1、Designation: A522/A522M 11A522/A522M 13Standard Specification forForged or Rolled 8 and 9% Nickel Alloy Steel Flanges,Fittings, Valves, and Parts for Low-Temperature Service1This standard is issued under the fixed designation A522/A522M; the number immediately following the designation indicates the
2、 yearof 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. Scope*1.1 This specification2 covers 8 and 9 % nickel-alloy
3、steel forged or rolled flanges, fittings, valves, and parts intended for usein welded pressure vessels for low-temperature service. The specification is applicable to forgings with maximum section thicknessof 3 in. 75 mm in the double normalized and tempered condition and 5 in. 125 mm in the quenche
4、d and tempered condition.Forgings under this specification are intended for service at operating temperatures not lower than 320 F 196 C for Type Ior 275 F 170 C for Type II or higher than 250 F 121 C.1.2 Material under this specification is available in two types having different chemical compositi
5、ons as follows:Type Nominal Nickel Content, %III981.3 This specification is expressed in both inch-pound units and SI units. However, unless the order specifies the applicable “M”specification designation (SI units), the material shall be furnished to inch-pound units.1.4 The values stated in either
6、 inch-pound units or SI units are to be regarded separately as standard. Within the text, the SI unitsare shown in brackets. The values stated in each system may not be exact equivalents; therefore, each system shall be usedindependently of the other. Combining values from the two systems may result
7、 in non-conformance with the standard.2. Referenced Documents2.1 ASTM Standards:3A788/A788M Specification for Steel Forgings, General RequirementsA961/A961M Specification for Common Requirements for Steel Flanges, Forged Fittings, Valves, and Parts for PipingApplications3. General Requirements and O
8、rdering Information3.1 Product furnished to this specification shall conform to the requirements of Specification A961/A961M, including anysupplementary requirements that are indicated in the purchase order. Failure to comply with the requirements of SpecificationA961/A961M constitutes nonconformanc
9、e with this specification.3.2 It is the purchasers responsibility to specify in the purchase order all ordering information necessary to furnish the neededmaterial. Examples of such information include but are not limited to the ordering information in Specification A961/A961M andfollowing:3.2.1 Any
10、 supplementary requirements, and3.2.2 Additional requirements, (See 4.5, 5.2, 6.1, 7.2, and 10.3).4. Materials and Manufacture4.1 The steel shall be produced in accordance with the melting process section of Specification A788/A788M.4.2 Material for forgings shall consist of ingots, or either forged
11、 or rolled blooms, billets, or bars.1 This specification is under the jurisdiction ofASTM Committee A01 on Steel, Stainless Steel and RelatedAlloys and is the direct responsibility of Subcommittee A01.22on Steel Forgings and Wrought Fittings for Piping Applications and Bolting Materials for Piping a
12、nd Special Purpose Applications.Current edition approved May 1, 2011Oct. 1, 2013. Published June 2011October 2013. Originally approved in 1964. Last previous edition approved in 20072011 asA522/A522M07.11. DOI: 10.1520/A0522_A0522M-11.10.1520/A0522_A0522M-13.2 For ASME Boiler and Pressure Vessel Cod
13、e applications see related Specification SA-522 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
14、 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. Becauseit may not be technically possible to adequately depict all changes accurately, ASTM recommends that users con
15、sult prior editions as appropriate. 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
16、, PA 19428-2959. United States14.3 The finished product shall be a forging as defined in the Terminology Section of Specification A788/A788M.4.4 Except for flanges of all types, hollow cylindrically shaped parts may be made from hot-rolled or forged bar, provided thatthe axial length of the part is
17、approximately parallel to the metal flow lines of the stock. Except for all types of flanges, elbows,return bends, tees, and header tees, other parts up to and including NPS 4 may be machined from hot-rolled or forged bar.4.5 When specified in the order, the manufacturer shall submit for purchasers
18、approval a sketch showing the shape of the roughforging before machining.5. Chemical Composition5.1 The steel shall conform to the requirements of Table 1.5.2 If required by the purchaser, product analysis may be performed in accordance with the requirements of A961/A961M.6. Heat Treatment6.1 The fo
