ASTM B834-1995(2009) Standard Specification for Pressure Consolidated Powder Metallurgy Iron-Nickel-Chromium-Molybdenum (UNS N08367) and Nickel-Chromium-Molybdenum-Columbium (Nb) (.pdf
《ASTM B834-1995(2009) Standard Specification for Pressure Consolidated Powder Metallurgy Iron-Nickel-Chromium-Molybdenum (UNS N08367) and Nickel-Chromium-Molybdenum-Columbium (Nb) (.pdf》由会员分享,可在线阅读,更多相关《ASTM B834-1995(2009) Standard Specification for Pressure Consolidated Powder Metallurgy Iron-Nickel-Chromium-Molybdenum (UNS N08367) and Nickel-Chromium-Molybdenum-Columbium (Nb) (.pdf(4页珍藏版)》请在麦多课文档分享上搜索。
1、Designation: B 834 95 (Reapproved 2009)Standard Specification forPressure Consolidated Powder Metallurgy Iron-Nickel-Chromium-Molybdenum (UNS N08367) and Nickel-Chromium-Molybdenum-Columbium (Nb) (UNS N06625)Alloy Pipe Flanges, Fittings, Valves, and Parts1This standard is issued under the fixed desi
2、gnation B 834; the number immediately following the designation indicates the year oforiginal adoption or, in the case of revision, the year of last revision. A number in parentheses indicates the year of last reapproval. Asuperscript epsilon () indicates an editorial change since the last revision
3、or reapproval.1. Scope1.1 This specification covers pressure consolidated powdermetallurgy iron-nickel-chromium-molybdenum (UNSN08367) and nickel-chromium-molybdenumcolumbium (Nb)(UNS N06625) pipe flanges, fittings, valves, and parts intendedfor general corrosion or heat-resisting service.1.2 The va
4、lues stated in inch-pound units are to be regardedas standard. The values given in parentheses are mathematicalconversions to SI units that are provided for information onlyand are not considered standard.1.3 The following safety hazards caveat pertains only to testmethods portions, Sections 7.3 and
5、 13, of this specification:This standard does not purport to address all of the safetyconcerns, if any, associated with its use. It is the responsibilityof the user of this standard to become familiar with all hazardsincluding those identified in the appropriate Material SafetyData Sheet (MSDS) for
6、this product/material as provided bythe manufacturer, to establish appropriate safety and healthpractices, and to determine the applicability of regulatorylimitations prior to use.2. Referenced Documents2.1 ASTM Standards:2E8 Test Methods for Tension Testing of Metallic MaterialsE 1473 Test Methods
7、for Chemical Analysis of Nickel,Cobalt, and High-Temperature AlloysG28 Test Methods for Detecting Susceptibility to Inter-granular Corrosion in Wrought, Nickel-Rich, Chromium-Bearing AlloysG48 Test Methods for Pitting and Crevice Corrosion Re-sistance of Stainless Steels and Related Alloys by Use of
8、Ferric Chloride Solution2.2 Manufacturers Standardization Society of the Valveand Fittings Industry Standard:3SP-25 Standard Marking System for Valves, Fittings,Flanges, and Unions2.3 ASME/ANSI Standard:4ASME/ANSI B16.5 Pipe Flanges and Flanged Fittings3. Terminology3.1 Definitions of Terms Specific
9、 to This Standard:3.1.1 can, nthe container used to encapsulate the powderduring the pressure consolidation process; it is removed fromthe final part.3.1.2 compact, nthe consolidated powder from one can; itmay be used to make one or more parts.3.1.3 fill pin, nthe part of the compact in the spout us
10、ed tofill the can; it is not usually integral to the part produced.3.1.4 part, na single item coming from a compact, eitherprior to or after machining.3.1.5 powder blend, na homogeneous mixture of powderfrom one or more heats; it is limited to the amount that can bemixed in the same blender at one t
11、ime.3.1.6 rough part, nthe part prior to final machining.4. Ordering Information4.1 Orders for material under this specification shouldinclude the following information:4.1.1 Quantity (weight or number of pieces),4.1.2 Name of material or UNS number,4.1.3 Microstructure examination, if required (5.1
12、.4),4.1.4 ASTM designation and year of issue,4.1.5 Inspection (14.1),4.1.6 Whether rough part or finish machined (7.2.2),4.1.7 Supplementary requirements, when applicable, and4.1.8 If possible, the intended end use.1This specification is under the jurisdiction of ASTM Committee B02 onNonferrous Meta
13、ls and Alloys and is the direct responsibility of SubcommitteeB02.07 on Refined Nickel and Cobalt and Their Alloys.Current edition approved Oct. 1, 2009. Published October 2009. Originallyapproved in 1993. Last previous edition approved in 2003 as B 834 95 (2003).2For referenced ASTM standards, visi
14、t 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 the Valve and FittingsIndustry (MSS), 12
15、7 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.1Copyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA
16、 19428-2959, United States.5. Materials and Manufacture5.1 Manufacturing 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.
17、The entire assembly shall beheated and placed under sufficient pressure for a sufficientperiod of time to ensure that the final consolidated part is fullydense. The compact may represent one part or a number ofparts may be machined from it.5.1.2 The powder shall be produced by vacuum meltingfollowed
18、 by gas atomization.5.1.3 When powder from more than one heat is used tomake a blend, the heats shall be thoroughly mixed to ensurehomogeneity.5.1.4 When specified on the order, a section of the compactmay be sectioned and the microstructure examined to showporosity and other internal imperfections.
19、 This is usuallyperformed on the fill pin. In such cases, the section location andthe question of acceptable and unacceptable microstructureshall be agreed upon by the manufacturer and the purchaser.5.2 Heat Treatment:5.2.1 Alloy N06625 shall be supplied in the solution an-nealed condition. At the o
20、ption of the producer, the anneal maybe a separate operation following consolidation or may be partof the consolidation process. In either case, the temperatureshall be 1800F minimum.5.2.2 Alloy N08367 shall be supplied in the solution an-nealed condition.5.2.2.1 The heat treatment shall consist of
21、heating to aminimum temperature of 2025F and quenching in water orrapidly cooling by other means.6. Chemical Composition6.1 The material shall conform to the requirements forchemical composition prescribed in Table 1.6.2 If a product (check) analysis is performed by thepurchaser, the material shall
22、conform to the product (check)analysis variations prescribed in Table 2.7. Mechanical and Other Requirements7.1 Mechanical PropertiesThe material shall conform tothe requirements for mechanical properties prescribed in Table3 at room temperature.7.2 Hydrostatic TestsAfter machining, valve bodies, fi
23、t-tings, and other pressure-containing parts shall be tested to thehydrostatic shell-test pressures prescribed in ASME/ANSIB16.5 for the applicable steel rating for which the compact isdesigned, and shall show no leaks. Parts ordered under thesespecifications for working pressures other than those l
24、isted inthe American National Standard ratings shall be tested to suchpressures as may be agreed upon between the manufacturer andpurchaser.7.2.1 No hydrostatic test is required for welding neck orother flanges.7.2.2 The compact manufacturer is not required to performpressure tests on rough parts th
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