Provided is a method for manufacturing an Al alloy that includes Cu and C, by a manufacturing method provided with a step for adding graphite particles, and particles of a carbonization promoter containing boron or a boron compound, to Al molten metal that includes Cu.

An apparatus, material and method for forming a brazing sheet has a composite braze liner layer of low melting point aluminum alloy and 4000 series braze liner. The low melting point layer of the composite braze liner facilitates low temperature brazing and decrease of the diffusion of magnesium from the core into the composite braze liner. The reduction of magnesium diffusion also lowers the formation of associated magnesium oxides at the braze joint interface that are resistant to removal by Nocolok flux, thereby facilitating the formation of good brazing joints through the use of low temperature controlled atmosphere brazing (CAB) and Nocolok flux. The apparatus also enables the production of brazing sheet materials with high strength and good corrosion property.

An apparatus, material and method for forming a brazing sheet has a composite braze liner layer of low melting point aluminum alloy and 4000 series braze liner. The low melting point layer of the composite braze liner facilitates low temperature brazing and decrease of the diffusion of magnesium from the core into the composite braze liner. The reduction of magnesium diffusion also lowers the formation of associated magnesium oxides at the braze joint interface that are resistant to removal by Nocolok flux, thereby facilitating the formation of good brazing joints through the use of low temperature controlled atmosphere brazing (CAB) and Nocolok flux. The apparatus also enables the production of brazing sheet materials with high strength and good corrosion property.

The invention relates to a rolled composite aerospace product (10) comprising a 2XXX-series core layer (20), preferably an AA2024-series aluminium alloy, and an Al—Mn alloy layer (30) coupled to at least one surface of the 2XXX-series core layer, and wherein the Al—Mn alloy layer (30) is of a 3XXX-series aluminium alloy comprising 0.3% to 2.0% Mn.

The invention relates to a rolled composite aerospace product (10) comprising a 2XXX-series core layer (20), preferably an AA2024-series aluminium alloy, and an Al—Mn alloy layer (30) coupled to at least one surface of the 2XXX-series core layer, and wherein the Al—Mn alloy layer (30) is of a 3XXX-series aluminium alloy comprising 0.3% to 2.0% Mn.

New 2xxx aluminum alloys having are disclosed. The new 2xxx aluminum alloys generally include 2.5-3.9 wt. % Cu, 0.82-1.20 wt. % Li, 0.5-2.0 wt. % Zn, 0.10-0.60 wt. % Mn, 0.05-0.35 wt. % Mg, from 0.05 to 0.50 wt. % of at least one grain structure control element, wherein the at least one grain structure control element is selected from the group consisting of Zr, Sc, Cr, V, Hf, other rare earth elements, and combinations thereof, up to 0.22 wt. % Ag, up to 0.15 wt. % Fe, up to 0.12 wt. % Si, and up to 0.15 wt. % Ti, the balance being aluminum, incidental elements and impurities. The new 2xxx aluminum alloys may realize an improved combination of two or more of strength, fracture toughness, elongation, and corrosion resistance.

New 2xxx aluminum alloys having are disclosed. The new 2xxx aluminum alloys generally include 2.5-3.9 wt. % Cu, 0.82-1.20 wt. % Li, 0.5-2.0 wt. % Zn, 0.10-0.60 wt. % Mn, 0.05-0.35 wt. % Mg, from 0.05 to 0.50 wt. % of at least one grain structure control element, wherein the at least one grain structure control element is selected from the group consisting of Zr, Sc, Cr, V, Hf, other rare earth elements, and combinations thereof, up to 0.22 wt. % Ag, up to 0.15 wt. % Fe, up to 0.12 wt. % Si, and up to 0.15 wt. % Ti, the balance being aluminum, incidental elements and impurities. The new 2xxx aluminum alloys may realize an improved combination of two or more of strength, fracture toughness, elongation, and corrosion resistance.

A trailer hitch ball mount includes: a hitch portion that has a square tubular shape; a ball portion; and a bridging portion that connects the hitch portion and the ball portion. The ball portion includes a first rectangular recess on a top surface of the ball portion; two parallel first side walls are formed at two parallel sides of the first rectangular recess, and other two parallel sides of the first rectangular recess are open; the bridging portion has a streamlined contour; and the trailer hitch ball mount comprises an aluminum alloy.

A trailer hitch ball mount includes: a hitch portion that has a square tubular shape; a ball portion; and a bridging portion that connects the hitch portion and the ball portion. The ball portion includes a first rectangular recess on a top surface of the ball portion; two parallel first side walls are formed at two parallel sides of the first rectangular recess, and other two parallel sides of the first rectangular recess are open; the bridging portion has a streamlined contour; and the trailer hitch ball mount comprises an aluminum alloy.

An aluminum alloy for manufacturing wire for cold forming, in particular for manufacturing connecting elements, includes an alloy content of aluminum greater than 88 mass % and an alloy content of copper greater than or equal to 5 mass % as main alloy elements. The aluminum alloy contains no boron. Nickel and silicon are additional alloy elements, with an alloy content of nickel greater than or equal to 0.15 mass %, and an alloy content of silicon less than or equal to 1.0 mass %. A wire for manufacturing connecting elements or screws and a connecting element or screw made of the aluminum alloy are also provided.