Thursday 8 October 2009

Metals

Metals

Types Of Metals

the range of metals are classifeid as Non Ferrous and Ferrous

Metals can then be seperated under these headings into Alloys and Non Alloys

Ferrous Metals: Metals that contain iron and carbon

Non Ferrous: Metals that do not contain Iron

Ferrous Alloys: Mixture of two metals, atleast one of the metals contains iron and carbon

Non Ferrous Alloys: Mixture of two metals that do not contain carbon or iron

Ferrous: Mild Stell; Strong and cheap, can rust ( car bodies and white gold)

High Carbon Steel; Harder than mild steel, hard to work and can rust (drills and files)

Cast Iron; Hard, Brittle under impact ( brake discs, engines)

Non Ferrous: Aluminium; Leightweight, cheap, rusts easily ( car bodies, screws, nuts)

Brass; Strong, ductile, looks good ( door furniture, door nobs, electric parts)

Copper; Soft metal, good conductor of electricity ( wires, pipping)

Ferrous Alloys:Stainless Steel
High Speed Steel
Die (tools) Steel

Non Ferrous Alloys:Brass
Bronze
Duralumim

Gold is the only metal that is extracted and usable without processing, all other metals are from ores

Common Metal Ores:
Iron
Copper
Aluminium
Lead
Tin
Zinc

25% of the earth crust is made up of metal ores, Aluminium is the most common followed by iron

The rarer the metal the more expensive

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