Abstract: Recycle friendly aluminum alloys are described which are variants of AA 3000 and AA 5000 series alloys containing higher than usual amounts of silicon and iron. The alloys contain in percentages by weight, more than 0.6-2.0% silicon, 0.9-2.4% iron, wherein the ratio of the amount of iron to the amount of silicon is in the range of 1.2-1.8:1. Other components of the alloys may include 0-0.4% copper, 0-1.5% manganese, 0-5.0% magnesium, 0-0.5% zinc, 0-3.5% chromium, 0-0.1% titanium and the balance aluminum and incidental impurities.

Abstract: The present invention provides an Al—Mg—Si alloy sheet in which the production of ridging marks during press forming is noticeably inhibited, and in addition, provides a manufacturing method capable of providing such an aluminum alloy sheet, and an intermediate material in the manufacture thereof. The Al—Mg—Si alloy sheet in accordance with the present invention is characterized by having a prescribed composition, and characterized in that respective textures are present therein with a good balance. Further, in accordance with the manufacturing method, and the intermediate material in the manufacture thereof of the present invention, it is possible to manufacture the alloy with high efficiency.

Abstract: An aluminum-silicon lost foam casting alloy having reduced microporosity and a method for casting the same is herein disclosed. A preferred lost foam cast alloy consists essentially of 6 to 12% by weight silicon and preferably 9.0 to 9.5% by weight silicon, 0.035-0.30% strontium, 0.40% maximum iron, 0.45% maximum copper, 0.49% maximum manganese, 0.60% maximum magnesium, 3.0% maximum zinc, and the balance aluminum. Most preferably, the lost foam alloy is free from iron, titanium and boron. However, such elements may exist at trace levels. Most preferably, the alloy is lost foam cast with the process that applies at least 10 atmospheres of pressure during solidification. However, the range may be 5 to 60 atmospheres. The strontium addition is greater than 0.005% by weight and most preferably greater than 0.05% by weight.

Abstract: The present invention relates to a friction stir welding process for joining two members having different shearing strengths, and a friction stir welded structure fabricated by the process. The friction stir welding process includes the step of positioning a first welded member and a second welded member such that both members overlap each other, thereby defining an overlapped region, and the step of inserting a rotating pin into the overlapped region from a surface of the second welded member, so that the first and second welded members are joined together. In this process, the first welded member has a lower shearing strength than that of the second welded member.

Abstract: Disclosed herein is an aluminum alloy composition consisting essentially of, on the basis of total weight of the composition, 13 to 28 wt % of silicon, 1.5 to 5 wt % of a metal element selected from iron and manganese, 3 to 10 wt % of zinc, 0.5 to 1 wt % of magnesium, and aluminum as balance. Also disclosed herein is an aluminum alloy product made from said aluminum alloy composition and exhibiting improved mechanical properties at high temperatures, including excellent wear resistance, hardness and thermal stability.

Abstract: Extruded aluminum alloy which excels in machinability, caulking properties, and wear resistance, the extruded aluminum alloy including 3.0 to 6.0 mass % of Si, 0.1 to 0.45 mass % of Mg, 0.01 to 0.5 mass % of Cu, 0.01 to 0.5 mass % of Mn, and 0.40 to 0.90 mass % of Fe, with the balance being Al and unavoidable impurities.

Abstract: A hypoeutectic aluminum silicon casting alloy having a refined primary silicon particle size and a modified iron morphology. The alloy includes 10 to 11.5% by weight silicon, 0.10 to 0.70% by weight magnesium and also contains 0.05 to 0.07% by weight strontium. On cooling from the solution temperature, the strontium serves to modify the silicon eutectic structure as well as create an iron phase morphology change. Such changes facilitate feeding through the aluminum interdendritic matrix. This, in turn, creates a finished die cast product with extremely low levels of microporosity defects. The alloy may be used to cast engine blocks for marine outboard and stern drive motors. Furthermore, when the magnesium levels are adjusted to approximately 0.10 to 0.20% by weight magnesium, propellers having a highly advantageous ductility may be obtained.

