1、Designation: A703/A703M 18aStandard 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.1. Scope*1.1 This specificatio
3、n2covers 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 DesignationSteel Castings, Carbon, Suitable for Fusion Wel
4、ding, A216/A216Mfor High-Temperature ServiceSteel Castings, Martensitic Stainless and Alloy, for A217/A217MPressure-Containing Parts, Suitable for High-Temperature ServiceCastings, Austenitic, for Pressure-Containing A351/A351MPartsSteel Castings, Ferritic and Martensitic, for Pressure- A352/A352MCo
5、ntaining 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 and Nickel A990/A990MAlloys, Specially
6、 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 supplementaryrequirements which may be applied to the above specificationsas indicated therein. Th
7、ese 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 and this general specification, theformer shall prevail.1.4 The values st
8、ated 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 from the two systems may result in nonconformancewith the standard.1.5 T
9、his 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-mendations issued by the World Trade Organization TechnicalBarriers to Trad
10、e (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, MartensiticStainless and Alloy, for Pressure-Containing Parts, Suit-able for High-T
11、emperature ServiceA351/A351M Specification for Castings, Austenitic, forPressure-Containing PartsA352/A352M Specification for Steel Castings, Ferritic andMartensitic, for Pressure-Containing Parts, Suitable forLow-Temperature ServiceA370 Test Methods and Definitions for Mechanical Testingof Steel Pr
12、oductsA380/A380M Practice for Cleaning, Descaling, and Passi-vation of Stainless Steel Parts, Equipment, and SystemsA389/A389M Specification for Steel Castings, Alloy, Spe-cially Heat Treated, for Pressure-Containing Parts, Suit-able for High-Temperature ServiceA487/A487M Specification for Steel Cas
13、tings Suitable forPressure ServiceA488/A488M Practice for Steel Castings, Welding, Qualifi-cations of Procedures and PersonnelA609/A609M Practice for Castings, Carbon, Low-Alloy,and Martensitic Stainless Steel, Ultrasonic ExaminationThereof1This specification is under the jurisdiction of ASTM Commit
14、tee A01 on Steel,Stainless Steel and Related Alloys and is the direct responsibility of SubcommitteeA01.18 on Castings.Current edition approved Sept. 1, 2018. Published September 2018. Originallyapproved in 1974. Last previous edition approved in 2018 as A703/A703M 18.DOI: 10.1520/A0703_A0703M-18A.2
15、For ASME Boiler and Pressure Vessel Code applications, see related Specifi-cation SA-703/SA-703M in Section II of that Code.3For referenced ASTM standards, visit the ASTM website, www.astm.org, orcontact ASTM Customer Service at serviceastm.org. For Annual Book of ASTMStandards volume information, r
16、efer to the standards Document Summary page onthe ASTM website.*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 StatesThis international standard was developed in accordance wit
17、h internationally recognized principles on standardization established in the Decision on Principles for theDevelopment of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.1A751 Test Methods, Practices, and Termino
18、logy 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 Specification for Steel Castings, Surface Ac-ceptance Standards,
19、Magnetic Particle and Liquid Pen-etrant InspectionA941 Terminology Relating to Steel, Stainless Steel, RelatedAlloys, and FerroalloysA967/A967M Specification for Chemical Passivation Treat-ments for Stainless Steel PartsA990/A990M Specification for Castings, Iron-Nickel-Chromium and Nickel Alloys, S
20、pecially Controlled forPressure-Retaining Parts 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 Steel, for Pressure-Containing PartsA1058
21、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 Test Data toDetermine Conformance with Spe
22、cificationsE94/E94M Guide for Radiographic Examination Using In-dustrial Radiographic FilmE125 Reference Photographs for Magnetic Particle Indica-tions on Ferrous CastingsE165/E165M Practice for Liquid Penetrant Examination forGeneral IndustryE186 Reference Radiographs for Heavy-Walled (2 to 412 in.
23、(50.8 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 Method
24、s for 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.
25、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 Societyof the Valve and Fitting Industry:5MSS SP 53 Quality Standard for Steel Castings and Forg-ings for Valves, Flanges, and Fittin
26、gs 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 A370,Terminolo
27、gy A941, and Test Methods A1058 are applicable tothis specification and to 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), nthe computer-to-computer exchange of busi
28、ness 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 internal chill, nan internal chill is a meta
29、llic 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 Manufacture4.1 Melting ProcessThe steel shall
30、 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 cooled afterpouring to provide substantially c
31、omplete 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 treated at temperaturesabove 2000 F 1100 C,
32、 then the working zone shall havebeen established by a survey performed at not more than 25 F15 C below nor more than 200 F 110 C above theminimum heat treatment temperature specified for the grade. Ifa minimum heat treatment temperature is not specified for thegrade, then the survey temperature sha
33、ll be not more than 50 F4Available from American National Standards Institute (ANSI), 25 W. 43rd St.,4th Floor, New York, NY 10036, http:/www.ansi.org.5Available from Manufacturers Standardization Society of the Valve and FittingsIndustry (MSS), 127 Park St., NE, Vienna, VA 22180-4602, http:/www.mss
34、-hq.org.A703/A703M 18a230 C below nor more than 175 F 100 C above thefurnace set 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 thepurchaser and producer, except that
35、 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 this specification shall be in acco
36、rdance 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. Whendrillings are used, they shall be taken not
37、 less than14 in.6.4 mm beneath the surface. The chemical composition thusdetermined shall be reported to the purchaser, or theirrepresentative, and shall conform to the requirements in theindividual specification for the grade being poured.5.3 Product AnalysisA product analysis may be made bythe pur
38、chaser 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 too thin for this shall be analyz
39、edon 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 carbon and low-alloy steel and s
40、tainlesssteel castings may vary from the specified limits by theamounts shown in Table 1 and Table 2, respectively. Theproduct analysis tolerances of Tables 1 and 2 are not applicableas acceptance criteria for heat analysis by the casting manu-facturer. When comparing product and heat analysis for o
41、therthan carbon and low-alloy steels and stainless steels, thereproducibility data R2, in Test Methods E353 or E354,asapplicable, shall be taken into consideration.5.4 Unspecified ElementsWhen chemical analysis for el-ements not specified for the grade ordered is desired, Supple-mentary Requirement
42、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 of a different grade.5.6 Where more
43、 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 material isordered to an M-suffix (SI unit
44、s) 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 the choice of test track is notspec
45、ified 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 couponsshall be cast from the same heat as the castings represented,excep
46、t that for investment castings, the test coupons shall becast in the same type of mold as the castings.66Information on the relationship of mechanical properties determined on testcoupons obtained as specified in 7.1 and 7.4 with those obtained from the castingmay be found in The Steel Castings Hand
47、book, Fifth Edition, Steel FoundersSociety of America, 1980, pp. 1535 through 1543.TABLE 1 Product Analysis Tolerances 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 % M
48、nL+ 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) 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
49、 %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+ 0.020.02 %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 aconstant.BThe subscriptLfor the elements in each equation indicates that the limits of theelement specified
