Aluminum alloy suitable for pistons

The alloy in accordance with claim I wherein Zn is 0.05 to 0.2 wt. %.

In the manufacture of a combustion engine component wherein said component is made from an aluminum alloy, the improvement wherein said alloy is provided as an alloy consisting essentially of 9.0 to 13.0 wt. % Si, 3.0 to 6.0 wt. % Ni, 3.0 to 5.0 wt. % Cu, 0.005 to 0.3 wt. % Sr, at least one of the elements selected from Mg, Mn, V, Sc, Fe, Ti, Zn, B and Cr, said elements having the ranges:

• 0.8 wt. % Mg max., 1 wt. % Mn max., 0.3 wt. % V max., 0.3 wt. % Sc max., 0.25 wt. % Ti max., up to 0.2 wt. % B, up to 0.2 wt. % Cr, 0.5 wt. % Zn max. and 0.8 wt. % Fe max, the remainder aluminum and impurities.

A piston made from an aluminum alloy consisting essentially of 9.0 to less than 14 wt. % Si, 3.0 to 7.0 wt. % Ni, 1.5 to 6.0 wt. % Cu, 0.005 to 0.1 wt. % Sr, at least one of the elements selected from Mg, Mn, V, Sc, Fe, Ti, Zn, B and Cr, said elements having the ranges:

• 0.8 wt. % Mg max., 1 wt. % Mn max., 0.3 wt. % V max., 0.3 wt. % Sc max., 0.25 wt. % Ti max., up to 0.2 wt. % B, up to 0.2 wt. % Cr, 0.5 wt. % Zn max. and 0.8 wt. % Fe max, the remainder aluminum and impurities.

A piston made from an aluminum alloy consisting essentially of 9.0 to 13.0 wt. % Si, 3.0 to 6.0 wt. % Ni, 3.0 to 5.0 wt. % Cu, 0.005 to 0.1 wt. % Sr, at least one of the elements selected from Mg, Mn, V, Sc, Fe, Ti, Zn, B and Cr, said elements having the ranges:

• 0.8 wt. % Mg max., 1 wt. % Mn max., 0.3 wt. % V max., 0.3 wt. % Sc max., 0.25 wt. % Ti max., up to 0.2 wt. % B, up to 0.2 wt. % Cr, 0.5 wt. % Zn max. and 0.8 wt. % Fe max, the remainder aluminum and impurities.

In an internal combustion engine, a piston made from an alloy consisting essentially of 9.0 to less than 14 wt. % Si, 3.0 to 7.0 wt. % Ni, 1.5 to 6.0 wt. % Cu, 0.005 to 0.1 wt. % Sr, at least one of the elements selected from Mg, Mn, V, Sc, Fe, Ti, Zn, B and Cr, said elements having the ranges:

• 0.8 wt. % Mg max., 1 wt. % Mn max., 0.3 wt. % V max., 0.3 wt. % Sc max., 0.25 wt. % Ti max., up to 0.2 wt. % B, up to 0.2 wt. % Cr, 0.5 wt. % Zn max. and 0.8 wt. % Fe max, the remainder aluminum and impurities.

In an internal combustion engine, a piston made from an aluminum alloy consisting essentially of 9.0 to 13.0 wt. % Si, 3.0 to 6.0 wt. % Ni, 3.0 to 5.0 wt. % Cu, 0.005 to 0.1 wt. % Sr, at least one of the elements selected from Mg, Mn, V, Sc, Fe, Ti, Zn, B and Cr, said elements having the ranges:

• 0.8 wt. % Mg max., 1 wt. % Mn max., 0.3 wt. % V max., 0.3 wt. % Sc max., 0.25 wt. % Ti max., up to 0.2 wt. % B, up to 0.2 wt. % Cr, 0.5 wt. % Zn max. and 0.8 wt. % Fe max, the remainder aluminum and impurities.

In the manufacture of an engine component having a reciprocating piston therein wherein said component is made from an aluminum alloy, the improvement wherein said alloy is provided as an alloy consisting essentially of 9.0 to less than 14 wt. % Si, 3.0 to 7.0 wt. % Ni, 1.5 to 5.0 wt. % Cu, 0.005 to 0.1 wt. % Sr, at least one of the elements selected from Mg, Mn, V, Sc, Fe, Ti, Zn, B and Cr, said elements having the ranges:

• 0.8 wt. % Mg max., 1 wt. % Mn max., 0.3 wt. % V max., 0.3 wt. % Sc max., 0.25 wt. % Ti max., up to 0.2 wt. % B, up to 0.2 wt. % Cr, 0.5 wt. % Zn max. and 0.8 wt. % Fe max, the remainder aluminum and impurities.

An aluminum alloy product suitable for high temperature applications consisting essentially of 9.0 to 11.0 wt % Si, 3.0 to 6.0 wt. % Ni, 1.5 to 5.0 wt. % Cu, 0.005 to 0.1 wt. % Sr, at least one of the elements selected from Mg, Mn, V, Sc, Fe, Ti, Zn, B and Cr, said elements having the ranges:

• 0.8 wt. % Mg max., 1 wt. % Mn max., 0.3 wt. % V max., 0.3 wt. % Sc max., 0.25 wt. % Ti max., up to 0.2 wt. % B, up to 0.2 wt. % Cr, 0.5 wt. % Zn max. and 0.8 wt. % Fe max, the remainder aluminum and impurities.