Abstract: Aluminum brazing alloys for assembling aluminum heat exchangers by brazing which consist essentially of 4.5 to 13.5% of Si, from 0.005% to less than 0.1% of Sr and the balance essentially Al and, further, optionally may contain at least one element selected from the group consisting of 0.3 to 3.0% of Mg, 2.3 t0 4.7% of Cu and 9.3 to 10.7% of Zn. The aluminum brazing alloys provide high strength brazed joints with highly refined microstructure and brazing operation can be performed in a good condition without causing any detrimental cavity. Such excellent properties make the brazing alloys especially suited for the fabrication of superhigh pressure heat exchangers.

Abstract: Silicon carbide particulate reinforced aluminum alloy matrix composites are formed using techniques which include agitation of a melt of aluminum alloy, containing magnesium, and silicon carbide particulates in a manner whereby the silicon carbide particles are maintained, during agitation, within the body of the melt; the agitation, which involves shearing or wiping of the particles in the liquid, is carried out under vacuum; and may involve incorporation into the melt of an additional amount of magnesium such that that amount compensates for the amount of magnesium which segregates to the carbide surfaces, and is sufficient to effect strengthening of the resulting composite. Aluminum alloy matrix composites, containing copper, are produced using similar agitation and mixing procedures, with the copper being incorporated in such a way as to discourage reaction between the copper and SiC particles.

Abstract: An article having two rigid layers joined by an aziridine-containing layer is provided.

Abstract: The invention relates to hollow bodies for gas under pressure manufactured from an aluminum alloy containing Zn, Cu and Mg as principal alloying elements and intended in particular for the production of metal bottles for pressurized gas. The hollow bodies are manufactured from an alloy consisting essentially of (in % by weight):______________________________________ 6.25 .ltoreq. Zn .ltoreq. 8.0 Mn .ltoreq. 0.20 1.2 .ltoreq. Mg .ltoreq. 1.95 Zr .ltoreq. 0.05 1.7 .ltoreq. Cu .ltoreq. 2.8 Ti .ltoreq. 0.05 0.15 .ltoreq. Cr .ltoreq. 0.28 Others each .ltoreq.0.05 Fe .ltoreq. 0.20 Others total .ltoreq.0.15 Si + Fe .ltoreq. 0.40 Balance Al. ______________________________________The alloy in state T73 complies with the very severe technical requirements in respect of strength and ductility which are imposed in relation to use for hollow bodies under pressure.

Abstract: Loose metal particles, or a consolidated metal particle composition, of an aluminum alloy consisting essentially of about 5 to 13% zinc, 1 to 3.5% magnesium, 0.5 to 3.0% copper, with iron being present up to 0.5%, with silicon being present up to 0.4%, plus nickel or cobalt or both being present in an amount effective essentially to place the iron in the incoherent dispersoid Al.sub.9 (Fe,M).sub.2, M being nickel or cobalt or both, M being present up to 0.75%, plus means being present for forming coherent dispersoids, said means being present up to 1%, balance aluminum.

Abstract: An aluminum alloy having excellent properties including extrusibility, forgeability and malleability, the alloy containing 4.0 to 12% of zinc, 0.3 to 5.0% of magnesium, and one or more elements selected from the rare earth elements, wherein the content of the selected element is in the range of 0.5 to 10.0%, and the balance being substantially aluminum and unavoidable impurities.

Abstract: An improved aluminum base alloy product is disclosed, the product comprising 0 to 3.0 wt. % Cu, 0 to 1.5 wt. % Mn, 0.1 to 4.0 wt. % Mg, 0.8 to 8.5 wt. % Zn, at least 0.005 wt. % Sr, max. 1.0 wt. % Si, max. 0.8 wt. % Fe and max. 0.45 wt. % Cr, 0 to 0.2 wt. % Zr, the remainder aluminum and incidental elements and impurities.

Abstract: Aluminum alloys having compositions within the ranges (in Wt %) 0.2 to 3 lithium -0 to 4 magnesium -0.4 to 5 zinc -0 to 2 copper -0 to 0.2 zirconium -0 to 0.5 manganese -0 to 0.5 nickel -0 to 0.4 chromium-balance aluminum. The alloys are precipitation hardenable and exhibit a range of properties, according to heat treatment, which made them suitable for engineering applications where light weight and high strength are necessary.

