1、Designation: A 737/A 737M 99 (Reapproved 2004)Standard Specification forPressure Vessel Plates, High-Strength, Low-Alloy Steel1This standard is issued under the fixed designation A 737/A 737M; the number immediately following the designation indicates the yearof original adoption or, in the case of
2、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. Scope1.1 This specification2covers high-strength low-alloy steelplates for service in welded pressure ve
3、ssels and pipingcomponents.1.2 This material is particularly intended for piping andpressure vessel applications where high strength and improvedtoughness are required.1.3 Two grades, designated B and C, are covered by thisspecification. Grade B provides a minimum yield strength of50 ksi 345 MPa. Gr
4、ade C provides a minimum yield strengthof 60 ksi 415 MPa.1.4 The maximum thickness of plates is limited only by thecapacity of the chemical composition and heat treatment tomeet the specified mechanical property requirements. Indi-vidual manufacturers should be consulted on thickness limita-tions si
5、nce current industry limitations have not been ascer-tained to date.1.5 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 brackets. The values stated in eachsystem are not exact equivalents; therefore, each sy
6、stem mustbe used independently of the other. Combining values from thetwo systems may result in noncomformance with the specifi-cation.2. Referenced Documents2.1 ASTM Standards:A 20/A 20M Specification for General Requirements forSteel Plates for Pressure Vessels3A 435/A 435M Specification for Strai
7、ght-Beam UltrasonicExamination of Steel Plates3A 577/A 577M Specification for Ultrasonic Angle-BeamExamination of Steel Plates3A 578/A 578M Specification for Straight-Beam UltrasonicExamination of Plain and Clad Steel Plates for SpecialApplications33. General Requirements and Ordering Information3.1
8、 Material supplied to this specification shall conform tothe requirements of Specification A 20/A 20M. These require-ments outline the testing and retesting methods and procedures,permissible variations in dimensions and mass, quality, repairof defects, marking, loading, etc.3.2 Specification A 20/A
9、 20M also establishes the rules forcompliance to the ordering information when purchasingmaterial to this specification.3.3 Certain supplementary requirements considered suitablefor use with this specification are listed at the end of thespecification. These include some of the standardized supple-m
10、entary requirements listed in Specification A 20/A 20M aswell as additional ones unique to this specification.4. 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 The material sh
11、all be normalized by heating to a suitabletemperature which produces an austenitic structure, but notexceeding 1700F 925C, holding a sufficient time to attainuniform heat throughout the material, and cooling in air.5.2 If approved by the purchaser, cooling rates faster thanair cooling are permitted
12、for improvement of strength ortoughness, provided the plates are subsequently tempered inthe temperature range from 1100 to 1300F 595 to 705C.5.3 If the purchaser elects to perform the required heattreatment, the material shall be accepted on the basis of milltests made from test coupons heat treate
13、d in accordance withthe purchase order requirements. If the test coupon heat-treatment requirements are not indicated on the purchase order,the manufacturer shall heat treat the test coupons underconditions he considers appropriate. The manufacturer shall1This specification is under the jurisdiction
14、 of ASTM Committee A01 on Steel,Stainless Steel and Related Alloys, and is the direct responsibility of SubcommitteeA01.11 on Steel for Boilers and Pressure Vessels.Current edition approved Sept. 1, 2004. Published September 2004. Originallyapproved in 1976. Last previous edition approved in 1999 as
15、 A 737/A 737M 99.2For ASME Boiler and Pressure Vessel Code applications see related Specifi-cation SA-737 in Section II of that code.3Annual Book of ASTM Standards, Vol 01.04.1Copyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.inform the
16、 purchaser of the heat-treatment procedure followedin heat treating the test coupon at the mill.6. Chemical Requirements6.1 The steel shall conform to the requirements as tochemical composition prescribed in Table 1 unless otherwisemodified in accordance with Supplementary Requirement S17,Vacuum Car
17、bon-Deoxidized Steel, in Specification A 20/A 20M.7. Mechanical Requirements7.1 Tension TestsThe material as represented by thetension test specimens shall conform to the requirementsshown in Table 2.7.1.1 For nominal plate thicknesses of34 in. 20 mm andunder, when requirements for elongation in 2 i
18、n. 50 mm areto be determined, the 112-in. 40-mm wide rectangular speci-men may be used for the tension test, and the elongation maybe determined in a 2-in. 50-mm gage length that includes thefracture and that shows the greatest elongation.SUPPLEMENTARY REQUIREMENTSSupplementary requirements shall no
19、t apply unless specified in the purchase order.A list of standardized supplementary requirements for use at the option of the purchaser is includedin Specification A 20/A 20M. Several of those considered suitable for use with this specification arelisted below by title. Other tests may be performed
20、by agreement between the supplier and thepurchaser.S1. Vacuum Treatment,S2. Product Analysis,S3. Simulated Post-Weld Heat Treatment of MechanicalTest Coupons,S5. Charpy V-Notch Impact Tests,S8. Ultrasonic Examination in accordance with Specifica-tion A 435/A 435M,S11. Ultrasonic Examination in accor
21、dance with Specifica-tion A 577/A 577M,S12. Ultrasonic Examination in accordance with Specifica-tion A 578/A 578M, andS17. Vacuum Carbon-Deoxidized Steel.ASTM International takes no position respecting the validity of any patent rights asserted in connection with any item mentionedin this standard.
22、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 committee and must be reviewed ev
23、ery 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 meeting of theresponsible tech
24、nical 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 Box C700, West Conshohoc
25、ken, 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).TABLE 1 Chemical Requiremen
26、tsElementComposition, %Grade B Grade CHeat Product Heat ProductCarbon, max 0.20 0.22 0.22 0.24Manganese 1.151.50A1.071.62A1.151.50 1.071.62Phosphorus, max 0.035 0.035 0.035 0.035Sulfur, max 0.030 0.035 0.030 0.035Silicon 0.150.50 0.100.55 0.150.50 0.100.55Vanadium . . . . . . 0.040.11 0.030.12Columb
27、ium, max 0.05 0.05B.Nitrogen, max . . . . . . 0.03 0.03AThe maximum manganese may be increased to 1.60 % on heat analysis and1.72 % on product analysis, provided that the carbon content on heat analysisdoes not exceed 0.18 %.BColumbium may be present in the amount of 0.05 maximum.TABLE 2 Tensile RequirementsGrade B Grade CYield strength, min, ksi MPa 50 345 60 415Tensile strength, ksi MPa 709048562080100550690Elongation in 8 in. 200 mm,min, %A18 18Elongation in 2 in. 50 mm,min, %A23 23ASee Specification A 20/A 20M for elongation adjustment.A 737/A 737M 99 (2004)2
