1、Designation: A703/A703M 12a A703/A703M 12b Standard Specication for Steel Castings, General Requirements, for Pressure- Containing Parts 1 This standard is issued under the xed designation A703/A703M; the number immediately following the designation indicates the year of original adoption or, in the
2、 case 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 T
3、his specication 2 covers a group of common requirements that, unless otherwise specied in an individual specication, shall apply to steel castings for pressure-containing parts under each of the following ASTM specications: Title of Specication ASTM Designation Steel Castings, Carbon, Suitable for F
4、usion Welding, A216/A216M for High-Temperature Service Steel Castings, Martensitic Stainless and Alloy, for A217/A217M Pressure-Containing Parts, Suitable for High- Temperature Service Castings, Austenitic, Austenitic-Ferritic (Duplex), A351/A351M Pressure-Containing Parts Steel Castings, Ferritic a
5、nd Martensitic, for Pressure- A352/A352M Containing Parts, Suitable for Low-Temperature Service Steel Castings, Alloy, Specially Heat-Treated, for A389/A389M Pressure-Containing Parts, Suitable for High- Temperature Service Steel Castings Suitable for Pressure Service A487/A487M Castings, Iron-Nicke
6、l-Chromium and Nickel Alloys, Specially Controlled for Pressure Retaining Parts for Corrosive Service A990 Castings, Austenitic-Ferritic (Duplex) Stainless Steel, for Pressure-Containing Parts A995/A995M 1.2 This specication also covers a group of supplementary requirements which may be applied to t
7、he above specications as indicated therein. These are provided for use when additional testing or inspection is desired and apply only when specied individually by the purchaser in the order. 1.3 In case of conict between the requirements of the individual specication and this general specication, t
8、he former shall prevail. 1.4 The values stated in either SI units or inch-pound units are to be regarded separately as standard. The values stated in each system may not be exact equivalents; therefore, each system shall be used independently of the other. Combining values from the two systems may r
9、esult in non-conformance with the standard. 2. Referenced Documents 2.1 ASTM Standards: 3 A216/A216M Specication for Steel Castings, Carbon, Suitable for Fusion Welding, for High-Temperature Service A217/A217M Specication for Steel Castings, Martensitic Stainless and Alloy, for Pressure-Containing P
10、arts, Suitable for High-Temperature Service A351/A351M Specication for Castings, Austenitic, for Pressure-Containing Parts 1 This specication is under the jurisdiction of ASTM Committee A01 on Steel, Stainless Steel and Related Alloys and is the direct responsibility of Subcommittee A01.18 on Castin
11、gs. Current edition approved Sept. 1, 2012Nov. 1, 2012. Published October 2012November 2012. Originally approved in 1974. Last previous edition approved in 2012 as A703/A703M 12.A703/A703M 12a. DOI: 10.1520/A0703_A0703M-12A.10.1520/A0703_A0703M-12B. 2 For ASME Boiler and Pressure Vessel Code applica
12、tions see related Specication 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 Standards volume information, refer to the standards Document Summary page on t
13、he ASTM website. This document 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. Because it may not be technically possible to adequately depict all changes accurately, ASTM recommends that users
14、 consult prior editions as appropriate. In all cases only the current version of the standard as published by ASTM is to be considered the official document. *A Summary of Changes section appears at the end of this standard Copyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Consh
15、ohocken, PA 19428-2959. United States 1A352/A352M Specication for Steel Castings, Ferritic and Martensitic, for Pressure-Containing Parts, Suitable for Low- Temperature Service A370 Test Methods and Denitions for Mechanical Testing of Steel Products A380 Practice for Cleaning, Descaling, and Passiva
16、tion of Stainless Steel Parts, Equipment, and Systems A389/A389M Specication for Steel Castings, Alloy, Specially Heat-Treated, for Pressure-Containing Parts, Suitable for High-Temperature Service A487/A487M Specication for Steel Castings Suitable for Pressure Service A488/A488M Practice for Steel C