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.

Abstract: Recycle friendly aluminum alloys are described which are variants of AA 3000 and AA 5000 series alloys containing higher than usual amounts of silicon and iron. The alloys contain in percentages by weight, more than 0.6-2.0% silicon, 0.9-2.4% iron, wherein the ratio of the amount of iron to the amount of silicon is in the range of 1.2-1.8:1. Other components of the alloys may include 0-0.4% copper, 0-1.5% manganese, 0-5.0% magnesium, 0-0.5% zinc, 0-3.5% chromium, 0-0.1% titanium and the balance aluminum and incidental impurities.

Abstract: A vacuum brazing method is disclosed for joining aluminum stock materials to each other. The typical cladding material utilized includes aluminum and a melting point lowering agent such as silicon. In addition, the cladding material typically includes magnesium to provide for enhanced wetting of the cladding material into the joint area. It has been found that adjusting the ratio of magnesium to calcium to a level of equal to or greater than 625 to 1 provides greatly enhanced brazed joint formation and reliability of the vacuum brazing method.

Abstract: A non-Cu-based cast Al alloy contains substantially no Cu, and has a tensile strength of 305 MPa or more, a 0.2% yield strength of 220 MPa or more, and an elongation of 10% or more. In the heat treatment of the cast Al alloy, the solution treatment is performed using a fluidized bed 18, and the solution treatment is performed by rapid heating up to the solution treatment temperature in 30 minutes, and maintaining the solution treatment temperature in 3 hours or less. Because this method for heat treatment performs solution treatment at an increased speed of heating-up time, with small deviation of temperature, and at a higher temperature, total time for heat treatment can be shortened drastically in comparison with the conventional method. A non-Cu-based cast Al alloy having well-balanced mechanical properties of tensile strength, yield strength, and elongation can be provided.

Abstract: An improved Al—Si—Mg—Mn casting alloy that consists essentially of: about 6.0-9.0 wt. % silicon, about 0.2-0.8 wt. % magnesium, about 0.1-1.2 wt. % manganese, less than about 0.15 wt. % iron, less than about 0.3 wt. % titanium and less than about 0.04 wt. % strontium, the balance aluminum. Preferrably, this casting alloy is substantially copper-free, chromium-free and beryllium-free.

Abstract: There is disclosed a cast-forged product of an aluminum alloy consisting essentially of: 0.6 to 1.8 wt % of silicon; 0.6 to 1.8 wt % of magnesium; 0.8 wt % or less of copper; 0.2 to 1.0 wt % of manganese; 0.25 wt % or less of chromium; 0.0 to 0.15 wt % of titanium; and unavoidably contained impurities. When the product is used as various parts for automobiles formed of aluminum, such as suspension parts, frames, and parts for engines, the product is more superior in mechanical properties such as a tensile strength, proof stress, and elongation, and can be manufactured with a low cost.

Abstract: A monolithic container having a bottom wall, a sidewall interconnected to the bottom wall and extending upwardly and outwardly therefrom to define an open end of the monolithic container at an upper edge of the sidewall, the sidewall having a peripheral flange extending outwardly from the upper edge. The monolithic container formed from an aluminum alloy feedstock comprising: from about 0.05 to 0.55% by weight silicon, from 0.10 to about 0.50% by weight iron, from less than about 0.60% by weight copper, from about less than about 0.4% by weight manganese, from about 0.9 to about 1.8% by weight magnesium, with the balance being aluminum and impurities.

Abstract: A recrystallization-hardenable aluminum cast alloy includes in addition to aluminum the following elements as functional elements: (1) 5 to 10 weight % silicon, (2) 0.2 to 0.35 weight % magnesium, (3) 0.3 to 3 weight % nickel and/or 0.6 to 3 weight % cobalt, and impurities due to manufacturing.

