ASTM E527金属及合金统一数字编号系统（UNS）

Designation: E 527 – 83 (Reapproved 2003) Standard Practice for Numbering Metals and Alloys (UNS)1 This standard is issued under the fixed designation E 527; the number immediately following the designation indicates the year of original adoption or, in the case of revision, the year of last revision. A number in parentheses indicates the year of last reapproval. A superscript epsilon (e) indicates an editorial change since the last revision or reapproval. This standard has been approved for use by agencies of the Department of Defense. 1. Scope 1.1 This practice (Note 1) covers a unified numbering system (UNS) for metals and alloys that have a “commercial standing” (see Note 2), and covers the procedure by which such numbers are assigned. Section 2 describes the system of alphanumeric designations or “numbers” established for each family of metals and alloys. Section 3 outlines the organization established for administering the system. Section 4 describes the procedure for requesting number assignment to metals and alloys for which UNS numbers have not previously been assigned. NOTE 1—UNS designations shall not be used for metals and alloys that are not registered under the system described herein, or for any metal or alloy whose composition differs from those registered. NOTE 2—The terms “commercial standing,’’ “production usage,’’ and others are intended to portray a material in active industrial use, although the actual amount of such use will depend, among other things, upon the type of materials. (Obviously gold will not be used in the same “tonnages’’ as hot-rolled steel.) Different standardizing groups use different criteria to define the status that a material has to attain before a standard number will be assigned to it. For instance, the American Iron and Steel Institute requires for stainless steels “two or more producers with combined production of 200 tons per year for at least two years’’; the Copper Development Association requires that the material be “in commercial use (without tonnage limits)’’; the Aluminum Association requires that the alloy be “offered for sale (not necessarily in commercial use)’’; the SAE Aerospace Materials Division calls for “repetitive procurement by at least two users.’’ While it is apparent that no hard and fast usage definition can be set up for an all-encompassing system, the UNS numbers are intended to identify metals and alloys that are in more or less regular production and use. A UNS number will not ordinarily be issued for a material that has just been conceived or that is still in only experimental trial. 1.2 The UNS provides a means of correlating many nation- ally used numbering systems currently administered by soci- eties, trade associations, and individual users and producers of metals and alloys, thereby avoiding confusion caused by use of more than one identification number for the same material; and by the opposite situation of having the same number assigned to two or more entirely different materials. It also provides the uniformity necessary for efficient indexing, record keeping, data storage and retrieval, and cross referencing. 1.3 A UNS number is not in itself a specification, since it establishes no requirements for form, condition, quality, etc. It is a unified identification of metals and alloys for which controlling limits have been established in specifications pub- lished elsewhere. NOTE 3—Organizations that issue specifications should report to appro- priate UNS number-assigning offices (3.1.2) any specification changes that affect descriptions shown in published UNS listings. 2. Description of Numbers (or Codes) Established for Metals and Alloys 2.1 The unified numbering system (UNS) establishes 18 series of numbers for metals and alloys, as shown in Table 1. Each UNS number consists of a single letter-prefix followed by five digits. In most cases the letter is suggestive of the family of metals identified; for example, A for aluminum, P for precious metals, and S for stainless steels. 2.2 Whereas some of the digits in certain UNS number groups have special assigned meaning, each series is indepen- dent of the others in such significance; this practice permits greater flexibility and avoids complicated and lengthy UNS numbers. NOTE 4—This arrangement of alphanumeric six-character numbers is a compromise between the thinking that identification numbers should indicate many characteristics of the material, and the belief that numbers should be short and uncomplicated to be widely accepted and used. 2.3 Wherever feasible, identification “numbers’’ from exist- ing systems are incorporated into the UNS numbers. For example: carbon steel, presently identified by AISI 1020 (American Iron and Steel Institute), is covered by “UNS G 10200 ’’; and free cutting brass, presently identified by CDA (Copper Development Association C 36000), is covered by “UNS C 36000.’’ Table 2 shows the secondary division of some primary series of numbers. 1 This practice is under the jurisdiction of ASTM Committee A01 on Steel, Stainless Steel and Related Alloys and is the direct responsibility of Subcommittee A01.91 on Editorial. Current edition approved Apr. 10, 2003. Published May 2003. Originally approved in 1974. Last previous edition approved in 1997 as E 527–83 (1997)e1. 1 Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States. TABLE 2 Secondary Division of Some Series of Numbers E00001–E99999 Rare Earth and Rare Earth-Like Metals and Alloys E00000–E00999 actinium E01000–E20999 cerium E21000–E45999 mixed rare earthsA E46000–E47999 dysprosium E48000–E49999 erbium E50000–E51999 europium E52000–E55999 gadolinium E56000–E57999 holmium E58000–E67999 lanthanum E68000–E68999 lutetium E69000–E73999 neodymium E74000–E77999 praseodymium E78000–E78999 promethium E79000–E82999 samarium E83000–E84999 scandium E85000–E86999 terbium E87000–E87999 thulium E88000–E89999 ytterbium E90000–E99999 yttrium F00001–F9999 Cast Irons K00001–K99999 Miscellaneous Steels and Ferrous Alloys L00001–L99999 Low-Melting Metals and Alloys L00001–L00999 bismuth L01001–L01999 cadmium L02001–L02999 cesium L03001–L03999 gallium L04001–L04999 indium L05001–L05999 lead L06001–L06999 lithium L07001–L07999 mercury L08001–L08999 potassium L09001–L09999 rubidium L10001–L10999 selenium L11001–L11999 sodium L12001–L12999 thallium L13001–L13999 tin M00001–M99999 Miscellaneous Nonferrous Metals and Alloys M00001–M00999 antimony M01001–M01999 arsenic M02001–M02999 barium M03001–M03999 calcium TABLE 1 Primary Series of Numbers Nonferrous Metals and Alloys A00001–A99999 aluminum and aluminum alloys C00001–C99999 copper and copper alloys E00001–E99999 rare earth and rare earth-like metals and alloys (18 items; see Table 2) L00001–L99999 low melting metals and alloys (15 items; see Table 2) M00001–M99999 miscellaneous nonferrous metals and alloys (12 items; see Table 2) N00001–N99999 nickel and nickel alloys P00001–P99999 precious metals and alloys (8 items; see Table 2) R00001–R99999 reactive and refractory metals and alloys (14 items; see Table 2) Z00001–Z99999 zinc and zinc alloys Ferrous Metals and Alloys D00001–D99999 specified mechanical properties steels F00001–F99999 cast irons and cast steels G00001–G99999 AISI and SAE carbon and alloy steels H00001–H99999 AISI H-steels J00001–J99999 cast steels (except tool steels) K00001–K99999 miscellaneous steels and ferrous alloys S00001–S99999 heat and corrosion resistant (stainless) steels T00001–T99999 tool steels Specialized Metals and Alloys W00001–W99999 welding filler metals, covered and tubular electrodes, classified by weld deposit composition (see Table 2) E 527 – 83 (2003) 2 TABLE 2 Continued M04001–M04999 germanium M05001–M05999 plutonium M06001–M06999 strontium M07001–M07999 tellurium M08001–M08999 uranium M10001–M19999 magnesium M20001–M29999 manganese M30001–M39999 silicon P00001–P99999 Precious Metals and Alloys P00001–P00999 gold P01001–P01999 iridium P02001–P02999 osmium P03001–P03999 palladium P04001–P04999 platinum P05001–P05999 rhodium P06001–P06999 ruthenium P07001–P07999 silver R00001–R99999 Reactive and Refractory Metals and Alloys R01001–R01999 boron R02001–R02999 hafnium R03001–R03999 molybdenum R04001–R04999 niubium (columbium) R05001–R05999 tantalum R06001–R06999 thorium R07001–R07999 tungsten R08001–R08999 vanadium R10001–R19999 beryllium R20001–R29999 chromium R30001–R39999 cobalt R40001–R49999 rhenium R50001–R59999 titanium R60001–R69999 zirconium W00001–W99999 Welding Filler Metals Classified by Weld Deposit Composition W00001–W09999 carbon steel with no significant alloying elements W10000–W19999 manganese-molybdenum low alloy steels W20000–W29999 nickel low alloy steels W30000–W39999 austenitic stainless steels W40000–W49999 ferritic stainless steels W50000–W59999 chromiun low alloy steels W60000–W69999 copper base alloys W70000–W79999 surfacing alloys W80000–W89999 nickel base alloys Z00001–Z99999 Zinc and Zinc Alloys A Alloys in which the rare earths are used in the ratio of their natural occurrence (that is, unseparated rare earths). In this mixture, cerium is the most abundant of the rare earth elements. 