloys

Tungsten Alloy Machining GuideTungsten Alloys* are alloyed with different elements such as nickel, copper, and iron to produce a large variety of grades. Many of these alloys have engineering properties similar to steel and are relatively easy to machine. These alloys can be drilled, milled, turned, and tapped using standard tools and equipment, while using speeds and feeds similar to Grey Cast Iron. Tungsten Alloys can also be plated or painted to enhance their corrosion protection.

Tungsten Alloys have found wide acceptance in applications such as radiation shielding, medical equipment, boring bars, vibration dampening, sporting goods, as well as counterweights in aircraft and racing cars.

TOOLS:
C-2 Grade carbide tooling is recommended. Use as generous a nose radius as possible.

OPERATIONS:
  • Turning/Boring: Positive rake is recommended
    Roughing: 0.050"/ 0.200"
    Depth of Cut: 0.008"/.010" Feed.
  • Finishing: 0.010"/0.030"
    Depth of Cut: 0.003"/0.005" Feed.
  • Turning Speed: 250/350 Surface feet per minute.
  • Note: For above operations, air is the preferred method of cooling tools; coolant can be used.

DRILLING/TAPPING:

  • Drilling: Use Carbide tipped or solid carbide drills with air or coolant such as Molydisulfide cutting fluid. Drill tap holes to 50-55% of thread hole requirement.
  • Tapping: Use straight flute, high alloy taps. For small threaded holes, thread forming taps can be used. Nitrided or solid carbide taps will extend life of tap on long run jobs.

GRINDING:
Use Aluminum Oxide type wheels ("J" grade typical) with coolant to remove grinding material rapidly.

MILLING:
Feeds and Speeds should follow Grey Cast Iron recommendations.
Feeds: 0.003” per tooth as a starting point.
Speed: 75 - 750 sfpm with carbide tools; adjust to depth of cut.
End Milling: Slight “climb” is best starting point.
Note: For above operations, air is the preferred method of
cooling tools; coolant can be used.

EXOTIC OPERATIONS:
Wire EDM; Solid EDM; Waterjet Cutting can be performed on tungsten alloys.

Guide to Machining Tungsten Alloys Download PDF

Refractory Metals and Alloys

Ed Fagan Inc. stocks a variety of refractory metals and alloys for a wide range of applications. EFI carries:
Molybdenum
Vacuum Furnace Molybdenum
TZM Molybdenum
Tungsten
Tungsten Alloy
Tantalum
Niobium
Rhenium

And we also have a large selection of other types of specialty metals and alloys for high technology applications, including:
Controlled Expansion Alloys
Electrical/Electronic Nickel
Soft Magnetic Alloys
Hard to Find Materials