1、Designation: A645/A645M 10Standard Specification forPressure Vessel Plates, 5 % and 512 % Nickel Alloy Steels,Specially Heat Treated1This standard is issued under the fixed designation A645/A645M; the number immediately following the designation indicates the yearof original adoption or, in the case
2、 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 specially heat treated 5 % and512 % nickel alloy steel plates int
3、ended primarily for weldedpressure vessels for service at low or cryogenic temperatures.1.2 The maximum thickness of plates which can be suppliedunder this specification is limited only by the capacity of thematerial to meet the specified requirements.1.3 This material is susceptible to magnetizatio
4、n. Use ofmagnets in handling after heat treatment should be avoided ifresidual magnetism would be detrimental to subsequent fabri-cation or service.1.4 The values stated in either inch-pound units or SI unitsare to be regarded separately as standard. Within the text, theSI units are shown in bracket
5、s. The values stated in eachsystem are not exact equivalents; therefore, each system mustbe used independently of the other. Combining values from thetwo systems may result in nonconformance with the specifi-cation.1.5 This standard does not purport to address all of thesafety concerns, if any, asso
6、ciated with its use. It is theresponsibility of the user of this standard to establish appro-priate safety and health practices and determine the applica-bility of regulatory limitations prior to use.2. Referenced Documents2.1 ASTM Standards:3A20/A20M Specification for General Requirements forSteel
7、Plates for Pressure VesselsA435/A435M Specification for Straight-Beam UltrasonicExamination of Steel PlatesA577/A577M Specification for Ultrasonic Angle-Beam Ex-amination of Steel PlatesA578/A578M Specification for Straight-Beam UltrasonicExamination of Rolled Steel Plates for Special Applica-tions3
8、. General Requirements and Ordering Information3.1 Plates supplied to this material specification shall con-form to Specification A20/A20M. These requirements outlinethe testing and retesting methods and procedures, permittedvariations in dimensions and mass, quality and repair ofdefects, marking, l
9、oading, and ordering information.3.2 In addition to the basic requirements of this specifica-tion, certain supplementary requirements are available whenadditional control, testing, or examination is required to meetend use requirements. The purchaser is referred to the listedsupplementary requiremen
10、ts in this specification and to thedetailed requirements in Specification A20/A20M.3.3 If the requirements of this specification are in conflictwith the requirements of Specification A20/A20M, the require-ments of this specification shall prevail.4. Materials and Manufacture4.1 Steelmaking PracticeT
11、he steel shall be killed andshall conform to the fine austenitic grain size requirements ofSpecification A20/A20M.5. Heat Treatment5.1 Grade A plates shall be heat treated in accordance with5.2. Grade B plates shall be heat treated in accordance with 5.3.Shell plates and other parts, including heads
12、 and reinforcingpads that are heated above 1125F 605C for forming, shallbe heat treated after forming,5.2 Grade A, Procedure and Sequence:5.2.1 HardeningThe plates shall be heated to a tempera-ture within the range from 1575 to 1675F 855 to 915C, heldwithin that temperature range for a minimum of 1
13、h/in. 2.4min/mm of thickness, but in no case less than 15 min, and thenwater-quenched to below 300F 150C.5.2.2 Intermediate Heat TreatmentThe plates shall bereheated to a temperature within the range from 1275 to1400F 690 to 760C, held within that temperature range for1This specification is under th
14、e jurisdiction of ASTM Committee A01 on Steel,Stainless Steel and Related Alloys and is the direct responsibility of SubcommitteeA01.11 on Steel Plates for Boilers and Pressure Vessels.Current edition approved Oct. 1, 2010. Published November 2010. Originallyapproved in 1971. Last previous edition a
15、pproved in 2005 as A645/A645M 05.DOI: 10.1520/A0645_A0645M-10.2For ASME Boiler and Pressure Vessel Code applications see related Specifi-cation SA-645 in Section II of that Code.3For referenced ASTM standards, visit the ASTM website, www.astm.org, orcontact ASTM Customer Service at serviceastm.org.
