1、Designation: A 703/A 703M 08aStandard Specification forSteel Castings, General Requirements, for Pressure-Containing Parts1This standard is issued under the fixed designationA 703/A 703M; the number immediately following the designation indicates the yearof original adoption or, in the case of revis
2、ion, 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 Department of Defense.1. Scope*1.1 This specification2
3、covers a group of common require-ments that, unless otherwise specified in an individual speci-fication, shall apply to steel castings for pressure-containingparts under each of the following ASTM specifications:Title of Specification ASTM DesignationSteel Castings, Carbon, Suitable for Fusion Weldi
4、ng, A 216/A 216Mfor High-Temperature ServiceSteel Castings, Martensitic Stainless and Alloy, for A 217/A 217MPressure-Containing Parts, Suitable for High-Temperature ServiceCastings, Austenitic, Austenitic-Ferritic (Duplex), A 351/A 351MPressure-Containing PartsSteel Castings, Ferritic and Martensit
5、ic, for Pressure- A 352/A 352MContaining Parts, Suitable for Low-TemperatureServiceSteel Castings, Alloy, Specially Heat-Treated, for A 389/A 389MPressure-Containing Parts, Suitable for High-Temperature ServiceSteel Castings Suitable for Pressure Service A 487/A 487MCastings, Iron-Nickel-Chromium an
6、d Nickel Alloys,Specially Controlled for Pressure Retaining Parts forCorrosive ServiceA 990Castings, Austenitic-Ferritic (Duplex) Stainless Steel,for Pressure-Containing PartsA 995/A 995M1.2 This specification also covers a group of supplementaryrequirements which may be applied to the above specifi
7、cationsas 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 and this general specification, theformer
8、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 from the two systems may result in non-co
9、nformancewith the standard.2. Referenced Documents2.1 ASTM Standards:3A 216/A 216M Specification for Steel Castings, Carbon,Suitable for Fusion Welding, for High-Temperature Ser-viceA 217/A 217M Specification for Steel Castings, MartensiticStainless and Alloy, for Pressure-Containing Parts, Suit-abl
10、e for High-Temperature ServiceA 351/A 351M Specification for Castings, Austenitic, forPressure-Containing PartsA 352/A 352M Specification for Steel Castings, Ferritic andMartensitic, for Pressure-Containing Parts, Suitable forLow-Temperature ServiceA 370 Test Methods and Definitions for Mechanical T
11、estingof Steel ProductsA 380 Practice for Cleaning, Descaling, and Passivation ofStainless Steel Parts, Equipment, and SystemsA 389/A 389M Specification for Steel Castings, Alloy, Spe-cially Heat-Treated, for Pressure-Containing Parts, Suit-able for High-Temperature ServiceA 487/A 487M Specification
12、 for Steel Castings Suitable forPressure ServiceA 488/A 488M Practice for Steel Castings, Welding, Quali-fications of Procedures and PersonnelA 609/A 609M Practice for Castings, Carbon, Low-Alloy,and Martensitic Stainless Steel, Ultrasonic ExaminationThereofA 751 Test Methods, Practices, and Termino
13、logy forChemical Analysis of Steel ProductsA 800/A 800M Practice for Steel Casting, Austenitic Alloy,Estimating Ferrite Content Thereof1This specification is under the jurisdiction of ASTM Committee A01 on Steel,Stainless Steel and Related Alloys and is the direct responsibility of SubcommitteeA01.1
14、8 on Castings.Current edition approved Nov. 1, 2008. Published December 2008. Originallyapproved in 1974. Last previous edition approved in 2008 as A 703/A 703M 08.2For ASME Boiler and Pressure Vessel Code applications see related Specifi-cation SA-703/SA-703M in Section II of that Code.3For referen
15、ced ASTM standards, 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.1*A Summary of Changes section appears at the end of this standard.Copyri
16、ght ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.A 802/A 802M Practice for Steel Castings, Surface Accep-tance Standards, Visual ExaminationA 903/A 903M Specification for Steel Castings, SurfaceAcceptance Standards, Magnetic Particle and Liq
