Tungsten, also called Wolfram, is a steel-gray colored metal found in nature. The name Tungsten comes from the swedish language where "tung" means heavy and "sten" means rock. 

Tungsten is most famous for it's physical properties. It has the highest melting point of all metals and high strength at high temperatures.

Tungsten is often used for it's good conductivity for heat and electricity as well as for it's high absorbation capacity for radioactive radiation and X-rays.

Tungsten is found principally in one of two forms viz combined with iron and manganese oxides, which is called wolframite WO₄ or combined with calcium as calcium tungstate which is called scheelite, CaWO₄, the later being the most common. The tungsten compounds seldom exeed 2 % of the orebody.
 

Product datasheet

By adding rhenium to tungsten it is possible to further enhance the caracteristics of pure tungsten. Tungsten-rhenium shows even higher strength, lower brittle-ductile transition temperature and increased ductility. 

Advantages compared to pure tungsten
 - lower transition temperature from brittle to ductile condition
 - no brittleness in recrystallized condition
 - higher recrystallization temperature
 - higher thermal stability  

LUMA Wire qualities, tungsten-rhenium
860
Is an alloy wire of tungsten and 3% rhenium (Re). In comparison with the pure tungsten wire it has superior hot strength, and vibration strength, a higher recrystallization temperature, greater specific resistance and greater tensile strength.
861
Is a wire of 860 standard quality which has passed the requisite tests to meet the demands for wire of a higher standard. 

Product datasheet

For some applications molybden wire has to be plated to meet special requirements. This may for instance be to protect the wire from corrosion or to solder it together to other metals.

Wire qualities, gold plated molybdenum
710
Is luma standard quality containing minimum 99,9 % mo. 


Product datasheet

For some applications brass wire has to be plated to meet special requirements. This may for instance be to protect the wire from corrosion or to solder it together to other metals.

Luma gold plated brass wire has as standard a coat thickness corresponding to 4+1 % of the wire weight up to wire diameters of 50 microns. For wires above 50 microns in diameter the coat thickness is 0,5 micron.

For some applications copper wire has to be plated to meet special requirements. This may for instance be to protect the wire from corrosion or to solder it together to other metals.

Luma gold plated copper wire has as standard a coat thickness corresponding to 4+1 % of the wire weight up to wire diameters of 50 microns. For wires above 50 microns in diameter the coat thickness is 0,5 micron.

The generic term for grades of steel that contain more than 10% chromium, with or without other alloying elements. Stainless Steel may also have varying additions of Nickel, Molybdenum, Titanium, Niobium and other elements.

Stainless steel maintains its strength at high temperatures, and is easily maintained.

For some applications Stainless steel wire has to be plated to meet special requirements. This may for instance be to solder it together to other metals.

Luma gold plated copper wire has as standard a coat thickness corresponding to 4+1 % of the wire weight up to wire diameters of 50 microns. For wires above 50 microns in diameter the coat thickness is 0,5 micron.