1、Designation: A703/A703M 151Standard 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 case of revision
2、, 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.1NOTETable 2 was editorially c
3、orrected in April 2017.1. Scope*1.1 This specification2covers a group of common require-ments that, unless otherwise specified in an individualspecification, shall apply to steel castings for pressure-containing parts under each of the following ASTM specifica-tions:Title of Specification ASTM Desig
4、nationSteel Castings, Carbon, Suitable for 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-Conta
5、ining PartsSteel 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 for Pressure Service
6、A487/A487MCastings, Iron-Nickel-Chromium 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 supplementaryrequirements w
7、hich may be applied to the above specificationsas indicated therein. These are provided for use when addi-tional testing or inspection is desired and apply only whenspecified individually by the purchaser in the order.1.3 In case of conflict between the requirements of theindividual specification an
8、d this general specification, theformer shall prevail.1.4 The values stated in either SI units or inch-pound unitsare to be regarded separately as standard. The values stated ineach system may not be exact equivalents; therefore, eachsystem shall be used independently of the other. Combiningvalues f
9、rom the two systems may result in non-conformancewith the standard.1.5 This international standard was developed in accor-dance with internationally recognized principles on standard-ization established in the Decision on Principles for theDevelopment of International Standards, Guides and Recom-men
10、dations issued by the World Trade Organization TechnicalBarriers to Trade (TBT) Committee.2. Referenced Documents2.1 ASTM Standards:3A216/A216M Specification for Steel Castings, Carbon, Suit-able for Fusion Welding, for High-Temperature ServiceA217/A217M Specification for Steel Castings, Martensitic
11、Stainless and Alloy, for Pressure-Containing Parts, Suit-able for High-Temperature ServiceA351/A351M Specification for Castings, Austenitic, forPressure-Containing PartsA352/A352M Specification for Steel Castings, Ferritic andMartensitic, for Pressure-Containing Parts, Suitable forLow-Temperature Se
12、rviceA370 Test Methods and Definitions for Mechanical Testingof Steel ProductsA380 Practice for Cleaning, Descaling, and Passivation ofStainless Steel Parts, Equipment, and SystemsA389/A389M Specification for Steel Castings, Alloy, Spe-cially Heat-Treated, for Pressure-Containing Parts, Suit-able fo
13、r High-Temperature ServiceA487/A487M Specification for Steel Castings Suitable forPressure Service1This specification is under the jurisdiction of ASTM Committee A01 on Steel,Stainless Steel and Related Alloys and is the direct responsibility of SubcommitteeA01.18 on Castings.Current edition approve
14、d June 1, 2015. Published June 2015. Originallyapproved in 1974. Last previous edition approved in 2014 as A703/A703M 14.DOI: 10.1520/A0703_A0703M-15E01.2For ASME Boiler and Pressure Vessel Code applications see related Specifi-cation SA-703/SA-703M in Section II of that Code.3For referenced ASTM st
15、andards, 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.*A Summary of Changes section appears at the end of this standardCopyright ASTM Inte
16、rnational, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United StatesThis international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for theDevelopment of International Standards,
17、 Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.1A488/A488M Practice for Steel Castings, Welding, Qualifi-cations of Procedures and PersonnelA609/A609M Practice for Castings, Carbon, Low-Alloy,and Martensitic Stainless Steel, Ultrasonic
18、ExaminationThereofA751 Test Methods, Practices, and Terminology for Chemi-cal Analysis of Steel ProductsA800/A800M Practice for Steel Casting, Austenitic Alloy,Estimating Ferrite Content ThereofA802/A802M Practice for Steel Castings, Surface Accep-tance Standards, Visual ExaminationA903/A903M Specif
19、ication for Steel Castings, Surface Ac-ceptance Standards, Magnetic Particle and Liquid Pen-etrant InspectionA941 Terminology Relating to Steel, Stainless Steel, RelatedAlloys, and FerroalloysA967 Specification for Chemical Passivation Treatments forStainless Steel PartsA990 Specification for Castin
20、gs, Iron-Nickel-Chromium andNickelAlloys, Specially Controlled for Pressure RetainingParts for Corrosive ServiceA991/A991M Test Method for Conducting TemperatureUniformity Surveys of Furnaces Used to Heat Treat SteelProductsA995/A995M Specification for Castings, Austenitic-Ferritic(Duplex) Stainless
21、 Steel, for Pressure-Containing PartsA1058 Test Methods for Mechanical Testing of SteelProductsMetricA1067/A1067M Specification for Test Coupons for SteelCastingsA1080 Practice for Hot Isostatic Pressing of Steel, StainlessSteel, and Related Alloy CastingsE29 Practice for Using Significant Digits in
22、 Test Data toDetermine Conformance with SpecificationsE94 Guide for Radiographic ExaminationE125 Reference Photographs for Magnetic Particle Indica-tions on Ferrous CastingsE165 Practice for Liquid Penetrant Examination for GeneralIndustryE186 Reference Radiographs for Heavy-Walled (2 to 412 in.(50.