2.4 Welding filler metals fall into two general categories: those whose compositions are determined by the filler metal analysis (e.g. solid bare wire or rods and cast rods) and those whose composition is determined by the weld deposit analysis (e.g. covered electrodes, flux-cored and other composite wire electrodes). The latter are assigned to a new primary series with the letter W as shown in Table 1. The solid bare wire and rods continue to be assigned in the established number series according to their composition. NOTE 5—Readers are cautioned not to make their own assignments of numbers from such listings, as this can result in unintended and unex- pected duplication and conflict. 2.5 ASTM and SAE periodically publish up-to-date listings of all UNS numbers assigned to specific metals and alloys, with appropriate reference information on each.2 Many trade associations also publish similar listings related to materials of primary interest to their organizations. 3. Organization for Administering the UNS for Metals and Alloys 3.1 The organization for administering the UNS consists of the following: 3.1.1 Advisory Board—The Advisory Board has approxi- mately 20 volunteer members who are affiliated with major producing and using industries, trade associations, government agencies, and standards societies, and who have extensive experience with identification, classification, and specification of materials. The Board is the administrative arm of SAE and ASTM on all matters pertaining to the UNS. It coordinates thinking on the format of each series of numbers and the administration of each by selected experts. It sets up ground rules for determining eligibility of any material for a UNS number, for requesting such numbers, and for appealing unfavorable rulings. It is the final referee on matters of disagreement between requesters and assigners. 2 Request ASTM DS 56A and SAE Handbook Supplement HS 1086a, Unified Numbering System for Metals and Alloys, (a joint ASTM–SAE publication), PCN 05-056001-01. E 527 – 83 (2003) 3 3.1.2 Several Number-Assigning Offıces— UNS number assigners for certain materials are set up at trade associations which have successfully administered their own numbering systems; for other materials, assigners are located at offices of SAE and ASTM. Each of these assigners has the responsibility for administering a specific series of numbers, as shown in Table 3. Each considers requests for assignment of new UNS numbers, and informs applicants of the action taken. Trade association UNS number assigners report immediately to both SAE and ASTM details of each number assignment. ASTM and SAE assigners collaborate with designated consultants when considering requests for assignment of new numbers. 3.1.3 Corps of Volunteer Consultants— Consultants are selected by the Advisory Board to provide expert knowledge of a specific field of materials. Since they are utilized primarily by the Board and the SAE and ASTM number assigners, they are not listed in this recommended practice. At the request of the ASTM (or SAE) number assigner, a consultant considers a request for a new number in the light of the ground rules established for the material involved, decides whether a new number is justified, and informs the ASTM or the SAE number assigner accordingly. This utilization of experts (consultants and number assigners) is intended to ensure prompt and fair consideration of all requests. It permits each decision to be based on current knowledge of the needs of a specific industry of producers and users. 3.1.4 Staffs at ASTM and SAE—Staff members at SAE and ASTM maintain duplicate master listings of all UNS numbers assigned. 3.1.5 In addition, established SAE and ASTM committees which normally deal with standards and specifications for the materials covered by the UNS, and other knowledgeable persons, are called upon by the Advisory Board for advice TABLE 3 Number Assigners and Areas of Responsibility The Aluminum Association Aluminum and Aluminum Alloys 818 Connecticut Ave. N.W. UNS Number Series: A 00001–A 99999 Washington, D.C. 20006 Attention: Office for Unified Numbering System for Metals Telephone: (202)862-5100 American Iron and Steel Institute Carbon and Alloy Steels 1000 16th St., N.W. UNS Number Series: G 00001–G 99999 Washington, D.C. 20036 H-Steels Attention: Office for Unified Numbering System for Metals UNS Number Series: H 00001–H 99999 Telephone: (202)452-7236 Tool Steels UNS Number Series: T 00001–T 99999 American Welding Society Welding Filler Metals 550 N. W. LeJeune Road UNS Number Series: W 00001–W 99999 P.O. Box 351040 Miami, FL 33135 Attention: Office for Unified Numbering System for Metals Telephone: (305)642-7090 Copper Development Association Copper and Copper Alloys 405 Lexington Ave. UNS Number Series: C 00001–C 99999 New York, N. Y. 10017 Attention: Office for Unified Numbering System for Metals Telephone: (212)953-7321 ASTM Rare Earth and Rare Earth-Like Metals and Alloys 100 Barr Harbor