Search Results for aluminum alloy 518.0

This datasheet provides information on key alloy metallurgy, processing effects on physical and mechanical properties, and applications of Al-Mg die-casting alloy 518.0. A figure presents die cast aluminum casting rotating-beam fatigue curve for 518.0-F alloy.

This article is an atlas of fractographs that helps in understanding the causes and mechanisms of fracture of cast aluminum alloys and in identifying and interpreting the morphology of fracture surfaces. The fractographs illustrate the brittle fracture, microvoid coalescence, fatigue striations, and microstructure of these alloys. The components considered include fractured sand-cast carrier trays, broken extension-housing yokes, helicopter tail-rotor drive assemblies, fractured bell-crank fittings, chain-hoist hooks, and automotive connecting rods.

This datasheet provides information on key alloy metallurgy, processing effects on physical and mechanical properties, and application characteristics of Al-Si-Mg general-purpose die-casting alloys 360.0 and A360.0.

This article begins with a discussion on the classification of aluminum alloys and the selection of alloy and temper based on machinability. It provides an overview of cutting force and power, tool design and material, and general machining conditions. In addition, the article discusses distortion and dimensional variation and machining problems during the machining of high-silicon aluminum alloy. It also provides information on tool design and material, speed and feed, and the cutting fluid used for various machining processes, namely, turning, boring, planing and shaping, broaching, reaming, tapping, milling, sawing, grinding, honing, and lapping. The article concludes with a discussion on drilling operations in automatic bar and chucking machines and drill presses.

This article contains a table that lists the values of nominal compositions and composition limits of aluminum alloy castings.

Aluminum casting alloys are the most versatile of all common foundry alloys and generally have the highest castability ratings. This article discusses the designation and classification of aluminum casting alloys based on their composition and the factors influencing alloy selection. Alloys discussed include rotor alloys, commercial duralumin alloys, premium casting alloys, piston and elevated-temperature alloys, general-purpose alloys, magnesium alloys, aluminum-zinc-magnesium alloys, and bearing alloys. Six basic types of aluminum alloys developed for casting include aluminum-copper, aluminum-copper-silicon, aluminum-silicon, aluminum-magnesium, aluminum-zinc-magnesium, and aluminum-tin. The article also describes the main casting processes for aluminum alloys, which include die casting, permanent mold casting, sand casting (green sand and dry sand), plaster casting, and investment casting. In addition, the article discusses factors affecting the mechanical and physical properties, microstructural features that affect mechanical properties, the effects of alloying, and major applications of aluminum casting alloys.

This article is a comprehensive collection of tables and curves that present data on the properties of aluminum castings. Data are presented to explain the physical properties such as ratings of castability, corrosion resistance, machinablity, and weldability for aluminum casting alloys. The article discusses the typical mechanical properties and mechanical-property limits for aluminum sand casting alloys, permanent mold casting and die casting alloys based on tests of separately cast specimens; and typical mechanical properties of premium-quality aluminum alloy castings and elevated-temperature aluminum casting alloys. It provides a list of the creep-rupture properties and fatigue strengths of separately sand cast test bars of alloy 201.0, alloy C355.0-T61, alloy A356.0-T61, and alloy 354.0-T61.

This article summarizes some general alloy groupings by application or major characteristics. The groupings include cast rotor, general-purpose, elevated-temperature, wear-resistant, moderate-strength, high-strength, and high-integrity die casting alloys and cast aluminum alloys bearings. A table lists selected applications for aluminum casting alloys.

The most widely accepted alloy and temper designation system for aluminum and its alloys is maintained by the Aluminum Association and recognized by the American National Standards Institute (ANSI) as the American National Standard Alloy and Temper Designation Systems for Aluminum (ANSI H35.1). This article provides a detailed discussion on the alloy and temper designation system for aluminum and its alloys. The Aluminum Association alloy designations are grouped as wrought and cast alloys. Lengthy tables provide information on alloying elements in wrought aluminum and aluminum alloys; nominal composition of aluminum alloy castings; typical mechanical properties of wrought and cast aluminum alloys in various temper conditions; and cross references to former and current cast aluminum alloy designations.

Commercial aluminum alloys are classified based on how they are made and what they contain. This article describes the ANSI H35.1 designation system, which is widely used to classify wrought and cast aluminum alloys. The ANSI standard uses a four-digit numbering system to identify alloying elements, compositional modifications, purity levels, and product types. It also uses a multicharacter code to convey process-related details on heat treating, hardening, cooling, cold working, and other stabilization treatments. The article includes several large tables that provide extensive information on aluminum alloy and temper designations and how they correspond to critical mechanical properties as well as other designation systems.

