This numbering system is not limited to the oil and gas industry. The unified numbering system uns was developed by astm and sae to correlate different numbering systems for commercial metals and alloys. This new edition provides an overall designation system for thousands of metals and alloys in commercial use. Theunified numbering system for metals and alloys uns provides a means of correlating many internationally used metal and alloy. Each uns number relates to a specific metal or alloy and defines its specific. The uns for metals and alloys provides a means of correlating many internationally used metal and alloy numbering systems administered by societies, trade. Update uns norm materials april 2010 imds information pages. Unified numbering system an overview sciencedirect topics. The unified numbering system, why designate a materials. 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. The system assigns numbers to alloys on the basis of composition only. 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.
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 widely used in. This document is available in either paper or pdf format. By using the uns, you can be sure you are speaking the same language as your customers and suppliers. Introduction to the unified numbering system of ferrous. Uns is a system of designations established in accordance with astm e 527 and sae j1086, recommended practice for numbering metals and alloys. 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. Astme527 standard practice for numbering metals and. 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. Join more than 90,000 members around the world who know they can rely on sae for. Formatting citations in sae technical papers saes publications team is committed to listening to and acting upon the concerns of our contributors. New edition of uns book for metals and alloys available.
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. This system avoids the confusion caused by the use of more than one. Astm e527 16 standard practice for numbering metals and alloys. The administration of the uns system is shared by sae and astm. 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. Standard practice for numbering metals and alloys in the uni. How can properties be modified by post heat treatment. 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. The unified numbering system for metals and alloys provides methods of correlating many internationally used metal and alloy numbering systems currently.
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. This sae recommended practice describes a unified numbering system uns for metals and alloys which have a commercial standing see6. Standard practice for numbering metals and alloys uns. Section 3 outlines the organization established for administering. 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. 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. 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. Introduction to the unified numbering system of nonferrous metals and alloys. Section 2 describes the system of alphanumeric designations or numbers established for each family of metals and alloys. Numbering system for metals and alloys, a joint astmsae publication, pcn 0505600101. Each metal is indicated by a letter that is followed by five numbers. 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. Aws standards can be obtained from global engineering. Unified alloys has taken actions to address concerns stemming from the covid19 pandemic.
Astme527 standard practice for numbering metals and alloys in the unified numbering system uns aluminum alloy numbering system. What are some of the common fabrication techniques. How are metal alloys classified and how are they used. Astm e52716 standard practice for numbering metals 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 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. Introduction to the unified numbering system index to uns designations by base elements listing of uns numbers assigned to date.
These data are presented to facilitate general compari. Uns unified number system cross reference list unified. 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. 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. Specification for nickel and nickelalloy bare welding. E52716 standard practice for numbering metals and alloys in the unified numbering system uns unified numbering system iron alloys nonferrous alloys rare earth metals. Specification for nickel and nickel alloy bare welding electrodes and rods supersedes ansiaws a5.
Metals and alloys in the unified numbering system uns. 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. Standard practice for numbering metals and alloys in the. Annex aguide to aws specification for nickel and nickel alloy bare welding electrodes and rods. 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. Unified numbering system uns for metals and alloys azom.
Astm and ansi jointly developed the unified numbering system for metals and alloys. In most cases the letter is suggestive of the family of metals identified. Each uns number consists of a single letter prefix followed by five digits. 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 unified numbering system uns is an alloy designation system widely accepted in north america.
To date, it hasnt exactly caught on like wildfire in industry, but over time you may see more of it. During the early 20th century many different metal alloys were developed in isolation. Unified numbering system uns for copper and copper alloys. Unified numbering system for ferrous metals and alloys. The uns has become a shorthand descriptor that allows users and suppliers to understand material callouts across industries and applications while preservperformance. The sae steel grades system is a standard alloy numbering system sae j1086 numbering metals and alloys for steel grades maintained by sae international in the 1930s and 1940s, the american iron and steel institute aisi and sae were both involved in efforts to standardize such a numbering system for steels.
Precise composition with impurity limits and performance specifications are not guaranteed by the uns system. Other common designations like those developed by the alloy asting institute classify materials based on their application and chemistry. These efforts were similar and overlapped significantly. The unified numbering system uns is a compositionbased system of commercial materials. How do properties vary throughout a piece of material that has been quenched, for example. Unified numbering system for metals and alloys what it is, why it was conceived, and how it was developed. Mfg 195 final exam tf questions flashcards quizlet. 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. 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. Introduction to the unified numbering system of nonferrous. Presently, sae is the primary administrator of the system. 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. 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.