16、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 Box C700, West Conshohocken, PA 19428-2959, United States.a
17、minimum of 1 h/in. 2.4 min/mm of thickness, but in no caseless than 15 min, and then water-quenched to below 300F150C.5.2.3 TemperingThe plates shall be reheated to a tempera-ture within the range from 1150 to 1225F 620 to 665C, heldwithin that temperature range for a minimum of 1 h/in. 2.4min/mm of
18、 thickness, but in no case less than 15 min, and thenwater-quenched or air cooled to below 300F 150C.5.3 Grade B, Procedure and Sequence:5.3.1 HardeningThe plates shall be heated to a tempera-ture within the range from 1470 to 1600F 800 to 870C, heldwithin that temperature range for a sufficient tim
19、e to obtainuniform temperature throughout the plate thickness, and thenquenched in a liquid medium.5.3.2 Intermediate Heat TreatmentThe plates shall bereheated to a temperature within the range from 1200 to1330F 650 to 720C, held within that temperature range fora minimum of 1 h/in. 2.4 min/mm of th
20、ickness, but in no caseless than 15 min, and then water-quenched to below 300F150C for nominal plate thicknesses over58 in. 16 mm, orcooled in air or water-quenched to below 300F 150C fornominal plate thicknesses of58 in. 16 mm and under.5.3.3 TemperingThe plates shall be reheated to a tempera-ture
21、within the range from 1020 to 1150F 550 to 620C, heldwithin that temperature range for a minimum of 30 min/in. 1.2min/mm of thickness, but in no case less than 15 min, and thenwater-quenched to below 300F 150C.6. Chemical Requirements6.1 The steel shall conform to the chemical requirementsgiven in T
22、able 1 unless otherwise modified in accordance withSupplementary Requirement S17, Vacuum Carbon-DeoxidizedSteel, in Specification A20/A20M.7. Mechanical Requirements7.1 Tension TestsThe plates as represented by the tensiontest specimens shall conform to the requirements given inTable 2.7.1.1 For nom
23、inal plate thicknesses of34 in. 20 mm andunder, the 112 in. 40 mm wide rectangular specimen may beused for the tension test, and the elongation may be determinedin a 2 in. 50 mm gage length that includes the fracture andthat shows the greatest elongation.7.2 Impact Tests:7.2.1 Charpy V-notch tests s
24、hall be made in accordance withthe general requirements of Specification A20/A20M.7.2.2 The longitudinal axis of the test specimens shall betransverse to the final direction of rolling of the plate.7.2.3 Unless otherwise agreed, the plates shall be impacttested at the following temperatures:7.2.3.1
25、Grade A: 220F 140C.7.2.3.2 Grade B: 320F 195C.7.2.4 Each specimen shall have a lateral expansion oppositethe notch of not less than 0.015 in. 0.38 mm.7.2.5 The values of energy absorption in foot-pounds-forcejoules and the fracture appearance in percent shear shall berecorded and reported for inform
26、ation.8. Keywords8.1 alloy steel; alloy steel plate; pressure containing parts;pressure vessel steels; steel plates; steel plates for pressurevessel applicationsTABLE 1 Chemical RequirementsElementComposition, %Grade A Grade BCarbon, maxHeat Analysis 0.13 0.13Produce Analysis 0.15 0.15ManganeseHeat
27、Analysis 0.300.60 0.901.50Product Analysis 0.250.66 0.841.59Phosphorus, maxHeat Analysis 0.025 0.020Product Analysis 0.025 0.025Sulfur, maxHeat Analysis 0.025 0.010Product Analysis 0.025 0.015SiliconHeat Analysis 0.200.40 0.150.30AProduct Analysis 0.180.45 0.130.33ANickelHeat Analysis 4.85.2 5.06.0P
28、roduct Analysis 4.75.3 4.96.1ChromiumHeat Analysis . 0.101.00Product Analysis . 0.061.05MolybdenumHeat Analysis 0.200.35 0.100.30Product Analysis 0.170.38 0.090.33Aluminum, totalHeat Analysis 0.020.12 0.020.05Product Analysis 0.010.16 0.0150.06Nitrogen, maxHeat Analysis 0.020 0.010Product Analysis 0
29、.025 0.010AThe specified minimum limit does not apply if the total aluminum is 0.030 % ormore, ore if the acid soluble aluminum content is 0.025 % or more.TABLE 2 Tensile RequirementsGrade A Grade BYield strength, min, ksi MPaA65 450 85 590Tensile strength, ksi MPa 95115 655 to 795 100120 690830Elon
