1、Designation: A703/A703M 12bA703/A703M 13Standard 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 ofASTM Committee A01 on Steel, Stainless Steel and RelatedAlloys and is the direct responsibility of Subcommittee A01.18on Castings.Current edition ap
11、proved Nov. 1, 2012May 1, 2013. Published November 2012May 2013. Originally approved in 1974. Last previous edition approved in 2012 asA703/A703M 12a.A703/A703M 12b. DOI: 10.1520/A0703_A0703M-12B.10.1520/A0703_A0703M-13.2 For ASME Boiler and Pressure Vessel Code applications see related Specificatio
12、n SA-703/SA-703M in Section II of that Code.3 For referencedASTM standards, visit theASTM website, www.astm.org, or contactASTM 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 is
13、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 appropri
14、ate. 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 States1
15、A352/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, Equipme
16、nt, 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 of Pr
17、ocedures 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 Ferrite C
18、ontent 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, and Fe
19、rroalloysA967 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 Surveys
20、 of Furnaces Used to Heat Treat Steel ProductsA995/A995M Specification for Castings, Austenitic-Ferritic (Duplex) Stainless Steel, for Pressure-Containing PartsA1080 Practice for Hot Isostatic Pressing of Steel, Stainless Steel, and Related Alloy CastingsE29 Practice for Using Significant Digits in
21、Test Data to Determine Conformance with SpecificationsE94 Guide for Radiographic ExaminationE125 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
22、.8 to 114-mm) Steel CastingsE208 Test Method for Conducting Drop-Weight Test to Determine Nil-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 AlloysE353 Test Metho
23、ds for Chemical Analysis of Stainless, Heat-Resisting, Maraging, and Other Similar Chromium-Nickel-IronAlloysE354 Test Methods for Chemical Analysis of High-Temperature, Electrical, Magnetic, and Other Similar Iron, Nickel, andCobalt AlloysE446 Reference Radiographs for Steel Castings Up to 2 in. (5
24、0.8 mm) in ThicknessE709 Guide for Magnetic Particle Testing2.2 ANSI Standard:4B16.5 Pipe Flanges and Flanged Fittings2.3 Standards of the Manufacturers Standardization Society of the Valve and Fitting Industry:5MSS SP 53 Quality Standard for Steel Castings and Forgings for Valves, Flanges and Fitti
25、ngs and Other Piping Components(Magnetic Particle 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 Termi
26、nology A941 are applicable to this specification 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
27、 standard formatsuch as ANSI ASC X12.3.1.4 heat, 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
28、in a mold cavity to increase the rate of heat removal at thatlocation.4 Available from American National Standards Institute (ANSI), 25 W. 43rd St., 4th Floor, New York, NY 10036, http:/www.ansi.org.5 Available from Manufacturers Standardization Society of the Valve and Fittings Industry (MSS), 127
29、Park St., NE, Vienna, VA 22180-4602, http:/www.mss-.A703/A703M 1323.1.6 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. Materials and Manufacture4.1 Melting ProcessThe steel shall be made by open-hea
30、rth or electric-furnace process, with or without 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 transforma
31、tion of austeniteprior to heat treatment to enhance 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 z
32、one shall have beenestablished by a survey performed 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 5
33、0F 30C below nor more than 175F 100C above the 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 he
34、at treatment, noportion of the furnace shall be 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 M
35、ethodsA751.5.2 Heat AnalysisAn analysis of each 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
36、. 6.4 mm beneath the surface. The chemical composition 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 ma
37、terial representing each heat, lot, or casting.The analysis shall be made on representative material. Due to the possibility of decarburization, samples for carbon analysis shallbe taken no closer than 14 in. 6.4 mm to a cast surface except that castings too thin for this shall be analyzed on repres
38、entativematerial. The chemical composition thus determined shall meet the requirements specified in the applicable specification for thegrade involved, or shall be subject to rejection by the purchaser, except that the chemical composition determined for carbon andlow-alloy steel and stainless steel
39、 castings may vary from the specified limits by the amounts shown in Table 1 and Table 2respectively. The product analysis tolerances of Table 1 and Table 2 are not applicable as acceptance criteria for heat analysis bythe casting manufacturer. When comparing product and heat analysis for other than
40、 carbon and low alloy steels and stainless steels,the reproducibility Data R2, in Test Methods E353 or E354, as applicable, shall be taken into consideration.5.4 Unspecified ElementsWhen chemical analysis for elements not specified for the grade ordered is desired, SupplementaryRequirement S1 may be
41、 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 than o
42、ne 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 shall be
43、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.66 Information on the relationship of me
44、chanical properties determined on test coupons obtained as specified in 7.1 and 7.4 with those obtained from the casting may befound in The Steel Castings Handbook, Fifth Edition, Steel Founders Society of America, 1980 , pp. 15-35through 15-43.A703/A703M 1337.2 The coupon from which the test specim
45、en 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 to shape
46、 or machined from coupons to dimensionsin accordance with Test Methods and Definitions A370 or the ICI coupon shown in Fig. 1.7.5 Other CastingsUnless otherwise specified by the purchaser, test coupons may be cast integrally with the castings or asseparately in accordance with Fig. 2 and Table 3, wi
47、th 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 Definitions A370
48、.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 nearest 50
49、0 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.TABLE 1 Product Analysis Tolerances 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 +
