1、Designation: A522/A522M 14Standard 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 yearof origi
2、nal 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 specification2covers 8 and 9 % nickel-alloy steelforged or
3、 rolled flanges, fittings, valves, and parts intended foruse in welded pressure vessels for low-temperature service.The specification is applicable to forgings with maximumsection thickness of 3 in. 75 mm in the double normalizedand tempered condition and 5 in. 125 mm in the quenchedand tempered con
4、dition. Forgings under this specification areintended for service at operating temperatures not lower than320 F 196 C for Type I or 275 F 170 C for TypeII or higher than 250 F 121 C.1.2 Material under this specification is available in twotypes having different chemical compositions as follows:Type
5、Nominal Nickel Content, %III981.3 This specification is expressed in both inch-pound unitsand SI units. However, unless the order specifies the applicable“M” specification designation (SI units), the material shall befurnished to inch-pound units.1.4 The values stated in either inch-pound units or S
6、I unitsare to be regarded separately as standard. Within the text, theSI units are shown in brackets. The values stated in eachsystem may not be exact equivalents; therefore, each systemshall be used independently of the other. Combining valuesfrom the two systems may result in non-conformance with
7、thestandard.2. Referenced Documents2.1 ASTM Standards:3A788/A788M Specification for Steel Forgings, General Re-quirementsA961/A961M Specification for Common Requirements forSteel Flanges, Forged Fittings, Valves, and Parts forPiping Applications3. General Requirements and Ordering Information3.1 Pro
8、duct furnished to this specification shall conform tothe requirements of Specification A961/A961M, including anysupplementary requirements that are indicated in the purchaseorder. Failure to comply with the requirements of SpecificationA961/A961M constitutes nonconformance with this specifica-tion.3
9、.2 It is the purchasers responsibility to specify in thepurchase order all ordering information necessary to furnishthe needed material. Examples of such information include butare not limited to the ordering information in SpecificationA961/A961M and following:3.2.1 Any supplementary requirements,
10、and3.2.2 Additional requirements, (See 4.5, 5.2, 6.1, 7.2, and10.3).4. Materials and Manufacture4.1 The steel shall be produced in accordance with themelting process section of Specification A788/A788M.4.2 Material for forgings shall consist of ingots, or eitherforged or rolled blooms, billets, or b
11、ars.4.3 The finished product shall be a forging as defined in theTerminology Section of Specification A788/A788M.4.4 Except for flanges of all types, hollow cylindricallyshaped parts may be made from hot-rolled or forged bar,provided that the axial length of the part is approximatelyparallel to the
12、metal flow lines of the stock. Except for all typesof flanges, elbows, return bends, tees, and header tees, otherparts up to and including NPS 4 may be machined fromhot-rolled or forged bar.4.5 When specified in the order, the manufacturer shallsubmit for purchasers approval a sketch showing the sha
13、pe ofthe rough forging before machining.1This specification is under the jurisdiction of ASTM Committee A01 on Steel,Stainless Steel and Related Alloys and is the direct responsibility of SubcommitteeA01.22 on Steel Forgings and Wrought Fittings for PipingApplications and BoltingMaterials for Piping
14、 and Special Purpose Applications.Current edition approved Oct. 1, 2014. Published October 2014. Originallyapproved in 1964. Last previous edition approved in 2013 s A522/A522M13. DOI:10.1520/A0522_A0522M-14.2For ASME Boiler and Pressure Vessel Code applications see related Specifi-cation SA-522 in
15、Section II of that Code.3For referenced ASTM standards, visit the ASTM website, www.astm.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.*A Summary of Changes section appears
16、 at the end of this standardCopyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States15. Chemical Composition5.1 The steel shall conform to the requirements of Table 1.5.2 If required by the purchaser, product analysis may beperformed in accord
17、ance with the requirements of A961/A961M.6. Heat Treatment6.1 The forgings shall be heat treated by the manufacturerby either of the following methods as mutually agreed uponbetween the purchaser and the manufacturer.6.1.1 Quenched and TemperedHeat to a uniform tempera-ture of 1475 6 25 F 800 6 15 C
18、; hold at this temperaturefor a minimum time of 1 h/in. 2.5 min/mm of thickness butin no case less than 30 min; quench by immersion in circulatingwater. Reheat until the forging attains a uniform temperaturewithin the range from 1050 to 1125 F 565 to 605 C; hold atthis temperature for a minimum time