30、gation in 2 in. 50 mm, min, %B20.0 20AAt 0.2 % offset, or, if agreed between the purchaser and the manufacturer, at0.5 % extension under load.BSee Specification A20/A20M for elongation adjustment.A645/A645M 102SUPPLEMENTARY REQUIREMENTSA list of standardized supplementary requirements for use at the
31、 option of the purchaser is includedin Specification A20/A20M. Supplementary requirements shall not apply unless specified in the order.Those which are considered suitable for use with this specification are listed below by title. Othersenumerated in Specification A20/A20M may be used with this spec
32、ification subject to agreement bythe supplier.S1. Vacuum Treatment,S2. Product Analysis,S6. Drop-Weight Test (for Material 0.625 in. 16 mm andover in Thickness),S8. Ultrasonic Examination in accordance with Specifica-tion A435/A435M,S11. Ultrasonic Examination in accordance with Specifica-tion A577/
33、A577M,S12. Ultrasonic Examination in accordance with Specifica-tion A578/A578M, andS17. Vacuum Carbon-Deoxidized Steel.ADDITIONAL SUPPLEMENTARY REQUIREMENTSAlso listed below are additional supplementary requirements which are considered suitablefor use with this specification.S64. Longitudinal Charp
34、y Impact Energy AbsorptionRequirementS64.1 When required, the purchaser may specify longitudi-nal Charpy V-notch impact testing to energy-absorption accep-tance criteria.S64.2 Tests shall be conducted in accordance with thegeneral requirements of Specification A20/A20M.S64.3 The longitudinal Charpy
35、V-notch impact propertiesshall not be less than those shown in Table S1.S64.4 The impact values obtained on subsize specimensshall not be less than the values listed in Table S1.S65. Transverse Charpy Impact Energy AbsorptionRequirementS65.1 When required, the purchaser may specify transverseCharpy
36、V-notch impact testing to energy-absorption accep-tance criteria.S65.2 Tests shall be conducted in accordance with thegeneral requirements of Specification A20/A20M.S65.3 The transverse Charpy V-notch impact propertiesshall not be less than those shown in Table S2.S65.4 The impact values obtained on
37、 subsize specimensshall not be less than the values listed in Table S2.TABLE S1 Charpy Impact Requirements for LongitudinalSpecimensSize of Specimen,mmCharpy V-notchImpact ValueRequired forAcceptance(Average ofThree Specimens),ftlbf JMinimumCharpy V-notchImpact ValueWithout RequiringRetest (OneSpeci
38、men Onlyof a Set),ftlbf J10 by 10 25 34 20 2710 by 7.5 19 26 16 2210 by 6.67 17 23 13 1810 by 5.0 13 18 10 1410 by 3.33 8 11 7 1010 by 2.50 6 8 5 7A645/A645M 103SUMMARY OF CHANGESCommittee A01 has identified the location of selected changes to this standard since the last issue(A645/A645M 05) that m
39、ay impact the use of this standard.(1) Deleted 3.5(2) Deleted 3.2 and renumbered the subsequent paragraphs.(3) Revised 3.1, 3.2, and 3.3.(4) Revised the maximum P and S contents for Grade A inTable 1.ASTM International takes no position respecting the validity of any patent rights asserted in connec
40、tion with 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 responsib
41、le technical 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 con
42、sideration 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
43、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 web
44、site(www.astm.org). Permission rights to photocopy the standard may also be secured from the ASTM website (www.astm.org/COPYRIGHT/).TABLE S2 Charpy Impact Requirements for TransverseSpecimensSize of Specimen,mmCharpy V-notchImpact ValueRequired forAcceptance(Average ofThree Specimens),ftlbf JMinimumCharpy V-notchImpact ValueWithout RequiringRetest (OneSpecimen Onlyof a Set),ftlbf J10 by 10 20 27 16 2210 by 7.5 15 20 12 1610 by 6.6 13 18 10 1410 by 5.0 10 14 8 1110 by 3.33 7 10 5 710 by 2.50 5 7 4 5A645/A645M 104
