1、Designation: A841/A841M 03a (Reapproved 2007)A841/A841M 13Standard Specification forSteel Plates for Pressure Vessels, Produced by Thermo-Mechanical Control Process (TMCP)1This standard is issued under the fixed designation A841/A841M; the number immediately following the designation indicates the y
2、earof 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 Scope*1.1 This specification2 covers steel plates produc
3、ed by the thermo-mechanical control process (TMCP). The plates are intendedprimarily for use in welded pressure vessels. A description of the TMCP method is given in Appendix X1.1.2 The TMCPmethod consists of rolling-reduction and cooling rate controls that result in mechanical properties in the fin
4、ishedplate that are equivalent to those attained using conventional rolling and heat treating processes, which entail reheating afterrolling. A description of the TMCP method is given in Appendix X1.1.2 Due to the inherent characteristics of the TMCP method, the plates cannot be formed at elevated t
5、emperatures withoutsustaining significant losses in strength and toughness. The Except for Grade G, the plates may be formed and post-weldheat-treated at temperatures not exceeding 1200F 650C, providing the requirements of 6.1 are met. Grade G plates may beformed at temperatures not exceeding 985F 5
6、30C provided the requirements of 6.1 are met.1.3 The maximum permitted nominal thickness of plates furnished to this specification is 4 in. 100 mm for Grades A, B, andC; and 1.5 in. 40 mm for Grades D,3 E, and F.F; and 2 in. 50 mm for Grade G.1.4 Grade G is susceptible to magnetization. Use of magne
7、ts in handling after heat treatment should be avoided if residualmagnetism would be detrimental to subsequent fabrication or service.1.5 The values stated in either inch-pound units or SI units are to be regarded separately as standard. Within the text, the SI unitsare shown in brackets. The values
8、stated in each system are not exact equivalents. Therefore, each system must be usedindependently of the other. Combining values from the two systems may result in nonconformance with this specification.2. Referenced Documents2.1 ASTM Standards:4A20/A20M Specification for General Requirements for St
9、eel Plates for Pressure VesselsA435/A435M Specification for Straight-Beam Ultrasonic Examination of Steel PlatesA577/A577M Specification for Ultrasonic Angle-Beam Examination of Steel PlatesA578/A578M Specification for Straight-Beam Ultrasonic Examination of Rolled Steel Plates for Special Applicati
10、ons3. General Requirements and Ordering Information3.1 Plates supplied to this product specification shall conform to Specification A20/A20M, which outlines the testing andretesting methods and procedures, permissible variations in dimensions, quality and repair of defects, marking, loading, etc.3.2
11、 Specification A20/A20M also establishes the rules for ordering information that should be complied with when purchasingplates to this specification.1 This specification is under the jurisdiction ofASTM Committee A01 on Steel, Stainless Steel and RelatedAlloys and is the direct responsibility of Sub
12、committee A01.11on Steel Plates for Boilers and Pressure Vessels.Current edition approved Nov. 1, 2007Oct. 1, 2013. Published March 2008November 2013. Originally approved in 1985. Last previous edition approved in 20032007 asA841/A841M 03a.A841/A841M 03a (2007). DOI: 10.1520/A0841_A0841M-03AR07.10.1
13、520/A0841_A0841M-13.2 For ASME Boiler and Pressure Vessel Code applications, see related Specification SA-841/SA-841M in Section II of that Code.3 ExxonMobil Upstream Research Company has patents pending concerning the use of chemistry ranges in ASTM A841 Grade D, in combination with specific TMCPro
14、utes and/or specific microstructural features. Interested parties are invited to submit information regarding identification of alternatives to these patented items to ASTMInternational Headquarters. Your comments will receive careful consideration at a meeting of the responsible technical committee
15、,1 which you may attend.4 For 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.This document is not an ASTM standard
16、 and is intended only to provide 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 on
