All About Aluminium [हिन्दी] With PDF || Non Ferrous Metals || Material Science ||

Описание: ▪️▪️Introduction To Aluminium

Pure aluminum is a silvery-white metal with many desirable characteristics. Pure aluminum is
soft and lacks strength, but some amount of alloying elements are added to change their
properties. Aluminum is a mineral extracted from the earth's crust, but it is not found free in
nature. It cantain some amount of other elements and impurities. So,The Bayer process is used
to refine
aluminum from bauxite, an aluminum ore.

▪️Characteristics Of Aluminium

1. It is light in weight, nontoxic, nonmagnetic and nonsparking. It is easily formed,
machined and cast.
2. Like copper it is also corrosion resistant.
3. It is very good conductor of heat and electricity although not as good as copper.
4. Possesses high ductility and light weight so widely utilized in aircraft industry.
5. Needs frequent annealing if cold worked since it becomes hard after cold working.
6. It is used in manufacturing of household utensils including pressure cookers.
7. Its melting point is 658 degree celsius.

Applications
1. Door and window frames.
2. High tension power lines, wires, cables, bus bars.
3. Components for television, radios, refrigerators and air-conditioners.
4. Also used for making engine parts, drinks cans, ladders.

▪️▪️Aluminium Alloys:
Aluminium alloys are alloys in which aluminium (Al) is the most important metal. The typical
alloying elements are magnesium, copper, manganese, silicon, tin and zinc.

There are following important Alluminium Alloys:

A. Duralumin (copper, aluminum)
B. Commercially pure aluminium
C. Y-Alloy

▪️Duralumin (copper, aluminum):

Its main alloying element is copper which may be present from 3.5 to 4.5% , 0.8% of
magnesium and manganese and each and about 0.5% of silicon and iron each.

Applications:
It is used in the form of bars, tubes, sheets, wires for aircraft, automobile components, rivets and
other structures .

▪️Commercially pure aluminium:

a. It contains 99% of Al and small amounts of copper, silicon, iron, manganese and zinc.
b. It has an excellent resistance against corrosion.

Applications:
For cooking utensils, decorative assemblies, wires, rivets etc.

▪️Y-Alloy:

This contains
a. 3.5 to 4.5% of Copper,
b. 1.8% to 2.3% of nickel
c. 1.2 to 1.8% magnesium.
It retains its strength to fairly high temp.

Applications:
used for automobile pistons and other aircraft parts.

Click here to download PDF https://drive.google.com/file/d/1CIte...

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