1、Designation: E527 16Standard Practice forNumbering Metals and Alloys in the Unified NumberingSystem (UNS)1This standard is issued under the fixed designation E527; the number immediately following the designation indicates the year oforiginal adoption or, in the case of revision, the year of last re
2、vision. A number in parentheses indicates the year of last reapproval. Asuperscript epsilon () indicates an editorial change since the last revision or reapproval.This standard has been approved for use by agencies of the U.S. Department of Defense.1. Scope*1.1 This practice (Note 1) covers a unifie
3、d numberingsystem (UNS) for metals and alloys that have a “commercialstanding” (see Note 2), and covers the procedure by whichsuch numbers are assigned. Section 2 describes the system ofalphanumeric designations or “numbers” established for eachfamily of metals and alloys. Section 3 outlines the org
4、anizationestablished for administering the system. Section 5 describesthe procedure for requesting number assignment to metals andalloys for which UNS numbers have not previously beenassigned.NOTE 1UNS designations are not to be used for metals and alloys thatare not registered under the system desc
5、ribed herein, or for any metal oralloy whose composition differs from those registered.NOTE 2The terms “commercial standing,” “production usage,” andother similar terms are intended to apply to metals and alloys in activecommercial production and use, although the actual amount of such usewill depen
6、d, among other things, upon the type of metals and alloysinvolved and their application.The various standardizing organizations involved with the individualindustries apply their own established criteria to define the status of ametal or alloy in terms of when a UNS designation number will beassigne
7、d. For instance, ASTM Committee A01 requires details of heatanalysis, mechanical properties, and processing requirements for additionof a new grade or alloy to its specifications. The Copper DevelopmentAssociation requires that the material be “in commercial use (withouttonnage limits);” the Aluminu
8、m Association requires that the alloy be“offered for sale (not necessarily in commercial use);” the SAE AerospaceMaterials Division calls for “repetitive procurement by at least two users.”Thus, while no universal definition for usage criteria is established, theUNS numbers are intended to identify
9、metals and alloys that are generallyin regular production and use.AUNS number will not ordinarily be issuedfor a material that has just been conceived or that is still in onlyexperimental trial.2. Description of Numbers (or Codes) Established forMetals and Alloys2.1 The UNS establishes 19 series of
10、numbers for metalsand alloys, as shown in Table 1. Each UNS number consists ofa single letter-prefix followed by five digits. In most cases theletter is suggestive of the family of metals identified; forexample, A for aluminum, P for precious metals, and S forstainless steels.2.2 Whereas some of the
11、 digits in certain UNS numbergroups have special assigned meaning, each series is indepen-dent of the others in such significance; this practice permitsgreater flexibility and avoids complicated and lengthy UNSnumbers.NOTE 3This arrangement of alphanumeric six-character numbers is acompromise betwee
12、n the thinking that identification numbers shouldindicate many characteristics of the material, and the belief that numbersshould be short and uncomplicated to define only the chemical composi-tion and leaving the other properties to the specifications involved.2.3 Wherever feasible, identification
13、“numbers” from pre-vious systems are incorporated into the UNS numbers. Forexample: carbon steel, originally identified by “American Ironand Steel Institute (AISI) 1020,” is covered by “UNS G10200,”and free cutting brass, presently identified by “Copper Devel-opment Association (CDA) C36000,” is cov
14、ered by“UNS C36000.” Table 2 shows the secondary division of someprimary series of numbers.1This practice is under the jurisdiction of ASTM Committee A01 on Steel,Stainless Steel and Related Alloys and is the direct responsibility of SubcommitteeA01.91 on Editorial.Current edition approved Sept. 1,
15、2016. Published September 2016. Originallyapproved in 1974. Last previous edition approved in 2012 as E527 12. DOI:10.1520/E0527-16.*A Summary of Changes section appears at the end of this standardCopyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. Uni
16、ted States1TABLE 2 Secondary Division of Some Series of NumbersE00001E99999 Rare Earth and Rare Earth-Like Metals and AlloysE00000E00999 actiniumE01000E20999 ceriumE21000E45999 mixed rare earthsAE46000E47999 dysprosiumE48000E49999 erbiumE50000E51999 europiumE52000E55999 gadoliniumE56000E57999 holmiu
17、mE58000E67999 lanthanumE68000E68999 lutetiumE69000E73999 neodymiumE74000E77999 praseodymiumE78000E78999 promethiumE79000E82999 samariumE83000E84999 scandiumE85000E86999 terbiumE87000E87999 thuliumE88000E89999 ytterbiumE90000E99999 yttriumL00001L99999 Low-Melting Metals and AlloysL00001L00999 bismuth
