Nickel also belongs to the group of transition metals. It is hard and ductile. Nickel is considered as corrosion resistant, but oxidises slowly at room temperature. It is also one of the four elements that are ferromagnetic at room temperature. It is an important element in the production of alloys, about 68% of the world’s stainless steel uses nickel.
Nickel plays an important role in the biological development of certain plant species. It is used in batteries like nickel-cadmium (rechargeable batteries) and nickel-metal hydride batteries use din hybrid vehicles. Economically nickel is sourced from iron ore limonite. Iron Ore limonite contains approximately 1-2% nickel of the total weight. Nickel is used for plating brass, and coating chemistry equipment. Nickel is also used as a catalyst for hydrogenation, cathode in batteries, and for metal surface treatment. Nickel is used in many known commercial and consumer products like coinage, alnico magnets, rechargeable batteries, microphone capsules, and plumbing, as well as piping fixtures. It is also used in special alloys like elinvar, permalloy and invar. Nickel is used in alloy metals to increase tensile strength, toughness and ductility.