1、Designation: A703/A703M 17aA703/A703M 18Standard Specification forSteel Castings, General Requirements, for Pressure-Containing Parts1This standard is issued under the fixed designation A703/A703M; the number immediately following the designation indicates the yearof original adoption or, in the cas
2、e of revision, the year of last revision. A number in parentheses indicates the year of last reapproval.A superscript 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
3、 specification2 covers a group of common requirements that, unless otherwise specified in an individual specification,shall apply to steel castings for pressure-containing parts under each of the following ASTM specifications:Title of Specification ASTM DesignationSteel Castings, Carbon, Suitable fo
4、r Fusion Welding, A216/A216Mfor High-Temperature ServiceSteel Castings, Martensitic Stainless and Alloy, for A217/A217MPressure-Containing Parts, Suitable for High-Temperature ServiceCastings, Austenitic, Austenitic-Ferritic (Duplex), A351/A351MCastings, Austenitic, for Pressure-Containing A351/A351
5、MPressure-Containing PartsPartsSteel Castings, Ferritic and Martensitic, for Pressure- A352/A352MContaining Parts, Suitable for Low-TemperatureServiceSteel Castings, Alloy, Specially Heat-Treated, for A389/A389MPressure-Containing Parts, Suitable for High-Temperature ServiceSteel Castings Suitable f
6、or Pressure Service A487/A487MCastings, Iron-Nickel-Chromium and Nickel A990/A990MAlloys, Specially Controlled for Pressure RetainingParts for Corrosive ServiceCastings, Austenitic-Ferritic (Duplex) A995/A995MStainless Steel, for Pressure-Containing Parts1.2 This specification also covers a group of
7、 supplementary requirements which may be applied to the above specifications asindicated therein. These are provided for use when additional testing or inspection is desired and apply only when specifiedindividually by the purchaser in the order.1.3 In case of conflict between the requirements of th
8、e individual specification and this general specification, the former shallprevail.1.4 The values stated in either SI units or inch-pound units are to be regarded separately as standard. The values stated in eachsystem may not be exact equivalents; therefore, each system shall be used independently
9、of the other. Combining values from thetwo systems may result in nonconformance with the standard.1.5 This international standard was developed in accordance with internationally recognized principles on standardizationestablished in the Decision on Principles for the Development of International St
10、andards, Guides and Recommendations issuedby the World Trade Organization Technical Barriers to Trade (TBT) Committee.1 This specification is under the jurisdiction ofASTM Committee A01 on Steel, Stainless Steel and RelatedAlloys and is the direct responsibility of Subcommittee A01.18on Castings.Cur
11、rent edition approved Nov. 1, 2017May 1, 2018. Published November 2017May 2018. Originally approved in 1974. Last previous edition approved in 2017 asA703/A703M 17.A703/A703M 17a. DOI: 10.1520/A0703_A0703M-17A.10.1520/A0703_A0703M-18.2 For ASME Boiler and Pressure Vessel Code applications, see relat
12、ed Specification SA-703/SA-703M in Section II of that Code.This document is not an ASTM standard and is intended only to provide the user of an ASTM standard an indication of what changes have been made to the previous version. Becauseit may not be technically possible to adequately depict all chang
13、es accurately, ASTM recommends that users consult prior editions as appropriate. In all cases only the current versionof the standard as published by ASTM is to be considered the official document.*A Summary of Changes section appears at the end of this standardCopyright ASTM International, 100 Barr
14、 Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States12. Referenced Documents2.1 ASTM Standards:3A216/A216M Specification for Steel Castings, Carbon, Suitable for Fusion Welding, for High-Temperature ServiceA217/A217M Specification for Steel Castings, Martensitic Stainless and
15、Alloy, for Pressure-Containing Parts, Suitable forHigh-Temperature ServiceA351/A351M Specification for Castings, Austenitic, for Pressure-Containing PartsA352/A352M Specification for Steel Castings, Ferritic and Martensitic, for Pressure-Containing Parts, Suitable for Low-Temperature ServiceA370 Tes
16、t Methods and Definitions for Mechanical Testing of Steel ProductsA380/A380M Practice for Cleaning, Descaling, and Passivation of Stainless Steel Parts, Equipment, and SystemsA389/A389M Specification for Steel Castings, Alloy, Specially Heat-Treated, for Pressure-Containing Parts, Suitable forHigh-T
17、emperature ServiceA487/A487M Specification for Steel Castings Suitable for Pressure ServiceA488/A488M Practice for Steel Castings, Welding, Qualifications of Procedures and PersonnelA609/A609M Practice for Castings, Carbon, Low-Alloy, and Martensitic Stainless Steel, Ultrasonic Examination ThereofA7
