Ferrous - containing of iron, basically the metal compound has a large amount of iron in it giving it the ability to rust.

Non Ferrous - a metal without iron in it, such as stainless, which does not rust.

Alloy - A metal mad by combining two or mor metalic elements, especially to give greater strength or resistance to corrosion.

Iron - Iron is a chemical element with symbol Fe and atomic number 26. It is a metal in the first transition series. It is by mass the most common element on Earth, forming much of Earth's outer and inner core.

Steel - Steel is an alloy of iron and carbon that is widely used in construction and other applications because of its high tensile strength and low cost. Carbon, other elements, and inclusions within iron act as hardening agents that prevent the movement of dislocations that naturally exist in the iron atom crystal lattices.

Aluminum Alloys - There are two principal classifications, namely casting alloys and wrought alloys, About 85% of aluminium is used for wrought products, for example rolled plate, foils and extrusions. Cast aluminium alloys yield cost-effective products due to the low melting point, although they generally have lower tensile strengths than wrought alloys.

Magnesium Alloys - Magnesium is the lightest structural metal. Magnesium alloys have a hexagonal lattice structure, which affects the fundamental properties of these alloys. Magnesium alloys are typically used as cast alloys, but research of wrought alloys has been more extensive since 2003.

Titanium Alloys - Titanium alloys are metals that contain a mixture of titanium and other chemical elements. Such alloys have very high tensile strength and toughness (even at extreme temperatures). They are light in weight, have extraordinary corrosion resistance and the ability to withstand extreme temperatures. However, the high cost of both raw materials and processing limit their use to military applications, aircraft, spacecraft, medical devices, connecting rods on expensive sports cars and some premium sports equipment and consumer electronics.

Zinc Alloys - A widely used alloy that contains zinc is brass, in which copper is alloyed with anywhere from 3% to 45% zinc, depending upon the type of brass. Brass is generally more ductile and stronger than copper and has superior corrosion resistance. These properties make it useful in communication equipment, hardware, musical instruments, and water valves

Copper Alloys - They have high resistance against corrosion. The best known traditional types are bronze, where tin is a significant addition, and brass, using zinc instead. Both these are imprecise terms, both having been commonly referred to as lattens in the past. Today the term copper alloy tends to be substituted, especially by museums.

Nickel Alloys - Nickel comes in many alloys, most common being Nickel-aluminum, Nickel-titanium, and Nickel-chromium.

Lead and Tin Alloys - Lead and Tin Alloys are most commonly used in places that need a metal with a low melting point or that is soft at room temperature. A most common use for Lead is in bullets and industrial paints for lead has does not corrode and adds structure to the paint. Tin is commonly used in circuit boards as solder.

Precious Metals - The best-known precious metals are the coinage metals, gold and silver. Although both have industrial uses, they are better known for their uses in art, jewelry and coinage. Other precious metals include the platinum group metals: ruthenium, rhodium, palladium, osmium, iridium, and platinum, of which platinum is the most widely traded.