1、Designation: A738/A738M 12A738/A738M 12aStandard 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 designation indicate
2、s 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 specification2 covers heat-treated carbo
3、n-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 strengths.1.3 T
4、he maximum thickness of plates for Grades A, B, and C is limited only by the capacity of the chemical composition andheat treatment to meet the specified mechanical property requirements; however, current practice normally limits the maximumthickness of plates furnished under this specification to 6
5、 in. 150 mm for Grade A, 4 in. 100 mm for Grade B, and 6 in. 150mm for Grade C. For Grades D and E, the The maximum permitted nominal thickness is 1.5 in. 40 mm.mm for Grade D and2 in. 50 mm for Grade E.1.4 Grade A is the material that, prior to 1984, was covered by Specification A738 without a grad
6、e designation.1.4 The values stated in either SI units or inch-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-
7、conformance with the standard.2. Referenced Documents2.1 ASTM Standards:3A20/A20M Specification for General Requirements for Steel Plates for Pressure Vessels3. General Requirements and Ordering Information3.1 Material supplied to this material specification shall conform to Specification A20/A20M.
8、These requirements outline thetesting and retesting methods and procedures, permitted variations in dimensions, 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 a
9、vailable when additionalcontrol, testing, or examination is required to meet end use requirements. The purchaser is referred to the listed supplementaryrequirements in this specification and to the detailed requirements in Specification A20/A20M.3.3 If the requirements of this specification are in c
10、onflict 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 austenitic grain size requirement ofSpecification A20/A20M.1 This specification is under the juri
11、sdiction ofASTM Committee A01 on Steel, Stainless Steel and RelatedAlloys and is the direct responsibility of Subcommittee A01.11on Steel Plates for Boilers and Pressure Vessels.Current edition approved May 1, 2012Nov. 1, 2012. Published June 2012January 2013. Originally approved in 1976. Last previ
12、ous edition approved in 20072012 asA738/A738M 07.A738/A738M 12. DOI: 10.1520/A0738_A0738M-12.10.1520/A0738_A0738M-12A.2 For ASME Boiler and Pressure Vessel Code applications see related Specification SA-738/SA-738M in Section II of that Code.3 For referencedASTM standards, visit theASTM website, www
13、.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.This document is not an ASTM standard and is intended only to provide the user of an ASTM standard an indication of wha
14、t 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 the standard as published by ASTM is to be considered the
15、 official document.*A Summary of Changes section appears at the end of this standardCopyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States15. Heat Treatment5.1 GradeAplates 2.5 in. 65 mm and under in thickness shall be supplied in either the
16、 normalized condition or in the quenchedand tempered condition. condition at the option of the manufacturer.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
17、tempering 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
18、.1 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 of 34 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 determi
19、ned 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 12a2TABLE 1 Chemical RequirementsElement Composition, %Grade A Grade B G
20、rade C Grade D Grade ECarbon, maxA 0.24 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 2.0 in.40 to 50 mm1.50 max 0.901.50 1.50 max C 1.101.60BOver 1.5 to 2.5 in.40 to 65 mm, incl1.50 max 0.901.50 1.50 max C COver 2.0 to 2.
21、5 in.50 to 65 mm, incl1.50 max 0.901.50 1.50 max C COver 2.5 in. 65 mm 1.60 max 0.901.60 1.60 max C CProduct analysis1.5 in. 40 mm and under 1.62 max 0.841.62 1.62 max 0.921.72 1.021.72BOver 1.5 to 2.0 in.40 to 50 mm, incl1.62 max 0.841.62 1.62 max C 1.021.72BOver 1.5 to 2.5 in.40 to 65 mm, incl1.62
22、 max 0.841.62 1.62 max C COver 2.0 to 2.5 in.50 to 65 mm, incl1.62 max 0.841.62 1.62 max C COver 2.5 in. 65 mm 1.72 max 0.841.72 1.72 max C CPhosphorus, maxA 0.025 0.025 0.025 0.015 0.015Sulfur, maxA 0.025 0.025 0.025 0.006 0.006Silicon:Heat analysis 0.150.50 0.150.55 0.150.50 0.150.50 0.150.50Produ
23、ct 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 analysis 0.53 0.63 0.53 0.63 0.73Chromium, max:Heat analysis 0.25 0.30 0.25 0.25 0.30Product an
