ASTM A989 A989M-2007 Standard Specification for Hot Isostatically-Pressed Alloy Steel Flanges Fittings Valves and Parts for High Temperature Service《高温设备用热等静压压制的合金钢法兰、配件、阀门和部件的标准规范.pdf
《ASTM A989 A989M-2007 Standard Specification for Hot Isostatically-Pressed Alloy Steel Flanges Fittings Valves and Parts for High Temperature Service《高温设备用热等静压压制的合金钢法兰、配件、阀门和部件的标准规范.pdf》由会员分享,可在线阅读,更多相关《ASTM A989 A989M-2007 Standard Specification for Hot Isostatically-Pressed Alloy Steel Flanges Fittings Valves and Parts for High Temperature Service《高温设备用热等静压压制的合金钢法兰、配件、阀门和部件的标准规范.pdf(8页珍藏版)》请在麦多课文档分享上搜索。
1、Designation: A 989/A 989M 07Standard Specification forHot Isostatically-Pressed Alloy Steel Flanges, Fittings,Valves, and Parts for High Temperature Service1This standard is issued under the fixed designationA 989/A 989M; the number immediately following the designation indicates the yearof original
2、 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.1. Scope*1.1 This specification covers hot isostatically-pressed, pow-der meta
3、llurgy, alloy steel piping components for use inpressure systems. Included are flanges, fittings, valves, andsimilar parts made to specified dimensions or to dimensionalstandards, such as in ASME Specification B16.5.1.2 Several grades of alloy steels are included in thisspecification.1.3 Supplementa
4、ry requirements are provided for use whenadditional testing or inspection is desired. These shall applyonly when specified individually by the purchaser in the order.1.4 This specification is expressed in both inch-pound unitsand in SI units. Unless the order specifies the applicable “M”specificatio
5、n designation (SI units), however, the material shallbe furnished to inch-pound units.1.5 The values stated in either inch-pound units or SI unitsare to be regarded separately as the standard. Within the text,the SI units are shown in parentheses. The values stated in eachsystem are not exact equiva
6、lents; therefore, each system mustbe used independently of the other. Combining values from thetwo systems may result in nonconformance with the specifi-cation.1.6 The following safety hazards caveat pertains only to testmethods portions, 8.1, 8.2, and 9.5-9.7 of this specification:This standard doe
7、s not purport to address all of the safetyconcerns, if any, associated with its use. It is the responsibilityof the user of this standard to establish appropriate safety andhealth practices and to determine the applicability of regula-tory limitations prior to use.2. Referenced Documents2.1 ASTM Sta
8、ndards:2A 275/A 275M Practice for Magnetic Particle Examinationof Steel ForgingsA 370 Test Methods and Definitions for Mechanical Testingof Steel ProductsA 751 Test Methods, Practices, and Terminology forChemical Analysis of Steel ProductsB311 Test Method for Density Determination for PowderMetallur
9、gy (P/M) Materials Containing Less Than TwoPercent PorosityE 165 Test Method for Liquid Penetrant ExaminationE 340 Test Method for Macroetching Metals and AlloysE 606 Practice for Strain-Controlled Fatigue Testing2.2 MSS Standard:SP 25 Standard Marking System for Valves, Fittings,Flanges, and Unions
10、32.3 ASME Specifications and Boiler and Pressure VesselCodes:B16.5 Dimensional Standards for Steel Pipe Flanges andFlanged Fittings42.4 ASME Section IX Welding Qualifications:SFA-5.5 Specification for Low-Alloy Steel Covered Arc-Welding Electrodes43. Terminology3.1 Definitions of Terms Specific to T
11、his Standard:3.1.1 can, nthe container used to encapsulate the powderduring the pressure consolidation process that is removedpartially or fully from the final part.3.1.2 compact, nthe consolidated powder from one canthat may be used to make one or more parts.3.1.3 consolidation, nthe bonding of adj
12、acent powderparticles in a compact under pressure by heating to a tempera-ture below the melting point of the powder.3.1.4 fill stem, nthe part of the compact used to fill the canthat is not usually integral to the part produced.3.1.5 hot isostatic-pressing, na process for simulta-neously heating an
13、d forming a compact in which the powder iscontained in a sealed formable enclosure, usually made frommetal, and the so-contained powder is subjected to equal1This specification is under the jurisdiction of ASTM Committee A01 on Steel,Stainless Steel and Related Alloys and is the direct responsibilit
14、y of SubcommitteeA01.22 on Steel Forgings and Wrought Fittings for Piping Applications and BoltingMaterials for Piping and Special Purpose Applications.Current edition approved Sept. 1, 2007. Published October 2007. Originallyapproved in 1998. Last previous edition approved in 2005 as A 989/A 989M 0
15、5.2For referenced ASTM standards, 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 Manufacturers Standardization Society of th
16、e Valve and FittingsIndustry (MSS), 127 Park St., NE, Vienna, VA 22180-4602, http:/www.mss-.4Available from American Society of Mechanical Engineers (ASME), ASMEInternational Headquarters, Three Park Ave., New York, NY 10016-5990, http:/www.asme.org.1*A Summary of Changes section appears at the end
17、of this standard.Copyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.pressure from all directions at a temperature high enough topermit plastic deformation and consolidation of the powderparticles to take place.3.1.6 lot, na number of par
18、ts produced from a singlepowder blend following the same manufacturing conditions.3.1.7 part, na single item coming from a compact, eitherprior to or after machining.3.1.8 powder blend, na homogeneous mixture of powderfrom one or more heats of the same grade.3.1.9 rough part, nthe part prior to fina
19、l machining.4. Ordering Information4.1 It is the responsibility of the purchaser to specify in thepurchase order all requirements that are necessary for materialordered under this specification. Such requirements may in-clude, but are not limited to, the following:4.1.1 Quantity (weight or number of
20、 parts).4.1.2 Name of material or UNS number.4.1.3 ASTM designation and year of issue.4.1.4 Dimensions (tolerances and surface finishes).4.1.5 Microstructure examination, if required (5.1.4).4.1.6 Inspection (14.1).4.1.7 Whether rough part or finished machined part (8.2.2).4.1.8 Supplementary requir
21、ements, if any.4.1.9 Additional requirements (see 7.2.1 and 16.1).4.1.10 Requirement, if any, that the manufacturer shallsubmit drawings for approval showing the shape of the roughpart before machining and the exact location of test specimenmaterial (see 9.3.1).5. Materials and Manufacture5.1 Manufa
22、cturing Practice:5.1.1 Compacts shall be manufactured by placing a singlepowder blend into a can, evacuating the can, and sealing it. Thecan material shall be selected to ensure that it has no deleteri-ous effect on the final product. The entire assembly shall beheated and placed under sufficient pr
23、essure for a sufficientperiod of time to ensure that the final consolidated part meetsthe density requirements of 8.1.2.1. One or more parts shall bemachined from a single compact.5.1.2 The powder shall be prealloyed and made by a meltingmethod capable of producing the specified chemical composi-tio
24、n, such as but not limited to air or vacuum induction melting,followed by gas atomization.5.1.3 When powder from more than one heat is used tomake a blend, the heats shall be mixed thoroughly to ensurehomogeneity.5.1.4 The compact shall be sectioned and the microstructureexamined to check for porosi
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