Aluminum alloy shapes

Details Aluminum alloy shapes Aluminum alloy shapes

1975-02-18

1977-08-02

Dean, R.

Metal treatment

Compositions

Heat treating

75147, 148 2, 148 127A, 148 206, 148 325, 148159, C22C 2108

Patent

active

040393550

ABSTRACT:
An aluminum alloy consising essentially of 0.65 to 0.75% by weight of magnesium and 0.50 to 0.60% by weight of silicon or 0.47 to 0.57% by weight of magnesium and 0.75 to 0.85% by weight of silicon, 0.15% to 0.25% by weight of iron, less than 0.05% of an impurity selected from the group consisting of copper, manganese, zinc, chromium, and titanium and the balance aluminum, the aluminum alloy being subjected to aging treatment at a temperature below 200.degree. C for 20 to 50 minutes to obtain 0.2% proof stress larger than 11 kg/mm.sup.2, ultimate tensile strength larger than 20 kg/mm.sup.2 and elongation more than 8%. Aluminum alloy shapes are formed of the above aluminum alloy by extrusion forming of the aluminum alloy to obtain an extrusion, coating a film on the surface of the extrusion with a water-soluble paint after forming thereon a ground film, heating the extrusion at a temperature below 200.degree. C for 20 to 50 minutes to effect printing and hardening of the coated film and age hardening of the extrusion at the same time.

REFERENCES:
patent: 3032448 (1962-05-01), Siebel et al.
patent: 3234054 (1966-02-01), Sperry
patent: 3642542 (1972-02-01), Sperry et al.
patent: 3899370 (1975-08-01), Takahashi et al.

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