This article aims to comprehensively review and summarize the material properties and engineering data for aluminum alloy castings and their many applications. The discussion focuses on conventional sand, permanent mold, and die castings as well as the premium engineered versions of some alloys. The article provides a summary of aluminum casting alloy designations of The Aluminum Association, the Unified Numbering System, and specific alloys considered premium strength by definition and by ASTM International and Aerospace Material Specifications. A distillation of data from published industry sources is given for a wide range of the properties and performance characteristics for topics such as: physical and thermophysical properties, typical and minimum mechanical properties, fatigue resistance, fracture resistance, and subcritical crack growth.

Aluminum casting alloys are the most versatile of all common foundry alloys and generally have the highest castability ratings. Aluminum alloy castings are routinely produced by pressure-die, permanent-mold, green and dry-sand, investment, and plaster casting. This article describes factors affecting the selection of casting process and the general designation system for aluminum alloys. It provides useful information on mechanical test methods, selection of proper test specimens for accurate test methods, characteristics of premium engineered castings, and advantages of hot isostatic pressing.

Heat treatment of aluminum alloys is assessed by various quality-assurance methods that include metallographic examination, hardness measurements, mechanical property tests, corrosion-resistance tests, and electrical conductivity testing. The use of hardness measurements in the quality assurance of heat treated aluminum products is effectively used in conjunction with the measurement of surface electrical conductivity. This article provides a detailed discussion of the error sources in eddy-current conductivity measurements. It also presents useful information on the variation of electrical conductivity of alloy 2024 samples as a function of aging time at different isothermal holding temperatures.

This article begins with a discussion on the effects of alloying and impurity elements on the properties of aluminum cast alloys and their chemical compositions. It describes the various means of structural control, namely, chemistry control, control of element ratios based on the stoichiometry of intermetallic phases, and control of solidification conditions. The article discusses the modification and grain refinement of aluminum-silicon alloys by the use of modifiers and refiners to influence eutectic and hypereutectic structures in aluminum-silicon alloys. It provides information on foundry alloys for specific casting applications. The article concludes with a discussion on the heat treatment practices and properties of aluminum casting alloys.

This article discusses the corrosion resistance of aluminum and aluminum alloys in various environments, such as in natural atmospheres, fresh waters, seawater, and soils, and when exposed to chemicals and their solutions and foods. It describes the forms of corrosion of aluminum and aluminum alloys, including pitting corrosion, intergranular corrosion, exfoliation corrosion, galvanic corrosion, stray-current corrosion, deposition corrosion, crevice corrosion, filiform corrosion, stress-corrosion cracking, corrosion fatigue, and hydrogen embrittlement. The article also presents a short note on aluminum clad products and corrosion at joints.

Aluminum casting alloys are among the most versatile of all common foundry alloys and generally have high castability ratings. This article provides an overview of the common methods of aluminum shape casting. It discusses the designations of aluminum casting alloys categorized by the Aluminum Association designation system. The article summarizes the basic composition groupings of aluminum casting alloy and discusses the effects of specific alloying elements and impurities. The characteristics of the important casting processes are summarized and compared in a table. The article presents the advantages and disadvantages of green sand casting, permanent mold casting, semipermanent mold casting, and high-pressure die casting. A discussion on other casting processes, such as investment casting, lost foam, plaster mold casting, pressure casting, centrifugal casting, and semisolid casting, is also included.

Aluminum and its alloys are used in a broad range of applications. This article discusses the primary and secondary production of aluminum and the classification system for cast and wrought products. It describes some of the more common manufactured forms, including commercial wrought aluminum products, aluminum alloy engineered castings, powder metallurgy parts, and metal-matrix composites. The article also reviews fabrication characteristics such as machining, forming, forging, and joining. It concludes with a description of the major industrial applications of wrought and cast aluminum alloys.

More than 450 alloy designations/compositions have been registered by the Aluminum Association (AA) Inc. for aluminum and aluminum alloys. This article contains tables that list the designations and composition limits of wrought unalloyed aluminum and wrought aluminum alloys, and designations and composition limits for aluminum alloys in the form of castings and ingot. It provides helpful information on the Unified Numbering System (UNS) numbers and its corresponding AA numbers for aluminum and aluminum alloys, and the international alloy designations cross-referenced to its equivalent compositions of wrought AA alloys.

This article is a comprehensive collection of machining data, presented in tables, covering most of the commonly used machining operations including turning, face milling, end milling (peripheral), drilling, reaming, and tapping of several materials. It provides starting recommendations for the range of speeds and feeds for various machining operations, parameters for the selection of tool geometry, and guidelines on the selection and identification of cutting fluids.

Aluminum casting alloys are the most versatile of all common foundry alloys and generally have the highest castability ratings. This article provides an overview of the common methods of aluminum shape casting. These include gravity casting, die casting, sand casting, lost foam casting, shell mold casting, plaster casting, investment casting, permanent mold casting, squeeze casting, semisolid forming, centrifugal casting, and pressure die casting. The article presents several different factors on which the selection of a casting process depends. It discusses gating and risering principles in casting. The article concludes with information on premium engineered castings that provide higher levels of quality and reliability than in conventionally produced castings.