Abstract: An aluminum-beryllium-silicon based alloy is disclosed, which comprises 5.0 to 30.0 mass % of Be, 0.1 to 15.0 mass % of Si and 0.1 to 3.0 mass %, the balance being Al and inevitable impurities. The alloy is useful for producing automobile engine parts, etc.

Abstract: A shock absorbing material comprising an Al—Mg—Si series aluminum alloy having high strength and showing excellent energy absorbing property when compressed in the axial direction of extrusion is obtained. The shock absorbing material of the invention has a hollow cross section, mainly comprises a fibrous structure and can be manufactured by press quenching just after extrusion followed by aging. In the press quenching, press quenching under air-cooling advantageous in view of the dimensional accuracy or the cost can be adopted. Further, the shock absorbing material of the invention has excellent cracking resistance to a compressive load in the lateral direction as well as in the axial direction. The shock absorbing material of the invention is suitable as side members or bumper stays in the frame structures of automobiles.

Abstract: A casting alloy of the AlMgSi type comprises Magnesium 3.0 to 7.0 wt. % Silicon 1.7 to 3.0 wt. % Manganese 0.2 to 0.48 wt. % Iron 0.15 to 0.35 wt. % Titanium as desired max. 0.2 wt. % Ni 0.1 to 0.4 wt % and aluminum as the rest along with production related impurities, individually at most 0.02 wt. %, in total at most 0.2 wt. %, with the further provision that the magnesium and silicon are present in the alloy in a Mg:Si weight ratio of 1.7:1, corresponding to the composition of the quasi binary eutectic made up of the solid state phases Al and Mg2Si, whereby the deviation from the exact composition of the quasi-binary eutectic amounts to at most −0.5 to +0.3 wt. % for magnesium and −0.3 to +0.5 wt. % for silicon the finely dispersed precipitates of the intermetallic phase Mg2Si results in high ductility.

Abstract: A first aluminum alloy of the present invention comprises Mg: 0.3-6 mass %, Si: 0.3-10 mass %, Zn: 0.05-1 mass %, Sr: 0.001-0.3 mass % and the balance being Al and impurities. A second aluminum alloy further contains one or more selective additional elements selected from the group consisting of Cu, Fe, Mn, Cr, Zr, Ti, Na and Ca. Furthermore, a third aluminum alloy comprises Mg: 0.1-6 mass %, Si: 0.3-12.5 mass %, Cu: 0.01 mass % or more but less than 1 mass %, Zn: 0.01-3 mass %, Sr: 0.001-0.5 mass % and the balance being Al and impurities. Furthermore, a fourth aluminum alloy further includes one or more optional additional elements selected from the group consisting of Ti, B, C, Fe, Cr, Mn, Zr, V, Sc, Ni, Na, Sb, Ca, Sn, Bi and In.

Abstract: An aluminum alloy for a die casting, used as the material of parts of an automotive vehicle. The aluminum alloy consists essentially of Si in an amount ranging from 10 to 12% by weight, Mg in an amount ranging from 0.15 to 0.50% by weight, Mn in an amount ranging from 0.5 to 1.0% by weight, Fe in an amount of not more than 0.15% by weight, Ti in an amount of not more than 0.1% by weight, Sb in an amount ranging from 0.05 to 0.20% by weight, B in an amount ranging from 0.005 to 0.02%, and balance consisting of aluminum and inevitable impurities.

Abstract: A process is described for producing an aluminum alloy sheet having excellent bendability for use in forming panels for automobiles. An aluminum alloy containing 0.50 to 0.75 by weight Mg, 0.7 to 0.85% by weight Si, 0.1 to 0.3% by weight Fe, 0.15 to 0.35% by weight Mn, and the balance Al and incidental impurities, is used and is semi-continuously cast into ingot. The cast alloy ingot is subjected to hot rolling and cold rolling, followed by solution heat treatment of the formed sheet. The heat treated sheet is quenched to a temperature of about 60-120° C. and the sheet is then coiled. This coil is then pre-aged by slowly cooling the coil from an initial temperature of about 60-120° C. to room temperature at a cooling rate of less than 10° C./hr.