17、astings, Welding, Qualications of Procedures and Personnel A609/A609M Practice for Castings, Carbon, Low-Alloy, and Martensitic Stainless Steel, Ultrasonic Examination Thereof A751 Test Methods, Practices, and Terminology for Chemical Analysis of Steel Products A800/A800M Practice for Steel Casting,
18、 Austenitic Alloy, Estimating Ferrite Content Thereof A802/A802M Practice for Steel Castings, Surface Acceptance Standards, Visual Examination A903/A903M Specication for Steel Castings, Surface Acceptance Standards, Magnetic Particle and Liquid Penetrant Inspection A941 Terminology Relating to Steel
19、, Stainless Steel, Related Alloys, and Ferroalloys A967 Specication for Chemical Passivation Treatments for Stainless Steel Parts A990 Specication for Castings, Iron-Nickel-Chromium and Nickel Alloys, Specially Controlled for Pressure Retaining Parts for Corrosive Service A991/A991M Test Method for
20、Conducting Temperature Uniformity Surveys of Furnaces Used to Heat Treat Steel Products A995/A995M Specication for Castings, Austenitic-Ferritic (Duplex) Stainless Steel, for Pressure-Containing Parts E29 Practice for Using Signicant Digits in Test Data to Determine Conformance with Specications E94
21、 Guide for Radiographic Examination E125 Reference Photographs for Magnetic Particle Indications on Ferrous Castings E165 Practice for Liquid Penetrant Examination for General Industry E186 Reference Radiographs for Heavy-Walled (2 to 4 1 2-in. (50.8 to 114-mm) Steel Castings E208 Test Method for Co
22、nducting Drop-Weight Test to Determine Nil-Ductility Transition Temperature of Ferritic Steels E280 Reference Radiographs for Heavy-Walled (4 1 2 to 12-in. (114 to 305-mm) Steel Castings E340 Test Method for Macroetching Metals and Alloys E353 Test Methods for Chemical Analysis of Stainless, Heat-Re
23、sisting, Maraging, and Other Similar Chromium-Nickel-Iron Alloys E354 Test Methods for Chemical Analysis of High-Temperature, Electrical, Magnetic, and Other Similar Iron, Nickel, and Cobalt Alloys E446 Reference Radiographs for Steel Castings Up to 2 in. (50.8 mm) in Thickness E709 Guide for Magnet
24、ic Particle Testing 2.2 ANSI Standard: 4 B16.5 Pipe Flanges and Flanged Fittings 2.3 Standards of the Manufacturers Standardization Society of the Valve and Fitting Industry: 5 MSS SP 53 Quality Standard for Steel Castings and Forgings for Valves, Flanges and Fittings and Other Piping Components (Ma
25、gnetic Particle Exam Method) MSS SP 54 Quality Standard for Steel Castings for Valves, Flanges, and Fittings and Other Piping Components (Radiographic Examination Method) 3. Terminology 3.1 Denitions: 3.1.1 The denitions in Test Methods and Denitions A370 and Terminology A941 are applicable to this
26、specication and those listed 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 format such as ANSI ASC
27、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 into a 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 t
28、he rate of heat removal at that location. 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 Park St., NE, Vienna, V A 2
29、2180-4602, http:/www.mss-. A703/A703M 12b 23.1.6 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 Manufacture 4.1 Melting ProcessThe steel shall be made by open-hearth or electric-furn
30、ace process, with or without separate rening such as argon-oxygen-decarburization (AOD), unless otherwise designated by the individual specication. 4.2 Heat Treatment: 4.2.1 Ferritic and martensitic steel shall be cooled after pouring to provide substantially complete transformation of austenite pri
31、or 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 Method A991/A991M. 4.2.2.1 When castings are heat treated at temperatures above 2000F 1100C, then the working zone shall have be
32、en established by a survey performed at not more than 25F 15C below nor more than 200F 110C above the minimum heat treatment temperature specied for the grade. If a minimum heat treatment temperature is not specied for the grade, then the survey temperature shall be not more than 50F 30C below nor m
33、ore 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 and the lowest temperature shall be as agreed between the purchaser and producer except that during production heat treatment, no
34、 portion of the furnace shall be below the minimum specied temperature nor above the maximum specied temperature for the grade being processed. 5. Chemical Composition 5.1 Chemical AnalysisChemical analysis of materials covered by this specication shall be in accordance with Test Methods A751. 5.2 H
