ASTM A351– A351M–00 英文版

Designation: A 351/A 351M – 00 Used in USDOE-NE Standards Standard Specification for Castings, Austenitic, Austenitic-Ferritic (Duplex), for Pressure-Containing Parts1 This standard is issued under the fixed designation A 351/A 351M; the number immediately following the designation indicates the year of original adoption or, in the case of revision, 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 covers austenitic and austenitic- ferritic (duplex) steel castings for valves, flanges, fittings, and other pressure-containing parts (Note 1). NOTE 1—Carbon steel castings for pressure-containing parts are cov- ered by Specification A 216/A 216M, and low-alloy steel castings by Specification A 217/A 217M. 1.2 A number of grades of austenitic and austenitic-ferritic steel castings are included in this specification. Since these grades possess varying degrees of suitability for service at high temperatures or in corrosive environments, it is the responsi- bility of the purchaser to determine which grade shall be furnished. Selection will depend on design and service condi- tions, mechanical properties, and high-temperature or corrosion-resistant characteristics, or both. 1.2.1 Because of thermal instability, Grades CE20N, CF3A, CF3MA, and CF8A are not recommended for service at temperatures above 800°F [425°C]. 1.2.2 Because of embrittlement phases, Grade CD4MCu is not recommended for service at temperatures above 600°F [316°C]. 1.3 The values stated in either inch-pound units or SI units are to be regarded separately as standard. Within the text, the SI units are shown in brackets. The values stated in each system are not exact equivalents; therefore, each system must be used independently of the other. Combining values from the two systems may result in nonconformance with the specifi- cation. 2. Referenced Documents 2.1 ASTM Standards: A 216/A 216M Specification for Steel Castings, Carbon, Suitable for Fusion Welding, for High-Temperature Ser- vice3 A 217/A 217M Specification for Steel Castings, Martensi- tic Stainless and Alloy, for Pressure-Containing Parts, Suitable for High-Temperature Service3 A 488/A 488M Practice for Steel Castings, Welding, Quali- fication of Procedures and Personnel3 A 703/A 703M Specification for Steel Castings, General Requirements, for Pressure-Containing Parts3 E 165 Test Method for Liquid Penetrant Examination4 E 709 Guide for Magnetic Particle Examination4 2.2 Manufacturers Standardization Society of the Valve and Fittings Industry Standard: SP-55 Quality Standard for Steel Castings for Valves, Flanges, and Fittings and Other Components (Visual Method)5 3. General Conditions for Delivery 3.1 Material furnished to this specification shall conform to the requirements of Specification A 703/A 703M, including any supplementary requirements that are indicated in the purchase order. Failure to comply with the general require- ments of Specification A 703/A 703M constitutes nonconfor- mance with this specification. In case of conflict between the requirements of this specification and Specification A 703/ A 703M, this specification shall prevail. 3.2 The post weld heat treatment requirements of Supple- mentary Requirement S11 may be specified when austenitic castings other than HK, HT, or CT15C are to be subjected to severe corrosive service. 1 This specification is under the jurisdiction of ASTM Committee A01 on Steel, Stainless Steel, and Related Alloys and is the direct responsibility of Subcommittee A01.18 on Castings. Current edition approved Sept. 10, 2000. Published October 2000. Originally published as A 351 – 52 T. Last previous edition A 351/A 351M-94a (1999). 