18、51 Test Methods, Practices, and Terminology for Chemical Analysis of Steel ProductsA800/A800M Practice for Steel Casting, Austenitic Alloy, Estimating Ferrite Content ThereofA802/A802M Practice for Steel Castings, Surface Acceptance Standards, Visual ExaminationA903/A903M Specification for Steel Cas
19、tings, Surface Acceptance Standards, Magnetic Particle and Liquid PenetrantInspectionA941 Terminology Relating to Steel, Stainless Steel, Related Alloys, and FerroalloysA967/A967M Specification for Chemical Passivation Treatments for Stainless Steel PartsA990/A990M Specification for Castings, Iron-N
20、ickel-Chromium and NickelAlloys, Specially Controlled for Pressure RetainingParts for Corrosive ServiceA991/A991M Test Method for Conducting Temperature Uniformity Surveys of Furnaces Used to Heat Treat Steel ProductsA995/A995M Specification for Castings, Austenitic-Ferritic (Duplex) Stainless Steel
21、, for Pressure-Containing PartsA1058 Test Methods for Mechanical Testing of Steel ProductsMetricA1067/A1067M Specification for Test Coupons for Steel CastingsA1080 Practice for Hot Isostatic Pressing of Steel, Stainless Steel, and Related Alloy CastingsE29 Practice for Using Significant Digits in Te
22、st Data to Determine Conformance with SpecificationsE94E94/E94M Guide for Radiographic Examination Using Industrial Radiographic FilmE125 Reference Photographs for Magnetic Particle Indications on Ferrous CastingsE165/E165M Practice for Liquid Penetrant Examination for General IndustryE186 Reference
23、 Radiographs for Heavy-Walled (2 to 412 in. (50.8 to 114 mm) Steel CastingsE208 Test Method for Conducting Drop-Weight Test to Determine Nil-Ductility Transition Temperature of Ferritic SteelsE280 Reference Radiographs for Heavy-Walled (412 to 12 in. (114 to 305 mm) Steel CastingsE340 Practice for M
24、acroetching Metals and AlloysE353 Test Methods for Chemical Analysis of Stainless, Heat-Resisting, Maraging, and Other Similar Chromium-Nickel-IronAlloysE354 Test Methods for Chemical Analysis of High-Temperature, Electrical, Magnetic, and Other Similar Iron, Nickel, andCobalt AlloysE446 Reference R
25、adiographs for Steel Castings Up to 2 in. (50.8 mm) in ThicknessE709 Guide for Magnetic Particle Testing2.2 ANSI Standard:4B16.5 Pipe Flanges and Flanged Fittings2.3 Standards of the Manufacturers Standardization Society of the Valve and Fitting Industry:5MSS SP 53 Quality Standard for Steel Casting
26、s and Forgings for Valves, Flanges, and Fittings and Other Piping Components(Magnetic Particle Exam Method)MSS SP 54 Quality Standard for Steel Castings for Valves, Flanges, and Fittings and Other Piping Components (RadiographicExamination Method)3. Terminology3.1 Definitions:3 For referencedASTM st
27、andards, visit theASTM website, www.astm.org, or contactASTM Customer Service at serviceastm.org. For Annual Book of ASTM Standardsvolume information, refer to the standards Document Summary page on the ASTM website.4 Available from American National Standards Institute (ANSI), 25 W. 43rd St., 4th F
28、loor, New York, NY 10036, http:/www.ansi.org.5 Available from Manufacturers Standardization Society of the Valve and Fittings Industry (MSS), 127 Park St., NE, Vienna, VA 22180-4602, http:/www.mss-hq.org.A703/A703M 1823.1.1 The definitions in Test Methods and Definitions A370 and , Terminology A941,
29、 and Test Methods A1058 are applicableto this specification and those listed in 1.1.3.1.2 chaplet, na chaplet is a metallic support placed in a mold cavity to maintain the spacing between a core and the mold.3.1.3 electronic data interchange (EDI), nthe computer-to-computer exchange of business info
30、rmation in a standard formatsuch as ANSI ASC X12.3.1.4 heat, nall the molten metal poured from a single furnace or all the molten metal from two or more furnaces poured intoa single ladle or casting prior to the replenishing of the furnace(s).3.1.5 internal chill, nan internal chill is a metallic de
31、vice placed in a mold cavity to increase the rate of heat removal at thatlocation.3.1.6 test coupon, nthe part from which the test specimen will be extracted.3.1.7 test specimen, nthe part that will be acted upon in a mechanical test.4. Materials and Manufacture4.1 Melting ProcessThe steel shall be
32、made by open-hearth or electric-furnace process, with or without separate refining suchas argon-oxygen-decarburization (AOD), unless otherwise designated by the individual specification.4.2 Heat Treatment:4.2.1 Ferritic and martensitic steel shall be cooled after pouring to provide substantially com
33、plete transformation of austeniteprior to heat treatment to enhance mechanical properties.4.2.2 Castings shall be heat treated in the working zone of a furnace that has been surveyed in accordance with Test MethodA991/A991M.4.2.2.1 When castings are heat treated at temperatures above 2000 F 1100 C,