24、alysis 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 0.08 C CProduct 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 0.09 C CVanadium, max:Heat analysis 0.07D 0.07 0.05 0.08 0.09P
25、roduct analysis 0.08D 0.08 0.05 0.09 0.10Columbium, max:Heat analysis 0.04D 0.04 E 0.05 0.05Product analysis 0.05D 0.05 E 0.06 0.06Columbium plus Vanadium,max:Heat analysis 0.08D 0.08 E 0.11 0.12Product analysis 0.10D 0.10 E 0.12 0.13Titanium, maxA . . . F GBoron, maxA . . . 0.0007 0.0007Aluminum, m
26、inA . . . 0.020 total or0.015 acidsolubleF0.020 total or0.015 acidsolubleGA Applies to both heat and product analyses.B For each reduction of 0.01 percentage point below the specified maximum for carbon, an increase of 0.06 percentage point above the specified maximum for manganeseis permitted, up t
27、o a maximum of 1.85 % by heat analysis, and 1.99 % by product analysis.C Not applicable.D Vanadium and columbium may be added only by agreement between the manufacturer and the purchaser.E For Grade C, columbium is an unspecified element.A738/A738M 12a3F By agreement between the manufacturer and the
28、 purchaser, the steel may be produced with titanium, in which case the minimum aluminum content shall not apply. Ifthis 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 rep
29、ort.G By agreement between the manufacturer and the purchaser, the steel may be produced with titanium, in which case the minimum aluminum content shall not apply. Ifthis option is exercised, the titanium content, by heat analysis, shall be 0.006 % to 0.03 % inclusive and the titanium content for th
30、e heat and product analyses shall bereported on the test report.TABLE 2 Tensile RequirementsNOTE 1t = plate nominal thickness.Grade A Grade B Grade C Grade D Grade ETensile strength, ksi MPa1.5 in. 40 mm and under 7595 515655 85102585705801005506908510558572490110620760Over 1.5 to 2.5 in.40 to 65 mm
31、, incl7595 515655 8510258570580100550690A AOver 1.5 to 2.0 in.40 to 50 mm, incl7595 515655 8510258570580100550690A 90110620760Over 2.0 to 2.5 in.50 to 65 mm7595 515655 8510258570580100550690A AOver 2.5 to 4 in.65 to 100 mm, incl7595 515655 851025857057595 515655 A AOver 4 in. 100 mm 7595 515655 8510
32、25857057090 485620 A AYield strength, min, ksi MPa1.5 in. 40 mm and under 45 310 60 415 60 415 70 485 75 515Over 1.5 to 2.0 in.40 to 50 mm, incl45 310 60 415 60 415 A 75 515Over 1.5 to 2.5 in.40 to 65 mm, incl45 310 60 415 60 415 A AOver 2.0 to 2.5 in.50 to 65 mm, incl45 310 60 415 60 415 A AOver 2.
33、5 to 4 in.65 to 100 mm, incl45 310 60 415 55 380 A AOver 4 in. 100 mm 45 310 60 415 46 315 A AElongation 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 22 A AOver 4 in. 100 mm 20 20 20 A AA Not applicable.B See Specification A20/A20M for elongati
34、on requirement adjustments.A738/A738M 12a4SUPPLEMENTARY REQUIREMENTSSupplementary requirements shall not apply unless specified in the purchase order. A list ofstandardized supplementary requirements for use at the option of the purchaser is included inSpecification A20/A20M. Several of those consid
35、ered 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 Treatment of Mechanical Test Coupons.S4. Additional Tension Test.S5. Charpy V-Notch
36、 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 Equivalent for WeldabilityAPPENDIX(Nonmandatory Information)X1. CHARPY V-NOTCH IMPACT T
37、ESTX1.1 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 manufacturer.X1.1.1 Longitudinal20 ftlbf 27 J at 50F 45C.X1.1.2 Transverse20 ftlbf
38、 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 12) that may impact the use of this standard. (Approved Nov. 1, 2012.)(1) 1.3 and 5.1 were revised.(2) Table 1 and Table 2 were revised.SUMMARY OF CHANGES
39、Committee A01 has identified the location of selected changes to this standard since the last issue(A738/A738M 07) that may impact the use of this standard. (Approved May 1, 2012.)(1) Table 1 was revised.(2) Section 3 was editorially revised.A738/A738M 12a5ASTM International takes no position respec
40、ting the validity of any patent rights asserted 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 sta
41、ndard is subject to revision at any time by the 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 Internatio
42、nal Headquarters. Your comments will receive careful 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.
43、This standard is copyrighted by ASTM International, 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 ASTM website (www.astm.org/COPYRIGHT/).A738/A738M 12a6