Abstract: A process is described for producing an aluminum alloy sheet having excellent bendability for use in forming panels for automobiles. An aluminum alloy is used containing 0.5-0.75% by weight Mg, 0.7-0.85% by weight Si, 0.15-0.35% by weight Mn and 0.1-0.3% by weight Fe and the remainder Al and incidental impurities. The alloy is formed into ingot by semi-continuous casting and the cast alloy ingot is subjected to hot rolling and cold rolling, followed by solution heat treatment of the formed sheet. The sheet material is pre-aged by rapidly cooling from an initial pre-aging temperature of at least 80° C. to room temperature at a cooling rate of more than 5° C./hour.

Abstract: A shock absorbing material comprising an Al—Mg—Si series aluminum alloy having high strength and showing excellent energy absorbing property when compressed in the axial direction of extrusion is obtained. The shock absorbing material of the invention has a hollow cross section, mainly comprises a fibrous structure and can be manufactured by press quenching just after extrusion followed by aging. In the press quenching, press quenching under air-cooling advantageous in view of the dimensional accuracy or the cost can be adopted. Further, the shock absorbing material of the invention has excellent cracking resistance to a compressive load in the lateral direction as well as in the axial direction. The shock absorbing material of the invention is suitable as side members or bumper stays in the frame structures of automobiles.

Abstract: A hardened aluminum alloy, for use in the manufacture of printed circuit boards, having elevated levels of manganese and magnesium and produced as a sheet by a cold rolling process to a specified thickness.

Abstract: An aluminium-based alloy having 6.5-7.5 wt. % silicon and 0.35-0.50 wt. % magnesium as the major alloying elements and a method of manufacturing an article from the alloy are disclosed. The alloy is characterised by a microstructure in which &bgr; phase (Al5SiFe) that forms during heat treatment as a transformation product of &pgr; phase (Al8Si6Mg3Fe) is the sole or predominant iron-containing phase in the alloy.

Abstract: An alloy of composition in wt. % (see table (I)) and incidental impurities up to 0.05 each 0.15 total, balance A1. The alloy can be extruded at high speed to provide extruded sections which meet T5 or T6 strength requirements.

Abstract: Disclosed is an Al alloy for a welded construction having excellent welding characteristics, which Al alloy comprises 1.5 to 5 wt % of Si (hereinafter, wt % is referred to as %), 0.2 to 1.5% of Mg, 0.2 to 1.5% of Zn, 0.2 to 2% of Cu, 0.1 to 1.5% of Fe, and at least one member selected from the group consisting of 0.01 to 1.0% of Mn, 0.01 to 0.2% of Cr, 0.01 to 0.2% of Ti, 0.01 to 0.2% of Zr, and 0.01 to 0.2% of V, with the balance being Al and inevitable impurities. Also disclosed is a welded joint having this Al alloy base metal welded with an Al—Mg- or Al—Si-series filler metal.

Abstract: A population of extrusion billets has a specification such that every billet is of an alloy of composition (in wt. %): Fe <0.35; Si 0.20-0.6; Mn <0.10; Mg 0.25-0.9; Cu <0.015; Ti <0.10; Cr <0.10; Zn <0.03; balance Al of commercial purity. After ageing to T5 or T6 temper, extruded sections can be etched and anodized to give extruded matt anodized sections having improved properties.

Abstract: An aluminum-beryllium-silicon based alloy is disclosed, which comprises 5.0 to 30.0 mass % of Be. 0.1 to 15.0 mass % of Si and 0.1 to 3.0 mass %, the balance being Al and inevitable impurities. The alloy is useful for producing automobile engine parts, etc.