17、ly the current versionof the standard as published by ASTM is to be considered the 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 States13.2.1 If the plates
18、are to be subjected to warm forming or post-weld heat treatment, the order must indicate the temperaturesand times-at-temperature that will be utilized in such operations. (See 6.1 and Specification A20/A20M, SupplementaryRequirement S3.)3.3 In addition to the basic requirements of this specificatio
19、n, certain supplementary requirements are available when additionalcontrol, testing, or examination is required to meet end use requirements. These include:3.3.1 Vacuum treatment,3.3.2 Additional or special tension testing,3.3.3 Additional or special impact testing, and3.3.4 Nondestructive examinati
20、on.3.4 The purchaser is referred to the listed supplementary requirements in this specification and to the detailed requirements inSpecification A20/A20M.3.5 If the requirements of this specification are in conflict with the requirements of Specification A20/A20M, the requirementsof this specificati
21、on shall prevail.4. Manufacture4.1 Steelmaking PracticeThe steel shall be killed and shall conform to the fine austenitic grain size requirement ofSpecification A20/A20M.4.2 The plates shall be produced by the thermo-mechanical control process.5. Chemical Composition5.1 The chemical composition on h
22、eat analysis shall conform to the requirements given in Table 1, except as otherwise providedin Supplementary Requirement S17 of Specification A20/A20M when that requirement is involved.5.2 If a product analysis is made on a sample taken from the standard location (see Specification A20/A20M), the r
23、esults of theanalysis shall not deviate from the limits for the heat analysis by more than the values given in Table 2.6. Mechanical Requirements6.1 If the plates are to be subjected to warm forming or post-weld heat treatment, the test coupons shall be subjected to heattreatment to simulate such fa
24、brication operations. (See 3.2.1 and Specification A20/A20M, Supplementary Requirement S3.)6.2 Tension Test RequirementsThe plates as represented by the tension-test specimens shall conform to the requirements givenin Table 3.6.2.1 Number and Location of Test CouponsTwo tension tests shall be made f
25、rom each plate-as-rolled. One test coupon shallbe taken from a corner of the plate on each end.6.3 Notch Toughness Test Requirements:6.3.1 Longitudinal Except for Grade G, longitudinal Charpy V-notch tests shall be made in accordance with SpecificationA20/A20M.6.3.2 For Grades A, B and C, unless the
26、 test temperature and absorbed energy requirements are specified in the purchase order,the tests shall be conducted at 40F 40C and the average absorbed energy for each set of three full size specimens shall be15 ftlb 20J or more.6.3.3 For Grade D, unless the test temperature and the lateral expansio
27、n requirements are specified in the purchase order, thetests shall be conducted at 40F 40C and the lateral expansion for each specimen shall be 0.015 in. 0.4 mm or more.6.3.4 For Grades E and F, unless the test temperature and absorbed energy requirements are specified in the purchase order, thetest
28、s shall be conducted at 40F 40C and the average absorbed energy for each set of three full size specimens shall be 20ftlb 27 J or more.6.3.5 For Grade G, transverse Charpy V-notch tests shall be made in accordance with Specification A20/A20M. Unless the testtemperature is specified in the purchase o
29、rder, the tests shall be conducted at 320F 195C. Each specimen shall have a lateralexpansion opposite the notch of not less than 0.015 in. 0.38 mm, up to a plate thickness of 1.25 in. 31.75 mm inclusive; and0.019 in. 0.48 mm at a plate thickness of 2.0 in. 50 mm.Values of lateral expansion for plate
30、 thicknesses between 1.25 in. 31.75mm and 2.0 in. 50 mm shall be determined by linear interpolation.7. Marking7.1 In addition to the marking required in Specification A20/A20M, each plate shall be legibly stamped with the letters “TMC”following the stamped specification designation.8. Keywords8.1 pr
31、essure containing parts; pressure vessel steel; steel plates; steel plates for pressure vessel applicationsA841/A841M 132TABLE 1 Chemical RequirementsElement Composition, %Grade A Grade B Grade C Grade D Grade E Grade FCarbon, max 0.20 0.15 0.10 0.09 0.07 0.10AManganeset # 1.5 in. 40 mm 0.701.35B 0.
