1、Designation: A 592/A 592M 04 (Reapproved 2009)Standard Specification forHigh-Strength Quenched and Tempered Low-Alloy SteelForged Fittings and Parts for Pressure Vessels1This standard is issued under the fixed designation A 592/A 592M; the number immediately following the designation indicates the y
2、earof 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 () indicates an editorial change since the last revision or reapproval.1. Scope1.1 This specification2covers high-strength quenched andt
3、empered low-alloy steel forged fittings and parts for pressurevessels. The maximum thickness of forgings under this speci-fication shall be 112 in. 38 mm for Grade A, and 4 in. 100mm for Grades E and F.NOTE 1These grades are similar to corresponding grades in Specifi-cation A 517/A 517M.1.2 Although
4、 no provision is made for supplementary re-quirements in this standard, the supplementary requirements inSpecification A 788/A 788M may be considered by the pur-chaser.1.3 Welding technique is of fundamental importance and itis presupposed that welding procedures will be in accordancewith approved m
5、ethods for the class of material used.1.4 The values stated in either SI units or inch-pound unitsare to be regarded separately as standard. The values stated ineach system may not be exact equivalents; therefore, eachsystem shall be used independently of the other. Combiningvalues from the two syst
6、ems may result in non-conformancewith the standard.1.5 Unless the order specifies the applicable “M” specifica-tion designation, the material shall be furnished to the inch-pound units.2. Referenced Documents2.1 ASTM Standards:3A 370 Test Methods and Definitions for Mechanical Testingof Steel Produc
7、tsA 517/A 517M Specification for Pressure Vessel Plates,Alloy Steel, High-Strength, Quenched and TemperedA 788/A 788M Specification for Steel Forgings, GeneralRequirementsE112 Test Methods for Determining Average Grain Size3. Ordering Information and General Requirements3.1 In addition to the orderi
8、ng information required bySpecification A 788/A 788M, the purchaser shall include withthe inquiry and order the following information:3.1.1 A detailed drawing, a sketch, or written description ofthe forging.3.1.2 The charpy impact test temperature if a test tempera-ture lower than 32F 0C is required
9、.3.1.3 Additional heat treatment cycles to be applied to themechanical test specimens following removal from the heat-treated forging or special forged test block.3.1.4 Required supplementary requirement(s) from Specifi-cation A 788/A 788M.3.2 Material supplied to this specification shall conform to
10、the requirements of Specification A 788/A 788M, which out-lines additional ordering information, manufacturing require-ments, testing and retesting methods and procedures, marking,certification, product analysis variations, and additional supple-mentary requirements. Failure to comply with the requi
11、rementsof Specification A 788/A 788M constitutes non-conformancewith this specification.3.3 If the requirements of this specification are in conflictwith the requirements of Specification A 788/A 788M, therequirements of this specification shall prevail.4. Materials and Manufacture4.1 Melting Proces
12、sThe steel shall be made in accordancewith the Melting Process Section of Specification A 788/A 788M.4.2 Grain SizeThe steel shall be fully killed, fine grained(ASTM No. 5 or finer), as determined in accordance with TestMethods E112, Plate IV.4.3 DiscardSufficient discard shall be made from eachingo
13、t to ensure freedom from piping and excessive segregation.1This specification is under the jurisdiction of ASTM Committee A01 on Steel,Stainless Steel and Related Alloys and is the direct responsibility of SubcommitteeA01.06 on Steel Forgings and Billets.Current edition approved April 1, 2009. Publi
14、shed April 2009. Originallyapproved in 1968. Last previous edition approved in 2004 as A 592/A 592M 04.2For ASME Boiler and Pressure Vessel Code applications see related Specifi-cation SA-592/SA-592M in Section II of that Code.3For referenced ASTM standards, visit the ASTM website, www.astm.org, orc
15、ontact ASTM Customer Service at serviceastm.org. For Annual Book of ASTMStandards volume information, refer to the standards Document Summary page onthe ASTM website.1Copyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.4.4 The finished pr
16、oduct shall be a hot-worked forging asdefined by Specification A 788/A 788M, and shall be forged asclose as practicable to the finished shape and size.5. Heat Treatment5.1 After forging and before reheating, the forgings shall becooled to provide substantially complete transformation ofaustenite. He
17、at treatment for properties shall consist of heatingthe forgings to not less than 1650F 900C, quenching in aliquid medium, and tempering at 1150F 620C minimum,with a holding time of 1 h/in. 1 h/25 mm minimum, but in nocase less than12 h.6. Chemical Requirements Chemical Requirements6.1 Heat Analysis
18、The heat analysis obtained from sam-pling in accordance with Specification A 788/A 788M shallcomply with Table 1.6.2 Product AnalysisThe purchaser may use the productanalysis provision of Specification A 788/A 788M to obtain aproduct analysis from a forging representing each heat ormultiple heat.7.
