1、Designation: A645/A645M 10 (Reapproved 2016)Standard 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 adopti
2、on 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 specially heat treated 5 % and512 % nickel alloy
3、 steel plates intended 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 susceptibl
4、e to magnetization. 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
5、 shown in brackets. 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 conce
6、rns, if any, associated 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 Requi
7、rements for SteelPlates 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 Speci
8、al Applica-tions3. 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 ofde
9、fects, marking, loading, and ordering information.3.2 In addition to the basic requirements of thisspecification, certain supplementary requirements are availablewhen additional control, testing, or examination is required tomeet end use requirements. The purchaser is referred to thelisted supplemen
10、tary requirements in this specification and tothe detailed 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 Steelm
11、aking PracticeThe 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,
12、including heads 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
13、a minimum of 1 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 to1This specification is under the jurisdiction of ASTM Committee A01 on St
14、eel,Stainless Steel and Related Alloys and is the direct responsibility of SubcommitteeA01.11 on Steel Plates for Boilers and Pressure Vessels.Current edition approved March 1, 2016. Published March 2016. Originallyapproved in 1971. Last previous edition approved in 2010 as A645/A645M 10.DOI: 10.152
15、0/A0645_A0645M-10R16.2For 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. For Annual Book of ASTMStandards volume i
16、nformation, refer to the standards Document Summary page onthe ASTM website.Copyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States11400F 690 to 760C, held within that temperature range fora minimum of 1 h/in. 2.4 min/mm of thickness, but in
17、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 thickness, but in no case less than 15 min, and th
18、enwater-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 time to obtainuniform temperature throughout the plate
19、 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 thickness, but in no caseless than 15 min, and then w
20、ater-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 within the range from 1020 to 1150F 550 to 620C, he
21、ldwithin 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 Table 1 unless otherwise modified in accordance with
22、Supplementary 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 nominal plate thicknesses of34 in. 20 mm andunder, the
23、 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 shall be made in accordance withthe general requirem
24、ents 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 Grade A: 220F 140C.7.2.3.2 Grade B: 320F 195C.7.2.4
25、 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 information.8. Keywords8.1 alloy steel; alloy steel plate
26、; 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 Analysis 0.300.60 0.901.50Product Analysis 0.250.66
27、 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 5.06.0Product Analysis 4.75.3 4.96.1ChromiumHeat Analysis
28、. 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 0.025 0.010AThe specified minimum limit does not app
29、ly 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 to795100120690830Elongation in 2 in. 50 mm,min, %B20.0 20AAt 0.2 % offset,
30、or, if agreed between the purchaser and the manufacturer, at 0.5% extension under load.BSee Specification A20/A20M for elongation adjustment.A645/A645M 10 (2016)2SUPPLEMENTARY REQUIREMENTSA list of standardized supplementary requirements for use at the option of the purchaser is includedin Specifica
31、tion 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 specification subject to agreement bythe supplier.S1
32、. 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/A577M,S12. Ultrasonic Examination in accordance
33、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 Charpy Impact Energy Absorption Re-quirementS64.1 Whe
34、n 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 V-notch impact propertiesshall not be less tha
35、n those shown in Table S1.1.S64.4 The impact values obtained on subsize specimensshall not be less than the values listed in Table S1.1.S65. Transverse Charpy Impact Energy Absorption Re-quirementS65.1 When required, the purchaser may specify transverseCharpy V-notch impact testing to energy-absorpt
36、ion 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 S2.1.S65.4 The impact values obtained on subsize specimensshall not be less th
37、an the values listed in Table S2.1.TABLE S1.1 Charpy Impact Requirements for LongitudinalSpecimensSize of Specimen,mmCharpy V-notchImpact ValueRequired forAcceptance(Average ofThree Specimens),ftlbf JMinimumCharpy V-notchImpact ValueWithout RequiringRetest (OneSpecimen Onlyof a Set),ftlbf J10 by 10
38、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 7TABLE S2.1 Charpy Impact Requirements for TransverseSpecimensSize of Specimen,mmCharpy V-notchImpact ValueRequired forAcceptance(Average ofThree Specimens),ftlbf JMinimumCharpy V-notchImp
39、act 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 10 (2016)3ASTM International takes no position respecting the validity of any patent rights asserted in
40、 connection with any item mentioned inthis 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 re
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43、l, 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). Permission rights to photocopy the standard may also be secured from the Copyright Clearance Center, 222Rosewood Drive, Danvers, MA 01923, Tel: (978) 646-2600; http:/ 10 (2016)4
