1、Designation:A803/A803M11 Designation: A803/A803M 12Standard Specification forSeamless and Welded Ferritic Stainless Steel FeedwaterHeater Tubes1This standard is issued under the fixed designation A803/A803M; the number immediately following the designation indicates the yearof original adoption or,
2、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 specification covers seamless and welded ferritic stainless steel feedwater
3、 heater tubes including those bent, ifspecified, into the form of U-tubes for application in tubular feedwater heaters.1.2 The tubing sizes covered shall be58 to 1 in. 15.9 to 25.4 mm inclusive, in inclusive outside diameter, and average orminimum wall thicknesses of 0.028 in. 0.7 mm and heavier.1.3
4、 The values stated in either SI units or inch-pound units are to be regarded separately as standard. Within the text, the SI unitsare shown in brackets. The values stated in each system may not be exact equivalents; therefore, each system shall be usedindependently of the other. Combining values fro
5、m the two systems may result in non-conformance with the specification. Theinch-pound units shall apply unless the “M” designation of this specification is specified in the order. standard.2. Referenced Documents2.1 ASTM Standards:2A480/A480M Specification for General Requirements for Flat-Rolled St
6、ainless and Heat-Resisting Steel Plate, Sheet, and StripA763 Practices for Detecting Susceptibility to Intergranular Attack in Ferritic Stainless SteelsA941 Terminology Relating to Steel, Stainless Steel, Related Alloys, and FerroalloysA1016/A1016M Specification for General Requirements for Ferritic
7、 Alloy Steel, Austenitic Alloy Steel, and Stainless SteelTubes3. Terminology3.1 DefinitionsFor definitions of terms used in this specification, refer to Terminology A941.4. Ordering Information4.1 It is the responsibility of the purchaser to specify all requirements that are necessary for material u
8、nder this specification.Such requirements may include, but are not limited to, the following:4.1.1 Quantity (length or number of pieces),4.1.2Material description,4.1.2 Material description (seamless or welded),4.1.3 Dimensions (outside diameter, wall thickness (minimum or average wall), and length)
9、,4.1.4 Grade (chemical composition) (Table 1), and4.1.5 U-bend requirements, if order specifies bending, U-bend schedules or drawings shall accompany the order.4.2 Optional RequirementsPurchaser shall specify whether annealing of the U-bends is required or whether tubes are to behydrotested or air-t
10、ested (see 10.510.6).4.3 Supplementary RequirementsPurchaser shall specify on this purchase order if material is to be eddy-current tested inaccordance with Supplementary Requirement S1 or S2, and if special test reports are required, under Supplementary RequirementS3, and,4.4 Any additional special
11、 requirements.5. General Requirements5.1 Material furnished to this specification shall conform to the applicable requirements of the latest published edition of1This specification is under the jurisdiction ofASTM CommitteeA01 on Steel, Stainless Steel and RelatedAlloys and is the direct responsibil
12、ity of SubcommitteeA01.10on Stainless and Alloy Steel Tubular Products .Current edition approved AprilMarch 1, 2011.2012. Published April 2011.2012. Originally approved in 1982. Last previous edition approved in 20102011 asA803/A803M101. DOI: 10.1520/A0803_A0803M-112.2For referencedASTM standards, v
13、isit 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.1This document is not an ASTM standard and is intended only to provide the user of an ASTM sta
14、ndard 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 only the current versionof the standard as published by AS
15、TM is to be considered the official document.*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.Specification A1016/A1016M unless otherwise provided herein.6. Materials an
16、d Manufacture6.1The tube shall be made from flat-rolled steel by an automatic welding process with no addition of filler metal.6.2Surface contaminants may have detrimental effects on high temperature properties or corrosion resistance of tubing.Contamination by copper, lead, mercury, zinc, chlorides
17、, or sulfur may be detrimental to stainless steels. The manufacturer shallemploy techniques which minimize surface contamination by these elements.6.1 The tubing shall be manufactured by either the seamless or welded process.6.2 Seamless Tubing:6.2.1 Seamless tubing shall be supplied from a cold fin
18、ish process. Hot finishing as the final sizing process is not allowed.6.3 Welded Tubing:6.3.1 The tube shall be made from flat-rolled steel by an automatic welding process with no addition of filler metal.6.4 Surface contaminants may have detrimental effects on high temperature properties or corrosi