32、701.35B 0.701.60 1.002.00 0.701.60 1.101.70At 1.5 in. 40 mm 1.001.60 1.001.60 1.001.60 C C CPhosphorus, max 0.030 0.030 0.030 0.010 0.015 0.020Sulfur, max 0.030 0.025 0.015 0.005 0.005 0.008Silicon 0.150.50 0.150.50 0.150.50 0.050.25 0.050.30 0.100.45Copper, max 0.35 0.35 0.35 0.50 0.35 0.40Nickel 0
33、.25 max 0.60 max 0.25 max 1.05.0 0.60 max 0.85 maxChromium, max 0.25 0.25 0.25 0.30 0.30 0.30Molybdenum, max 0.08 0.30 0.08 0.40 0.30 0.50Columbium, max 0.03 0.03 0.06 0.05 0.08 0.10Vanadium, max 0.06 0.06 0.06 0.02 0.06 0.09Titanium D D 0.0060.02 0.0060.03 D EBoron . . . 0.00050.002 0.0007 max 0.00
34、07 maxAluminum, min 0.020 total or 0.020 total or . . 0.020 total or 0.020 total or0.015 acidsolubleD0.015 acidsolubleD0.015 acidsolubleD0.015 acidsolubleETABLE 1 Chemical RequirementsAElement Composition, %Grade A Grade B Grade C Grade D Grade E Grade F Grade GCarbon 0.20 0.15 0.10 0.09 0.07 0.10B
35、0.13Manganeset # 1.5 in. 40 mm 0.701.35C 0.701.35C 0.701.60 1.002.00 0.701.60 1.101.70B 0.601.20t 1.5 in. 40 mm 1.001.60 1.001.60 1.001.60 D D D 0.601.20Phosphorus 0.030 0.030 0.030 0.010 0.015 0.020 0.015Sulfur 0.030 0.025 0.015 0.005 0.005 0.008 0.015Silicon 0.150.50 0.150.50 0.150.50 0.050.25 0.0
36、50.30 0.100.45 0.040.15ECopper 0.35 0.35 0.35 0.50 0.35 0.40 . . .Nickel 0.25 0.60 0.25 1.05.0 0.60 0.85 6.07.5Chromium 0.25 0.25 0.25 0.30 0.30 0.30 0.301.00Molybdenum 0.08 0.30 0.08 0.40 0.30 0.50 0.30Columbium 0.03 0.03 0.06 0.05 0.08 0.10 . . .Vanadium 0.06 0.06 0.06 0.02 0.06 0.09 . . .Titanium
37、 F F 0.0060.02 0.0060.03 F G . . .Boron . . . 0.00050.002 0.0007 0.0007 . . .Aluminum, min 0.020 total or 0.020 total or . . 0.020 total or 0.020 total or E0.015 acidsolubleF0.015 acidsolubleF0.015 acidsolubleF0.015 acidsolubleG0.008 acid solubleA Values are maximums unless a minimum or a range is i
38、ndicated. Where ellipses appear in this table, there is no requirement.B For each reduction of 0.01 percentage point below the specified maximum for carbon, an increase of 0.06 percentage points above the specified maximum for manganese is permitted, up to a maximum of 1.85 %.C Manganese may exceed
39、1.35 % on heat analysis, up to a maximum of 1.60 %, provided that the carbon equivalent on heat analysis does not exceed 0.47 %, or the value specified in Supplementary Requirement S77when that requirement is invoked, when based on the following formula:CE5C1Mn/61sCr1Mo1Vd/51sNi1Cud/15%When this opt
40、ion is exercised, the manganese content on product analysis shall not exceed the heat analysis content by more than 0.12 percentage points.D Not applicable.E Silicon may be less than 0.04 %, provided that total aluminum is 0.030 % or over, or provided acid soluble aluminum is 0.025 % or over.F By ag
