Specialized metallurgical processes – compositions for use therei – Processes – Free metal or alloy reductant contains magnesium
Patent
1978-08-04
1981-04-07
Dean, R.
Specialized metallurgical processes, compositions for use therei
Processes
Free metal or alloy reductant contains magnesium
75141, 148 32, 148 325, C22C 2108
Patent
active
042604192
ABSTRACT:
A composition whereby aluminum scrap, including consumer scrap, is recycled into aluminum sheet and aluminum containers. Aluminum scrap is melted in a heated furnace to form a melt composition. The melt is adjusted to form the present composition, consisting essentially of silicon, 0.1-1.0%; iron 0.1-0.9%; manganese 0.4-1.0%; magnesium 1.3-2.5%; copper 0.05-0.4%; and titanium, 0-0.2%, the balance being essentially aluminum. Aluminum scrap comprising consumer scrap, plant scrap, and can making scrap is heated to form the melt composition, which requires a minimum amount of adjustment to arrive at the present alloy composition. The composition is suitable for fabrication into sheet having strength and formability properties making it suitable for container manufacture. Container manufacture according to the process and composition of the present invention comprises drawn-and-ironed can body manufacture and easy-opening end manufacture. Sheet fabrication according to the present invention comprises conventional direct chill casting or continuous strip casting.
REFERENCES:
patent: 3787248 (1974-01-01), Setzer et al.
patent: 3802931 (1974-04-01), Bylund
patent: 3930895 (1976-01-01), Moser et al.
Coors Container Company
Dean R.
Klaas Bruce G.
Shelton Dennis K.
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