1、Designation: A703/A703M 11 A703/A703M 12Standard 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 Department of Defense.1. Scope*1.1 This spec
3、ification2 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 for Fus
4、ion 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 Marten
5、sitic, 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 and N
6、ickel 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 specificatio
7、ns 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 shal
8、lprevail.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-confo
9、rmance 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 forH
10、igh-Temperature ServiceA351/A351M Specification for Castings, Austenitic, for Pressure-Containing Parts1 This specification is under the jurisdiction of ASTM Committee A01 on Steel, Stainless Steel and Related Alloys and is the direct responsibility of Subcommittee A01.18on Castings.Current edition
11、approved April 1, 2011May 1, 2012. Published May 2011July 2012. Originally approved in 1974. Last previous edition approved in 20082011 asA703/A703M 08a.A703/A703M 11. DOI: 10.1520/A0703_A0703M-11.10.1520/A0703_A0703M-12.2 For ASME Boiler and Pressure Vessel Code applications see related Specificati
12、on SA-703/SA-703M in Section II of that Code.3 For referenced ASTM standards, visit the ASTM website, www.astm.org, or contact ASTM Customer Service at serviceastm.org. For Annual Book of ASTM Standardsvolume information, refer to the standards Document Summary page on the ASTM website.This document
13、 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 appr
14、opriate. 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 Sta
15、tes1A352/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, Equ
16、ipment, 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, Qualifications o
17、f 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 Ferri
18、te 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, an
19、d 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 Sur
20、veys of Furnaces Used to Heat Treat Steel ProductsA995/A995M Specification for Castings, Austenitic-Ferritic (Duplex) Stainless Steel, for Pressure-Containing PartsE29 Practice for Using Significant Digits in Test Data to Determine Conformance with SpecificationsE94 Guide for Radiographic Examinatio
21、nE125 Reference Photographs for Magnetic Particle Indications on Ferrous CastingsE165 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 N
22、il-Ductility Transition Temperature of Ferritic SteelsE280 Reference Radiographs for Heavy-Walled (412 to 12-in. (114 to 305-mm) Steel CastingsE340 Test Method for Macroetching Metals and AlloysE446 Reference Radiographs for Steel Castings Up to 2 in. (50.8 mm) in ThicknessE709 Guide for Magnetic Pa
23、rticle Testing2.2 ANSI Standard:4B16.5 Pipe Flanges and Flanged Fittings2.3 Standards of the Manufacturers Standardization 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 Parti
24、cle Exam Method)MSS SP 54 Quality Standard for Steel Castings for Valves, Flanges, and Fittings and Other Piping Components (RadiographicExamination Method)3. Terminology3.1 Definitions:3.1.1 The definitions in Test Methods and Definitions A370 and Terminology A941 are applicable to this specificati
25、on and thoselisted in 1.1.3.1.2 chaplet, na chaplet 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 hea
26、t, nall the molten metal poured from a single furnace or all the molten metal from two or more furnaces poured intoa single ladle or casting prior to the replenishing of the furnace(s).3.1.5 internal chill, nan internal chill is a metallic device placed in a mold cavity to increase the rate of heat
27、removal at thatlocation.3.1.6 test coupon, nthe 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 Available from American National Standards Institute (ANSI), 25 W. 43rd St., 4th Floor, New York, NY 10036, http:/www.ansi
28、.org.5 Available from Manufacturers Standardization Society of the Valve and Fittings Industry (MSS), 127 Park St., NE, Vienna, VA 22180-4602, http:/www.mss-.A703/A703M 1224. Materials and Manufacture4.1 Melting ProcessThe steel shall be made by open-hearth or electric-furnace process, with or witho
29、ut separate refining suchas argon-oxygen-decarburization (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 en
30、hance mechanical properties.4.2.2 Castings 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 per
31、formed at not more than 25F 15C below nor 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
32、 furnace set point used.4.2.2.2 The maximum 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 b
33、e below the minimum specified temperature 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 eac
34、h heat shall be made by the manufacturer to 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 com
35、position thus determined shall be reportedto 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
36、.The analysis shall be made on representative material. Due to the possibility of decarburization, carbon and alloy steel samplesfor carbon analysis shall be taken no closer than 14 in. 6.4 mm to a cast surface except that castings too thin for this shall beanalyzed on representative material. The c
37、hemical composition thus determined shall meet the requirements specified in theapplicable specification for the grade involved, or shall be subject to rejection by the purchaser, except that the chemicalcomposition determined for carbon and low-alloy steel castings may vary from the specified limit
38、s by the amounts shown in Table1. The product analysis tolerances of Table 1 are not applicable as acceptance criteria for heat analysis by the casting manufacturer.5.4 Unspecified ElementsWhen chemical analysis for elements not specified for the grade ordered is desired, SupplementaryRequirement S1
39、 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 the supplied material such that the material conforms to the requirementsof a different grade.5.6 Where more
40、 than one ladle is poured into a single casting, the molten metal in each ladle must conform to the specifiedchemical requirements.6. Mechanical Test Methods6.1 All mechanical tests shall be conducted in accordance with Test Methods and Definitions A370.7. Tensile Requirements7.1 One tension test sh
41、all 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 type of mold as the castings.67.2 The coupon from which the te
42、st 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 Investment CastingsFor investment castings, the coupons may be cast
43、 to shape or machined from coupons to dimensionsin accordance with Test Methods and Definitions A370 or the ICI coupon shown in Fig. 1.6 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 b
44、efound in The Steel Castings Handbook, Fifth Edition, Steel Founders Society of America, 1980, pp. 15-35 through 15-43.A703/A703M 1237.5 Other CastingsUnless otherwise specified by the purchaser, test coupons may be cast integrally with the castings or asseparately in accordance with Fig. 2 and Tabl
45、e 2, with Fig. 3, or with Fig. 4, except when Supplementary Requirement S26 isspecified. The test coupon in Fig. 4 shall be employed only for austenitic alloy castings with cross sections less than 212 in. 63.5mm. Tension test specimens shall be prepared in accordance with Test Methods and Definitio
46、ns A370.7.6 If any specimen shows defective machining or develops flaws, it may be discarded and another substituted from the sameheat.7.7 To determine conformance with the tension test requirements, an observed value or calculated value shall be rounded offin accordance with Practice E29 to the nea
47、rest 500 psi 5 MPa for yield and tensile strength and to the nearest 1 % for elongationand reduction of area.8. Repair by Welding8.1 Repair by welding shall be in accordance with the requirements of individual specification using procedures and weldersqualified in accordance with Practice A488/A488M
48、.9. Flanges9.1 When a flange from a flanged casting is removed to make a weld end casting, discontinuities may be observed that wouldnot have been detrimental in a flanged casting. The disposition of the casting shall be subject to agreement between the purchaserand manufacturer.10. Quality10.1 The
49、surface of the casting shall be free of adhering sand, scale, cracks, and hot tears as determined by visual examination.Other surface discontinuities shall meet the visual acceptance standards specified in the order. Practice A802/A802M or otherTABLE 1 Product Analysis Tolerances for Carbon and Low-AlloySteelsElement RangeA TolerancesB,C over 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
