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6061 is highly weldable, for example using tungsten inert gas welding (TIG) or metal inert gas welding (MIG). Typically, after welding, the properties near the weld are those of 6061-T4, a loss of strength of around 40%. The material can be re-heat-treated to restore near -T6 temper for the whole piece.
The temper designation follows the cast or wrought designation number with a dash, a letter, and potentially a one to three digit number, e.g. 6061-T6. The definitions for the tempers are: [5] [6]-F : As fabricated-H : Strain hardened (cold worked) with or without thermal treatment -H1 : Strain hardened without thermal treatment
Aluminium–magnesium–silicon alloys ... T6 69500 26200 255 285 14 90 n.b. ... EN AW-6061 AlMg1SiCu T4 70000 26300 140 235 21 65 60
The starting material is primary aluminium; in contrast to other cast aluminium alloys, secondary aluminium (made from scrap) is not used because it reduces elongation and toughess at break. The AlCu cast alloys are prone to hot cracking and are used in the T4 and T6 hardening states. [14]
Aluminum 1100–O (annealed) 0.20: 180 2024 aluminum alloy (heat treated—T3) 0.16: 690 5052-O 0.13 210 Aluminum 6061–O (annealed) 0.20: 205 Aluminum 6061–T6: 0.05: 410 Aluminum 7075–O (annealed) 0.17: 400 Brass, Naval (annealed) 0.49: 895 Brass 70–30 (annealed) 0.49: 900 Brass 85–15 (cold-rolled) 0.34: 580 Cobalt-base alloy (heat ...
6063 is the most common alloy used for aluminium extrusion. It allows complex shapes to be formed with very smooth surfaces fit for anodizing and is popular for visible architectural applications such as window frames, door frames, roofs, and sign frames. [3] Applications requiring higher strength typically use 6061 or 6082 instead.