2 For ASME Boiler and Pressure Vessel Code applications, see related Specifi- cation SA-351/SA-351M in Section II of that code. 3 Annual Book of ASTM Standards, Vol 01.02. 4 Annual Book of ASTM Standards, Vol 03.03. 5 Available from Manufacturers’ Standardization Society of the Valve and Fittings Industry, 1815 N. Fort Myer Drive, Arlington, VA 22209. 1 Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States. NOTICE: This standard has either been superceded and replaced by a new version or discontinued. Contact ASTM International (www.astm.org) for the latest information. 4. Ordering Information 4.1 The inquiry and order should include or indicate the following: 4.1.1 A description of the casting by pattern number or drawing (dimensional tolerances shall be included on the casting drawing), 4.1.2 Grade of steel, 4.1.3 Options in the specification, and 4.1.4 Supplementary requirements desired, including the standards of acceptance. 5. Process 5.1 The steel shall be made by the electric furnace process with or without separate refining such as argon-oxygen decar- burization (AOD). 6. Heat Treatment 6.1 All castings shall receive a heat treatment at the tem- perature specified in Table 1, followed by a quench in water or rapid cool by other means except as noted. NOTE 2—Proper heat treatment of these alloys is usually necessary to enhance corrosion resistance and in some cases to meet mechanical properties. Minimum heat-treat temperatures are specified; however, it is sometimes necessary to heat-treat at higher temperatures, hold for some minimum time at temperature and then rapidly cool the castings in order to enhance the corrosion resistance and meet mechanical properties. 7. Chemical Composition 7.1 The steel shall conform to the requirements as to chemical composition prescribed in Table 2. 8. Tensile Properties 8.1 Steel used for the castings shall conform to the require- ments as to tensile properties prescribed in Table 3. 9. Quality 9.1 The surface of the casting shall be examined visually and shall be free of adhering sand, scale, cracks, and hot tears. Other surface discontinuities shall meet the visual acceptance standards specified in the order. Visual Method SP 55 or other visual standards may be used to define acceptable surface discontinuities and finish. Unacceptable visual surface discon- tinuities shall be removed and their removal verified by visual examination of the resultant cavities. 9.2 When additional inspection is desired, Supplementary Requirements S5, S6, and S10 may be ordered. 9.3 The castings shall not be peened, plugged, or impreg- nated to stop leaks. 10. Repair by Welding 10.1 Repairs shall be made using procedures and welders qualified under Practice A 488/A 488M. 10.2 Weld repairs shall be inspected to the same quality standards that are used to inspect the castings. When castings are produced with Supplementary Requirement S5 specified, weld repairs on castings that have leaked on hydrostatic test, or on castings in which the depth of any cavity prepared for repair welding exceeds 20 % of the wall thickness or 1 in. [25 mm], whichever is smaller, or on castings in which any cavity prepared for welding is greater than approximately 10 in.2[65 cm2], shall be radiographed to the same standards that are used to inspect the castings. When castings are produced with Supplementary Requirement S6 specified, weld repairs shall be inspected by liquid penetrant examination to the same stan- dards that are used to inspect the castings. NOTE 3—When austenitic steel castings are to be used in services where they will be subject to stress corrosion, the purchaser should so indicate in his order and such castings should be solution-heat treated following all weld repairs. 