propertiesadvdisadvnomenclatuureofal.pptx

properties adv disadv nomenclatuure of al

1. PROPERTIES OF ALUMINIUM It is a very good conductor of heat and electricity. It is a silvery white metal with a bluish tinge and it exhibits bright lusture on a freshly broken surface. It is a Non-magnetic substance. It is highly resistant to corrosion. It specific weight is 2.7g/cm3, which is one third of steel. It is also insoluble in alcohol & water. It is 100% recyclable without any loss of its natural qualities. Aluminium alloys maintain strength at high temperature. Melting point is 660 c and Boiling point is 2500 c. The pure metal is soft, but it becomes strong and hard when alloyed. It can be beaten into extremely thin sheets. Capable of being shaped or bent It has FCC structure. In nature, aluminium is found only in chemical compounds with other elements such as sulphur, silicon, and oxygen. Pure metal aluminium can be economically produced only from aluminium oxide ore. Occurs in all types of clay.

2. A.A . Number 1XXX Aluminum 99.00% (PURE) 2XXX Copper is the main alloying element 3XXX Manganese i s the m a in alloying e l ement 4XXX Silicon is the main alloying element 5XXX Magnesium i s the main alloying e l ement 6XXX Magnesium and silicon are the main alloyin g elements 7XXX Zinc is the main alloying element 8XXX Special element a lloys 9XXX Unused series Ex: Al6061: 6-alloy group; 0- impurity: 61- 99.61 (purity of Al used for composition) NOMENCLATURE: The Aluminum Association has published a new alloy designation system for aluminum alloys. The new system has all the wrought aluminum alloys designated by a four-digit system. The First digit indicates the principal alloying elements, the second digit is the modification(variation) of original material or impurity limits and the last two digits represents the aluminium alloy or aluminium purity.