1、Designation: A 703/A 703M 07Standard 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 revisi
2、on, the year of last revision. A number in parentheses indicates the year of last reapproval.A superscript epsilon (e) 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 inch-pound units or SI unitsare to be regarded separately as standard. Within the text, theSI units are shown in brackets. The values stated in eachsystem are not exact equivalents; therefore, each system mustbe used independently of the other. Combining
9、 values from thetwo systems may result in nonconformance with the specifi-cation. Inch-pound units are applicable for material ordered toSpecification A 703 and SI units for material ordered toSpecification A 703M.2. Referenced Documents2.1 ASTM Standards:3A 216/A 216M Specification for Steel Castin
10、gs, 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-able for High-Temperature ServiceA 351/A 351M Specification for Castings, Austenitic, forPressure-Containing PartsA
11、352/A 352M Specification for Steel Castings, Ferritic andMartensitic, for Pressure-Containing Parts, Suitable forLow-Temperature ServiceA 370 Test Methods and Definitions for Mechanical Testingof Steel ProductsA 380 Practice for Cleaning, Descaling, and Passivation ofStainless Steel Parts, Equipment
12、, 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 for Steel Castings Suitable forPressure ServiceA 488/A 488M Practice for Steel Castings, Welding, Quali-fication
13、s of Procedures and PersonnelA 609/A 609M Practice for Castings, Carbon, Low-Alloy,and Martensitic Stainless Steel, Ultrasonic ExaminationThereofA 751 Test Methods, Practices, and Terminology forChemical Analysis of Steel ProductsA 800/A 800M Practice for Steel Casting, Austenitic Alloy,1This specif
14、ication 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 approved March 1, 2007. Published March 2007. Originallyapproved in 1974. Last previous edition approved in 2006 as A
15、 703/A 703M 06.2For ASME Boiler and Pressure Vessel Code applications see related Specifi-cation SA-703/SA-703M in Section II of that Code.3For referenced ASTM standards, visit the ASTM website, www.astm.org, orcontact ASTM Customer Service at serviceastm.org. For Annual Book of ASTMStandards volume
16、 information, refer to the standards Document Summary page onthe ASTM website.1*A Summary of Changes section appears at the end of this standard.Copyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.Estimating Ferrite Content ThereofA 802/A
17、 802M Practice for Steel Castings, Surface Accep-tance Standards, Visual ExaminationA 903/A 903M Specification for Steel Castings, SurfaceAcceptance Standards, Magnetic Particle and Liquid Pen-etrant InspectionA 941 Terminology Relating to Steel, Stainless Steel, Re-lated Alloys, and FerroalloysA 96
18、7 Specification for Chemical Passivation Treatmentsfor Stainless Steel PartsA 990 Specification for Castings, Iron-Nickel-Chromiumand Nickel Alloys, Specially Controlled for PressureRetaining Parts for Corrosive ServiceA 991/A 991M Test Method for Conducting TemperatureUniformity Surveys of Furnaces
19、 Used to Heat Treat SteelProductsA 995/A 995M Specification for Castings, Austenitic-Ferritic (Duplex) Stainless Steel, for Pressure-ContainingPartsE29 Practice for Using Significant Digits in Test Data toDetermine Conformance with SpecificationsE94 Guide for Radiographic ExaminationE 125 Reference
20、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-mm) Steel CastingsE 208 Test Method for Conducting Drop-Weight Test toDetermine Nil-Ductility Transition Temperatu
21、re 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 Radiographs for Steel Castings Up to 2 in.51 mm in ThicknessE 709 Guide for Magnetic Particle Examination2.2 ANSI Standard
22、: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 for Valves,Flanges and Fittings, and Other Piping Components (DryPowder Magnetic Particle Inspection Method)MSS
23、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 in Test Methods and Definitions A 370and Terminology A 941 are applicable to this specification andthose listed
24、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 business information in a standardformat such as ANSI ASC X12.3.1.4 heat, nall the molten me
25、tal 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 metallic deviceplaced in a mold cavity to increase the rate of heat removal atthat location.
26、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 be made by open-hearth or electric-furnace process, with or without separaterefining su
27、ch 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 complete transformation ofaustenite prior to heat treatment to enhance mechanical prop-er
28、ties.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 temperaturesabove 2000F 1100C, then the working zone shall have beenestablished by a survey performed at not more than
29、 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 survey temperature shall be not more than 50F30C below nor more than 175F 100C above the furnaceset point used.4
30、.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 during production heattreatment, no portion of the furnace shall be below theminimum specifie
31、d 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 accordance with TestMethods A 751.5.2 Heat AnalysisAn analysis of each heat shall be madeby the m
32、anufacturer 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 less than14 in. 6.4mm beneath the surface. The chemical composition thus4Available from Ame
33、rican 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-.A 703/A 703M 072determined shall be repor
34、ted 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 made bythe purchaser from material representing each heat, lot, orcasting. The analysis shall be made on represe
35、ntative 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 castings too thin for thisshall be analyzed on representative material. The chemicalcomposition thus determined shall
36、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 carbon and low-alloysteel castings may vary from the specified limits by theamounts shown in Table 1. The produc
37、t 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 specified for the grade ordered is desired, Supple-mentary Requirement S1 may be specified.5.4.1 Grade substitution
38、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 ordered grade, and (2) the amount ofthat element equals or exceeds the minimum requirement forthe element in ano
39、ther 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 within the scope of this section.5.5 The substitution of a grade or composition differentfrom that specified by the p
40、urchaser 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 Methods6.1 All mechanical tests shall be conducted in accordancewith Test Methods and Definitions A 370.7. Tensile
41、 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,except that for investment castings, the test coupons shall becast in the same type of mold as the castings
42、.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 heat-treated castings, atthe producers option, instead of from test coupons.7.4 Investment CastingsFor investment c
43、astings, 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 CastingsUnless otherwise specified by thepurchaser, test coupons may be cast integrally with the castingsor as separately
44、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 alloy castings with cross sectionsless than 212 in. 63.5 mm. Tension test specimens shall beprepared in accordanc
45、e 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 conformance with the tension test require-ments, an observed value or calculated value shall be roundedoff in accord
46、ance 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 be in accordance with therequirements of individual specification using procedures andwelders qualified in accor
47、dance 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 castingmay be found in The Steel Castings Handbook , Fifth Edition, Steel FoundersSociety of America, 1980, pp. 15-35
48、 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+ 0.020.04 %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.
49、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 %Molybdenum (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 denote
