Introduction to the unified numbering system index to. For carbon steels, the uns designation starts with the letter g, followed by the four numbers of the saeaisi system, usually. Astm ds56 metals and alloys in the unified numbering system. The unified numbering system for metals and alloys uns provides a 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. The unified numbering system uns is an alloy designation system widely accepted in north america. 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. Each uns number relates to a specific metal or alloy and. Metals and alloys in the unified numbering system, published jointly by astm and sae, lists over 5000 uns des ignations in the recently published ninth. 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. Unified numbering system an overview sciencedirect topics. The uns is managed jointly by the astm international and sae international. The resultant report, which stated that a unified numbering system for metals and alloys was definitely possible and beneficial, was submitted to the u.
The unified numbering system uns is an alloy designation system widely accepted. The uns for metals and alloys provides a means of correlating many internationally used metal and alloy numbering systems administered by societies, trade associations, and individual users and producers of metals and alloys. Introduction to the unified numbering system of nonferrous. Unified numbering system uns for metals and alloys. The ins is an open list, subject to the inclusion of additional additives or removal of existing ones on an ongoing basis. Shown below is the table of different uns categories 8. From wikipedia, the free encyclopedia the society of automotive engineers sae designates sae steel grades. Introduction to the unified numbering system index to uns designations by base elements listing of uns numbers assigned to date with description of each material covered and references to documents in which the same or similar materials are described cross index of commonly known documents. The system assigns numbers to alloys on the basis of composition only. Today, the plc is about the only device that uses the octal numbering system. The first three digits often match older threedigit numbering systems, while the last two digits indicate more modern variations. You can make ads in the engineering toolbox more useful to you.
Astm e52716 standard practice for numbering metals and. Standard practice for numbering metals and alloys uns. Unified alloys has taken actions to address concerns stemming from the covid19 pandemic. The uns designation system has been a highly successful venture from many standpoints. The uns number short for unified numbering system for metals and alloys is a systematic scheme in which each metal is designated by a letter followed by five numbers. Appendix h numbering systems h4 numbering systems dl405 user manual, 4th edition, rev. Unified numbering system for ferrous metals and alloys. Metals and alloys in the unified numbering system uns. A generally useful system of steel designation is the unified numbering system uns, which incorporates the traditional society of automotive engineers sae and american iron and steel institute aisi systems. Uns designation assignors report immediately to the office of the unified numbering system for metals and alloys the details of each new assignment for inclusion into the system. To get a uns number an alloy has to be a commercial standing product with 2 or more producers with a combined production of 200 tons per year.
There is no definition of mechanical or other properties. Most astm and asme standards list the steel grades by their uns unified numbering system numbers but also make reference, where appropriate to the more general aisi american iron and steel institute grade designations. The uns number is not in itself a specification, since it establishes no requirements for form, condition, quality, etc. 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. The term unified numbering system uns was coined by the board. Other common designations like those developed by the alloy asting institute classify materials based on their application and chemistry. Unified numbering system images, unified numbering system. Astm e527 16 standard practice for numbering metals and. An additional letter is sometimes added between the second and third digits of the code groups such as 11l41, 12l14 or 50b40. This new edition provides an overall designation system for thousands of metals and. An advisory board was set up by astm and sae in april 1972 to further work on the numbering system. 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 binary, hexadecimal, and octal number systems finite representation of unsigned integers finite representation of signed integers finite representation of rational numbers if time why. Chemical compositions of aisi astmasme and uns austenitic stainless steel grades introduction aisi astm asme and uns. Every effort was made to keep things down to earth, this sites not perfect and theres no frills, just info and lots of it. A octal numbering system many of the early computers used the octal numbering system for compiled printouts. The information is published in the document class names and the international numbering system for food additives, first published in 1989, with revisions in 2008 and 2011. In an attempt to create a single, comprehensive system for designating metals and alloys the astm and sae have jointly developed the unified numbering system uns. A number in parentheses indicates the year of last reapproval. It is a compositionbased system of commercial materials and does not guarantee any performance specifications or exact composition with impurity limits. The system encompasses all commercially sold alloys and metals. Unified numbering system uns for copper and copper alloys. Uns unified number system cross reference list unified. This page is about the meanings of the acronymabbreviationshorthand uns in the business field in general and in the products terminology in particular.
Introduction to the sae aisi steel numbering system the. Standard practice for numbering metals and alloys in the unified numbering system uns 1. Theunified numbering system for metals and alloys uns provides a means of correlating many internationally used metal and alloy. Unified numbering system numbering system for metals and alloys. If you find this website valuable and appreciate it is open and free for everybody please contribute by. These are four digit numbers which represent chemical composition standards for steel specifications. There may be 10 20 asme and the same in astm and asm. Unified numbering system uns uns uses a prefix letter and a fivedigit numbering system designed to correlate the different numbering systems for alloys and metals that are commercially used by various nations and standards organisations 5. 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. 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 society for testing and materials astm. The unified numbering system uns of metals and alloys was developed by the. The approach has been updated to that it is consistent with the numbering method developed by uns. It has provided satisfactory solutions to the six problem areas discussed earlier in this article. 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.
These designations often apply to specific products, for example a548 is applicable to coldheading quality carbon steel wire for tapping or sheet metal screws. Metals and alloys in the unified numbering system 11th edition. Numbering metals and alloys uns 1 this standard is issued under the. 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. International numbering system for food additives wikipedia. Description of numbers or codes established for metals and alloys 2.
Dec 20, 2017 table 1 shows the saeaisi steel numbering designation system. A power programmer must know number systems and data representation to fully understand cs primitive data types. Introduction to the astm designation system total materia. The octal numbering system uses 8 values to represent numbers. The unified numbering system for metals and alloys uns provides a means of correlating many internationally used metal and alloy numbering systems administered by societies, trade associations, and individual users and producers of 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 standard j434 is commonly used for specifying automotive ductile iron castings. Unified numbering system uns for metals and alloys azom. Astms designation system for metals consists of a letter a for ferrous materials followed by an arbitrary sequentially assigned number. Uns norm materials page 1 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. The unified numbering system uns was developed by astm and sae to correlate different numbering systems for commercial metals and alloys. Aisisae steel numbering system engineering toolbox. E52712 standard practice for numbering metals and alloys in the unified numbering system uns.
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