1、Designation: A 592/A 592M 04Standard 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 yearof original ado
2、ption 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.1. Scope*1.1 This specification2covers high-strength quenched andtempered low-allo
3、y 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 no provision is
4、 made for supplementary re-quirements in this standard, the supplementary requirements inSpecification A 788 may be considered by the purchaser.1.3 Welding technique is of fundamental importance and itis presupposed that welding procedures will be in accordancewith approved methods for the class of
5、material used.1.4 The values stated in either inch-pound units or SI(metric) units are to be regarded separately as the standard;within the text and tables, the SI units are shown in brackets.The values stated in each system are not exact equivalents;therefore, each system must be used independently
6、 of the other.Combining values from the two systems may result in noncon-formance with the specification.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
7、 and Definitions for Mechanical Testingof Steel ProductsA 517/A 517M Specification for Pressure Vessel Plates,Alloy Steel, High-Strength, Quenched and TemperedA 788 Specification for Steel Forgings, General Require-mentsE 112 Test Methods for Determining the Average GrainSize3. Ordering Information
8、and General Requirements3.1 In addition to the ordering information required bySpecification A 788, the purchaser shall include with theinquiry 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 t
9、est tempera-ture lower than 32 F 0 C is required.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 788.3.2 Material suppli
10、ed to this specification shall conform tothe requirements of Specification A 788, which outlines addi-tional ordering information, manufacturing requirements, test-ing and retesting methods and procedures, marking, certifica-tion, product analysis variations, and additional supplementaryrequirements
11、. Failure to comply with the requirements ofSpecification A 788 constitutes non-conformance with thisspecification.3.3 If the requirements of this specification are in conflictwith the requirements of Specification A 788, the requirementsof this specification shall prevail.4. Materials and Manufactu
12、re4.1 Melting ProcessThe steel shall be made in accordancewith the Melting Process Section of Specification A 788.4.2 Grain SizeThe steel shall be fully killed, fine grained(ASTM No. 5 or finer), as determined in accordance with TestMethods E 112, Plate IV.4.3 DiscardSufficient discard shall be made
13、 from eachingot 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 May 1,
14、 2004. Published June 2004. Originallyapproved in 1968. Last previous edition approved in 1999 as A 592 89 (1999).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.as
15、tm.org, orcontact ASTM Customer Service at serviceastm.org. For Annual Book of ASTMStandards volume information, refer to the standards Document Summary page onthe ASTM website.1*A Summary of Changes section appears at the end of this standard.Copyright ASTM International, 100 Barr Harbor Drive, PO
16、Box C700, West Conshohocken, PA 19428-2959, United States.4.4 The finished product shall be a hot-worked forging asdefined by Specification A 788, and shall be forged as close aspracticable to the finished shape and size.5. Heat Treatment5.1 After forging and before reheating, the forgings shall bec
17、ooled to provide substantially complete transformation ofaustenite. Heat 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 th
18、an12 h.6. Chemical Requirements6.1 Heat AnalysisThe heat analysis obtained from sam-pling in accordance with Specification A 788 shall comply withTable 1.6.2 Product AnalysisThe purchaser may use the productanalysis provision of Specification A 788 to obtain a productanalysis from a forging represen
19、ting each heat or multiple heat.7. 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 values
20、of energy absorption in foot-pounds 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 addition
21、al thermal treatments thatshall be 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 majorworki
22、ng of the forging.7.2.3 Test specimens 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
23、they represent andshall be reduced 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 f
24、orgings represented. If aforging is 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 te
25、st specimens shall be at least T fromany 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 Ch
26、arpy V-notch specimens shall be made 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 Spec
27、imensIf the results of tensiontests do not conform to the requirements specified, retests arepermitted, as outlined in Test Method A 370 and SpecificationA 788.TABLE 1 Chemical RequirementsElement Composition, %Grade AAGrade EAGrade FACarbon0.150.21 0.120.20 0.100.20Manganese0.801.10 0.400.70 0.601.
28、00Phosphorus, 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 0.150.50Bor
29、on 0.0025 max 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. to 4 in.65 to 100 mm, inclTensile strength, psi
30、(MPa) 115 000 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
31、value for each of three specimens. See 7.3.3.A 592/A 592M 0427.3.3 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 m
32、ay be made. 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 per
33、mitted 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 788shall apply.10. Product Marking10.1 Each forging shall be identified in accord
34、ance with theMarking Section of Specification A 788.11. Keywords11.1 high-strength low-alloy steel; fittingssteel; pressurevessel service; quenched and tempered steel; steelforgingsalloySUMMARY OF CHANGESCommittee A01 has identified the location of the following changes since A 592/A 592M-89 (1999)
35、that mayimpact the use of this standard.(1) The 334 in 38 mm thickness has been standardized at 4in 100mm for Grades E and F.(2) The product analysis tolerances have been deleted fromTable 1.(3) Retest provisions of standards A 370 and A 788 arereferenced.(4) Charpy impact test requirements moved to
36、 a newTable 3.(5) Maximum Carbon content for grade F corrected tocomply with specification A 517/A 517M.ASTM International takes no position respecting the validity of any patent rights asserted in connection with any item mentionedin this standard. Users of this standard are expressly advised that
37、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 technical committee and must be reviewed every five years andif not revised, either reapprove
38、d 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 consideration at a meeting of theresponsible technical committee, which you may attend. If you feel
39、 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 Harbor 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 043