19、on resistance of tubing.Contamination by copper, lead, mercury, zinc, chlorides, or sulfur may be detrimental to stainless steels. The manufacturer shallemploy techniques which minimize surface contamination by these elements.7. Cleaning Before Annealing7.1 All lubricants or coatings used in the man
20、ufacture of straight-length tube or in the bending shall be removed from allsurfaces prior to any annealing treatments. U-bends on which a lubricant had been applied to the inside surface during bendingshall have the cleanness of their inside surface confirmed by blowing close-fitting acetone-soaked
21、 felt plugs through 10 % of thetubes of each bend radius. Dry, oil-free air or inert gas shall be used to blow the plugs through the tubes. If the plugs blown throughany tube show more than a light gray discoloration, all tubes that have had a lubricant applied to the inside surface during bendingsh
22、all be recleaned. After recleaning 10 % of the tubes of each bend radius whose inside surface had been subjected to bending,lubricants shall be retested.8. Heat Treatment8.1 All finished straight tubing or straight tubing ready for U-bending shall be furnished in the solution-annealed condition. The
23、annealing procedure shall consist of heating the material to a temperature of 1200F 650C or higher and cooling (as appropriatefor the grade) to meet the requirements of this specification.8.2 If heat treatment of U-bends is specified, it shall satisfy the annealing procedure described in 8.1 and sha
24、ll be done asfollows:8.2.1 The heat treatment shall be applied to the U-bend area plus approximately 6 in. 150 mm of each leg beyond the tangentpoint of the U-bend.TABLE 1 Chemical RequirementsGrade UNSS 40900TP409UNS S 43035TP439UNSS 44627TP XM-27UNS S 44626TP XM-33UNS S 4463525-4-4UNS S 4466026-3-
25、3UNSS 4470029-4UNSS 4480029-4-2UNS S 4440018-2UNS S 4473529-4CElement Composition, %C, max 0.08 0.07 0.01A0.06 0.025 0.030 0.010 0.010 0.025 0.030Mn, max 1.00 1.00 0.40 0.75 1.00 1.00 0.30 0.30 1.00 1.00P, max 0.045 0.040 0.02 0.040 0.040 0.040 0.025 0.025 0.040 0.040S, max 0.030 0.030 0.02 0.020 0.
26、030 0.030 0.020 0.020 0.030 0.030Si, max 1.00 1.00 0.40 0.75 0.75 1.00 0.20 0.20 1.00 1.00Ni 0.50 max 0.50 max 0.5Bmax 0.50 max 3.54.5 1.03.5 0.15 max 2.02.5 1.00 max 1.00 maxCr 10.5 17.019.0 25.027.5 25.027.0 24.526.0 25.028.0 28.030.0 28.030.0 17.519.5 28.030.011.7Mo . . . . . . 0.751.50 0.751.50
27、3.54.5 3.04.0 3.54.2 3.54.2 1.752.50 3.64.2Al . 0.15max . . . . . . . .Cu . . . . . . 0.20 max 0.20 max . . . . . . 0.15 max 0.15 max . . . . . .N . . . 0.04 max 0.015max0.040 max 0.035 0.040 max 0.020 0.020 0.035 max 0.045 maxmaxCmaxCTi 6 3 Cmin; 0.75max0.20+4(C+N) min; 1.10max. 73 (C+N)butno less
28、than0.20 min;(Ti + Cb) = 0.2+4(C+N)min; 0.80Ti+Cb=63(C + N) but noless than 0.20min;(Ti + Cb) =0.20+4(C+N) min; 0.80Ti+Cb=63(C + N) but noless than 0.20min; 1.00 max1.00 max max 1.00 max maxCb . . . . . . 0.050.20 . . . . . . . . . . . . . . . . . . . . .AFor small diameter or thin walls, or both, t
29、ubing, where many drawing passes are required, a carbon maximum of 0.015 % is necessary. Small outside diameter tubesare defined as those less than 0.500 in. 12.7 mm in outside diameter and light wall tubes as those less than 0.049 in. 1.2 mm in average wall thickness (0.040 in. 1mm in minimum wall
30、thickness).BNickel + copper.CCarbon + nitrogen = 0.025 max.A803/A803M 1228.2.2 If the heat treatment specified in 8.2 is accomplished by resistance-heating methods wherein electrodes are clamped to thetubes, the clamped areas shall be visually examined for arc burns. Burn indications shall be cause
31、for rejection unless they can beremoved by local polishing without encroaching upon minimum wall thickness.8.2.3 Temperature control shall be accomplished through the use of optical or emission pyrometers, or both. No temperature-indicating crayons, lacquers, or pellets shall be used.8.2.4 The insid
32、e of the tube shall be purged with a protective or an inert gas atmosphere during heating and cooling to below700F 370C to prevent scaling of the inside surface. The atmosphere should be noncarburizing.9. Chemical Composition9.1 Product Analysis:9.1.1 The steel shall conform to the chemical composit
33、ion in Table 1.9.1.2 When specified on the purchase order, a product analysis shall be supplied from one tube or coil of steel per heat. Theproduct analysis tolerance of Specification A480/A480M shall apply.9.1.3 If the original test for product analysis fails, retests of two additional lengths of f
34、lat-rolled stock or tubes shall be made.Both retests, for the elements in question, shall meet the requirements of this specification; otherwise all remaining material in theheat or lot shall be rejected or, at the option of the producer, each length of flat-rolled stock or tube may be individually
