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6063 is an aluminum alloy, with magnesium and silicon as the alloying elements. It has generally good mechanical properties and is heat treatable and weldable. It is similar to the British aluminium alloy HE9.
It is commonly produced in several heat temper grades, 6063-O, 6063-T1, 6063-T4, 6063-T5, and 6063-T6.
Additional recommended knowledge
6063 has a specific gravity of 2.68 (0.097 lb/cubic inch).
The alloy composition of 6063 is: 
Un-heat-treated 6063 (6063-0 temper) has maximum tensile strength no more than 19,000 psi, and no specified maximum yield strength. The material has elongation (stretch before ultimate failure) of 18%.
T1 temper 6063 has an ultimate tensile strength of at least 17,000 psi in thicknesses up to 0.5 inch, and 16,000 psi from 0.5 to 1.0 inch thick, and yield strength of at least 9,000 psi in thickness up to 0.5 inch and 8,000 psi from 0.5 to 1.0 inch thick. It has elongation of 12%.
T4 temper 6063 has an ultimate tensile strength of at least 19,000 psi in thicknesses up to 0.5 inch, and 18,000 psi from 0.5 to 1.0 inch thick, and yield strength of at least 10,000 psi up to 0.5 inch and 9,000 psi from 0.5 to 1.0 inch. It has elongation of 14%.
T5 temper 6063 has an ultimate tensile strength of at least 22,000 psi in thicknesses up to 0.5 inch, and 21,000 psi from 0.5 to 1.0 inch thick, and yield strength of at least 16,000 psi up to 0.5 inch and 15,000 psi from 0.5 to 1.0 inch. It has elongation of 8%.
T6 temper 6063 has an ultimate tensile strength of at least 30,000 psi and yield strength of at least 25,000 psi. In thicknesses of 0.124 inch or less, it has elongation of 8% or more; in thicker sections, it has elongation of 10%.
6063 is also produced in tempers T52, T53, T54, and T55, with various improved properties.
6063 is used for architectural fabrication, window and door frames, pipe and tubing, and aluminum furniture. 
6063 is highly weldable, using Tungsten inert gas welding. Typically, after welding, the properties near the weld are those of 6063-0, a loss of strength of up to 30%. The material can be re-heat-treated to restore a higher temper for the whole piece.
6063 is widely used in the production of extrusions - long constant-cross-section structural shapes produced by pushing metal through a shaped die. These include "L" and "U" shaped channels and angles.
|This article is licensed under the GNU Free Documentation License. It uses material from the Wikipedia article "6063_aluminium". A list of authors is available in Wikipedia.|