Aluminum alloy for engine blocks

Details Aluminum alloy for engine blocks Aluminum alloy for engine blocks

2005-07-26

2005-07-26

Wyseomierski, George (Department: 1742)

Alloys or metallic compositions

Aluminum base

Copper containing

C420S546000, C420S549000

Reexamination Certificate

active

06921512

ABSTRACT:
An aluminum alloy is disclosed that is suitable for casting and machining cylinder blocks for engines, especially gasoline fuel engines for automotive vehicles. The casting has the strength and wear resistance to piston/seal scuffing for such engines. The alloy comprises, by weight, 9.5 to 12.5% silicon, 0.1 to 1.5% iron, 1.5 to 4.5% copper, 0.2 to 3% manganese, 0.1 to 0.6% magnesium, 2.0% max zinc, 0 to 1.5% nickel, 0.25% maximum titanium, up to 0.05% strontium and the balance aluminum, where the weight ratio of manganese to iron is 1.2 to 1.75 or higher when the iron content is equal to or greater than 0.4% and the weight ratio of manganese to iron is at least 0.6 to 1.2 when the iron content is less than 0.4% of the alloy.

REFERENCES:
patent: 4434014 (1984-02-01), Smith
patent: 5217546 (1993-06-01), Eady et al.
patent: 5484492 (1996-01-01), Rogers et al.
patent: 57079140 (1982-05-01), None
patent: 58042748 (1983-03-01), None
“ASM Handbook: vol. 15 Casting” ASM International, 1988, p 744, 746.
“ASM Handbook: vol. 15 Casting”, ASM International, 1988, p751-752.

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