19、rgings shall be heat treated by the manufacturer by either of the following methods as mutually agreed upon betweenthe purchaser and the manufacturer.6.1.1 Quenched and TemperedHeat to a uniform temperature of 1475 6 25 F 800 6 15 C; hold at this temperature fora minimum time of 1 h/in. 2.5 min/mm o
20、f thickness but in no case less than 30 min; quench by immersion in circulating water.Reheat until the forging attains a uniform temperature within the range from 1050 to 1125 F 565 to 605 C; hold at thistemperature for a minimum time of 1 h/in. 2.5 min/mm of thickness but in no case less than 30 mi
21、n; cool in air or water quench,at a rate not less than 300 F 165 C/h.6.1.2 Double Normalized and Tempered Heat to a uniform temperature of 1650 F 900 C; hold at this temperature for aminimum time of 1 h/in. 2.5 min/mm of thickness but in no case less than 30 min; cool in air. Reheat until the forgin
22、g attainsa uniform temperature of 1450 F 790 C; hold at this temperature for a minimum time of 1 h/in. 2.5 min/mm of thickness butin no case less than 30 min; cool in air. Reheat to a uniform temperature within the range from 1050 to 1125 F 565 to 605 C;hold at this temperature for a minimum time of
23、 1 h/in. 2.5 min/mm of thickness but in no case less than 30 min; cool in air orwater quench, at a rate not less than 300 F 165 C/h.6.2 When stress relieving is to be performed after fabrication, the recommended stress-relieving treatment is as follows:gradually and uniformly heat the steel to a tem
24、perature between 1025 and 1085 F 550 and 585 C; hold for a minimum of 2h for thicknesses up to 1 in. 25 mm. For thicknesses over 1 in. 25 mm, a minimum additional holding time in the ratio of 1h/in. 2.5 min/mm of thickness in excess of 1 in. 25 mm shall be added. Cool at a minimum rate of 300 F 165
25、C/h to atemperature not exceeding 600 F 315 C.7. Mechanical Properties7.1 Tension TestForgings to Types 1 and 2 shall conform to the tensile requirements of Table 2.7.2 Impact TestThe Charpy impact test requirements in Table 3 shall be met unless Supplementary Requirement S2 of thisspecification has
26、 been specified.7.2.1 The values for energy absorption and the fracture appearance in percentage of shear fracture for each specimen shall berecorded and reported for information.8. Workmanship, Finish, and Appearance8.1 The forgings shall have a workman-like finish and shall be free of injurious de
27、fects.9. Number of Tests and Retests9.1 At least one tension test and one set of Charpy V-notch impact tests shall be made from each heat in each heat-treatmentcharge.TABLE 1 Chemical RequirementsComposition, %Type I Type IICarbon, max 0.13 0.13Manganese, max 0.90 0.90Phosphorus, max 0.025 0.025Sulf
28、ur, max 0.025 0.025SiliconA 0.150.30 0.150.30Nickel 8.59.5 7.58.5A When vacuum carbon deoxidation is used, the maximum silicon content shall be0.10 %.A522/A522M 1329.2 If the results of the mechanical tests do not conform to the specified requirements, the manufacturer may retreat the forgings,but n
29、ot more than three additional times. Retreatment involves re-austenitizing the forgings. Retests shall be made in accordancewith this section.9.3 If the lateral expansion result from one Charpy impact specimen falls below 0.015in. 0.38mm, 0.015 in. 0.38 mm, butnot less than 0.010in. 0.25mm, 0.010 in
30、. 0.25 mm, and the average test result equals or exceeds 0.015mm 0.38mm, 0.015 mm0.38 mm, then one retest of three additional specimens may be made. The lateral expansion obtained from each of the three retestspecimens shall equal or exceed 0.015in. 0.38mm.0.015 in. 0.38 mm.10. Test Specimens10.1 Th
31、e test specimens shall be located at any point midway between the center and surface of solid forgings, and at any pointmid-thickness of the heaviest section of hollow or bored forgings. For solid forgings where test metal is provided on the periphery,test specimens shall be taken at mid-thickness o
32、f the test prolongation.10.2 Tests shall be oriented so that the longitudinal axis of the specimen is parallel to the major direction of grain flow.10.3 When fabrication requires stress relieving, the purchaser shall specify stress relieving of the test pieces prior to machiningof the test specimens
33、. Stress relieving shall be carried out as prescribed in 6.2.11. Method of Impact Testing11.1 The impact test shall be made in accordance with the simple beam, Charpy type of test.11.2 Precaution shall be taken so that when broken, the test specimens shall be within 6 3 F 1.7 C of the specified test
34、temperature.12. Inspection12.1 The inspector representing the purchaser shall have free entry, at all times while work on the contract of the purchaser isbeing performed, to all parts of the manufacturers works that concern the manufacture of the material ordered. The manufacturershall afford the in
