1、Designation: A 203/A 203M 97 (Reapproved 2007)Standard Specification forPressure Vessel Plates, Alloy Steel, Nickel1This standard is issued under the fixed designation A 203/A 203M; the number immediately following the designation indicates the yearof original adoption or, in the case of revision, t
2、he 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.This standard has been approved for use by agencies of the Department of Defense.1. Scope1.1 This specification2covers
3、 nickel-alloy steel plates in-tended primarily for welded pressure vessels.1.2 Plates under this specification are available with fourstrength levels and two nickel compositions as follows:GradeNominal NickelContent %Yield Strength, min,ksi MPaTensile Strength,min, ksi MPaA 2.25 37 255 65 450B 2.25
4、40 275 70 485D 3.50 37 255 65 450E 3.50 40 275 70 485F 3.502 in. 50 mm and under 55 380 80 550 ccccOver 2 in. 50 mm 50 345 75 5151.3 The maximum thickness of plates is limited only by thecapacity of the composition to meet the specified mechanicalproperty requirements. However, current practice norm
5、allylimits the maximum thickness of plates furnished under thisspecification as follows:Grade Maximum Thickness, in. mmA 6 150B 6 150D 4 100E 4 100F 4 1001.4 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 b
6、rackets. 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 this specifi-cation.2. Referenced Documents2.1 ASTM Standards:3A 20/A 20M Specification for Genera
7、l Requirements forSteel Plates for Pressure VesselsA 435/A 435M Specification for Straight-Beam UltrasonicExamination of Steel PlatesA 577/A 577M Specification for Ultrasonic Angle-BeamExamination of Steel PlatesA 578/A 578M Specification for Straight-Beam UltrasonicExamination of Rolled Steel Plate
8、s for Special Applica-tions3. General Requirements and Ordering Information3.1 Material supplied to this material specification shallconform to Specification A 20/A 20M. These requirementsoutline the testing and retesting methods and procedures,permissible variations in dimensions and mass, quality
9、andrepair of imperfections, marking, loading, etc.3.2 Specification A 20/A 20M also establishes the rules forthe basis of purchase that should be complied with whenpurchasing material to this specification.3.3 In addition to the basic requirements of this specifica-tion, certain supplementary requir
10、ements are available whenadditional control, testing, or examination is required to meetend use requirements. These include:3.3.1 Vacuum treatment,3.3.2 Additional or special tension testing,3.3.3 Impact testing, and3.3.4 Nondestructive examination.3.4 The purchaser is referred to the listed supplem
11、entaryrequirements in this specification and to the detailed require-ments in Specification A 20/A 20M.1This specification is under the jurisdiction of ASTM Committee A01 on Steel,Stainless Steel and Related Alloys and is the direct responsibility of SubcommitteeA01.11 on Steel Plates for Boilers an
12、d Pressure Vessels.Current edition approved Nov. 1, 2007. Published March 2008. Originallyapproved in 1937. Last previous edition approved in 2003 as A 203/A 203M 97 (2003).2For ASME Boiler and Pressure Vessel Code applications, see related Specifi-cation SA-203/SA-203M in Section II of that Code.3F
13、or 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 page onthe ASTM website.1Copyright ASTM International, 100 Barr Harbor Drive, PO Box C7
14、00, West Conshohocken, PA 19428-2959, United States.3.5 If the requirements of this specification are in conflictwith the requirements of Specification A 20/A 20M, the re-quirements of this specification shall prevail.4. Materials and Manufacture4.1 Steelmaking PracticeThe steel shall be killed ands
15、hall conform to the fine grain size requirement of Specifica-tion A 20/A 20M.5. Heat Treatment5.1 All plates shall be thermally treated as follows:5.1.1 All plates of Grades A, B, D, and E shall be normal-ized except as permitted by 5.1.1.1.5.1.1.1 If approved by the purchaser for GradesA, B, D, and
16、E, cooling rates faster than air cooling are permissible forimprovement of the toughness, provided the plates are subse-quently tempered at not less than 1100F 595C for not lessthan12 h.5.1.2 All plates of Grade F shall be heat treated by heatinginto the austenitic range, quenching in water, and tem
