Search Results for UNS A93003

Nitric acid is a strongly oxidizing acid that is aggressively corrosive to many metals. Its oxidizing nature is affected by acid temperature and concentration, and composition of the alloy exposed to it. This article focuses on the corrosion behavior of various ferrous and nonferrous metals and alloys when exposed to a nitric acid environment. The ferrous and nonferrous metals and alloys discussed are carbon and alloy steels, stainless steels, aluminum alloys, titanium, zirconium alloys, niobium and tantalum, and nonmetallic materials.

This datasheet provides information on key alloy metallurgy, processing effects on physical and mechanical properties, fabrication characteristics, and applications of general engineering alloys 3003 and Alclad 3003.

This article outlines the processes by which materials are selected to prevent or control localized corrosion, galvanic corrosion, and intergranular corrosion. It reviews the operating conditions and the design of candidate materials for material selection. The article discusses various corrosion-resistant materials, including ferrous and nonferrous metals and alloys, thermoplastics, reinforced thermosetting plastics, nonmetallic linings, glass, carbon and graphite, and catalyzed resin coatings. It examines an unusual form of intergranular corrosion known as exfoliation, which occurs in aluminum-copper alloys. The article also describes three types of erosion-corrosion: liquid erosion-corrosion, cavitation, and fretting. It concludes with information on the various factors to be considered for material selection, including minimum cost or economic design, minimum corrosion, minimum investment, and minimum maintenance.

Pitting is a form of localized corrosion that is often a concern in applications involving passivating metals and alloys in aggressive environments. This article describes the test methods for pitting corrosion. These methods include ASTM G 48, ASTM F 746, ASTM G 61, ASTM G 100, and electrochemical noise measurements. The visual examination, metallographic examination, and nondestructive inspection of pits are discussed. The article reviews the procedures for the use of standard charts, metal penetration, statistical analysis, and loss in mechanical properties to quantify the severity of pitting damage.

This article focuses on the effects of microscopic organisms and the by-products they produce on the electrochemical corrosion of metals. The general characteristics of the microorganisms that facilitate their influence on the electrochemistry of corrosion are discussed. The industries most often reported as being affected by microbiological corrosion are listed, along with the organisms usually implicated in the attack. The article explains that the influence of organisms can be addressed successfully for a corrosion control program by using four types of evidence: metallurgical, microbiological, chemical, and electrochemical. It provides information on the microbiologically influenced corrosion (MIC) of irons and steels, passive alloys (austenitic stainless steels), aluminum alloys, copper alloys, and composites. The article reviews the formation of microbial biofilms and macrofouling films. It also describes the general approaches taken to prevent MIC.

Density allows for the conversion of uniform corrosion rates from units of weight (or mass) loss per unit area per time to thickness per unit time. This article contains a table that lists the density of metals, such as aluminum, copper, iron, stainless steel, magnesium, and lead, and their alloys.

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

This article summarizes the characteristics, material properties, and typical applications of aluminum alloy wrought products. It describes the most widely used worldwide alloy designation system and discusses five major categories, namely flat-rolled products; rod, bar, and wire; tubular products; shapes; and forgings. The article also discusses three widely used indexes to define the fracture resistance of aluminum alloys: notch toughness, tear resistance, and plane-strain fracture toughness. It also describes three types of corrosion attack of these alloys: general or atmospheric surface corrosion, stress-corrosion cracking, and exfoliation attack.

This article discusses the chemical composition, mechanical, physical, thermal, electrical, optical, and magnetic properties of a variety of grades of wrought aluminum and aluminum alloys. It also discusses the standard specifications, mass and fabrication characteristics, corrosion resistance, and applications of a variety of grades of wrought aluminum and 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.

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.

Aluminum and its alloys are highly corrosion resistant, protected by a self-healing oxide film that effectively passivates the underlying surface. This article examines the various processes by which the protective layer can be breached and the types of corrosion that can occur. It describes pitting, galvanic, and atmospheric corrosion as well as stress-corrosion cracking, corrosion fatigue, and erosion corrosion. It also covers intergranular, exfoliation, filiform, deposition, and crevice corrosion and special cases of corrosion in soils, seawater, and automotive coolant systems. The article provides an extensive amount of data as well as information on coatings, claddings, and cathodic protection methods; the effects of composition, microstructure, and surface treatments; and the compatibility of aluminum with food and various household and industrial chemicals.

This article contains tables that list typical room-temperature physical properties of wrought aluminum alloys in engineering units and metric units.

A four-digit numerical designation system is used to identify wrought aluminum and aluminum alloys. In addition to providing a detailed account of the temper designation system for aluminum and aluminum alloys, this article describes wrought and cast aluminum and aluminum alloy designations. It also tabulates the grade designations and compositions of wrought and cast aluminum and aluminum alloys. The article provides information on cross-referencing of aluminum wrought and ingot/cast products according to composition, per the Aluminum Association, Unified Numbering System (UNS) and International Organization for Standardization (ISO) standards.