18、L01001L01999 cadmiumL02001L02999 cesiumL03001L03999 galliumL04001L04999 indiumL06001L06999 lithiumL07001L07999 mercuryL08001L08999 potassiumL09001L09999 rubidiumL10001L10999 seleniumL11001L11999 sodiumL12001L12999 thalliumL13001L13999 tinL50001L59999 leadM00001M99999 Miscellaneous Nonferrous Metals
19、and AlloysM00001M00999 antimonyM01001M01999 arsenicM02001M02999 bariumM03001M03999 calciumM04001M04999 germaniumM05001M05999 plutoniumM06001M06999 strontiumM07001M07999 telluriumTABLE 1 Primary Series of NumbersNonferrous Metals and AlloysA00001A99999 aluminum and aluminum alloysB00001B99999 aluminu
20、m and aluminum alloysC00001C99999 copper and copper alloysE00001E99999 rare earth and rare earth-like metals and alloys (18items; see Table 2)L00001L99999 low melting metals and alloys (15 items; see Table 2)M00001M99999 miscellaneous nonferrous metals and alloys (12 items;see Table 2)N00001N99999 n
21、ickel and nickel alloysP00001P99999 precious metals and alloys (8 items; see Table 2)R00001R99999 reactive and refractory metals and alloys (14 items; seeTable 2)Z00001Z99999 zinc and zinc alloysFerrous Metals and AlloysD00001D99999 specified mechanical properties steelsF00001F99999 cast ironsG00001
22、G99999 carbon and alloy steelsH00001H99999 H-steelsJ00001J99999 cast steels (except tool steels)K00001K99999 miscellaneous steels and ferrous alloysS00001S99999 heat and corrosion resistant (stainless) steelsT00001T99999 tool steelsW00001W99999 welding filler metals, covered and tubular electrodes,c
23、lassified by weld deposit composition (see Table 2)E527 162TABLE 2 ContinuedM08001M08999 uraniumM10001M19999 magnesiumM20001M29999 manganeseM30001M39999 siliconP00001P99999 Precious Metals and AlloysP00001P00999 goldP01001P01999 iridiumP02001P02999 osmiumP03001P03999 palladiumP04001P04999 platinumP0
24、5001P05999 rhodiumP06001P06999 rutheniumP07001P07999 silverR00001R99999 Reactive and Refractory Metals and AlloysR01001R01999 boronR02001R02999 hafniumR03001R03999 molybdenumR04001R04999 niobium (columbium)R05001R05999 tantalumR06001R06999 thoriumR07001R07999 tungstenR08001R08999 vanadiumR10001R1999
25、9 berylliumR20001R29999 chromiumR30001R39999 cobaltR40001R49999 rheniumR50001R59999 titaniumR60001R69999 zirconiumW00001W99999 Welding Filler Metals Classified by Weld Deposit CompositionW00001W09999 carbon steel with no significant alloying elementsW10000W19999 manganese-molybdenum low alloy steels
26、W20000W29999 nickel low alloy steelsW30000W39999 austenitic stainless steelsW40000W49999 ferritic stainless steelsW50000W59999 chromiun low alloy steelsW60000W69999 copper base alloysW70000W79999 surfacing alloysW80000W89999 nickel base alloysAAlloys in which the rare earths are used in the ratio of
27、 their natural occurrence (that is, unseparated rare earths). In this mixture, cerium is the most abundant of the rareearth elements.2.4 Welding filler metals fall into two general categories:those whose compositions are determined by the filler metalanalysis (e.g. solid bare wire or rods and cast r
28、ods) and thosewhose composition is determined by the weld deposit analysis(e.g. covered electrodes, flux-cored and other composite wireelectrodes). The latter are assigned to a primary series with theletter W as shown in Table 1. The solid bare wire and rodscontinue to be assigned in the established
29、 number seriesaccording to their composition.NOTE 4The assignment of UNS designations rests solely with theindustry organizations listed herin. Readers are not to make their ownassignments of numbers from such listings, as this may create a risk ofduplication and conflict.2.5 ASTM and SAE periodical
30、ly publish up-to-date listingsof all UNS numbers assigned to specific metals and alloys,with appropriate reference information on each.2Many tradeassociations also publish similar listings related to materials ofprimary interest to their organizations.3. Organization for Administering the UNS for Me
31、talsand Alloys3.1 The organization for administering the UNS consists ofthe following:3.1.1 Advisory BoardThe Advisory Board has approxi-mately 20 volunteer members who are affiliated with majorproducing and using industries, trade associations, governmentagencies, and standards societies, and who h
32、ave extensiveexperience with identification, classification, and specificationof materials. The Board is the administrative arm of SAE andASTM on all matters pertaining to the UNS. It coordinatesthinking on the format of each series of numbers and theadministration of each by selected experts. It se
33、ts up groundrules for determining eligibility of any material for a UNSnumber, for requesting such numbers, and for appealingunfavorable rulings. It is the final referee on matters ofdisagreement between requesters and assigners.3.1.2 Several Number-Assigning OffcesUNS number as-signers for certain
