1、Designation: A703/A703M 13aA703/A703M 14Standard 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/A351MPressure-Containing PartsSteel Castings, Ferritic and M
5、artensitic, 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 for Pressure Service A487/A487MCastings, Iron-Nickel-Chromium
6、and Nickel Alloys,Specially Controlled for Pressure Retaining Parts forCorrosive ServiceA990Castings, Austenitic-Ferritic (Duplex) Stainless Steel,for Pressure-Containing PartsA995/A995M1.2 This specification also covers a group of supplementary requirements which may be applied to the above specifi
7、cations 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 the individual specification and this general specification, the former
8、 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 of the other. Combining values from thetwo systems may result in non-
9、conformance with the standard.2. 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 Alloy, for Pressure-Containing Parts, Suitable
10、 forHigh-Temperature ServiceA351/A351M Specification for Castings, Austenitic, for Pressure-Containing Parts1 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.Current editi
11、on approved Oct. 1, 2013Oct. 1, 2014. Published October 2013October 2014. Originally approved in 1974. Last previous edition approved in 2013 asA703/A703M 13.A703/A703M 13a. DOI: 10.1520/A0703_A0703M-13A.10.1520/A0703_A0703M-14.2 For ASME Boiler and Pressure Vessel Code applications see related Spec
12、ification SA-703/SA-703M in Section II of that Code.3 For referencedASTM standards, 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.This docu
13、ment 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 changes accurately, ASTM recommends that users consult prior editions as
14、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 Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United
15、 States1A352/A352M Specification for Steel Castings, Ferritic and Martensitic, for Pressure-Containing Parts, Suitable for Low-Temperature ServiceA370 Test Methods and Definitions for Mechanical Testing of Steel ProductsA380 Practice for Cleaning, Descaling, and Passivation of Stainless Steel Parts,
16、 Equipment, and SystemsA389/A389M Specification for Steel Castings, Alloy, Specially Heat-Treated, for Pressure-Containing Parts, Suitable forHigh-Temperature ServiceA487/A487M Specification for Steel Castings Suitable for Pressure ServiceA488/A488M Practice for Steel Castings, Welding, Qualificatio
17、ns of Procedures and PersonnelA609/A609M Practice for Castings, Carbon, Low-Alloy, and Martensitic Stainless Steel, Ultrasonic Examination ThereofA751 Test Methods, Practices, and Terminology for Chemical Analysis of Steel ProductsA800/A800M Practice for Steel Casting, Austenitic Alloy, Estimating F
18、errite Content ThereofA802/A802M Practice for Steel Castings, Surface Acceptance Standards, Visual ExaminationA903/A903M Specification for Steel Castings, Surface Acceptance Standards, Magnetic Particle and Liquid PenetrantInspectionA941 Terminology Relating to Steel, Stainless Steel, Related Alloys
19、, and FerroalloysA967 Specification for Chemical Passivation Treatments for Stainless Steel PartsA990 Specification for Castings, Iron-Nickel-Chromium and Nickel Alloys, Specially Controlled for Pressure Retaining Partsfor Corrosive ServiceA991/A991M Test Method for Conducting Temperature Uniformity
20、 Surveys of Furnaces Used to Heat Treat Steel ProductsA995/A995M Specification for Castings, Austenitic-Ferritic (Duplex) Stainless Steel, for Pressure-Containing PartsA1058 Test Methods for Mechanical Testing of Steel ProductsMetricA1067/A1067M Specification for Test Coupons for Steel CastingsA1080
21、 Practice for Hot Isostatic Pressing of Steel, Stainless Steel, and Related Alloy CastingsE29 Practice for Using Significant Digits in Test Data to Determine Conformance with SpecificationsE94 Guide for Radiographic ExaminationE125 Reference Photographs for Magnetic Particle Indications on Ferrous C
22、astingsE165 Practice for Liquid Penetrant Examination for General IndustryE186 Reference 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 Radio
23、graphs for Heavy-Walled (412 to 12-in. (114 to 305-mm) Steel CastingsE340 Test Method for Macroetching 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-Temperat
24、ure, Electrical, Magnetic, and Other Similar Iron, Nickel, andCobalt AlloysE446 Reference Radiographs 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 Standardizat
25、ion Society of the Valve and Fitting Industry:5MSS SP 53 Quality Standard for Steel Castings 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 Compon
26、ents (RadiographicExamination Method)3. Terminology3.1 Definitions:3.1.1 The definitions in Test Methods and Definitions A370 and Terminology A941 and Test Methods for Mechanical Testingof Steel Products Metric A1058 are applicable to this specification and those listed in 1.1.3.1.2 chaplet, na chap
