Metals and alloys in the unified numbering system uns. Unified alloys has taken actions to address concerns stemming from the covid19 pandemic. The unified numbering system, why designate a materials. Introduction to the unified numbering system of nonferrous metals and alloys. This system avoids the confusion caused by the use of more than one. The unified numbering system uns of metals and alloys was developed by the american national standards instituteansi in 1974 to uniformly number commercial metals and alloys in the united states. Annex aguide to aws specification for nickel and nickel alloy bare welding electrodes and rods. Uns is a system of designations established in accordance with astm e 527 and sae j1086, recommended practice for numbering metals and alloys. These standard metals are selected on the basis of serving the significant metal lurgical and engineering needs of fabricators and users of metal products. The administration of the uns system is shared by sae and astm. The unified numbering system uns is an alloy designation system widely accepted in north america.
Astme527 standard practice for numbering metals and alloys in the unified numbering system uns aluminum alloy numbering system. With a description of the system and a cross index of chemically similar specifications and a great selection of related books, art and collectibles available now at. As mentioned above, the unified numbering system for metals and alloys uns was developed by astm and sae in an effort to clear up the alphabet soup problem. Astme527 standard practice for numbering metals and. Metals and alloys in the unified numbering system uns axxxxx aluminum and aluminum alloys updated cxxxxx copper and copper alloys updated dxxxxx specified mechanical properties steels not updated exxxxx rare earth and similar metals and alloys not updated fxxxxx cast irons not updated. How can properties be modified by post heat treatment. Unified numbering system for ferrous metals and alloys. Standard practice for numbering metals and alloys in the uni. The unified numbering system uns is a compositionbased system of commercial materials. For example, brasses are copper alloys with zinc as the principal addition. Numbering system for metals and alloys, a joint astmsae publication, pcn 0505600101. Over the past few years, weve received feedback from technical paper authors who have expressed a need and desire of being cited in recognized impactful journals this has.
Astm and ansi jointly developed the unified numbering system for metals and alloys. What are some of the common fabrication techniques. The unified numbering system for metals and alloys provides methods of correlating many internationally used metal and alloy numbering systems currently. Its purpose is to provide means of correlating systems in use by such organizations as american society for testing materials astm and aluminum association aa, as well as. Total materia is the worlds most comprehensive database of metals steel, iron, ferrous alloys, aluminum, copper, titanium, magnesium, tin, zinc, lead, nickel and nonmetallic materials polymers, composites and ceramics. Introduction to the unified numbering system index to uns designations by base elements listing of uns numbers assigned to date. Based on chemical composition, it arranges alloys into groups by major alloying elements. Today these designations have been expanded to five digits, following a prefix letter c, and made a part of the unified numbering system for metals and alloys which is jointly managed by the american society for testing. How are metal alloys classified and how are they used. Each uns number relates to a specific metal or alloy and defines its specific chemical composition, or in some cases a specific mechanical or physical property. During the early 20th century many different metal alloys were developed in isolation. The unified numbering system uns was developed by astm and sae to correlate different numbering systems for commercial metals and alloys the uns number is not a specification it is an identification number for a metal or alloy specified elsewhere.
The unified numbering system uns for metals and alloys is an alloy identification system which was jointly developed by the astm international formerly the american society for testing and materials and the society of automotive engineers to provide a means of correlating many internationally used metal and alloy numbering systems administered by various societies, trade associations and. The unified numbering system uns is an alloy identification system created in the early 1970s and formalized with the issuance of joint standard astm e527 and sae j1086 in august of 1974. The unified numbering system uns for metals and alloys provides a means of correlating internationally used metal and alloy numbering systems administered by societies, trade associations, and individual users and producers of metals and alloys. Unified numbering system an overview sciencedirect topics. Theunified numbering system for metals and alloys uns provides a means of correlating many internationally used metal and alloy. To date, it hasnt exactly caught on like wildfire in industry, but over time you may see more of it. The unified numbering system uns for metals and alloys is established to correlate several internationally used alloy and metal numbering systems, which are now commonly used by trade associations, societies and producers and users of alloys and metals.