23、8 to 114 mm) Steel CastingsE208 Test Method for Conducting Drop-Weight Test toDetermine Nil-Ductility Transition Temperature of Fer-ritic SteelsE280 Reference Radiographs for Heavy-Walled (412 to 12in. (114 to 305 mm) Steel CastingsE340 Practice for Macroetching Metals and AlloysE353 Test Methods fo
24、r Chemical Analysis of Stainless,Heat-Resisting, Maraging, and Other Similar Chromium-Nickel-Iron AlloysE354 Test Methods for Chemical Analysis of High-Temperature, Electrical, Magnetic, and Other Similar Iron,Nickel, and Cobalt AlloysE446 Reference Radiographs for Steel Castings Up to 2 in.(50.8 mm
25、) in ThicknessE709 Guide for Magnetic Particle Testing2.2 ANSI Standard:4B16.5 Pipe Flanges and Flanged Fittings2.3 Standards of the Manufacturers Standardization Soci-ety of the Valve and Fitting Industry:5MSS SP 53 Quality Standard for Steel Castings and Forg-ings for Valves, Flanges and Fittings
26、and Other PipingComponents (Magnetic Particle Exam Method)MSS SP 54 Quality Standard for Steel Castings for Valves,Flanges, and Fittings and Other Piping Components (Ra-diographic Examination Method)3. Terminology3.1 Definitions:3.1.1 The definitions in Test Methods and Definitions A370and Terminolo
27、gy A941 and Test Methods for MechanicalTesting of Steel Products Metric A1058 are applicable to thisspecification and those listed in 1.1.3.1.2 chaplet, na chaplet is a metallic support placed in amold cavity to maintain the spacing between a core and themold.3.1.3 electronic data interchange (EDI),
28、 nthe computer-to-computer exchange of business information in a standardformat such as ANSI ASC X12.3.1.4 heat, nall the molten metal poured from a singlefurnace or all the molten metal from two or more furnacespoured into a single ladle or casting prior to the replenishing ofthe furnace(s).3.1.5 i
29、nternal chill, nan internal chill is a metallic deviceplaced in a mold cavity to increase the rate of heat removal atthat location.3.1.6 test coupon, nthe part from which the test specimenwill be extracted.3.1.7 test specimen, nthe part that will be acted upon in amechanical test.4. Materials and Ma
30、nufacture4.1 Melting ProcessThe steel shall be made by open-hearth or electric-furnace process, with or without separaterefining such as argon-oxygen-decarburization (AOD), unlessotherwise designated by the individual specification.4.2 Heat Treatment:4.2.1 Ferritic and martensitic steel shall be coo
31、led afterpouring to provide substantially complete transformation ofaustenite prior to heat treatment to enhance mechanical prop-erties.4.2.2 Castings shall be heat treated in the working zone of afurnace that has been surveyed in accordance with Test MethodA991/A991M.4.2.2.1 When castings are heat
32、treated at temperaturesabove 2000F 1100C, then the working zone shall have beenestablished by a survey performed at not more than 25F4Available from American National Standards Institute (ANSI), 25 W. 43rd St.,4th Floor, New York, NY 10036, http:/www.ansi.org.5Available from Manufacturers Standardiz
33、ation Society of the Valve and FittingsIndustry (MSS), 127 Park St., NE, Vienna, VA 22180-4602, http:/www.mss-hq.org.A703/A703M 151215C below nor more than 200F 110C above the mini-mum heat treatment temperature specified for the grade. If aminimum heat treatment temperature is not specified for the
34、grade, then the survey temperature shall be not more than 50F30C below nor more than 175F 100C above the furnaceset point used.4.2.2.2 The maximum variation in measured temperature asdetermined by the difference between the highest temperatureand the lowest temperature shall be as agreed between the
35、purchaser and producer except that during production heattreatment, no portion of the furnace shall be below theminimum specified temperature nor above the maximumspecified temperature for the grade being processed.5. Chemical Composition5.1 Chemical AnalysisChemical analysis of materialscovered by
36、this specification shall be in accordance with TestMethods A751.5.2 Heat AnalysisAn analysis of each heat shall be madeby the manufacturer to determine the percentages of theelements specified. The analysis shall be made from a testsample preferably taken during the pouring of the heat. Whendrilling
