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Specialty Wire Products

Bare Wire Products

Packaging Information

Precious and Specialty Metals

MWS inventories pure gold, silver and platinum from 16 AWG and finer, in addition to ribbon and flat wire. These precious metals can also be insulated and produced in Multifilar®, Microsquare™ and Twistite™ constructions. Refractory metals, Tungsten and Niobium, are available from stock at .020" and finer.



Properties

METAL Gold Niobium Platinum Silver Tungsten
ATOMIC SYMBOL Au Nb Pt Ag W
MELTING POINT (°C) 1064 2468 1769 962 3410
DENSITY (lbs./in.³) .698 .310 .775 .379 .695
COEFFICENT of LINEAR
THERMAL EXPANSION
@ (X 10 ‾
6 / K)
14.2 7.2 8.9 18.9 4.5
THERMAL CONDUCTIVITY
@ 0°C (W / (m x K))
317 52 71 418 173
ELECTRICAL RESISTIVITY
@ 20°C (Ω/circ. mil/ft)
13.31 78.80 63.91 9.56 33.08
TEMPERATURE COEFFICIENT of RESISTANCE ( 0 - 100°C ) .00372 .0026 .00393 .00382 .0046
ANNEALED TENSILE
STRENGTH (kpsi)
30 - 32 30 - 40 18 - 24 18 - 27 350 - 450


Characteristics of Specialty Metals

Niobium Also known as columbium, niobium has good resistance to chemical corrosion and has been used in applications where the extreme inertness of tantalum is not required and economy is important. Niobium is commonly alloyed with tungsten and tantalum to produce metals with excellent mechanical properties at high temperatures. When alloyed with titanium, niobium becomes useful in applications in the field of superconductors. As a result of its 2468°C melting point, niobium is classified as a refractory metal.

Platinum The platinum group of metals have many diverse uses in both high technology and commercial products. Some applications include electrical contacts, catalysts, glass sealing, thermocouple and resistance thermometer elements, electrodes, furnace windings, dental alloys, as well as water purification and food processing equipment. Platinum is classified as a precious metal.

Tungsten Used in a variety of lamp, electronic tube and electronic furnace applications, tungsten wire is supplied in a cleaned and straightened non-sagging condition or alloyed with thoria or rhenium. Pure tungsten's melting point is 3410°C which is the highest of all metallic elements. Tungsten's extremely high tensile properties make it attractive for a variety of high temperature mechanical applications. Tungsten is classified as a refractory metal.

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Headquartered in Westlake Village, California USA, MWS inventories more than 50,000
Magnet and Specialty wires along with production facilities for drawing, shaping, serving,
twisting and insulating of wire for high-technology users worldwide.

Established in 1968