Abstract: A brazing material is disclosed, particularly suitable for the brazing of fins onto a heat exchanger exposed to high internal pressure, comprised of an Al-Si based alloy wherein the Fe content is limited to not more than 0.15 wt %. The brazing material is suitable for use in the brazing of Mg-containing materials.

Abstract: A process and a device for manufacturing an extruded section of an aluminum alloy containing additions of boron or compounds thereof are intended to simplify the manufacture of aluminum alloy sections for use in nuclear science and technology. Using a boron-containing aluminum-based raw material a section is to be formed such that its design ensures adequate stability and at the same time the necessary screening properties. To this end a billet having a core of aluminum alloy with additions of boron or the like and a mantel surrounding the same is manufactured and hot formed by extrusion, such that, using the molten metal route or powder metallurgy, a blank of aluminum alloy of particular alloy groups with additions of boron or its compounds at a concentration of 0.05 to 50 wt % is taken as the starting basis.

Abstract: An aluminium base alloy having a composition within the following ranges in weight percent:______________________________________ Lithium 2.3 to 2.9 Magnesium 0.5 to 1.0 Copper 1.6 to 2.4 Zirconium 0.05 to 0.25 Titanium 0 to 0.5 Manganese 0 to 0.5 Nickel 0 to 0.5 Chromium 0 to 0.5 Zinc 0 to 2.0 Aluminium Remainder (apart from incidental impurities).

Abstract: A fine aluminum metallurgical powder suitable for compacting and sintering into densified articles which includes a dispersed phase is produced by directing a stream of molten droplets at a repellent surface to produce smooth surfaced and melt solidified particles having an average particle size of less than about ten micrometers.

Abstract: An aluminium base alloy having a composition within the following ranges in weight percent:______________________________________ Lithium 2.1-2.9 Magnesium 3.0-5.5 Copper 0.2-0.7 and ______________________________________one or more constituents selected from the group consisting of Zirconium, Hafnium and Niobium as follows: ______________________________________ Zirconium 0.05-0.25 Hafnium 0.10-0.50 Niobium 0.05-0.30 and Zinc 0-2.0 Titanium 0-0.5 Manganese 0-0.5 Nickel 0-0.5 Chromium 0-0.5 Germanium 0-0.2 Aluminium Remainder (apart from incidental impurities).

Abstract: An improved aluminum base alloy which provides corrosion protection in fin stock applications includes 0.6-3.0% silicon; 0.2-1.0% by weight iron; up to 0.2% by weight copper; 0.8-2.0% by weight manganese; up to 0.2% by weight magnesium; from about 0.5% by weight zinc to 2.5% by weight zinc; up to 0.2% by weight other constituents; and the balance aluminum. The alloy is especially useful as a sacrificial alloy having improved mechanical strength.

Abstract: A hollow body from an aluminum alloy is prepared by a method of manufacturing a hollow body under pressure from an aluminum alloy, comprising the steps of:(1) preparing an alloy of a composition consisting of (by weight) 5.6.ltoreq.Zn.ltoreq.6.1, 2.0.ltoreq.Mg.ltoreq.2.4, 1.3.ltoreq.Cu.ltoreq.1.7, 0.15.ltoreq.Cr.ltoreq.0.25, Fe.ltoreq.0.10, Fe+Si.ltoreq.0.25, Mn.ltoreq.0.04, Zr.ltoreq.0.03, Ti.ltoreq.0.04, with the remainder of the alloy being aluminum and impurities with the total amount of impurities being no more than 0.15 with the maximum amount of any given impurity being 0.05;(2) casting the alloy in the form of a billet;(3) hot extruding a billet at a temperature between 350.degree. and 450.degree. C. by the indirect process into the form of a case;(4) drawing out the resultant case hot then cold;(5) hot necking the drawn case between 350.degree. and 450.degree. C.;(6) solution annealing the hot necked case between 450.degree. and 490.degree. C.

Abstract: An aluminum base material with a hard facing deposit which shows extremely good hot hardness properties when subjected to high operating temperatures. The invention provides a hard facing deposit which shows a hot hardness of at least 100 BHN at 600.degree. F., and has sufficient toughness to resist the formation of cracks when subjected to such operating temperatures. According to the preferred embodiment, the hard facing deposit includes, by weight, about 6% to about 12% silicon, up to about 6% copper, about 2% to about 6% manganese, up to about 3% iron, and about 16% to about 25% nickel. The invention is particularly useful in forming a heavy duty diesel engine piston with a piston ring groove formed in the hard facing deposit.