Although Nickel is a metal that includes expensive because of the difficulty of purification processes as well as the relative size of the levels contained in Nickel Nickel ore, but because it is a very specific nature, especially its resistance to corrosion is very high then Nickel has a very important role as one of the techniques in use used either pure or as an alloying element. Nickel such influence in its use as an alloying element, as well as various types of metals can be combined with the element Nickel.
1. Nickel-Iron Alloy
Nickel alloys with iron are used when necessary to control the low or medium Thermal expansion coefficient her; eg precision machining, metal seals and thermostats glasses on. For this purpose we identify in a trade with the brand “Nilo”
Nickel iron alloy with levels between 36 and 50%, Nilo-36 which is an alloy of iron with Nickel content of 36%, In this alloy expansion coefficient almost did not happen at normal temperatures so it is widely used in standard sizes, measuring tape, the pendulum rod and equipment machine precision. This material is also used on the thermostat with a working temperature above 1000C.
Nilo Nilo 40 and 42 is alloyed with Nickel content of 40% and 42% used material sebagaiu thermostat for electric and gas ovens cook, Nilo 42 has a shape similar to the core-Clad Copper wires are used as seals on envelopes of gas and light bulbs, radio valves as well as television tubes.
Nilo Nilo 48 and 50, the levels of Nickel alloys with 48 and 50% of usage is as a sealing material in the soft glass valves tube radio and television equipment. Iron alloy with 29% Nickel and 17% Cobalt (Nilo-K) equals expansinya Medium Hard-of Borosilicate Glasses are used for packaging of high-power special velves to Glassto metal sealer on the X-ray tube and nomerius electrical component.
2. Molybdenum Nickel Alloys
This alloy has corrosion resistance properties of the Nickel content and low iron levels can be increased by adding the element Molybdenum. Coronel is a special type of alloy Wrought alloys are included in this type, with levels of 66% Nickel, 28% and 6% Molybdenum Iron.
Its properties can be controlled through cold working process, but with a tensile strength of 930 N/mm2 and 250 HV hardness number is indeed too hard where the material has been carried out annealing, but if necessary voltage and higher hardness could be enhanced by extending the heating time at temperature of 7500C and will produce up to 350HV hardness numbers although this is rarely done.
3. Nickel-Copper Alloys
Nickel and Copper in solid solution are in all comparisons (see diagram Nickel copper alloy balance on page 24), where it will produce alloy alloy
Wrought Copper-Nickel that can be obtained in the form of the results of casting (Cast), flat bar, pipe, wire rod and pieces.
Monel alloy is a material whose composition consists of 66 5 Nickel, 33% Copper and Manganese 2%. This alloy has a tensile strength up to 840 N/mm2 with hardness up to 200HV which beregantung on the length of the dissolution process by way of deposition, so that the tensile strength of the heat treatment process can mmelalui 1500 N/mm2 with numbers up to 340 HV hardness. These alloys are traded under the name of K-Monel.
Monel is very resistant to attack by acids and alkalis, gas and sea water as well as tegangannnya be increased by the effect of high temperatures. Alloys of this type are used in the parts of the pump, the steam turbine blade, shaft profelle.