The resultant report, which stated that a unified numbering system for metals and alloys was definitely possible and beneficial, was submitted to the u. Due to this classification, the dictionary definition of stainless steel was an alloy of iron and at least four percent chromium. The sae steel grades system is a standard alloy numbering system for steel grades maintained by sae international. The last two numbers indicate the amount of carbon in the alloy, where the digits 10, for example, represent 0. Cold drawn carbon steel is typically numbered with the prefix 10 in the aisi numbering system, followed by two numbers that represent the nominal percentage of carbon in the product up to 100%.
Aisispecifications for the design of coldformed steel structural members. 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. P page 1 p section p chemical analyses of standard sizes. Uns is a system of designations established in accordance. 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.
Metals and alloys in the unified numbering system uns. The first two numbers indicate the alloy according the the chart below. Designation by the aisi numbering systemnamely 200, 300, and 400 series numbers 3. A member that resists design loads factored loads, as required by the applicable building code, except when defined as a nonstructural member. 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. Aisisae steel numbering system chart numbering system. Bar data handbook aisisae chemical compositions and metallurgical data. For all of the published test procedures prior to 2002, the year 2002 is assigned. Unified numbering system an overview sciencedirect topics. Table 1 shows the sae aisi steel numbering designation system additional letters added between the second and third digits include b when boron is added between 0.
It states the chemical composition of an alloy based on ladle analysis but does not indicate other properties. The temper designation system addresses the material conditions called tempers. The sae steel grades system is a standard alloy numbering system sae j1086 numbering. Prior to 1995 the aisi was also involved, and the standard was designated the aisisae steel grades. Aisi is the most popular and the oldest numbering system for all steels in the us.
In this chapter, the steels thus classified have aisisae before the steel code number, for example, aisisae. Radial ball bearing nomenclature and numbering system. The unified numbering system, which was developed by american society for testing and materials astm and society of automotive engineers sae to apply to all commercial metals and alloys. Aisi steel grades are usually a four digit number where the first two digits indicate the alloy and the second two the the carbon content. Introduction to the astm designation system total materia. The traditional aisi stainless steel products manual, currently published by the iron and steel society 14, provides a listing of stainless steel grades, composition, and properties. The temper designation system is an extension of the alloy numbering system and consists of a series of letters and numbers which follow the alloy designation number and are connected by a hyphen. Uns norm materials page 17 aisi or sae number of the. Aisisae stainless steel naming and numbering system gpss. Aisi utilises a fourdigit numbering system for carbon steels and a threedigit numbering system for stainless steels, having a type prefix for. It mainly describes standards and practices that can be at the base of designing, constructing, and characterising automotive components. Introduction to the saeaisi designation system total. Generally carbon adds hardness to the material which improves wearability.
North american standard for coldformed steel framing nonstructural members v aisi committee on framing standards richard haws, chairman nuconsteel steve fox, vice chairman canadian sheet steel building institute helen chen, secretary american iron and steel institute don allen steel stud manufacturers association. North american specification for the design of coldformed steel structural members, 2016 edition v preface the north american specification for the design of coldformed steel structural members as its, name implies, is intended for use throughout canada, mexico, and the united states. Dec 20, 2017 table 1 shows the sae aisi steel numbering designation system. A member in a steelframed system that is not a part of the gravity load resisting system, lateral force resisting system or building envelope. Some steel grades contain suffixes that indicate the modifications in the composition, such as type 303se, showing the addition of selenium into the composition.
G450 compare to scm435 gost gosudarstvennii obscesoiuznii standard. Scribd is the worlds largest social reading and publishing site. An additional letter is sometimes added between the second and third digits of the code groups such as 11l41, 12l14 or 50b40. The aisi stopped being involved because it never wrote any of the specifications. Introduction to the sae aisi steel numbering system. Uns is a system of designations established in accordance with astm e 527 and sae j1086, recommended practice for. Figure 1 demonstrates that the sae aisi system uses a fourdigit number to designate a carbon and alloy steel and refers to its specific chemical composition. A new standard numbering system has been introduced for standards developed by aisi. A fourdigit number is usually given to the aisi alloy steels and. There are also a number of grades known by common names that resemble aisi designations but that are not formally recognized by aisi. The unified numbering system uns steel standards are very similar to the aisi standards because they are simply a renumbering of the underlying aisi standards.
In most cases the letter is suggestive of the family of metals identi. Numbering system, th edition 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. Table 1 shows the sae aisi steel numbering designation system. Aisi and sae carbon and alloy steels except tool steels. Aisisae steel numbering system engineering toolbox. Aisisae steel numbering system aisisae steel numbers aisisae steel numbers are indicated below. The system assigns numbers to alloys on the basis of composition only. Astm e527 16 standard practice for numbering metals and.