19、 of 1 h/in. 2.5 min/mmof thickness but in no case less than 30 min; cool in air or waterquench, at a rate not less than 300 F 165 C/h.6.1.2 Double Normalized and TemperedHeat to a uniformtemperature of 1650 F 900 C; hold at this temperature fora minimum time of 1 h/in. 2.5 min/mm of thickness but in
20、 nocase less than 30 min; cool in air. Reheat until the forgingattains a uniform temperature of 1450 F 790 C; hold at thistemperature for a minimum time of 1 h/in. 2.5 min/mm ofthickness but in no case less than 30 min; cool in air. Reheat toa uniform temperature within the range from 1050 to 1125 F
21、565 to 605 C; hold at this temperature for a minimum timeof 1 h/in. 2.5 min/mm of thickness but in no case less than 30min; cool in air or water quench, at a rate not less than 300 F165 C/h.6.2 When stress relieving is to be performed afterfabrication, the recommended stress-relieving treatment is a
22、sfollows: gradually and uniformly heat the steel to a temperaturebetween 1025 and 1085 F 550 and 585 C; hold for aminimum of 2 h for thicknesses up to 1 in. 25 mm. Forthicknesses over 1 in. 25 mm, a minimum additional holdingtime in the ratio of 1 h/in. 2.5 min/mm of thickness in excessof 1 in. 25 m
23、m shall be added. Cool at a minimum rate of 300F 165 C/h to a temperature not exceeding 600 F 315 C.7. Mechanical Properties7.1 Tension TestForgings to Types 1 and 2 shall conformto the tensile requirements of Table 2.7.2 Impact TestThe Charpy impact test requirements inTable 3 shall be met unless S
24、upplementary Requirement S2 ofthis specification has been specified.7.2.1 The values for energy absorption and the fractureappearance in percentage of shear fracture for each specimenshall be recorded and reported for information.8. Surface Finish, Appearance, and Corrosion Protection8.1 The require
25、ments of Specification A961/A961M applyto forgings and finished parts.9. Number of Tests and Retests9.1 At least one tension test and one set of Charpy V-notchimpact tests shall be made from each heat in each heat-treatment charge.9.2 If the results of the mechanical tests do not conform tothe speci
26、fied requirements, the manufacturer may retreat theforgings, but not more than three additional times. Retreatmentinvolves re-austenitizing the forgings. Retests shall be made inaccordance with this section.9.3 If the lateral expansion result from one Charpy impactspecimen falls below 0.015 in. 0.38
27、 mm, but not less than0.010 in. 0.25 mm, and the average test result equals orexceeds 0.015 mm 0.38 mm, then one retest of threeadditional specimens may be made. The lateral expansionobtained from each of the three retest specimens shall equal orexceed 0.015 in. 0.38 mm.10. Test Specimens10.1 The te
28、st specimens shall be located at any pointmidway between the center and surface of solid forgings, andat any point mid-thickness of the heaviest section of hollow orbored forgings. For solid forgings where test metal is providedon the periphery, test specimens shall be taken at mid-thicknessof the t
29、est prolongation.10.2 Tests shall be oriented so that the longitudinal axis ofthe specimen is parallel to the major direction of grain flow.TABLE 1 Chemical RequirementsComposition, %Type I Type IICarbon, max 0.13 0.13Manganese, max 0.90 0.90Phosphorus, max 0.025 0.025Sulfur, max 0.025 0.025SiliconA
30、0.150.30 0.150.30Nickel 8.59.5 7.58.5AWhen vacuum carbon deoxidation is used, the maximum silicon content shall be0.10 %.TABLE 2 Tensile Requirements at Room TemperatureTensile strength, min, ksi MPa 100 690Yield strength, min, (0.2 % off-set), ksi MPa 75 515Elongation in 2 in. 50mm, min, % 22Reduct
31、ion 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 0.0150.38275170YesAExcept when Supplementary Requirement S2 is specified.A522/A52
32、2M 14210.3 When fabrication requires stress relieving, the pur-chaser shall specify stress relieving of the test pieces prior tomachining of the test specimens. Stress relieving shall becarried out as prescribed in 6.2.11. Method of Impact Testing11.1 The impact test shall be made in accordance with
33、 thesimple beam, Charpy type of test.11.2 Precaution shall be taken so that when broken, the testspecimens shall be within 6 3 F 1.7 C of the specified testtemperature.12. Inspection12.1 The inspector representing the purchaser shall havefree entry, at all times while work on the contract of thepurc
34、haser is being performed, to all parts of the manufacturersworks that concern the manufacture of the material ordered.The manufacturer shall afford the inspector all reasonablefacilities to satisfy the inspector that the material is beingfurnished in accordance with this specification. All tests(exc
