1、Designation: A 738/A 738M 07Standard Specification forPressure Vessel Plates, Heat-Treated, Carbon-Manganese-Silicon Steel, for Moderate and Lower Temperature Service1This standard is issued under the fixed designationA 738/A 738M; the number immediately following the designation indicates the yearo
2、f 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 (e) indicates an editorial change since the last revision or reapproval.1. Scope*1.1 This specification2covers heat-treated carbon-manganese
3、-silicon steel plates intended for use in weldedpressure vessels at moderate and lower temperature service.1.2 Material under this specification is available in fourstrength levels, 75 ksi 515 MPa, 85 ksi 585 MPa, 80 ksi550 MPa, and 90 ksi 620 MPa minimum ultimate tensilestrengths.1.3 The maximum th
4、ickness of plates is limited only by thecapacity of the chemical composition and heat treatment tomeet the specified mechanical property requirements; however,current practice normally limits the maximum thickness ofplates furnished under this specification to 6 in. 150 mm forGrade A, 4 in. 100 mm f
5、or Grade B, and 6 in. 150 mm forGrade C. For Grades D and E, the maximum permitted nominalthickness is 1.5 in. 40 mm.1.4 Grade A is the material that, prior to 1984, was coveredby Specification A 738 without a grade designation.1.5 The values stated in either SI units or inch-pound unitsare to be re
6、garded separately as standard. The values stated ineach system may not be exact equivalents; therefore, eachsystem shall be used independently of the other. Combiningvalues from the two systems may result in non-conformancewith the standard.2. Referenced Documents2.1 ASTM Standards:3A 20/A 20M Speci
7、fication for General Requirements forSteel Plates for Pressure Vessels3. General Requirements and Ordering Information3.1 Plates supplied to this product specification shall con-form to the requirements of Specification A 20/A 20M, whichoutlines the testing and retesting methods and procedures,permi
8、ssible variations in dimensions and mass, quality, repairof defects, marking, loading, etc.3.2 Specification A 20/A 20M also establishes the rules forcompliance to the ordering information when purchasingmaterial to this specification.3.3 In addition to the basic requirements of this specifica-tion,
9、 certain supplementary requirements are available whenadditional control, testing, or examination is required to meetthe end use requirements.3.4 The purchaser is referred to the listed supplementaryrequirements in this specification and to the supplementaryrequirements in Specification A 20/A 20M.4
10、. Manufacture4.1 Steelmaking PracticeThe steel shall be killed andshall conform to the fine austenitic grain size requirement ofSpecification A 20/A 20M.5. Heat Treatment5.1 Grade A plates 2.5 in. 65 mm and under in thicknessshall be supplied in either the normalized or quenched andtempered conditio
11、n.5.2 Grade A plates over 2.5 in. 65 mm in thickness andGrade B, Grade C, Grade D, and Grade E plates in allthicknesses shall be quenched-and-tempered.5.3 When plates are tempered, the minimum temperingtemperature shall be 1100F 595C.6. Chemical Requirements6.1 The steel shall conform to the chemica
12、l requirementsshown in Table 1 unless otherwise modified in accordance withSupplementary Requirement S 17, Vacuum Carbon-Deoxidized Steel in Specification A 20/A 20M.7. Mechanical Requirements7.1 Tension Test RequirementsThe plates as representedby the tension test specimens shall conform to the req
13、uirementsof Table 2.7.1.1 For nominal plate thicknesses of34 in. 20 mm andunder, the 1.5-in. 40-mm wide rectangular specimen may beused for the tension test and the elongation may be determined1This specification is under the jurisdiction of ASTM Committee A01 on Steel,Stainless Steel and Related Al
14、loys and is the direct responsibility of SubcommitteeA01.11 on Steel Plates for Boilers and Pressure Vessels.Current edition approved Nov. 1, 2007. Published December 2007. Originallyapproved in 1976. Last previous edition approved in 2005 as A 738/A 738M05.2For ASME Boiler and Pressure Vessel Code
15、applications see related Specifi-cation SA-738/SA-738M 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 information, refer to the standards Document Summary pag
16、e 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.TABLE 1 Chemical RequirementsElementComposition, %Grade A Grade B Grade C Grade D Grade ECarbon, m
17、axA0.24 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 max 0.841.62 1.62 max 0.92
18、1.72 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 0.015Sulfur, maxA0.035 0.030 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
19、 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 analysis 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 0.2
20、9 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 0.38Over 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
21、 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 0.10D0.10E0.12 0.13Titanium, maxA. . .FGBoron, maxA. . . 0.0007 0.0007Aluminum, minA. . . 0.020 total or0.015 acidsolubleF0
22、.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 point above the specified maximum formanganese is permitted, up to a maximum of 1.85 % by heat analysis, and 1
23、.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.FBy agreement between the manufacturer and the purchaser, the steel may be produced with titanium, in which ca
24、se 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 product analyses shall be reportedon the test report.GBy agreement between the manufacturer and the purchaser, th
25、e 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 % inclusive and the titanium content for the heat and product analyses shall bereported on the test report.A
26、 738/A 738M 072in a 2-in. 50-mm gage length that includes the fracture andshows the greatest elongation.8. Keywords8.1 pressure-containing parts; pressure vessel steel; steelplates; steel plates for pressure vessel applicationsSUPPLEMENTARY REQUIREMENTSSupplementary requirements shall not apply unle
27、ss specified in the purchase order. A list ofstandardized supplementary requirements for use at the option of the purchaser is included inSpecification A 20/A 20M. Several of those considered suitable for use with this specification arelisted by title. Other tests may be performed by agreement betwe
28、en the supplier and the purchaser:S1. Vacuum TreatmentS2. Product Analysis.S3. Simulated Post-Weld Heat Treatment of MechanicalTest Coupons.S4. Additional Tension Test.S5. Charpy V-Notch Impact Test.S6. Drop Weight Test (for Material 0.625 in. 16 mm andOver in Thickness).S9. Magnetic Particle Examin
29、ation.S12. Ultrasonic Examination in accordance with Specifica-tion A 578/A 578M.S20. Maximum Carbon Equivalent for WeldabilityTABLE 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
30、80100 550690 85105 585724 90110 620760Over 1.5 to 2.5 in.40 to 65 mm, incl7595 515655 85102 585705 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 6
31、0 415 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 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
32、4 in. 100 mm 20 20 20ANot applicable.BSee Specification A 20/A 20M for elongation requirement adjustments.A 738/A 738M 073APPENDIX(Nonmandatory Information)X1. CHARPY V-NOTCH IMPACT TESTX1.1 The energy values below are shown only for infor-mation as to the guarantees that are generally available.Man
33、datory conformance to any of the values listed is a matterof agreement between the purchaser and the manufacturer.X1.1.1 Longitudinal20 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 sin
34、ce the last issue(A 738/A 738M05) that may impact the use of this standard.(1) Removed Supplementary Requirement S17.(2) Added Supplementary Requirement S1.(3) Corrected two missing minus signs in Appendix X1.ASTM International takes no position respecting the validity of any patent rights asserted
35、in connection 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
36、responsible 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 ca
37、reful consideration 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 Internatio
38、nal, 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).A 738/A 738M 074