17、pering atnot less than 1100F 595C for not less than12 h.6. Chemical Composition6.1 The steel shall conform to the chemical requirementsshown in Table 1 unless otherwise modified in accordance withSupplementary Requirement S17, Vacuum Carbon-DeoxidizedSteel, in Specification A 20/A 20M.7. Mechanical
18、Properties7.1 Tension Test RequirementsThe material as representedby the tension test specimens shall conform to the requirementsshown in Table 2.7.1.1 For plates that have been heat treated in accordancewith 5.1.1.1 or 5.1.2 and have a nominal thickness of34 in. 20mm and under, the 112-in. (40-mm)
19、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. When thisspecimen is used, the elongation shall be not less than 23 %.7.2 Impact Test Requirements:7.2.1 Pla
20、tes of Grades A, B, D, and E that have been heattreated in accordance with 5.1.1.1 shall be Charpy V-notchimpact tested. The impact test shall meet 20 ft lbf 27 J. Thetest temperature and orientation shall be a matter of agreementbetween the purchaser and supplier.7.2.2 Grade F plates shall be impac
21、t tested in accordancewith Supplementary Requirement S5 in Specification A 20/A 20M.TABLE 1 Chemical RequirementsElementsComposition, %Grade A Grade B Grade D Grades E and FCarbon, max:AUp to 2 in. 50 mm in thickness 0.17 0.21 0.17 0.20Over 2 in. to 4 in. 100 mm incl. in thickness 0.20 0.24 0.20 0.2
22、3Over 4 in. 100 mm in thickness 0.23 0.25 . .Manganese, max:Heat analysis:2 in. 50 mm and under 0.70 0.70 0.70 0.70Over 2 in. 50 mm 0.80 0.80 0.80 0.80Product analysis:2 in. 50 mm and under 0.78 0.78 0.78 0.78Over 2 in. 50 mm 0.88 0.88 0.88 0.88Phosphorus, maxA0.035 0.035 0.035 0.035Sulfur, maxA0.03
23、5 0.035 0.035 0.035Silicon:Heat analysis 0.150.40 0.150.40 0.150.40 0.150.40Product analysis 0.130.45 0.130.45 0.130.45 0.130.45Nickel:Heat analysis 2.102.50 2.102.50 3.253.75 3.253.75Product analysis 2.032.57 2.032.57 3.183.82 3.183.82AApplies to both heat and product analyses.TABLE 2 Tensile Requi
24、rementsGrades A and D Grades B and E Grade Fksi MPa ksi MPa ksi MPaTensile strength2 in. 50 mm and under 6585 450585 7090 485620 80100 550690Over 2 in. 50 mm 6585 450585 7090 485620 7595 515655Yield strength, min2 in. 50 mm and under 37 255 40 275 55 380Over 2 in. 50 mm 37 255 40 275 50 345Elongatio
25、n in 8 in. 200 mm min, %A19 17 .Elongation in 2 in. 50 mm min, %A,B23 21 20ASee Specification A 20/A 20M for elongation adjustments.BSee 7.1.1.A 203/A 203M 97 (2007)28. Keywords8.1 alloy steel plate; nickel alloy steel; pressure containingparts; pressure vessel steels; steel plates; steel plates for
26、pressure vessel applicationsSUPPLEMENTARY REQUIREMENTSSupplementary requirements shall not apply unless specified in the order.Alist of standardized supplementary requirements for use at the option of the purchaser are includedin Specification A 20/A 20M. Those which are considered suitable for use
27、with this specification arelisted below by title.S1. Vacuum Treatment,S2. Product Analysis,S3. Simulated Post-Weld Heat Treatment of MechanicalTest Coupons,S4.1 Additional Tension Test,S5. Charpy V-Notch Impact Test,S6. Drop Weight Test (for Material 0.625 in. 16 mm andover in Thickness),S7. High-Te
28、mperature Tension Test,S8. Ultrasonic Examination in accordance with Specifica-tion A 435/A 435M,S9. Magnetic Particle Examination,S11. Ultrasonic Examination in accordance with Specifica-tion A 577/A 577M,S12. Ultrasonic Examination in accordance with Specifica-tion A 578/A 578M,S14. Bend Test, and
29、S17. 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. Users of this standard are expressly advised that determination of the validity of any such patent rights, and the ris
30、kof 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 every five years andif not revised, either reapproved or withdrawn. Your comments are invited either for revision of thi
31、s standard or for additional standardsand should be addressed to ASTM International 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
32、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 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 203/A 203M 97 (2007)3
