ALUMINUM ALLOY FOR CASTING HAVING HIGH RIGIDITY AND LOW LINEAR EXPANSION COEFFICIENT
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United States of America Patent
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Issued Date -
Nov 25, 2010
app pub date -
Aug 2, 2010
filing date -
Mar 23, 2004
priority date (Note) -
Abandoned
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Abstract
[Objectives] An aluminum alloy for casting with excellent rigidity and having a low coefficient of linear expansion, and at the same time, does not have a high cost, and has a few restrictions at the time of recycling.[Means for Achieving Objectives] An aluminum alloy for casting with excellent rigidity and having a low coefficient of linear expansion containing 13-25% by mass of silicon, 2-8% by mass of copper, 0.5-3% by mass of iron, 0.3-3% by mass of manganese, 0.001-0.02% by mass of phosphorus, and the remainder comprising aluminum and inevitable impurities, wherein the total amount of iron and manganese is 3.0% by mass or greater. Said alloy may further contain 0.5-6% by mass of nickel, and the total amount of iron, manganese, and nickel may be 3.0% by mass or greater. Further, said alloy may further contain one or more of 0.1-1.0% by mass of chromium, 0.05-1.5% by mass of magnesium, 0.01-1.0% by mass of titanium, 0.0001-1.0% by mass of boron, 0.1-1.0% by mass of zirconium, 0.1-1.0% by mass of vanadium, or 0.01-1.0% by mass of molybdenum.
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