37、s are used, they shall be taken not less than14 in. 6.4mm beneath the surface. The chemical composition thusdetermined shall be reported to the purchaser, or hisrepresentative, and shall conform to the requirements in theindividual specification for the grade being poured.5.3 Product AnalysisA produ
38、ct analysis may be made bythe purchaser from material representing each heat, lot, orcasting. The analysis shall be made on representative material.Due to the possibility of decarburization, samples for carbonanalysis shall be taken no closer than14 in. 6.4 mm to a castsurface except that castings t
39、oo thin for this shall be analyzedon representative material. The chemical composition thusdetermined shall meet the requirements specified in the appli-cable specification for the grade involved, or shall be subject torejection by the purchaser, except that the chemical composi-tion determined for
40、carbon and low-alloy steel and stainlesssteel castings may vary from the specified limits by theamounts shown in Table 1 and Table 2 respectively. Theproduct analysis tolerances of Table 1 and Table 2 are notapplicable as acceptance criteria for heat analysis by thecasting manufacturer. When compari
41、ng product and heatanalysis for other than carbon and low alloy steels and stainlesssteels, the reproducibility Data R2, in Test Methods E353 orE354, as applicable, shall be taken into consideration.5.4 Unspecified ElementsWhen chemical analysis for el-ements not specified for the grade ordered is d
42、esired, Supple-mentary Requirement 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 thesupplied material such that the material conforms to therequirements
43、of a different grade.5.6 Where more than one ladle is poured into a singlecasting, the molten metal in each ladle must conform to thespecified chemical requirements.6. Mechanical Test Methods6.1 All mechanical tests shall be conducted in accordancewith Test Methods and Definitions A370. When materia
44、l isordered to an M-suffix (SI units) standard, then in accordancewith Test Methods A1058.6.2 Choice of testing track from the options listed in TestMethods A1058 when material is ordered to an M suffix (SIunits) product standard, should be identified by the purchaserin the ordering information. If
45、the choice of test track is notspecified in the order, then the default ASTM track shall beused as noted in Test Methods A1058.7. Tensile Requirements7.1 One tension test shall be made from each heat, and shallconform to the tensile requirements specified. Test couponsTABLE 1 Product Analysis Tolera
46、nces Carbon and Low-AlloySteelsElement RangeA TolerancesB,Cover 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 1 %0.08 % MnL+ 0.010.09Silicon (Si) up to 0.60 %above 0.60 %0.22 % SiL 0.010.15 %Phosphorus (P) all 0.13 % PL+ 0.005Sulfur (S
47、) all 0.36 % SL+ 0.001Nickel (Ni) up to 2 %above 2 %0.10 % NiL+ 0.030.25 %Chromium (Cr) up to 2 %above 2 %0.07 % CrL+ 0.040.18 %Molybdenum (Mo) up to 0.6 %above 0.6 %0.04 % MoL+ 0.030.06 %Vanadium (V) up to 0.25 %above 0.25 %0.23 % VL+ 0.0040.06 %Tungsten (W) up to 0.10 %above 0.10 %0.08 % WL+ 0.020
48、.02 %Copper (Cu) up to 0.15 %above 0.15 %0.18 % CuL+ 0.020.05 %Aluminum (Al) up to 0.03 %0.03 to 0.10 %, incl.above 0.10 %0.01 %0.08 % Al + 0.020.03 %AThe range denotes the composition limits up to which the tolerances arecomputed by the equation, and above which the tolerances are given by aconstan
49、t.BThe subscriptLfor the elements in each equation indicates that the limits of theelement specified by the applicable specification are to be inserted into theequation to calculate the tolerance for the upper limit and the lower limit, ifapplicable, respectively. Examples of computing tolerances are presented in thefootnote C.CTo compute the tolerances, consider the manganese limits 0.50 80 % of GradeWC4 of Specification A217/A217M. In accordance with Table 1, the maximumpermissible deviation of a produ
