Forms & Applications

Wire, Ribbon & Sheet

Most of Sigmund Cohn Corp. metals and alloys are fabricated into wire form, in many cases to as small as .0003" diameter. Frequently round wire is rolled to rectangular cross sections as thin as .0002" with a width-to-thickness ratio of 2:1 to as much as 75:1. Some wire is electroplated with Gold for improved corrosion resistance or with Tin or Lead for improved solderability. In many cases, an insulation is required. An appropriate enamel is applied onto round wire to rigid specifications including enamel thickness, uniformity and temperature rating. Multistrand wire is available, either stranded or braided.


  • Commercial Grade (99.95%) available in wire, ribbon and sheet
  • Reference Grade (99.99%) ribbon and wire only
  • Sheet and foil slit to specifications
  • Ribbon rolled from round wire to minimum .00025" thickness

Platinum Alloys

Sigmund Cohn Corp.'s several families of Platinum Group Metals and Alloys are available in the following forms:

  • Palladium (99.95%) (available in sheet, ribbon and wire)
  • Platinum/Palladium (available in sheet, ribbon and wire)
  • Platinum/Gold/Iridium (available in sheet, ribbon and wire)
  • Platinum/Iridium - several of these alloys are available in sheet, ribbon, and wire or ribbon and wire; the rest are special order
  • Platinum/Rhodium - these alloys available as wire; ribbon and sheet are special order
  • Platinum/Ruthenium - wire only; ribbon and sheet are special order
  • Platinum #479®: Platinum/Tungsten available in wire and ribbon, sheet by special order
  • Platinum/Molybdenum (available in sheet, ribbon and wire)
  • Platinum/Nickel available in wire and ribbon
  • Platinum #851®: Platinum/Rhodium/Ruthenium available in wire and ribbon


  • In purities of 99.98% or 99.99%
  • Stabilized Bonding Wire in sizes ranging from .0003" diameter to rod stock
  • Sheet and foil slit to specifications
  • Ribbon rolled from round wire to minimum .00025" thickness

Gold Alloys

  • High resistance alloys: L.T.C.® available in ribbon and wire
  • Low resistance alloys: LR 80® available in ribbon and wire
  • Gold-Iron versus Chromel P® thermoelements for cryogenic temperature ranges available in ribbon and wire (Registered trademark of Hoskins Mfg. Co.)
  • Gold/Gallium available in sheet, ribbon and wire
  • 18 Kt Gold available in sheet, ribbon and wire
  • 14 Kt Gold available in ribbon and wire
  • Gold/Antimony available in sheet, ribbon and wire
  • Gold/Platinum available in ribbon and wire
  • Gold/Iron available in wire and by special order in ribbon

Silver & Silver Alloys

  • Silver (99.98%) in wire and ribbon form
  • Alloys of Silver and Copper in several low resistances (available in wire and ribbon)

Base Metal Alloys

The following base metal alloys are available from Sigmund Cohn Corp. in ribbon and wire:

  • Constantan
  • Nickel/Chromium
  • Aluminum/Silicon
  • Aluminum/Magnesium
  • Nickel/Cobalt/Iron
  • Stainless Steel #302
  • Copper/Silver
  • Phosphor Bronze Grade A
  • Phospher Bronze Grade C
  • Beryllium Copper #10
  • Beryllium Copper #25

Specialty Wire

To meet the needs of specific industries, Sigmund Cohn Corp. has developed specialty wire products. The company's Technical Service Group is available to assist customers with custom created solutions to overcome performance challenges.

Electroplated Wire & Ribbon

  • Gold and Tin/Lead electroplated onto base metal wires
  • Plating thickness controlled by milligrams/square inch or weight percent increase

Enameled Wire

Schenectady Chemical's Isonel 200 ® insulations coatings (Registered trademark of Schenectady International, Inc.)

  • Bondable coatings
  • Solderable coatings

Wollaston Wire

  • Special process wire which consists of Silver clad Pt or Pt/Rh
  • Core wire available in diameters as small as .00025"

Temperature Controlled Wire


  • Platinum/Rhodium Platinum wire
  • NBS 561/IPTS-48
  • ASTM E230-72/IPTS-68
  • ASTM E230-93/ITS-90


  • Platinum/Iridium and Platinum/Rhodium wire

Resistance Temperature Detectors

  • Reference Grade Platinum wire
  • Pt 385® resistance wire per DIN 43760
  • Lead wires

Platinum Resistance Thermometer Wire

  • Available in various ranges of TCR
  • .003926 ohm/ohm¡ C (Reference Grade)
  • .003850 ohm/ohm¡ C (Pt 385® per DIN 43760
  • Custom TCRs are available

Targets & Slugs

Closer than commercial tolerances and better than commercial purities, our targets and slugs include precious and base metals and alloys.

  • Discs, cyclinders, washers, rectangles and slugs
  • Gold of 99.99% and 99.999% purity
  • Platinum of 99.95%, 99.99% and, in some cases, 99.999% purity is available for deposition and sputtering use
  • Also available: Palladium at 99.95% purity; alloys of Gold and Palladium, including 70% Gold Palladium; 50% Gold Palladium, and 98% Platinum Tungsten
  • Slugs of up to 1/2" in diameter made to custom length and weight specifications, discs of up to 8" in diameter, wire and sheet
  • Machine shop capabilities for heavy discs, discs with enhanced rims, cylindrical forms, washer configurations and tapered configurations; plus milling capabilities for special geometries


Sigmund Cohn Corp now manufactures seamless tubing in a variety of alloys. Catering to the medical, chemical, temperature sensing, glass/fiberglass, crystal growth, jewelry and aerospace industries, SCC can produce tubing in platinum group metals as well as gold. From platinum and palladium to alloys of platinum/rhodium, platinum/iridium, platinum/ruthenium, and palladium/ruthenium, we can satisfy all your tubing needs as well as providing labware, spun crucibles and other precious metal fabrications.