41、reement, the steel may be produced with titanium, in which case the minimum aluminum content shall not apply. When this option is exercised, the titanium content, by heat analysis, shall be 0.006 % to 0.02 %,and the actual titanium content shall be reported on the test report.G By agreement, the ste
42、el may be produced with titanium, in which case the minimum aluminum content shall not apply. When this option is exercised, the titanium content, by heat analysis, shall be 0.006 % to 0.03 %,and the actual titanium content shall be reported on the test report.A841/A841M133TABLE 2 Product Analysis T
43、olerancesElement Specified Limit, %Tolerances, %UnderMinimumLimitOverMaximumLimitCarbon to 0.15, incl 0.02 0.03over 0.15 0.03 0.04Manganese to 0.60, incl 0.05 0.06over 0.60 to 0.90, incl 0.06 0.08over 0.90 to 1.20, incl 0.08 0.10over 1.20 to 1.35, incl 0.09 0.11over 1.35 to 1.65, incl 0.09 0.12over
44、1.65 0.11 0.14Phosphorus to 0.020, incl . 0.005over 0.020 . 0.010Sulfur to 0.020, incl . 0.005over 0.020 . 0.010Silicon to 0.30, incl 0.02 0.03over 0.30 to 0.40, incl 0.05 0.05over 0.40 0.06 0.06Nickel to 1.00, incl 0.03 0.03over 1.0 to 2.0, incl 0.05 0.05over 2.0 to 3.8, incl 0.07 0.07over 3.8 0.08
45、 0.08Chromium to 0.90, incl 0.04 0.04Molybdenum to 0.20, incl 0.01 0.01over 0.20 0.03 0.03Copper to 1.00, incl 0.03 0.03Vanadium to 0.10, incl 0.01 0.01Columbium to 0.10, incl 0.01 0.01Aluminum to 0.15, incl 0.005 0.01Titanium to 0.010, incl 0.002 0.01over 0.010 0.01 0.01Boron any A AA Product analy
46、sis is not applicable for this element.A841/A841M 134TABLE 3 Tensile RequirementsGrades A, B, and C Grade D Grade E Grade FClass 1 Class 2 Class 3 Class 4 Class 5 Class 6 Class 7 Class 8Yield strength, min, ksiMPato 1.5 in. 40 mm incl 50 345 60 415 100 690 70 485 75 515 70 485 75 515 80 550over 1.5
47、in. 40 mm to2.5 in. to 65 mm 50 345 60 415 A A A A A Aover 2.5 in. over 65mm 45 310 55 380 A A A A A ATensile strength, ksiMPato 1.5 in. 40 mm incl 709048562080100550690145170100011708410458071588108605745821025657058610659073090110620760over 1.5 in. 40 mm to2.5 in. to 65 mm709048562080100550690 A A
48、 A A A Aover 2.5 in. over 65mm65854505857595515655 A A A A A AElongation in 2 in. 50mm,min, %Bto 1.5 in. 40 mm incl 22 22 13 20 19 20 19 18over 1.5 in. 40 mm to2.5 in. to 65 mm 22 22 A A A A A Aover 2.5 in. over 65mm 22 22 A A A A A AElongation in 8 in. 200mm, min, %Bto 1.5 in. 40 mm incl 18 . . 16
49、15 16 15 14over 1.5 in. 40 mm to2.5 in. to 65 mm 18 A A A A A Aover 2.5 in. over 65mm 18 . A A A A A ATABLE 3 Tensile RequirementsGrades A, B, and C Grade D Grade E Grade F Grade GClass 1 Class 2 Class 3 Class 4 Class 5 Class 6 Class 7 Class 8 Class 9 Class 10Yield strength, min, ksiMPato 1.5 in. 40 mm incl 50 345 60 415 100 690 70 485 75 515
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