Architectural product

Details Architectural product Architectural product

1985-09-17

1987-12-29

Dean, R.

Metal treatment

Compositions

Heat treating

148 115A, 148400, 148437, 148438, 148439, 148440, 204 33, 204 58, C22F 104

Patent

active

047159014

ABSTRACT:
Structural streaking defects in anodized aluminum architectural sheet products are substantially reduced or eliminated in 1XXX and 5XXX type aluminum alloys by including therein 0.01 to 0.08% of chromium or manganese, preferably both. It is preferred to combine such with continuously casting the ingot under high chill rate conditions such as employing low liquid metal head within the direct chill mold.

REFERENCES:
Alloy Digest, Aluminum 1100, Feb. 1974, Engineering Alloys Digest Inc., Upper Montclair, N.J.
Alloy Digest, Aluminum 5005, Nov. 1978, Engineering Alloys Digest Inc., Upper Montclair, N.J.
Aluminum Standards and Data, Third Edition, Jan. 1972, pp. 13, Aluminum Association.

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