1、Designation:A738/A738M07 Designation: A738/A738M 12Standard Specification forPressure Vessel Plates, Heat-Treated, Carbon-Manganese-Silicon Steel, for Moderate and Lower Temperature Service1This standard is issued under the fixed designation A738/A738M; the number immediately following the designati
2、on indicates the 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 specification2covers heat-tre
3、ated carbon-manganese-silicon steel plates intended for use in welded pressure vessels atmoderate and lower temperature service.1.2 Material under this specification is available in four strength levels, 75 ksi 515 MPa, 85 ksi 585 MPa, 80 ksi 550 MPa,and 90 ksi 620 MPa minimum ultimate tensile stren
4、gths.1.3 The maximum thickness of plates is limited only by the capacity of the chemical composition and heat treatment to meetthe specified mechanical property requirements; however, current practice normally limits the maximum thickness of platesfurnished under this specification to 6 in. 150 mm f
5、or Grade A, 4 in. 100 mm for Grade B, and 6 in. 150 mm for Grade C.For Grades D and E, the maximum permitted nominal thickness is 1.5 in. 40 mm.1.4 Grade A is the material that, prior to 1984, was covered by Specification A738 without a grade designation.1.5 The values stated in either SI units or i
6、nch-pound units are to be regarded separately as standard. The values stated in eachsystem may not be exact equivalents; therefore, each system shall be used independently of the other. Combining values from thetwo systems may result in non-conformance with the standard.2. Referenced Documents2.1 AS
7、TM Standards:3A20/A20M Specification for General Requirements for Steel Plates for Pressure Vessels3. General Requirements and Ordering Information3.1Plates supplied to this product specification shall conform to the requirements of Specification3.1 Material supplied to this material specification s
8、hall conform to Specification A20/A20M, which outlines the testing andretesting methods and procedures, permissible variations in dimensions and mass, quality, repair of defects, marking, loading, etc.3.2Specification . These requirements outline the testing and retesting methods and procedures, per
9、mitted variations indimensions, and mass, quality and repair of defects, marking, loading, and ordering information.3.2 In addition to the basic requirements of this specification, certain supplementary requirements are available when additionalcontrol, testing, or examination is required to meet en
10、d use requirements. The purchaser is referred to the listed supplementaryrequirements in this specification and to the detailed requirements in Specification A20/A20Malso establishes the rules forcompliance to the ordering information when purchasing material to this specification.3.3In addition to
11、the basic requirements of this specification, certain supplementary requirements are available when additionalcontrol, testing, or examination is required to meet the end use requirements.3.4The purchaser is referred to the listed supplementary requirements in this specification and to the supplemen
12、tary requirementsin Specification A20/A20M.3.3 If the requirements of this specification are in conflict with the requirements of Specification A20/A20M, the requirementsof this specification shall prevail.4. Manufacture4.1 Steelmaking PracticeThe steel shall be killed and shall conform to the fine
13、austenitic grain size requirement ofSpecification A20/A20M.1This specification is under the jurisdiction ofASTM CommitteeA01 on Steel, Stainless Steel and RelatedAlloys and is the direct responsibility of SubcommitteeA01.11on Steel Plates for Boilers and Pressure Vessels.Current edition approved Nov