17、uid Pen-etrant InspectionA 941 Terminology Relating to Steel, Stainless Steel, Re-lated Alloys, and FerroalloysA 967 Specification for Chemical Passivation Treatmentsfor Stainless Steel PartsA 990 Specification for Castings, Iron-Nickel-Chromiumand Nickel Alloys, Specially Controlled for PressureRet
18、aining Parts for Corrosive ServiceA 991/A 991M Test Method for Conducting TemperatureUniformity Surveys of Furnaces Used to Heat Treat SteelProductsA 995/A 995M Specification for Castings, Austenitic-Ferritic (Duplex) Stainless Steel, for Pressure-ContainingPartsE29 Practice for Using Significant Di
19、gits in Test Data toDetermine Conformance with SpecificationsE94 Guide for Radiographic ExaminationE 125 Reference Photographs for Magnetic Particle Indica-tions on Ferrous CastingsE 165 Test Method for Liquid Penetrant ExaminationE 186 Reference Radiographs for Heavy-Walled (2 to 41/2-in. 51 to 114
20、-mm) Steel CastingsE 208 Test Method for Conducting Drop-Weight Test toDetermine Nil-Ductility Transition Temperature of FerriticSteelsE 280 Reference Radiographs for Heavy-Walled (4 1/2 to12-in. 114 to 305-mm) Steel CastingsE 340 Test Method for Macroetching Metals and AlloysE 446 Reference Radiogr
21、aphs for Steel Castings Up to 2 in.51 mm in ThicknessE 709 Guide for Magnetic Particle Testing2.2 ANSI Standard:4B16.5 Steel 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 f
22、or Valves,Flanges and Fittings, and Other Piping Components (DryPowder Magnetic Particle Inspection Method)MSS SP 54 Quality Standard for Steel Castings for Valves,Flanges and Fittings, and Other Piping Components (Ra-diographic Inspection Method)3. Terminology3.1 Definitions:3.1.1 The definitions i
23、n Test Methods and Definitions A 370and Terminology A 941 are applicable to this specification andthose 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-co
24、mputer 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 internal chill, nan i
25、nternal 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 Manufacture4.1 Melting
26、 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 cooled afterpouring to
27、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 MethodA 991/A 991M.4.2.2.1 When castings are heat treated at tempera
28、turesabove 2000F 1100C, then the working zone shall have beenestablished by a survey performed at not more than 25F15C 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 thegrade, then the s
29、urvey 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 thepurchaser and pro
30、ducer 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 this specificatio
31、n shall be in accordance with TestMethods A 751.5.2 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
32、 shall be taken not less than14 in. 6.4mm beneath the surface. The chemical composition thus4Available 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 FittingsIn
33、dustry (MSS), 127 Park St., NE, Vienna, VA 22180-4602, http:/www.mss-.A 703/A 703M 08a2determined shall be reported to the purchaser, or his represen-tative, and shall conform to the requirements in the individualspecification for the grade being poured.5.3 Product AnalysisA product analysis may be
34、made bythe purchaser from material representing each heat, lot, orcasting. The analysis shall be made on representative material.Due to the possibility of decarburization, carbon and alloy steelsamples for carbon analysis shall be taken no closer than14 in.6.4 mm to a cast surface except that castin
35、gs too thin for thisshall be analyzed on representative material. The chemicalcomposition thus determined shall meet the requirementsspecified in the applicable specification for the grade involved,or shall be subject to rejection by the purchaser, except that thechemical composition determined for