11. Keywords 11.1 austenitic stainless steel; duplex stainless steel; pres- sure containing parts; stainless steel; steel castings TABLE 1 Heat-Treatment Requirements Grade Temperature, min °F °C HK30, HK40, HT30, CT15C as-cast as-cast CF3, CF3A, CF8, CF8A, CF3M, CF3MA, CF8M, CF3MN, CG3M, CF10, CF10M, CG8M, CD4MCu 1900 1040 CF10SMnN, CF8C, CF10MC 1950 1065 CD3MWCuN 2010 1100 CN7M, CG6MMN, CE8MN 2050 1120 CK3MCuN, CN3MN, CH8, CH10, CH20, CK20 2100 1150 CE20NA 2225 1220 AGrade shall be quenched in water or the castings may be furnace cooled to 2050°F [1120°C] minimum, held for 15 min minimum and then quenched in water or rapidly cooled by other means. A 351/A 351M – 00 2 NOTICE: This standard has either been superceded and replaced by a new version or discontinued. Contact ASTM International (www.astm.org) for the latest information. TABLE 2 Chemical Requirements NOTE 1—Tungsten is a new element for Table 2. Element, % (max, ex- cept where range is given) CF3, CF3A CF8, CF8A CF3M, CF- 3MA CF8M CF3MN CF8C CF10 CF- 10M (J92- 901) CH8 CH10 CH20 CK20 HK30 HK40 HT30 CF-10MC CN7M CN- 3MN CD- 4MCu CE8MN CG- 6MMN CG8M CF10S- MnN CT15C CK- 3MCuN CE20N CG-3M (J92- 999) CD3M- WCuNA Carbon 0.03 0.08 0.03 0.08 0.03 0.08 0.04– 0.04– 0.08 0.04– 0.04– 0.04– 0.25– 0.35– 0.25– 0.10 0.07 0.03 0.04 0.08 0.06 0.08 0.10 0.05– 0.025 0.20 0.03 0.03 0.10 0.10 0.10 0.20 0.20 0.35 0.45 0.35 max 0.15 Manganese 1.50 1.50 1.50 1.50 1.50 1.50 1.50 1.50 1.50 1.50 1.50 1.50 1.50 1.50 2.00 1.50 1.50 2.00 1.00 1.00 4.00– 1.50 7.00– 0.15– 1.20 1.50 1.50 1.00 max 6.00 9.00 1.50 Silicon 2.00 2.00 1.50 1.50 1.50 2.00 2.00 1.50 1.50 2.00 2.00 1.75 1.75 1.75 2.50 1.50 1.50 1.00 1.00 1.50 1.00 1.50 3.50– 0.50– 1.00 1.50 1.50 1.00 max 4.50 1.50 Sulfur 0.040 0.040 0.040 0.040 0.040 0.040 0.040 0.040 0.040 0.040 0.040 0.040 0.040 0.040 0.040 0.040 0.040 0.010 0.04 0.040 0.030 0.04 0.030 0.03 0.010 0.040 0.04 0.025 max Phosphorus 0.040 0.040 0.040 0.040 0.040 0.040 0.040 0.040 0.040 0.040 0.040 0.040 0.040 0.040 0.040 0.040 0.040 0.040 0.04 0.040 0.040 0.04 0.060 0.03 0.045 0.040 0.04 0.030 max Chromium 17.0– 18.0– 17.0– 18.0– 17.0– 18.0– 18.0– 18.0– 22.0– 22.0– 22.0– 23.0– 23.0– 23.0– 13.0– 15.0– 19.0– 20.0– 24.5– 22.5– 20.50– 18.0– 16.0– 19.0– 19.5– 23.0– 18.0– 24.0– 21.0 21.0 21.0 21.0 21.0 21.0 21.0 21.0 26.0 26.0 26.0 27.0 27.0 27.0 17.0 18.0 22.0 22.0 26.5 25.5 23.50 21.0 18.0 21.0 20.5 26.0 21.0 26.0 Nickel 8.0– 12.0 8.0– 11.0 9.0– 13.0 9.0– 12.0 9.0– 13.0 9.0– 12.0 8.0– 11.0 9.0– 12.0 12.0– 15.0 12.0– 15.0 12.0– 15.0 19.0– 22.0 19.0– 22.0 19.0– 22.0 33.0– 37.0 13.0– 16.0 27.5– 30.5 23.5– 25.5 4.75– 6.00 8.0– 11.0 11.50– 13.50 9.0– 13.0 8.0– 9.0 31.0– 34.0 17.5– 19.5 8.0– 11.0 9.0– 13.0 6.5– 8.5 Molybde- 0.50 0.50 2.0– 2.0– 2.0– 0.50 0.50 2.0– 0.50 0.50 0.50 0.50 0.50 0.50 0.50 1.75– 2.0– 6.0– 1.75– 3.0– 1.50– 3.0– . . . . . . 6.0– 0.50 3.0– 3.0– num 3.0 3.0 3.0 3.0 2.25 3.0 7.0 2.25 4.5 3.00 4.0 7.0 4.0 4.0 Columbium . . . . . . . . . . . . . . . B . . . . . . . . . . . . . . . . . . . . . . . . . . . C . . . . . . . . . . . . 0.10– . . . . . . 0.50– . . . . . . . . . . . . (niobium) 0.30 1.50 Vanadium . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0.10– . . . . . . . . . . . . . . . . . . . . . 0.30 Nitrogen . . . . . . . . . . . . 0.10– . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0.18– . . . 0.10– 0.20– . . . 0.08– . . . 0.18– 0.08– . . . 0.20– 0.20 0.26 0.30 0.40 0.18 0.24 0.20 0.30 Copper . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3.0– 4.0 0.75 max 2.75– 3.25 . . . . . . . . . . . . . . . 0.50– 1.00 . . . . . . 0.5– 1.0 Tungsten . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0.5– 1.0 Iron . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Bal . . . . . . A % Cr + 3.3 % Mo + 16 % N $ 40. B Grade CF8C shall have a columbium content of not less than 8 times the carbon content but not over 1.00 %. C Grade CF10MC shall have a columbium content of not less than 10 times the carbon content but not over 1.20 %. A 351/A 351M – 00 3 NOTICE: This standard has either been superceded and replaced by a new version or discontinued. Contact ASTM International (www.astm.org) for the latest information. TA B LE 3 Te n si le R eq ui re m en ts CF 3 CF - 3A CF 8 CF - 8A CF - 3M CF - 3M A CF - 8M CF - 3M N CF - 8C CF 10 CF - 10 M (J9 2- 90 1) CH 8 CH 10 CH 20 CK 20 H K3 0 H K4 0 H T3 0 CF - 10 M C CN - 7M CN - 3M N CD - 4M Cu CE - 8M N CG 6M - M N CG - 8M CF 10 S- M nN CT - 15 C CK - 3M - Cu N CE 20 N CG - 3M (J9 2- 99 9) CD 3M - W Cu N Te n si le st re ng th ,7 0 77 70 77 70 80 70 75 70 70 70 65 70 70 65 65 62 65 70 62 80 10 0 95 85 75 85 63 80 80 75 10 0 m in ,k si [M Pa ] [48 5] [53 0] [48 5] [53 0] [48 5] [55 0] [48 5] [51 5] [48 5] [48 5] [48 5] [45 0] [48 5] [48 5] [45 0] [45 0] [42 5] [45 0] [48 5] [42 5] [55 0] [69 0] [65 5] [58 5] [51 5] [58 5] [43 5] [55 0] [55 0] [51 5] (70 0) Yi el d st re ng th ,A 30 35 30 35 30 37 30 37 30 30 30 28 30 30 28 35 35 28 30 25 38 70 65 42 .5 35 42 .5 25 38 40 35 65 m in ,k si [M Pa ] [20 5] [24 0] [20 5] [24 0] [20 5] [25 5] [20 5] [25 5] [20 5] [20 5] [20 5] [19 5] [20 5] [20 5] [19 5] [24 0] [24 0] [19 5] [20 5] [17 0] [26 0] [48 5] [45 0] [29 5] [24 0] [29 5] [17 0] [26 0] [27 5] [24 0] (45 0) El on ga tio n in 2 in .o r 50 m m ,B m in ,% 35 .0 35 .0 35 .0 35 .0 30 .0 30 .0 30 .0 35 .0 30 .0 35 .0 30 .0 30 .0 30 .0 30 .0 30 .0 10 .0 10 .0 15 .0 20 .0 35 .0 35 16 .0 25 .0 30 .0 25 .0 30 .0 20 .0 35 30 .0 25 25 .0 R ed uc tio n o f a re a , m in ,% . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A D et er m in e by th e 0. 2 % o ffs et m e th od . B W he n IC It es tb ar s a re u se d in te ns ile te st in g a s pr ov id ed fo ri n Sp ec ific at io n A 70 3/ A 70 3M ,t he ga ge le ng th to re du ce d se ct io n di am et er ra tio sh al lb e 4 to 1. A 351/A 351M – 00 4 NOTICE: This standard has either been superceded and replaced by a new version or discontinued. Contact ASTM International (www.astm.org) for the latest information. SUPPLEMENTARY REQUIREMENTS The following supplementary requirements shall not apply unless specified in the purchase order. A list of standardized supplementary requirements for use at the option of the purchaser is included in Specification A 703/A 703M. Those which are ordinarily considered suitable for use with this specification are given below. Others enumerated in Specification A 703/A 703M may be used with this specification upon agreement between the manufacturer and purchaser. S2. Destruction Tests S5. Radiographic Inspection S6. Liquid Penetrant Inspection S10. Examination of Weld Preparation S10.1 The method of performing the magnetic particle or liquid penetrant test shall be in accordance with Practice E 165 or Practice E 709. S11. Post Weld Heat Treatment S11.1 All austenitic castings, except Grades HK, HT, and CT15C, which have been subjected to weld repairs, shall be given a post weld solution heat treatment. ASTM International takes no position respecting the validity of any patent rights asserted in connection with any item mentioned in this standard. Users of this standard are expressly advised that determination of the validity of any such patent rights, and the risk of infringement of such rights, are entirely their own responsibility. This standard is subject to revision at any time by the responsible technical committee and must be reviewed every five years and if not revised, either reapproved or withdrawn. 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