Abstract: A recrystallization-hardenable aluminum cast alloy includes in addition to aluminum the following elements as functional elements: (1) 5 to 10 weight % silicon, (2) 0.2 to 0.35 weight % magnesium, (3) 0.3 to 3 weight % nickel and/or 0.6 to 3 weight % cobalt, and impurities due to manufacturing.

Abstract: The diecasting alloy based on aluminium-silicon contains 9.5 to 11.5 w. % silicon 0.1 to 0.5 w. % magnesium 0.5 to 0.8 w. % manganese max 0.15 w. % iron max 0.03 w. % copper max 0.10 w. % zinc max 0.15 w. % titanium with the remainder aluminium and for permanent refinement 30 to 300 ppm strontium.

Abstract: A 6XXX series aluminium alloy containing Mg and Si is disclosed. The 6XXX series aluminium alloy is characterized in that the Mg and Si that is available to form MgSi precipitates is present in amounts such that the ratio of Mg:Si, on an atomic weight basis, is between 0.8:1 and 1.2:1.

Abstract: This invention relates to an aluminum alloy with B-rated or better machineability, said alloy being suitable for using as brazing in the Nocolock® process. The alloy consists essentially of: about 0.5-0.8 wt. % silicon; about 0.4-0.6 wt. % magnesium; about 0.4-0.72 wt. % tin; up to about 0.5 wt. % iron; up to about 0.3 wt. % copper; up to about 0.35 wt. % manganese; up to about 0.15 wt. % chromium; and up to about 0.2 wt. % zinc; the balance aluminum and incidental elements and impurities. This product is preferentially processed into one or more of the following tempers: T1, T5, T6, T651, T6510, T6511, T8, T851, and T9.

Abstract: A novel aluminum die-cast material having all good properties of high fluidity, good corrosion resistance and high mechanical strength is disclosed. As its Mg content, a factor to increase mechanical strength, is increased to fall between 0.4 and 0.6% by weight, the material has good mechanical properties. As its Cu content, a factor to cause corrosion, is reduced to at most 0.15% by weight, the material has good corrosion resistance to seawater. As its Si content, a factor to increase casting fluidity, is increased to fall between 10.0 and 11.5% by weight, the material has good fluidity.

Abstract: An aluminum-copper-zinc alloy having ancillary additions of lithium. The alloy composition includes from about 5 to 13 wt % zinc and from about 0.01 to 1.0 wt % lithium.

Abstract: An Al—Mg—Si based aluminum alloy extrusion having large strength, absorbable impact energy and resistance against compressing cracking, wherein the average size of Mg2Si precipitation in the [1 0 0] and [0 1 0] directions of the (1 0 0) plane inside grains is 20 nm or more, the distribution density of the Mg2Si precipitation in the [0 0 1] direction of the (1 0 0) plane is 100 or more per &mgr;m2, and the size of precipitations on grain boundaries is 1000 nm or less. Alternatively, in the Al—Mg—Si based aluminum alloy extrusion, a tensile strength obtained from a tensile test performed at a strain rate of 1000 per second is from 150 to 400 N/mm2 (both inclusive).

Abstract: The present invention provides a support for a lithographic printing plate prepared by cold rolling a sheet while intermediate annealing is omitted to save energy and the number of the cold rolling steps are decreased to simplify the sheet production steps and to give a desired strength of the sheet, and by inhibiting precipitation of Si particles in the substrate to give extremely excellent resistance to ink staining in the nonimage areas during printing, and a process for producing a substrate therefore. The production process comprises homogenization heat-treating an aluminum alloy slab comprising 0.10 to 0.40 wt % of Fe, 0.03 to 0.15 wt % of Si, 0.004 to 0.