14、.May 1, 2007.2012. Published December 2007.June 2012. Originally approved in 1976. Last previous edition approved in 20052007 asA738/A738M 057. DOI: 10.1520/A0738_A0738M-0712.2For ASME Boiler and Pressure Vessel Code applications see related Specification SA-738/SA-738M in Section II of that Code.3F
15、or 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 ASTM website.1This document is not an ASTM standard and is intended only to p
16、rovide 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 consult prior editions as appropriate. In all cases only the current versionof t
17、he standard as published by ASTM is to be considered the official document.*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.5. Heat Treatment5.1 Grade A plates 2.5 in. 6
18、5 mm and under in thickness shall be supplied in either the normalized or quenched and temperedcondition.5.2 Grade A plates over 2.5 in. 65 mm in thickness and Grade B, Grade C, Grade D, and Grade E plates in all thicknessesshall be quenched-and-tempered.5.3 When plates are tempered, the minimum tem
19、pering temperature shall be 1100F 595C.6. Chemical Requirements6.1 The steel shall conform to the chemical requirements shown in Table 1 unless otherwise modified in accordance withSupplementary Requirement S 17, Vacuum Carbon-Deoxidized Steel in Specification A20/A20M.7. Mechanical Requirements7.1
20、Tension Test RequirementsThe plates as represented by the tension test specimens shall conform to the requirements ofTable 2.7.1.1 For nominal plate thicknesses of34 in. 20 mm and under, the 1.5-in. 40-mm wide rectangular specimen may be usedfor the tension test and the elongation may be determined
21、in a 2-in. 50-mm gage length that includes the fracture and shows thegreatest elongation.8. Keywords8.1 pressure-containing parts; pressure vessel steel; steel plates; steel plates for pressure vessel applicationsA738/A738M 122TABLE 1 Chemical RequirementsElementComposition, %Grade A Grade B Grade C
22、 Grade D Grade ECarbon, maxA0.24 0.20 0.20 0.10 0.12BManganese:Heat analysis1.5 in. 40 mm and under 1.50 max 0.901.50 1.50 max 1.001.60 1.101.60BOver 1.5 to 2.5 in.40 to 65 mm, incl1.50 max 0.901.50 1.50 maxCCOver 2.5 in. 65 mm 1.60 max 0.901.60 1.60 maxProduct analysis1.5 in. 40 mm and under 1.62 m
23、ax 0.841.62 1.62 max 0.921.72 1.021.72BOver 1.5 to 2.5 in.40 to 65 mm, incl1.62 max 0.841.62 1.62 maxCCOver 2.5 in. 65 mm 1.72 max 0.841.72 1.72 maxPhosphorus, maxA0.035 0.030 0.025 0.015 0.015Phosphorus, maxA0.025 0.025 0.025 0.015 0.015Sulfur, maxA0.035 0.030 0.025 0.006 0.006Sulfur, maxA0.025 0.0
24、25 0.025 0.006 0.006Silicon:Heat analysis 0.150.50 0.150.55 0.150.50 0.150.50 0.150.50Product analysis 0.130.55 0.130.60 0.130.55 0.130.55 0.130.55Copper, max:Heat analysis 0.35 0.35 0.35 0.35 0.35Product analysis 0.38 0.38 0.38 0.38 0.38Nickel, max:Heat analysis 0.50 0.60 0.50 0.60 0.70Product anal
25、ysis 0.53 0.63 0.53 0.63 0.73Chromium, max:Heat analysis 0.25 0.30 0.25 0.25 0.30Product analysis 0.29 0.34 0.29 0.29 0.34Molybdenum, max:Heat analysis1.5 in. 40 mm and under 0.08 0.20 0.08 0.30 0.35Over 1.5 in. 40 mm 0.08 0.30 0.08CCProduct analysis1.5 in. 40 mm and under 0.09 0.21 0.09 0.33 0.38Ov
26、er 1.5 in. 40 mm 0.09 0.33 0.09CCVanadium, max:Heat analysis 0.07D0.07 0.05 0.08 0.09Product analysis 0.08D0.08 0.05 0.09 0.10Columbium, max:Heat analysis 0.04D0.04E0.05 0.05Product analysis 0.05D0.05E0.06 0.06Columbium plus Vanadium,max:Heat analysis 0.08D0.08E0.11 0.12Product analysis 0.10D0.10E0.