34、materials are set up at trade associationswhich have successfully administered their own numberingsystems; for other materials, assigners are located at offices ofSAE. Each of these assigners has the responsibility for admin-istering a specific series of numbers, as shown in Table 3. Each2Request th
35、e most recent version of ASTM DS 56 and SAE HS 1086, UnifiedNumbering System for Metals and Alloys, (a joint ASTMSAE publication), PCN05-056001-01.E527 163considers requests for assignment of new UNS numbers, andinforms applicants of the action taken. Trade association UNSnumber assigners report imm
36、ediately to SAE details of eachnumber assignment. Assigners collaborate with designatedconsultants when considering requests for assignment of newnumbers.3.1.3 Corps of Volunteer ConsultantsConsultants are se-lected by the Advisory Board to provide expert knowledge ofa specific field of materials. S
37、ince they are utilized primarily bythe Board and the SAE number assigners, they are not listed inthis recommended practice. At the request of the SAE numberassigner, a consultant considers a request for a new number inthe light of the ground rules established for the materialinvolved, decides whethe
38、r a new number is justified, andinforms the SAE number assigner accordingly. This utilizationof experts (consultants and number assigners) is intended toensure prompt and fair consideration of all requests. It permitseach decision to be based on current knowledge of the needs ofa specific industry o
39、f producers and users.3.1.4 Staff at SAEStaff members at SAE maintain masterlistings of all UNS numbers assigned.3.1.5 In addition, established SAE and ASTM committeeswhich normally deal with standards and specifications for thematerials covered by the UNS, and other knowledgeablepersons, are called
40、 upon by the Advisory Board for advicewhen considering appeals of unfavorable rulings in the matterof UNS number assignments.4. Significance and Use4.1 The UNS provides a means of correlating many nation-ally used numbering systems currently administered bysocieties, trade associations, and individu
41、al users and produc-ers of metals and alloys, thereby avoiding confusion caused byuse of more than one identification number for the sameTABLE 3 Number Assigners and Areas of ResponsibilityThe Aluminum Association, Inc. Aluminum and Aluminum Alloys1425 Wilson Boulevard, Suite 600Arlington, VA 22209A
42、ttention: Office for Unified Numbering System for MetalsTelephone: (703) 358-2960www.aluminum.orgUNS Number Series: A00001A99999 andB00001B99999American Welding Society Welding Filler Metals550 N. W. LeJeune Road UNS Number Series: W00001W99999P.O. Box 351040Miami, FL 33126Attention: Office for Unif
43、ied Numbering System for MetalsTelephone: (305) 443-9353www.aws.orgCopper Development Association Copper and Copper Alloys260 Madison Avenue, 16th Floor UNS Number Series: C00001C99999New York, NY 10016Attention: Office for Unified Numbering System for MetalsTelephone: (212) 251-7200www.copper.orgSo
44、ciety of Automotive Engineers Carbon and Alloy Steels400 Commonwealth Drive UNS Number Series: G00001G99999Warrendale, PA 15096 H-SteelsAttention: Office for Unified Numbering System for Metals UNS Number Series: H00001H99999Telephone: (724) 776-4841 Tool Steelswww.sae.org UNS Number Series: T00001T
45、99999Miscellaneous Nonferrous Metals and AlloysUNS Number Series: M00001M99999Cast SteelsUNS Number Series: J00001J99999Heat and Corrosion Resistant (Stainless) SteelsUNS Number Series: S00001S99999Zinc and Zinc AlloysUNS Number Series: Z00001Z99999Precious Metals and AlloysUNS Number Series: P00001
46、P99999Cast IronsUNS Number Series: F00001F99999Nickel and Nickel AlloysUNS Number Series: N00001N99999Steels Specified by Mechanical PropertiesUNS Number Series: D00001D99999Reactive and Refractory Metals and AlloysUNS Number Series: R00001R99999E527 164material; and by the opposite situation of hav
47、ing the samenumber assigned to two or more entirely different materials. Italso provides the uniformity necessary for efficient indexing,record keeping, data storage and retrieval, and cross referenc-ing.4.2 A UNS number is not in itself a specification, since itestablishes no requirements for form,
48、 condition, quality, etc. Itis a unified identification of metals and alloys for whichcontrolling limits have been established in specifications pub-lished elsewhere.NOTE 5Organizations that issue specifications should report toappropriate UNS number-assigning offices (3.1.2) any specificationchange
49、s that affect descriptions shown in published UNS listings.5. Procedure for Requesting Number Assignment toMetals and Alloys Not Already Covered by UNSNumbers (or Codes)5.1 UNS numbers are assigned only to metals and alloysthat have a commercial standing (as defined in Note 2).5.2 The need for a new number should always be verified bydetermining from the latest complete listing of already as-signed UNS numbers that a usable number is or is notavailable.NO