Drive UNS Number Series: E 00001–E 99999 West Conshohocken, Pa. 19428 Low Melting Metals and Alloys Attention: Office for Unified Numbering System for Metals UNS Number Series: L 00001–L 99999 Telephone: (610)832-9652 Miscellaneous Steels and Ferrous Alloys UNS Number Series: K 00001–K 99999 Miscellaneous Nonferrous Metals and Alloys UNS Number Series: M 00001–M 99999 Cast Steels UNS Number Series: J 00001–J 99999 Heat and Corrosion Resistant (Stainless) Steels UNS Number Series: S 00001–S 99999 Zinc and Zinc Alloys UNS Number Series: Z 00001–Z 99999 Precious Metals and Alloys UNS Number Series: P 00001–P 99999 Cast Irons and Cast Steels UNS Number Series: F 00001–F 99999 Society of Automotive Engineers Nickel and Nickel Alloys 400 Commonwealth Drive UNS Number Series: N 00001–N 99999 Warrendale, Pa. 15096 Steels Specified by Mechanical Properties Attention: Office for Unified Numbering System for Metals UNS Number Series: D 00001–D 99999 Telephone: (412)776-4841 Reactive and Refractory Metals and Alloys UNS Number Series: R 00001–R 99999 E 527 – 83 (2003) 4 when considering appeals from unfavorable rulings in the matter of UNS number assignments. 4. Procedure for Requesting Number Assignment to Metals and Alloys Not Already Covered by UNS Numbers (or Codes) 4.1 UNS numbers are assigned only to metals and alloys that have a commercial standing (as defined in Note 2). 4.2 The need for a new number should always be verified by determining from the latest complete listing of already as- signed UNS numbers that a usable number is or is not available. NOTE 6—In assigning UNS numbers, and consequently in searching complete listings of numbers, the predominant element of the metal or alloy usually determines the prefix letter of the series to which it is assigned. In certain instances where no one element predominates, arbitrary decisions are made as to what prefix letter to use, depending on the producing industry and other factors. 4.3 For a new UNS number to be assigned, the composition (or other properties, as applicable) must be significantly different from that of any metal or alloy which has already been assigned a UNS number. 4.3.1 In the case of metals or alloys that are normally identified or specified by chemical composition, the chemical composition limits must be reported. 4.3.2 In the case of metals or alloys that are normally identified or specified by mechanical (or other) properties, such properties and limits thereof must be reported. Only those chemical elements and limits, if any, which are significant in defining such materials need be reported. 4.4 Requests for new numbers shall be submitted on “Ap- plication for UNS Number Assignment’’ forms (see Fig. 1 and Fig. 2). Copies of these are available from any UNS number- assigning office (see Table 3) or facsimiles may be made of the one herein. 4.5 All instructions on the printed application form should be read carefully and all information provided as indicated. NOTE 7—The application form is designed to serve also as a data input sheet to facilitate processing each request through to final print-out of the data on electronic data-processing equipment and to minimize transcrip- tion errors at number-assigning offices and data-processing centers. 4.6 To further assist in assigning UNS numbers, the re- quester is encouraged to suggest a possible UNS number in each request, giving appropriate consideration to any existing number presently used by a trade association, standards soci- ety, producer, or user. 4.7 Each completed application form shall be sent to the UNS number-assigning office having responsibility for the series of numbers that appears to most closely relate to the material described on the form (see Table 3). 5. Keywords 5.1 aluminum alloy numbering system; aluminum alloy UNS numbering; cast iron numbering system; cast iron UNS numbering; copper alloy numbering system; copper alloy UNS numbering; ferrous alloys numbering system; ferrous alloys UNS numbering; nickel alloy numbering system; nickel alloy UNS numbering; reactive metals and alloys numbering system; reactive metals and alloys UNS numbering; refractory metals and alloys numbering system; refractory metals and alloys UNS numbering; steel alloy numbering system; steel alloy UNS numbering; stainless steel alloy numbering system; stainless steel alloy UNS numbering; unified numbering sys- tem; UNS metal and alloy numbering system; weld filler metal numbering system; weld filler metal numbering; welding electrode numbering system; welding electrode UNS numbering E 527 – 83 (2003) 5 NOTE—Reverse side of Fig. 1 is located on the next page. FIG. 1 Sample Application Form. 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