ASTM A959-2011 Standard Guide for Specifying Harmonized Standard Grade Compositions for Wrought Stainless Steels《锻制不锈钢用说明协调标准等级构成的标准指南》.pdf
《ASTM A959-2011 Standard Guide for Specifying Harmonized Standard Grade Compositions for Wrought Stainless Steels《锻制不锈钢用说明协调标准等级构成的标准指南》.pdf》由会员分享,可在线阅读,更多相关《ASTM A959-2011 Standard Guide for Specifying Harmonized Standard Grade Compositions for Wrought Stainless Steels《锻制不锈钢用说明协调标准等级构成的标准指南》.pdf(8页珍藏版)》请在麦多课文档分享上搜索。
1、Designation: A959 11Standard Guide forSpecifying Harmonized Standard Grade Compositions forWrought Stainless Steels1This standard is issued under the fixed designation A959; the number immediately following the designation indicates the year oforiginal adoption or, in the case of revision, the year
2、of last revision. A number in parentheses indicates the year of last reapproval. Asuperscript epsilon () indicates an editorial change since the last revision or reapproval.1. Scope*1.1 This guide provides a guide to ASTM SubcommitteesA01.06, A01.10, A01.17, A01.22, and A01.28 for specifyingchemical
3、 composition limits of wrought stainless steels. It isintended that these recommended grade composition limits besuitable for adoption by other standardization bodies thatprepare standards for stainless steel products.1.2 Included in this guide are the recommendations fordetermining the number of si
4、gnificant figures for specifyingchemical composition from Test Methods, Practices, and Ter-minology A751.1.3 All stainless steel UNS numbers and the stainless steelgrades in all standards overseen by the aforementioned ASTMsubcommittees have been included, except those grades appli-cable to restrict
5、ed special end uses and alloys containing lessthan 10.5 % minimum chromium.1.4 Not addressed are minor composition modificationswhich a specific product subcommittee may find necessary toaccommodate effects of normal processing or to enhancefabricability by the producer or user, or both.1.5 Also not
6、 generally addressed (except when establishedbyASTM product subcommittees) is a complete rationalizationof all limits, especially when such would conflict with long-standing practices and is not justified by special technicaleffect.1.6 Excluded from this guide are cast material and weldingfiller met
7、al.2. Referenced Documents2.1 ASTM Standards:2A751 Test Methods, Practices, and Terminology for Chemi-cal Analysis of Steel ProductsE527 Practice for Numbering Metals and Alloys in theUnified Numbering System (UNS)2.2 SAE Standards:3J 1086 Recommended Practice for Numbering Metals andAlloysHS-1086 M
8、etals and Alloys in the Unified NumberingSystem3. Terminology3.1 Definitions of Terms Specific to This Standard:3.1.1 austenitic grade, nmetallurgical term meaning thatthe material is usually predominantly face-centered cubic instructure and hardenable only by cold working.3.1.2 austenitic-ferritic
9、(duplex) grade, nmetallurgicalterm meaning that the material is a mixture of austenitic andferritic structures, with at least one-fourth of the lesser phase,and hardenable only by cold working.3.1.3 ferritic grade, nmetallurgical term meaning that thematerial is body-centered cubic in structure (wit
10、h little, if any,tempered martensite) and hardenable only slightly by coldworking (responding little or only slightly to conventional heattreatment by quenching and tempering).3.1.4 martensitic grade, nmetallurgical term meaning thatthe material is capable of being produced in a distortedbody-center
11、ed cubic structure by conventional heat treatingand quenching, and that the quenched structure is capable ofconventional tempering. Martensitic grades are delivered in theannealed (ferritic) condition or the hardened and tempered(martensitic) condition.3.1.5 precipitation hardening grade, nmetallurg
12、ical termmeaning that the material may be basically austenitic ormartensitic in structure and hardenable by precipitation hard-ening (sometimes called age hardening).3.1.6 standard stainless steel grade, nlisted chemicalcomposition associated with a stainless steel grade identifiedby a particular UN