35、ept product analysis) and inspection shall be made at theplace of manufacture prior to shipment, unless otherwisespecified, and shall be conducted so as not to interfereunnecessarily with the operation of the works.12.2 The manufacturer shall report to the purchaser or thepurchasers representative t
36、he heat treatments applied to thematerial and to the test blocks and the results of the chemicalanalysis and mechanical tests made in accordance with thisspecification and the heat number or his heat identification.13. Rejection13.1 Unless otherwise specified, any rejection based on testsmade in acc
37、ordance with Section 5 and 7 shall be reported tothe manufacturer within 60 days from the receipt of samples ortest reports by the purchaser.13.2 Each forging in which injurious metal defects areexposed during subsequent machining shall be rejected and themanufacturer notified.14. Certification14.1
38、See Specification A961/A961M.14.2 Test reports shall include the following where appli-cable:14.2.1 Whether Type 1 or Type 11 material has beensupplied and the chemical analysis results in accordance withSection 5,14.2.2 Type of heat treatment used,14.2.3 Results of tension tests Section 7 (Table 2)
39、, report theyield strength and tensile strength, in ksi MPa, elongation andreduction in area, in percent,14.2.4 Charpy impact tests Section 11 (Table 3), reportlateral expansion, absorbed energy, and % shear fractureincluding the impact test temperature, and test coupon stressrelief details if appli
40、cable, and14.2.5 Any supplementary requirements specified by thepurchase order.15. Product Marking15.1 In addition to the marking requirements of Specifica-tion A961/A961M, each forging shall be legibly stamped 8NI,or 9NI, and QT or NNT as applicable.15.2 Forgings impact tested at a temperature othe
41、r than thatspecified in Table 3, by the use of Supplementary RequirementS2, shall be marked with the letters LTV following thespecification number, as well as the temperature scale used. Forforgings to A522, these letters shall be followed by the impacttest temperature in degrees Fahrenheit. A prefi
42、x 0 to the testtemperature indicates a temperature below 0 F, for exampleA522 Type 1 LTV0300F indicates 300 F. For forgings toA522M, the letters LTV shall be followed by the impact testtemperature in degrees Celsius. A prefix 0 to the test tempera-ture indicates a temperature below 0 C, for example
43、A522MType 1 LTV0150C indicates 150 C.15.3 The purchaser may specify additional identificationmarking and the location of all stamping. The type of stampsshall be round or “interrupted-dot” die stamps having a radiusof132 in. 0.8 mm.15.4 Bar CodingIn addition to the requirements in 15.1,15.2, and 15.
44、3, bar coding is acceptable as a supplementalidentification method. The purchaser may specify in the ordera specific bar coding system to be used. The bar coding system,if applied at the discretion of the supplier, should be consistentwith one of the published industry standards for bar coding. Ifus
45、ed on small parts, the bar code may be applied to the box ora substantially applied tag.16. Keywords16.1 low temperature applications; nickel alloy steel; pipefittings; steel; piping applications; pressure containing parts;steel flanges; steel forgings; alloy; steel valvesA522/A522M 143SUPPLEMENTARY
46、 REQUIREMENTSOne or more of the supplementary requirements described below may be included in purchasersorder or contract. When so included, a supplementary requirement shall have the same force as if itwere in the body of the specification. Supplementary requirement details not fully described shal
47、l beagreed upon between the purchaser and the supplier, but shall not negate any of the requirements inthe body of the specification.S1. Nondestructive TestsS1.1 Ultrasonic TestsUltrasonic tests may be made byagreement between manufacturer and purchaser.S1.2 Liquid Penetrant TestsLiquid penetrant te
48、sts may bemade by agreement between manufacturer and purchaser.S2. Other Impact Test TemperaturesS2.1 The purchaser may specify an impact test temperaturehigher than that in Table 3 but no higher than the minimumintended operating temperature for the forging.S2.2 Marking shall be in accordance with
49、.SUMMARY OF CHANGESCommittee A01 has identified the location of selected changes to this specification since the last issue,A522/A522M13, that may impact the use of this specification. (Approved October 1, 2014)(1) Revised Section 8 to clarify requirements for SurfaceFinish, Appearance, and Corrosion Protection.Committee A01 has identified the location of selected changes to this specification since the last issue,A522/A522M11, that ma
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