Full sae aisi steel identification system hyde industrial blade. An advisory board was set up by astm and sae in april 1972 to further work on the numbering system. Prior to 1995 the aisi was also involved, and the standard was designated the aisi sae steel grades. The basic index system for the various types of sae and aisi steel are. American iron and steel institute, aisi manual coldformed steel design 2002 edition 2003. The unified numbering system uns is an alloy designation system widely accepted in north america. 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. Its purpose is to provide a means of correlating systems in use by such organizations as american iron and steel institute. 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. Another use of astm grade designators is found in pipe, tube, and forging products, where the first letter p refers to pipe, t refers to tube, tp may refer to tube or pipe, and f refers to forging.
Uns is a system of designations established in accordance with astm e 527 and sae j1086, recommended practice for numbering metals and alloys. Aisisae classifications of steels base metals code designations and filler metal classifications as per aisi, sae, asme and csa aisi american iron and steel institute sae society of automotive engineers asme american society of mechanical engineers csa canadian standards association aisisae classification of steels. Join more than 90,000 members around the world who know they can rely on sae for. Trade nameswhich are generally used with proprietary or special analysis stainless steels 5. Introduction to the sae aisi steel numbering system the. Steelspecification number a system of numbers developed by the aisi. Carbon steels and alloy steels are designated by a four digit number, where the first digit. Additional letters added between the second and third digits include b when boron is added between 0. The boundary dimensions for certain series of bearings are defined in various standards, such as abma, jis and iso. Aisi test procedures for coldformed steel structural members. This means that 1xxx groups within the saeaisi system. North american specification for the design of coldformed steel structural members, 2016 edition iii dedication this edition of aisi s100 is dedicated to roger l.
You can make ads in the engineering toolbox more useful to you. As a result, you will see older plans refer to aisi sae steel grades. The term unified numbering system uns was coined by the board. The prefix m is used to designate merchant quality steel. Back in the 1930s and 1940s, the standards organization sae international and the american iron and steel institute aisi began working to standardize a numbering system for stainless steel. Jul 24, 2010 the aisi sae steel numbering system has some logic to it that will help you identify some key points right away even if you are not familiar with a particular grade. The aisi numbering system for stainless steels consisted of a 300 series for chromiumnickel austenitic alloys, a 400 series for highchromium ferritic and martensitic alloys, and a 500 series for 46% chromium alloys. There is a possibility that aisi grades are quoted as sae grades and very often the same steel identification number is present in aisi sae standards. Designation by the unified numbering system, which astm and sae developed to apply to all commercial metals and alloys 4. Schematic representation of aisi sae steel designation system. In the 1930s and 1940s, the american iron and steel institute aisi and sae. 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. 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. In the 2002 edition of the aisi coldformed steel design manual aisi 2002, an identifying numbering system was established as aisi ts followed by a sequence number and the year when the test procedure was published or updated.
If you find this website valuable and appreciate it is open and free for everybody please contribute by. Table 1 shows the saeaisi steel numbering designation system. A basic fourdigit system is used by the sae system to designate the chemical composition of alloy steels and carbon steels. Figure 1 demonstrates that the saeaisi system uses a fourdigit number to designate a carbon and alloy steel and refers to its specific chemical composition. Aisisae steel numbering system chart numbering system for. The aisi sae steel numbering system has some logic to it that will help you identify some key points right away even if you are not familiar with a particular grade. Such a steel is identified by inserting the letter l between the second and third numeral of the aisi number.
For stainless steel, sae utilises a fivedigit numbering system, the last three numbers of which are in compliance with the designations of aisi alloy standards 5. Aisi sae classifications of steels base metals code designations and filler metal classifications as per aisi, sae, asme and csa aisi american iron and steel institute sae society of automotive engineers asme american society of mechanical engineers csa canadian standards association aisi sae classification of steels. Sae steel properties designation system hastings machine. Table 1 shows the saeaisi steel numbering designation system additional letters added between the second and third digits include b when boron is added between 0. For example 10xx are plain carbon steel, 41xx chromium molybdenum steel and 43xx nickel chromium molybdenum steel. Types 304, 316, 410 and others are based on the sae designation system for stainless steels see sae and former aisi description that follows. For carbon steels, the uns designation starts with the letter g, followed by the four numbers of the saeaisi system, usually. Standard practice for numbering metals and alloys uns. Aisi acknowledges the technical information provided by the steel deck institute in the. Understanding the aluminum alloy designation system. Metals and alloys in the unified numbering system uns axxxxx aluminum and aluminum alloys updated cxxxxx copper and copper alloys updated.
There are many different numbering systems used in the bearing industry today. Available in aisi 304 stainless steel for generalpurpose applications available in aisi 316 stainless steel for the most corrosive environments other lengths available, contact panduit customer service. North american specification for the design of coldformed. As a result, you will see older plans refer to aisisae steel grades. Aisi utilises a fourdigit numbering system for carbon steels and a threedigit numbering system for stainless steels, having a type prefix for identification. Introduction to the saeaisi designation system total materia article. The only minor differences between the two standards are the fact that the uns standard typically possesses an extra letter in the front of the specification in this case s for.
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