34、then the working zone shall have beenestablished by a survey performed at not more than 25 F 15 C below nor more than 200 F 110 C above the minimum heattreatment temperature specified for the grade. If a minimum heat treatment temperature is not specified for the grade, then thesurvey temperature sh
35、all be not more than 50 F 30 C below nor more than 175 F 100 C above the furnace set point used.4.2.2.2 The maximum variation in measured temperature as determined by the difference between the highest temperature andthe lowest temperature shall be as agreed between the purchaser and producer, excep
36、t that during production heat treatment noportion of the furnace shall be below the minimum specified temperature nor above the maximum specified temperature for thegrade being processed.5. Chemical Composition5.1 Chemical AnalysisChemical analysis of materials covered by this specification shall be
37、 in accordance with Test MethodsA751.5.2 Heat AnalysisAn analysis of each heat shall be made by the manufacturer to determine the percentages of the elementsspecified. The analysis shall be made from a test sample preferably taken during the pouring of the heat. When drillings are used,they shall be
38、 taken not less than 14 in. 6.4 mm beneath the surface. The chemical composition thus determined shall be reportedto the purchaser, or his representative, and shall conform to the requirements in the individual specification for the grade beingpoured.5.3 Product AnalysisA product analysis may be mad
39、e by the purchaser from material representing each heat, lot, or casting.The analysis shall be made on representative material. Due to the possibility of decarburization, samples for carbon analysis shallbe taken no closer than 14 in. 6.4 mm to a cast surface except that castings too thin for this s
40、hall be analyzed on representativematerial. The chemical composition thus determined shall meet the requirements specified in the applicable specification for thegrade involved, or shall be subject to rejection by the purchaser, except that the chemical composition determined for carbon andlow-alloy
41、 steel and stainless steel castings may vary from the specified limits by the amounts shown in Table 1 and Table 2,respectively. The product analysis tolerances of Tables 1 and 2 are not applicable as acceptance criteria for heat analysis by thecasting manufacturer. When comparing product and heat a
42、nalysis for other than carbon and low-alloy steels and stainless steels,the reproducibility Datadata R2, in Test Methods E353 or E354, as applicable, shall be taken into consideration.5.4 Unspecified ElementsWhen chemical analysis for elements not specified for the grade ordered is desired, Suppleme
43、ntaryRequirement S1 may be specified.5.5 Grade SubstitutionGrade substitution is not permitted. Grade substitution occurs when the material being suppliedcontains one or more elements that are not specified for the supplied material such that the material conforms to the requirementsof a different g
44、rade.5.6 Where more than one ladle is poured into a single casting, the molten metal in each ladle must conform to the specifiedchemical requirements.A703/A703M 1836. Mechanical Test Methods6.1 All mechanical tests shall be conducted in accordance with Test Methods and Definitions A370. When materia
45、l is orderedto an M-suffix (SI units) standard, then in accordance with Test Methods A1058.6.2 Choice of testing track from the options listed in Test Methods A1058 when material is ordered to an M-suffix (SI units)product standard, should be identified by the purchaser in the ordering information.
46、If the choice of test track is not specified inthe order, then the default ASTM track shall be used as noted in Test Methods A1058.7. Tensile Requirements7.1 One tension test shall be made from each heat, and shall conform to the tensile requirements specified. Test coupons shallbe cast from the sam
47、e heat as the castings represented, except that for investment castings, the test coupons shall be cast in thesame type of mold as the castings.67.2 The coupon from which the test specimen is taken shall be heat treated in production furnaces to the same procedure as thecastings it represents.7.3 Te
48、st specimens may be cut from heat-treated castings, at the producers option, instead of from test coupons.7.4 Investment CastingsFor investment castings, the coupons may be cast to shape or machined from coupons to dimensionsin accordance with Test Methods and Definitions A370 or the ICI coupon show
49、n in Specification A1067/A1067M, Fig. 1.6 Information on the relationship of mechanical properties determined on test coupons obtained as specified in 7.1 and 7.4 with those obtained from the casting may befound in The Steel Castings Handbook, Fifth Edition, Steel Founders Society of America, 1980, pp. 1535 through 1543.TABLE 1 Product Analysis Tolerances Carbon and Low-AlloySteelsElement RangeA TolerancesB,C over max orunder min, Limit, %Carbon (C) up to 0.65 %above 0.65 %0.03 % CL + 0.020.04 %Manganese (Mn) up to 1 %above