27、let 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 information in a standard formatsuch as ANSI ASC X12.3.1.4 heat, nall the molten metal poured from a single fu
28、rnace or all the molten metal from two or more furnaces poured intoa single ladle or casting prior to the replenishing of the furnace(s).4 Available from American National Standards Institute (ANSI), 25 W. 43rd St., 4th Floor, New York, NY 10036, http:/www.ansi.org.5 Available from Manufacturers Sta
29、ndardization Society of the Valve and Fittings Industry (MSS), 127 Park St., NE, Vienna, VA 22180-4602, http:/www.mss-hq.org.A703/A703M 1423.1.5 internal chill, nan internal chill is a metallic device placed in a mold cavity to increase the rate of heat removal at thatlocation.3.1.6 test coupon, nth
30、e 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 made by open-hearth or electric-furnace process, with or without separate refining suchas argon-oxygen-d
31、ecarburization (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 complete transformation of austeniteprior to heat treatment to enhance mechanical properties.4.2.2 Castings
32、 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 2000F 1100C, then the working zone shall have beenestablished by a survey performed at not more than 25F 15C below nor
33、more than 200F 110C above the minimum heattreatment temperature specified for the grade. If a minimum heat treatment temperature is not specified for the grade, then thesurvey temperature shall be not more than 50F 30C below nor more than 175F 100C above the furnace set point used.4.2.2.2 The maximu
34、m 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 except that during production heat treatment, noportion of the furnace shall be below the minimum specified temperature
35、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 in accordance with Test MethodsA751.5.2 Heat AnalysisAn analysis of each heat shall be made by the manufacturer t
36、o 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 taken not less than 14 in. 6.4 mm beneath the surface. The chemical composition thus determined shall be reported
37、to 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 made by the purchaser from material representing each heat, lot, or casting.The analysis shall be made on representat
38、ive 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 shall be analyzed on representativematerial. The chemical composition thus determined shall meet the requirements s
39、pecified 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 steel and stainless steel castings may vary from the specified limits by the amounts shown in Table 1 and Table 2
40、respectively. The product analysis tolerances of Table 1 and Table 2 are not applicable as acceptance criteria for heat analysis bythe casting manufacturer. When comparing product and heat analysis for other than carbon and low alloy steels and stainless steels,the reproducibility Data R2, in Test M
41、ethods 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, SupplementaryRequirement S1 may be specified.5.5 Grade substitutionGrade substitution is not permitted. Grade substitution
42、 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 grade.5.6 Where more than one ladle is poured into a single casting, the molten metal in each ladle must conform to
43、 the specifiedchemical requirements.6. Mechanical Test Methods6.1 All mechanical tests shall be conducted in accordance with Test Methods and Definitions A370. When material is orderedto an M-suffix (SI units) standard, then in accordance with Test Methods A1058.6.2 Choice of testing track from the
44、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. If the choice of test track is not specified inthe order, then the default ASTM track shall be used as noted in Test Methods A10
45、58.A703/A703M 1437. 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 same heat as the castings represented, except that for investment castings, the test coupons shall be cast in thesame
46、 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 Test specimens may be cut from heat-treated castings, at the producers option, instead of from test coupons.7.4 Inve
47、stment 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 shown in A1067/A1067M, Fig. 1.7.5 Other CastingsUnless otherwise specified by the purchaser, test coupons may be cast
48、integrally with the castings or asseparately in accordance with A1067/A1067M, Fig. 1 and Table 1, with Fig. 2, or with Fig. 4, except when SupplementaryRequirement S26 is specified. The test coupon in A1067/A1067M, Fig. 4 shall be employed only for austenitic alloy castings withcross sections less t
49、han 212 in. 63.5 mm. Tension test specimens shall be prepared in accordance with Test Methods andDefinitions A370 or Test Methods A1058 as applicable.7.6 If any specimen shows defective machining or develops flaws, it may be discarded and another substituted from the sameheat.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 Americ
