History and Types of non-ferrous Metals

History of non-ferrous Metals:

 Bronze Age

The first non-ferrous metals entered man’s life ever since hoary antiquity as gold and copper, as they occur naturally during a native state. Relatively later began the assembly and use of tin and lead and their copper alloys. This period of historical development, directly associated with the assembly of metals and therefore the production of tools from them, is understood because the Bronze Age and is characterized by a rapid development of the material culture of people and important social changes in human society.

Types of non-ferrous Metals:

Following are the types of non-ferrous metals:

1. Lightweight non-ferrous metals – Aluminum, Magnesium, Titanium, etc. with a density of less than 4,500 kg/m3

2. Heavy weight non-ferrous metals – Lead, Copper, Nickel, Tin, Antimony, etc. with a density of more than 4,500 kg/m3

3. Precious metals – Gold, Silver and Platinum metals

4. Rare metals –These include 55 metals from the periodic system of elements having different physical and chemical properties. Most of them are very uncommon in nature and infrequently form independent ores.