Metals that Can Be Electropolished

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Most metals can be electropolished successfully, but the best results are obtained with metals with fine grain boundaries that are free of non-metallic inclusions and seams. Those metals having a high content of silicon, lead or sulfur are usually troublesome.

Stainless steel electropolishing the most frequent alloy electropolished, and all alloys can be processed. Castings will polish to a bright finish but not to the same brightness or smoothness produced by wrought alloys.

Most Commonly Electropolished Metals Include:

  • 304 Stainless Steel
  • 316 and 316 L Stainless Steel
  • 400 Series Stainless Steels
  • 17-4 pH
  • MP35N
  • Nitronic 60
  • Elgiloy
  • 2205 Duplex Stainless Steel
  • Other Duplex Stainless Steels

Other Commercially Electropolished Metals Include:

  • Low and High Carbon Steels
  • Tool Steels
  • High Temperature Alloys (Molybdenum, Nimonic, Waspaloy, Tungsten)
  • Aluminum
  • Titanium
  • Copper
  • Kovar
  • Cupronickel
  • Inconel
  • Brass
  • Columbium
  • Bronze
  • Leaded Steel (Low-Lead)
  • Nickel Silver
  • Beryllium
  • Monel
  • Vanadium
  • Hastelloy
  • Tantalum
  • Beryllium Copper
  • Silver and Gold

Many of the above metals can only be electropolished in large production runs and in controlled environments. This is due to the sometimes-costly set-up, tooling and special environmental and safety equipment requirements associated with many of these processes.

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