Abstract: An aluminium casting alloy contains: 2.0 to 3.5 w. % magnesium 0.15 to 0.35 w. % silicon 0.20 to 1.2  w. % manganese max. 0.40 w. % iron max. 0.10 w. % copper max. 0.05 w. % chromium max. 0.10 w. % zinc  max. 0.003 w. % beryllium max. 0.20 w. % titanium max. 0.60 w. % cobalt max. 0.80 w. % cerium and aluminium as the remainder with further impurities individually max. 0.02 w. %, total max. 0.2 w. %. The aluminium alloy is particularly suitable for diecasting, thixocasting and thixoforging. A particular application is diecasting for components with high requirements for mechanical properties, as these are present even in the cast state and thus no further heat treatment is required.

Abstract: The present invention provides an improved process for continuously casting aluminum alloys and improved aluminum alloy compositions. The process includes the steps of continuously annealing the cold rolled strip in an intermediate anneal using an induction heater and/or continuously annealing the hot rolled strip in an induction heater. The alloy composition has mechanical properties that can be varied selectively by varying the time and temperature of a stabilizing anneal.

Abstract: An aluminum-based alloy useful for driveshaft assemblies and method of manufacturing an extruded tube of such alloy. The alloy includes, in weight %, 0.50 to 0.70% Si, up to 0.30% Fe, 0.20 to 0.40% Cu, up to 0.03% Mn, 0.80 to 1.10% Mg, up to 0.03% Cr, balance Al and impurities. In producing extruded tubing, the alloy is extruded, the extruded billet is water quenched, the quenched tube is drawn in a two-stage drawing operation and the drawn tube is given a precipitation hardening treatment.

Abstract: Compositions suitable for use as an inoculant for cast iron. The composition includes granules of intermetallic alloys selected from Al4Sr, Al2Sr, and AlSr. The composition consists essentially of 40 to 81 percent strontium by weight.

Abstract: There is claimed an aluminum alloy composition consisting essentially of: about 12-22 wt % silicon, about 2.5-4.5 wt % nickel, about 0.2-0.6 wt % magnesium, up to about 1.2 wt % manganese, up to about 1.2 wt % iron, and about 0.005-0.015 wt % phosphorus. This alloy composition may further contain up to about 0.25 wt % vanadium, up to about 0.2 wt % zirconium, up to about 0.25 wt % titanium, up to about 2 wt % cerium and/or mischmetal. Because of its high temperature strengths, said alloy is suitable for manufacturing into various cast automotive components, including vehicle disk brake frames and other parts.

Abstract: Alloy and cast alloy product ideally suited for use as a component in a vehicle frame or subframe, i.e., body-in-white, comprising an alloy consisting of about 2.80 to 3.60 wt. % magnesium, less than approximately 0.20 wt. % silicon, approximately 1.10 to 1.40 wt. % manganese, less than approximately 0.2 wt. % iron, less than approximately 0.15 wt. % titanium, about 0.0005 to 0.0015 beryllium, the balance substantially aluminum and incidental elements and impurities. The aluminum/magnesium alloy is typically solidified into ingot derived working stock by die casting into a shape suitable for remelt for die casting, which shape is typically an ingot billet. Excellent mechanical properties are obtained from a cast product that is not subjected to heat treating operations subsequent to casting.

Abstract: A process of producing an aluminum alloy sheet product suitable for forming into automotive parts and exhibiting reduced roping effects. The process involves producing an aluminum alloy sheet product by direct chill casting an aluminum alloy to form a cast ingot, homogenizing the ingot, hot rolling the ingot to form and intermediate gauge product, cold rolling the intermediate gauge product to form a product of final gauge, and subjecting the final gauge product to a solutionizing treatment by heating the product to a solutionizing temperature, followed by a pre-aging step involving cooling the product to a coiling temperature above 50.degree. C., coiling the cooled product at the coiling temperature, and cooling the coiled final gauge product from the coiling temperature above 50.degree. C. to ambient temperature at a rate less than about 10.degree. C. per hour to improve T8X temper characteristics of the product.

Abstract: A coating for a cylinder bore of a reciprocating engine with an iron, aluminum, or magnesium base comprises a hypereutectic aluminum/silicon alloy. The alloy is applied to a cylinder wall by thermal spraying.