27、12 0.13Titanium, maxA. . .FGBoron, maxA. . . 0.0007 0.0007Aluminum, minA. . . 0.020 total or0.015 acidsolubleF0.020 total or0.015 acidsolubleGAApplies to both heat and product analyses.BFor each reduction of 0.01 percentage point below the specified maximum for carbon, an increase of 0.06 percentage
28、 point above the specified maximum formanganese is permitted, up to a maximum of 1.85 % by heat analysis, and 1.99 % by product analysis.CNot applicable.DVanadium and columbium may be added only by agreement between the manufacturer and the purchaser.EFor Grade C, columbium is an unspecified element
29、.FBy agreement between the manufacturer and the purchaser, the steel may be produced with titanium, in which case the minimum aluminum content shall not apply.If this option is exercised, the titanium content, by heat analysis, shall be 0.006 % to 0.03 %, and the titanium content for the heat and pr
30、oduct analyses shall be reportedon the test report.GBy agreement between the manufacturer and the purchaser, the steel may be produced with titanium, in which case the minimum aluminum content shall not apply.If this option is exercised, the titanium content, by heat analysis, shall be 0.006 % to 0.
31、03 % inclusive and the titanium content for the heat and product analyses shall bereported on the test report.A738/A738M 123SUPPLEMENTARY REQUIREMENTSSupplementary requirements shall not apply unless specified in the purchase order. A list ofstandardized supplementary requirements for use at the opt
32、ion of the purchaser is included inSpecificationA20/A20M. Several of those considered suitable for use with this specification are listedby title. Other tests may be performed by agreement between the supplier and the purchaser:S1. Vacuum TreatmentS2. Product Analysis.S3. Simulated Post-Weld Heat Tr
33、eatment of Mechanical Test Coupons.S4. Additional Tension Test.S5. Charpy V-Notch Impact Test.S6. Drop Weight Test (for Material 0.625 in. 16 mm and Over in Thickness).S9. Magnetic Particle Examination.S12. Ultrasonic Examination in accordance with Specification A578/A578M.S20. Maximum Carbon Equiva
34、lent for WeldabilityAPPENDIX(Nonmandatory Information)X1. CHARPY V-NOTCH IMPACT TESTX1.1 The energy values below are shown only for information as to the guarantees that are generally available. Mandatoryconformance to any of the values listed is a matter of agreement between the purchaser and the m
35、anufacturer.X1.1.1 LongitudinalTABLE 2 Tensile RequirementsNOTEt = plate nominal thickness.Grade A Grade B Grade C Grade D Grade ETensile strength, ksi MPa1.5 in. 40 mm and under 7595 515655 85102 585705 80100 550690 85105 585724 90110 620760Over 1.5 to 2.5 in.40 to 65 mm, incl7595 515655 85102 5857
36、05 80100 550690AAOver 2.5 to 4 in.65 to 100 mm, incl7595 515655 85102 585705 7595 515655Over 4 in. 100 mm 7595 515655 85102 585705 7090 485620AAYield strength, min, ksi MPa1.5 in. 40 mm and under 45 310 60 415 60 415 70 485 75 515Over 1.5 to 2.5 in.40 to 65 mm, incl45 310 60 415 60 415AAOver 2.5 to
37、4 in.65 to 100 mm, incl45 310 60 415 55 380Over 4 in. 100 mm 45 310 60 415 46 315AAElongation in 2 in. 50 mm,min, %B1.5 in. 40 mm and under 20 20 22 20 20Over 1.5 to 4 in.40 to 100 mm, incl20 20 22AAOver 4 in. 100 mm 20 20 20ANot applicable.BSee Specification A20/A20M for elongation requirement adju
38、stments.A738/A738M 12420 ftlbf 27 J at 50F 45C.X1.1.2 Transverse20 ftlbf 27 J at 20F 30C.SUMMARY OF CHANGESCommittee A01 has identified the location of selected changes to this standard since the last issue(A738/A738M 057) that may impact the use of this standard. (Approved May 1, 2012.)(1)Removed S
39、upplementary Requirement S17. ) Table 1 was revised.(2)Added Supplementary Requirement S1.(3)Corrected two missing minus signs in Appendix X1. ) Section 3 was editorially revised.ASTM International takes no position respecting the validity of any patent rights asserted in connection with any item me
40、ntionedin 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 responsible technical committe
41、e 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 consideration at a meeti
42、ng 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 Barr Harbor Drive, PO
43、 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 ASTM website (www.astm.org/COPYRIGHT/).A738/A738M 125
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