19、Mechanical Requirements7.1 The forgings as represented by tension tests shallconform to the requirements prescribed in Table 2, and to Table3 for lateral expansion opposite the notch in Charpy V-notchimpact tests. In addition, for the Charpy impact test, the valuesof energy absorption in foot-pounds
20、 or joules and the fractureappearance in percent shear shall be recorded and reported forinformation.7.2 Sampling:7.2.1 Samples for mechanical test specimens shall be re-moved after the quenching and tempering heat treatment. Thepurchaser shall specify any additional thermal treatments thatshall be
21、given to the heat treated test specimens. (This isintended to simulate subsequent thermal treatments which maybe performed by the fabricator.)7.2.2 Samples shall be removed so that the test specimenswill have their major axes parallel to the direction of majorworking of the forging.7.2.3 Test specim
22、ens may be machined from a productionforging, or prolongation thereof, or from special forged blockssuitably worked and heat treated with the production forgings.Such special blocks shall be obtained from an ingot, slab, orbillet from the same heat as the forgings they represent andshall be reduced
23、by forging in a manner similar to that for theproducts to be represented. The forging reduction for a specialtest block shall not exceed the minimum forging reduction ofthe forgings represented, and its thickness shall not be less thanthe maximum thickness of the forgings represented. If aforging is
24、 tested, the tests must represent the maximum sectionthickness in the lot. All test specimens shall be located at themid-plane of the thickness and, the mid length position of thegauge length ffoor tension test specimens, or the notch of theCharpy V-notch impact test specimens shall be at least T fr
25、omany second surface of the production forging or test block,where T equals the maximum heat treated thickness of theforging.7.3 Number of Tests and Retests:7.3.1 Number of Tests, and Test Temperature:7.3.1.1 One room-temperature tension test and one set ofthree Charpy V-notch specimens shall be mad
26、e to represent themaximum section from each heat in each heat-treatmentcharge. Impact tests shall be conducted at the temperaturespecified on the order, but no higher than 32F 0C.7.3.1.2 One grain size test shall be made from each heat.7.3.2 Retests of Tension SpecimensIf the results of tensiontests
27、 do not conform to the requirements specified, retests arepermitted, as outlined in Test Methods and Definitions A 370and Specification A 788/A 788M.TABLE 1 Chemical RequirementsElement Composition, %Grade AAGrade EAGrade FACarbon0.150.21 0.120.20 0.100.20Manganese0.801.10 0.400.70 0.601.00Phosphoru
28、s, max 0.025 0.025 0.025Sulfur, max 0.025 0.025 0.025Silicon0.400.80 0.200.35 0.150.35Nickel. . . . . . 0.701.00Chromium0.500.80 1.402.00 0.400.65Molybdenum0.180.28 0.400.60 0.400.60Vanadium.B0.030.08Titanium. . . 0.040.10 . . .Zirconium0.050.15 . . . . . .Copper. . . 0.200.40 0.150.50Boron 0.0025 m
29、ax 0.00150.005 0.0020.006ASimilar to Specification A 517/A 517M Grades A, E, and F, respectively.BMay be substituted for part or all of titanium content on a one for one basis.TABLE 2 Tensile RequirementsUp to 212 in.65 mm, inclOver 212 in.to4in.65 to 100 mm, inclTensile strength, psi (MPa) 115 000
30、to 135 000 105 000 to 135 000795 to 930 725 to 930Yield strength (0.2 % offset), min, 100 000 690 90 000 620psi MPaElongation in 2 in. 50 mm, 18 17min, %Reduction of area, min, % 45 40TABLE 3 Charpy Impact Test RequirementsAll Grades and Thicknesses 15 mils (0.015 in) 0.38 mmAAMinimum value for each
31、 of three specimens. See 7.3.3.A 592/A 592M 04 (2009)27.3.3 Retests of Impact Specimens:7.3.3.1 If the lateral expansion value for one specimen isbelow 0.015 in. 0.38 mm but not below 0.010 in. 0.25 mmand the average equals or exceeds 0.015 in. 0.38 mm, a retestof three additional specimens may be m
32、ade. Each of the threeretest specimens must equal or exceed the specified minimumvalue of 0.015 in. 0.38 mm.7.4 Test MethodsTension and impact tests shall be madein accordance with the latest issue of Test Methods andDefinitions A 370.8. Repair Welding8.1 Repair welding of forgings may be permitted
33、but onlyatthe option of the purchaser. Such repair welds shall be made inaccordance with Section IX of the ASME Boiler and PressureVessel Code.9. Test Reports9.1 The certification requirements of Specification A 788/A 788M shall apply.10. Product Marking10.1 Each forging shall be identified in accor
34、dance with theMarking Section of Specification A 788/A 788M.11. Keywords11.1 high-strength low-alloy steel; fittingssteel; pressurevessel service; quenched and tempered steel; steelforgingsalloyASTM International takes no position respecting the validity of any patent rights asserted in connection w
35、ith any item mentionedin this standard. Users of this standard are expressly advised that determination of the validity of any such patent rights, and the riskof infringement of such rights, are entirely their own responsibility.This standard is subject to revision at any time by the responsible tec
36、hnical committee and must be reviewed every five years andif not revised, either reapproved or withdrawn. Your comments are invited either for revision of this standard or for additional standardsand should be addressed to ASTM International Headquarters. Your comments will receive careful considera
37、tion at a meeting of theresponsible technical committee, which you may attend. If you feel that your comments have not received a fair hearing you shouldmake your views known to the ASTM Committee on Standards, at the address shown below.This standard is copyrighted by ASTM International, 100 Barr H
38、arbor Drive, PO Box C700, West Conshohocken, PA 19428-2959,United States. Individual reprints (single or multiple copies) of this standard may be obtained by contacting ASTM at the aboveaddress or at 610-832-9585 (phone), 610-832-9555 (fax), or serviceastm.org (e-mail); or through the ASTM website(www.astm.org).A 592/A 592M 04 (2009)3