35、spector all reasonable facilities to satisfy the inspector that the material is being furnished in accordance with thisspecification.All tests (except product analysis) and inspection shall be made at the place of manufacture prior to shipment, unlessotherwise specified, and shall be conducted so as
36、 not to interfere unnecessarily with the operation of the works.12.2 The manufacturer shall report to the purchaser or the purchasers representative the heat treatments applied to the materialand to the test blocks and the results of the chemical analysis and mechanical tests made in accordance with
37、 this specification andthe heat number or his heat identification.13. Rejection13.1 Unless otherwise specified, any rejection based on tests made in accordance with Section 5 and 7 shall be reported to themanufacturer within 60 days from the receipt of samples or test reports by the purchaser.13.2 E
38、ach forging in which injurious metal defects are exposed during subsequent machining shall be rejected and themanufacturer notified.14. Certification14.1 See Specification A961/A961M.TABLE 2 Tensile Requirements at Room TemperatureTensile strength, min, ksi MPa 100 690Yield strength, min, (0.2 % off
39、-set), ksi MPa 75 515Elongation in 2 in. 50mm, min, % 22Reduction of area, min, % 45TABLE 3 Charpy V-Notch Lateral Expansion Requirements ForStandard Size 10 X 10 mm SpecimensType Lateral expansionin. mmTemperatureF CAReport absorbedenergy and % shearfracture1 0.0150.38320195Yes2 0.0150.38275170YesA
40、 Except when Supplementary Requirement S2 is specified.A522/A522M 13314.2 Test reports, when required, shall include certification that all requirements of this specification have been met. Themanufacturer shall provide reports shall include the following where applicable:14.2.1 Whether Type 1 or Ty
41、pe 11 material has been supplied and the chemical analysis results in accordance with Section 5,14.2.2 Type of heat treatment used,14.2.3 Results of tension tests Section 7 (Table 2), report the yield strength and tensile strength, in ksi MPa, elongation andreduction in area, in percent,14.2.4 Resul
42、ts of tension and Charpy impact tests (together withSection 11 (Table 3absorbed energy), report lateral expansion,absorbed energy, and % shear fracture)fracture including the impact test temperature, and test coupon stress relief details ifapplicable, and14.2.5 Results of any additional or Any suppl
43、ementary requirements specified by the purchaser, andpurchase order.14.1.5 The year date and revision letter, if any, of the specification. Note, this information is not required to be marked on theforgings.15. Product Marking15.1 Each forging shall be legibly stamped by theIn addition to the markin
44、g requirements of Specification A961/A961Mmanufacturer with the heat number or his heat identification, the manufacturers name (see , each forging shall be legiblystamped Note 1) or trademark, and this specification number, A522 or A522M as applicable, 8NI, or 9NI, and QT or NNT asapplicable.NOTE 1F
45、or purposes of identification marking, the manufacturer is considered the organization that certifies the piping component was manufactured,sampled, and tested in accordance with this specification and the results have been determined to meet the requirements of this specification.15.2 Forgings impa
46、ct tested at a temperature other than that specified in Table 3, by the use of Supplementary Requirement S2,shall be marked with the letters LTV following the specification number, as well as the temperature scale used. For forgings toA522, these letters shall be followed by the impact test temperat
47、ure in degrees Fahrenheit. A prefix 0 to the test temperatureindicates a temperature below 0 F, for example A522 Type 1 LTV0300F indicates 300 F. For forgings to A522M, the lettersLTV shall be followed by the impact test temperature in degrees Celsius.Aprefix 0 to the test temperature indicates a te
48、mperaturebelow 0 C, for example A522M Type 1 LTV0150C indicates 150 C.15.3 The purchaser may specify additional identification marking and the location of all stamping. The type of stamps shall beround or “interrupted-dot” die stamps having a radius of 132 in. 0.8 mm.15.4 Bar CodingIn addition to th
49、e requirements in 15.1, 15.2, and 15.3, bar coding is acceptable as a supplementalidentification method. The purchaser may specify in the order a specific bar coding system to be used. The bar coding system, ifapplied at the discretion of the supplier, should be consistent with one of the published industry standards for bar coding. If usedon small parts, the bar code may be applied to the box or a substantially applied tag.16.