Abstract: A superplastically formable, aluminum alloy product which consists essentially of about 2-10 wt. % magnesium; at least one dispersoid-forming element selected from the group consisting of: up to about 1.6 wt. % manganese, up to about 0.2 wt. % zirconium, and up to about 0.3 w. % chromium; at least one nucleation-enhancing element for recrystallization selected from: up to about 1.0 wt. % silicon, up to about 1.5 wt. % copper, and combinations thereof. Said alloy product has greater than about 300% elongation at a strain rate of at least about 0.0003/sec and a superplastic forming temperature between about 1000-1100.degree. F. due, in part, to the preferred thermomechanical processing steps subsequently applied thereto. A related method of manufacture is also disclosed herein.

Abstract: An aluminum alloy containing Si: 1.5-12% (mass % here and hereinafter), Mg: 0.5-6% and, optionally, at least one of Mn: 0.5-2%, Cu: 0.15-3% and Cr: 0.04-0.35% and, further, containing Ti: 0.01-0.1% and the balance of Al and inevitable impurities, in which the average grain size of crystallized grains of Si system compounds is from 2 to 20 .mu.m and an area ratio thereof is from 2 to 12%. The alloy is melted to obtain a cast ingot having DAS (Dendrite Arm Spacing) of 10 to 50 .mu.m, which is then put to a soaking treatment at 450 to 520.degree. C. and then to extrusion molding. The aluminum alloy has excellent machinability with no addition of low melting metals.

Abstract: Solid and liquid phases coexist in a semi-molten casting material. A plurality of composite-solid phases having liquid and solid phase regions and a plurality of single-solid phases exist as the solid phases in a mixed state in an outer layer portion of the semi-molten casting material. If the sectional area of the solid phase region is represented by A, and the sectional area of the solid phase region is represented by B in one of the composite-solid phases, the liquid phase enclosure rate P of the composite-solid phase is defined as being represented by P={B/(A+B)}.times.100 (%). The liquid phase enclosure rate P of the single-solid phase is equal to 0 (%). When two groups are selected from a class of the solid phases, for example, by first and second straight lines so as to include a plurality of the solid phases, average values M.sub.1 and M.sub.2 of liquid phase enclosure rates of, for example, six solid phases in each of the first and second groups are represented by M.sub.1 =(P.sub.1 +P.sub.2 - - - +P.

Abstract: The invention relates to a rolled or extruded AlMgMn aluminum alloy product for welded mechanical construction with the composition (% by weight): 3.0<Mg<65, 0.2<Mn<1.0, Fe<0.8, 0.05<Si<0.6, Zn<1.3, possibly Cr<0.15 and/or one or more of the elements Cu, Ti, Ag, Zr, V at a content of<0.30 each, other elements and inevitable impurities <0.05 each and <0.15 in total, in which the number of Mg.sub.2 Si particles between 0.5 .mu.m and 5 .mu.m, in size is between 150 and 2,000 per mm.sup.2, and preferably between 300 and 1,500 per mm.sup.2. The products according to the invention have good corrosion resistance and are used for structural applications such as for example, boats, offshore structures or industrial vehicles.

Abstract: The invention relates to a cylinder liner, cast into a reciprocating piston engine, of a highly hypereutectic aluminum/silicon alloy which is free of hard material particles independent of the melt and has such a composition that fine primary silicon crystals and intermetallic phases automatically form from the melt as hard particles. By spray-compacting, a blank of finely sprayed melt droplets is caused to grow, a fine distribution of the hard particles being produced by controlled introduction of small melt droplets. The blank can be transformed by an extrusion step into a form approximating the cylinder liner. After subsequent premachining with chip removal, the running surface is precision-machined and subsequently honed in at least one stage, after which the hard particles located in the running surface are exposed, plateau faces of the particles being formed, which faces protrude from the remaining surface of the matrix structure of the alloy.