36、carbon and low-alloysteel castings may vary from the specified limits by theamounts shown in Table 1. The product analysis tolerances ofTable 1 are not applicable as acceptance criteria for heatanalysis by the casting manufacturer.5.4 Unspecified ElementsWhen chemical analysis for el-ements not spec
37、ified for the grade ordered is desired, Supple-mentary Requirement S1 may be specified.5.4.1 Grade substitution for stainless and nickel base alloycastings is not permitted. Grade substitution occurs when thematerial supplied: (1) contains an element, other the nitrogen,that is not specified in the
38、ordered grade, and (2) the amount ofthat element equals or exceeds the minimum requirement forthe element in another grade for which it is specified. For thisrequirement, a grade is defined as an alloy described individu-ally in a table of chemical requirements within any specifica-tion listed withi
39、n the scope of this section.5.5 The substitution of a grade or composition differentfrom that specified by the purchaser is prohibited.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 Me
40、thods6.1 All mechanical tests shall be conducted in accordancewith Test Methods and Definitions A 370.7. 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 represe
41、nted,except that for investment castings, the test coupons shall becast in the same type of mold as the castings.67.2 The coupon from which the test specimen is taken shallbe heat treated in production furnaces to the same procedure asthe castings it represents.7.3 Test specimens may be cut from hea
42、t-treated castings, atthe producers option, instead of from test coupons.7.4 Investment CastingsFor investment castings, the cou-pons may be cast to shape or machined from coupons todimensions in accordance with Test Methods and DefinitionsA 370 or the ICI coupon shown in Fig. 1.7.5 Other CastingsUn
43、less otherwise specified by thepurchaser, test coupons may be cast integrally with the castingsor as separately in accordance with Fig. 2 and Table 2, withFig. 3, or with Fig. 4, except when Supplementary Require-ment S26 is specified. The test coupon in Fig. 4 shall beemployed only for austenitic a
44、lloy castings with cross sectionsless than 212 in. 63.5 mm. Tension test specimens shall beprepared in accordance with Test Methods and DefinitionsA 370.7.6 If any specimen shows defective machining or developsflaws, it may be discarded and another substituted from thesame heat.7.7 To determine conf
45、ormance with the tension test require-ments, an observed value or calculated value shall be roundedoff in accordance with Practice E29to the nearest 500 psi 5MPa for yield and tensile strength and to the nearest 1 % forelongation and reduction of area.8. Repair by Welding8.1 Repair by welding shall
46、be in accordance with therequirements of individual specification using procedures andwelders qualified in accordance with Practice A 488/A 488M.6Information on the relationship of mechanical properties determined on testcoupons obtained as specified in 7.1 and 7.4 with those obtained from the casti
47、ngmay be found in The Steel Castings Handbook , Fifth Edition, Steel FoundersSociety of America, 1980, pp. 15-35 through 15-43.TABLE 1 Product Analysis Tolerances for Carbon and Low-AlloySteelsElement RangeATolerancesB,Cover max orunder min, Limit, %Carbon (C) up to 0.65 %above 0.65 %0.03 3 %CL+ 0.0
48、20.04 %Manganese (Mn) up to 1 %above 1 %0.08 3 %MnL+ 0.010.09Silicon (Si) up to 0.60 %above 0.60 %0.22 3 %SiL 0.010.15 %Phosphorus (P) all 0.13 3 %PL+ 0.005Sulfur (S) all 0.36 3 %SL+ 0.001Nickel (Ni) up to 2 %above 2 %0.10 3 %NiL+ 0.030.25 %Chromium (Cr) up to 2 %above 2 %0.07 3 %CrL+ 0.040.18 %Moly
49、bdenum (Mo) up to 0.6 %above 0.6 %0.04 3 %MoL+ 0.030.06 %Vanadium (V) up to 0.25 %above 0.25 %0.23 3 %VL+ 0.0040.06 %Tungsten (W) up to 0.10 %above 0.10 %0.08 3 %WL+ 0.020.02 %Copper (Cu) up to 0.15 %above 0.15 %0.18 3 %CuL+ 0.020.05 %Aluminum (Al) up to 0.03 %0.03 to 0.10 %, incl.above 0.10 %0.01 %0.083 % 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 ind