13、S number appearing in SAE publicationHS-1086, except as modified by an ASTM subcommitteehaving oversight of a wrought stainless steel product wheresuch a modification is justified by a specific technical effect.1This guide is under the jurisdiction of ASTM Committee A01 on Steel,Stainless Steel and
14、Related Alloys and is the direct responsibility of SubcommitteeA01.17 on Flat-Rolled and Wrought Stainless Steel.Current edition approved June 1, 2011. Published June 2011. Originallyapproved in 1996. Last previous edition approved in 2009 as A959 09. DOI:10.1520/A0959-11.2For referenced ASTM standa
15、rds, visit the ASTM website, www.astm.org, orcontact ASTM Customer Service at serviceastm.org. For Annual Book of ASTMStandards volume information, refer to the standards Document Summary page onthe ASTM website.3Available from Society of Automotive Engineers (SAE), 400 CommonwealthDr., Warrendale,
16、PA 15096-0001, http:/www.sae.org.1*A Summary of Changes section appears at the end of this standard.Copyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.4. Significance and Use4.1 It is anticipated that the ASTM Subcommittees A01.06,A01.10
17、, A01.17, A01.22, and A01.28 will use the standardcomposition limits listed in this guide for the grades identifiedby the corresponding UNS designation in the product specifi-cation unless there is a specific technical justification for doingotherwise. The compositions in this guide shall not be con
18、sid-ered as chemical requirements for any particular product untiladopted by the subcommittee overseeing that product.4.2 Assuming that uniform compositions among the manyproduct standards for stainless steel are desirable, the compo-sition limits provided in this standard are to be used as guidesin
19、 determining limits for each of the elements included in thetotal composition of each grade. The composition limits havebeen established with the intent that each product subcommit-tee will find it necessary to require only a minimum number ofchanges to reflect specific technical effects. Section 5
20、lists thegeneral guidelines followed for determining the limits for eachelement; the limits established in this guide are based on theseguidelines.4.3 Not included in this standard stainless steel gradeharmonization effort is an attempt to unify stainless steelcompositions in ASTM product standards
21、by any means otherthan recognizing current industry practices.5. General Guidelines Used for Determining CompositionLimits5.1 CarbonIt is recommended that limits be to only twodecimal places for levels of 0.04 % and higher because it is notnecessary to control to such precision at levels above 0.04
22、%.(It should be recognized that limits such as 0.045 % maximummay also be simply stated as 0.04 % maximum.) It is alsorecommended that three decimal places be used at levels of0.030 % and lower, unless, for example, it is clearly recognizedthat 0.03 % maximum means that 0.035 % is satisfactory.5.2 M
23、anganeseExcept for the Cr-Ni-Mn grades(S2XXXX), it is recommended that limits of 2 % maximumand 1 % maximum be used for the austenitic and other gradesrespectively, except for the free machining grades with highsulfur or selenium, or when necessary to promote nitrogensolubility.5.3 PhosphorusIt is r
24、ecommended that 0.045 % maxi-mum be applied to austenitic grades, and 0.040 % maximum toother grades unless the sponsoring producer recommends alower limit for specific technical effect. Exceptionsome ofthe Cr-Ni-Mn austenitic grades have always been produced to0.060 % maximum.5.4 SulfurIt is recomm
- 1.请仔细阅读文档,确保文档完整性,对于不预览、不比对内容而直接下载带来的问题本站不予受理。
- 2.下载的文档,不会出现我们的网址水印。
- 3、该文档所得收入(下载+内容+预览)归上传者、原创作者;如果您是本文档原作者,请点此认领!既往收益都归您。
下载文档到电脑,查找使用更方便
10000 积分 0人已下载
下载 | 加入VIP,交流精品资源 |
- 配套讲稿:
如PPT文件的首页显示word图标,表示该PPT已包含配套word讲稿。双击word图标可打开word文档。
- 特殊限制:
部分文档作品中含有的国旗、国徽等图片,仅作为作品整体效果示例展示,禁止商用。设计者仅对作品中独创性部分享有著作权。
- 关 键 词:
- ASTMA9592011STANDARDGUIDEFORSPECIFYINGHARMONIZEDSTANDARDGRADECOMPOSITIONSFORWROUGHTSTAINLESSSTEELS 锻制

链接地址:http://www.mydoc123.com/p-460121.html