35、tested foracceptance. Lengths of flat-rolled stock or tubes that do not meet the requirements of this specification shall be rejected.10. Mechanical Requirements10.1 Tensile Properties:10.1.1 The material shall conform to the tensile properties shown in Table 2.10.1.2 One tension test shall be made
36、on a specimen for lots of not more than 50 tubes. Tension tests shall be made on specimensfrom two tubes for lots of more than 50 tubes.10.1.3 Table 3 gives the computed minimum elongation values for each132 in. 0.8 mm decrease in wall thickness.10.2 Hardness:10.2.1 The tubes shall have a hardness n
37、umber not to exceed those prescribed in Table 4. This hardness requirement is not toapply to the bend area of U-bend tubes which are not heat treated after bending.10.2.2 Brinell or Rockwell hardness tests shall be made on specimens from two tubes from each lot.10.3 Reverse Flattening TestReverse Fl
38、attening Test (for Welded Product) One reverse flattening test shall be made on aspecimen from each 1500 ft 460 m of finished tubing.10.4 Flange TestFlangeTest (forWelded Product)Flange tests shall be made on specimens from each end of one finished tube,not the one used for the flattening test, from
39、 each lot.10.510.5 Flaring Test (for Seamless Tubes)One test shall be made on specimens from one end of one tube from each lot of finishedtubes. The minimum expansion of the inside diameter shall be 10 %.10.6 Pressure TestEach straight tube, or each U-tube after completion of the bending and post-be
40、nding heat treatment, shallbe pressure-tested in accordance with one of the following paragraphs as specified by the purchaser:10.5.110.6.1 Hydrostatic TestEach tube shall be given an internal hydrostatic test in accordance with SpecificationA1016/A1016M.10.5.210.6.2 Pneumatic TestEach tube shall be
41、 examined by a pneumatic test (either air underwater or pneumatic leak test) inaccordance with Specification A1016/A1016M.TABLE 2 Tensile RequirementsGradeTensile Strength,min, ksi MPaYield Strength,min, ksi MPaElongationAin2in.or 50 mm,min, %TP 409 55 380 30 205 20TP 439 60 415 30 205 20TP XM-27 65
42、 450 40 275 20TP XM-33 68 470 45 310 2025-4-4 90 620 75 515 2026-3-3 85 585 65 450 2029-4 80 550 60 415 2029-4-2 80 550 60 415 2018-2 60 415 35 240 2029-4C 75 515 60 415 18AFor longitudinal strip tests, a deduction of 0.90 % for 29-4C and 1 % for allother grades shall be made from the basic minimum
43、elongation for each132 in. 0.8mm decrease in wall thickness below516 in. 8 mm. Table 3 gives the computedminimum values.A803/A803M 12310.610.7 Lot Definitions:10.67.1 For flange and flaring test requirements, the term “lot” applies to 125 tube groupings, prior to cutting to length, of thesame nomina
44、l size and wall thickness, produced from the same heat of steel and annealed in a continuous furnace.10.67.2 For tension and hardness requirements, the term “lot” applies to all tubes, prior to cutting to length, of the same nominaldiameter and wall thickness, produced from the same heat of steel an
45、d annealed in a continuous furnace at the same temperature,time at temperature, and furnace speed.11. Corrosion Resisting Properties11.1 One full section sample 1 in. 25 mm long from the center of a sample tube of the smallest radius bend that is heat treatedshall be tested in the heat treated condi
46、tion in accordance with the appropriate practice in Practices A763 for the specified grade,or as agreed upon for TP409.11.2 One full-section sample 1 in. 25 mm long from each lot of straight tubes shall be tested in the finished condition inaccordance with the appropriate practice in Practices A763
47、for the specified grade, or as agreed upon for TP409.11.3 The appearance of any fissures or cracks in the test specimen, when evaluated in accordance with the Evaluation Sectionsof Practices A763 indicating the presence of intergranular attack, shall be cause for rejection of that lot.11.4 For corro
48、sion test requirements, the term “lot” applies to all tubes, prior to cutting to length, of the same nominal diameterand wall thickness, produced from the same heat of steel and annealed in a continuous furnace at the same temperature, time attemperature, and furnace speed.TABLE 3 Minimum Elongation
49、 ValuesAWall ThicknessBElongation in 2 in. or 50 mm,min, %in. mm 29-4C All Other516 (0.312) 8 18 20932 (0.281) 7.2 17 1914 (0.250) 6.4 16 18732 (0.219) 5.6 15 17316 (0.188) 4.8 14 16532 (0.156) 4 13 1518 (0.125) 3.2 13 14332 (0.094) 2.4 12 13116 (0.062) 1.6 11 120.062 to 0.035, excl 1.6 to 0.9 10 120.035 to 0.022, excl 0.9 to 0.6 10 110.022 to 0.015, excl 0.6 to 0.4 10 11ACalculation elongation shall be rounded to the nearest whole number.BWhere the wall thicknes