Join more than 90,000 members around the world who know they can rely on sae for. The uns for metals and alloys provides a means of correlating many internationally used metal and alloy numbering systems administered by societies, trade. This sae recommended practice describes a unified numbering system uns for metals and alloys which have a commercial standing and covers the procedure by which such numbers are assigned. This numbering system is not limited to the oil and gas industry. Metals and alloys in the unified numbering system 11th edition. By using the uns, you can be sure you are speaking the same language as your customers and suppliers.
The uns has become a shorthand descriptor that allows users and suppliers to understand material callouts across industries and applications while preservperformance. The unified numbering system uns of metals and alloys was developed by the american national standards institute ansi in 1974 to uniformly number commercial metals and alloys in the united states and is administered jointly by the society of automotive engineers sae and american. Uns unified number system cross reference list unified. Unified numbering system uns for copper and copper alloys. The system assigns numbers to alloys on the basis of composition only. Section 3 outlines the organization established for administering. These data are presented to facilitate general compari. E52716 standard practice for numbering metals and alloys in the unified numbering system uns unified numbering system iron alloys nonferrous alloys rare earth metals. Standard practice for numbering metals and alloys uns. The unified numbering system uns was developed by astm and sae to correlate different numbering systems for commercial metals and alloys. Unified numbering system uns for metals and alloys azom. This sae recommended practice describes a unified numbering system uns for metals and alloys which have a commercial standing see6. Other common designations like those developed by the alloy asting institute classify materials based on their application and chemistry. Our priority continues to be protecting the health and safety of our staff, clients, colleagues and the communities where we operate while limiting business disruptions.
How do properties vary throughout a piece of material that has been quenched, for example. Each uns number relates to a specific metal or alloy and defines its specific. Each metal is indicated by a letter that is followed by five numbers. Each uns number consists of a single letter prefix followed by five digits. These efforts were similar and overlapped significantly.
Introduction to the unified numbering system of ferrous. The sources that have been most helpful are the metal and alloy producers, alloy digest, woldmans engineering alloys, international nickels publications and unified numbering system for metals and alloys. This new edition provides an overall designation system for thousands of metals and alloys in commercial use. Unified numbering system uns for metals and alloys. Standard practice for numbering metals and alloys in the. Specification for nickel and nickel alloy bare welding electrodes and rods supersedes ansiaws a5. Precise composition with impurity limits and performance specifications are not guaranteed by the uns system. Aws standards can be obtained from global engineering. The unified numbering system provides a quick and easy way to crossreference the many different numbering systems used to identify the thousands of metals and alloys in commercial use.
Organization of uns the uns, jointly sponsored by the american society for testing and materials astm and the society of automotive engineers sae, is operated in accordance with astm e527sae j 1086, recommended practice for numbering. The unified numbering system for metals and alloys uns provides means of correlating many internationally used metal and alloy numbering systems currently administered by societies, trade associations, and those individual users and producers of metals and alloys. In most cases the letter is suggestive of the family of metals identified. Unified numbering system uns is a system of designations established in accordance with astm e527 and sae j1086, recommended practice for numbering metals and alloys. Presently, sae is the primary administrator of the system. Astm e52716 standard practice for numbering metals and. The unified numbering system for metals and alloys provides methods of correlating many internationally used metal and alloy numbering systems currently published by engineering bodies, societies, trade associations, and producers of metals and alloys. Unified numbering system for metals and alloys what it is, why it was conceived, and how it was developed. Astm e527 16 standard practice for numbering metals and alloys.
Section 2 describes the system of alphanumeric designations or numbers established for each family of metals and alloys. New edition of uns book for metals and alloys available. Formatting citations in sae technical papers saes publications team is committed to listening to and acting upon the concerns of our contributors. This document is available in either paper or pdf format. A phase diagram is a graphic representation of the components present in an alloy system at various temperatures and percentages of the alloying chemical elements. Mfg 195 final exam tf questions flashcards quizlet. Update uns norm materials april 2010 imds information pages. Description of numbers established for metals and alloys the unified numbering system uns establishes 18 series of numbers for metals and alloys, as shown in table 1.
1622 14 783 1210 272 339 215 968 154 1374 717 682 1432 840 1587 314 1360 1217 260 284 1065 654 1409 1541 1283 1241 589 1396 1169 1357 167 1198 1194 12 1173 756 1413 1363 520 479 1348 913 305 1231 665 436