35、eat AnalysisAn analysis of each heat shall be made by the manufacturer to determine the percentages of the elements specied. 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 1 4 in. 6.4 mm beneat
36、h the surface. The chemical composition thus determined shall be reported to the purchaser, or his representative, and shall conform to the requirements in the individual specication for the grade being poured. 5.3 Product AnalysisA product analysis may be made by the purchaser from material represe
37、nting each heat, lot, or casting. The analysis shall be made on representative material. Due to the possibility of decarburization, carbon and alloy steel samples for carbon analysis shall be taken no closer than 1 4 in. 6.4 mm to a cast surface except that castings too thin for this shall be analyz
38、ed on representative material. The chemical composition thus determined shall meet the requirements specied in the applicable specication for the grade involved, or shall be subject to rejection by the purchaser, except that the chemical composition determined for carbon and low-alloy steel and stai
39、nless steel castings may vary from the specied limits by the amounts shown in Table 1. and Table 2 respectively. The product analysis tolerances of Table 1 and Table 2 are not applicable as acceptance criteria for heat analysis by the casting manufacturer. When comparing product and heat analysis fo
40、r other than carbon and low alloy steels and stainless steels, the reproducibility Data R 2 , in Test Methods E353 or E354, as applicable, shall be taken into consideration. 5.4 Unspecied ElementsWhen chemical analysis for elements not specied for the grade ordered is desired, Supplementary Requirem
41、ent S1 may be specied. 5.5 Grade substitutionGrade substitution is not permitted. Grade substitution occurs when the material being supplied contains one or more elements that are not specied for the supplied material such that the material conforms to the requirements of a different grade. 5.6 Wher
42、e more than one ladle is poured into a single casting, the molten metal in each ladle must conform to the specied chemical requirements. 6. Mechanical Test Methods 6.1 All mechanical tests shall be conducted in accordance with Test Methods and Denitions A370. 7. Tensile Requirements 7.1 One tension
43、test shall be made from each heat, and shall conform to the tensile requirements specied. Test coupons shall be cast from the same heat as the castings represented, except that for investment castings, the test coupons shall be cast in the same type of mold as the castings. 6 6 Information on the re
44、lationship of mechanical properties determined on test coupons obtained as specied in 7.1 and 7.4 with those obtained from the casting may be found in The Steel Castings Handbook, Fifth Edition, Steel Founders Society of America, 1980 , pp. 15-35through 15-43. A703/A703M 12b 37.2 The coupon from whi
45、ch the test specimen is taken shall be heat treated in production furnaces to the same procedure as the castings 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
46、 may be cast to shape or machined from coupons to dimensions in accordance with Test Methods and Denitions A370 or the ICI coupon shown in Fig. 1. 7.5 Other CastingsUnless otherwise specied by the purchaser, test coupons may be cast integrally with the castings or as separately in accordance with Fi
47、g. 2 and Table 23, with Fig. 3, or with Fig. 4, except when Supplementary Requirement S26 is specied. The test coupon in Fig. 4 shall be employed only for austenitic alloy castings with cross sections less than 2 1 2 in. 63.5 mm. Tension test specimens shall be prepared in accordance with Test Metho
48、ds and Denitions A370. 7.6 If any specimen shows defective machining or develops aws, it may be discarded and another substituted from the same heat. 7.7 To determine conformance with the tension test requirements, an observed value or calculated value shall be rounded off in accordance with Practic
49、e E29 to the nearest 500 psi 5 MPa for yield and tensile strength and to the nearest 1 % for elongation and reduction of area. 8. Repair by Welding 8.1 Repair by welding shall be in accordance with the requirements of individual specication using procedures and welders qualied in accordance with Practice A488/A488M. TABLE 1 Product Analysis Tolerances for Carbon and Low-Alloy Steels Element Range A Tolerances B,C over max or under min, Limit, % Carbon (C) up
