1、Designation: A 803/A 803M 03Standard Specification forWelded Ferritic Stainless Steel Feedwater Heater Tubes1This standard is issued under the fixed designation A 803/A 803M; the number immediately following the designation indicates the yearof original adoption or, in the case of revision, the year
2、 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. Scope*1.1 This specification covers welded ferritic stainless steelfeedwater heater tubes including those bent, if specifi
3、ed, intothe form of U-tubes for application in tubular feedwaterheaters.1.2 The tubing sizes covered shall be58 to 1 in. 15.9 to 25.4mm inclusive, in outside diameter, and average or minimumwall thicknesses of 0.028 in. 0.7 mm and heavier.1.3 The values stated in either inch-pound units or SI unitsa
4、re 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 system mustbe used independently of the other. Combining values from thetwo systems may result in nonconformance with the specifi-c
5、ation. The inch-pound units shall apply unless the “M”designation of this specification is specified in the order.2. Referenced Documents2.1 ASTM Standards:A 480/A 480M Specification for General Requirements forFlat-Rolled Stainless and Heat Resisting Steel Plate, Sheet,and Strip2A 763 Practices for
6、 Detecting Susceptibility to Intergranu-lar Attack in Ferritic Stainless Steels2A 941 Terminology Relating to Steel, Stainless Steel, Re-lated Alloys, and Ferroalloys3A 1016/A 1016M Specification for General Requirementsfor Ferritic Alloy Steel, Austenitic Alloy Steel, and Stain-less Steel Tubes33.
7、Terminology3.1 DefinitionsFor definitions of terms used in this speci-fication, refer to Terminology A 941.4. Ordering Information4.1 It is the responsibility of the purchaser to specify allrequirements that are necessary for material under this speci-fication. Such requirements may include, but are
8、 not limited to,the following:4.1.1 Quantity (length or number of pieces),4.1.2 Material description,4.1.3 Dimensions (outside diameter, wall thickness (mini-mum or average wall), and length),4.1.4 Grade (chemical composition) (Table 1), and4.1.5 U-bend requirements, if order specifies bending,U-ben
9、d schedules or drawings shall accompany the order.4.2 Optional RequirementsPurchaser shall specifywhether annealing of the U-bends is required or whether tubesare to be hydrotested or air-tested (see 10.5).4.3 Supplementary RequirementsPurchaser shall specifyon this purchase order if material is to
10、be eddy-current tested inaccordance with Supplementary Requirement S1 or S2, and ifspecial test reports are required, under Supplementary Require-ment S3, and,4.4 Any special requirements.5. General Requirements5.1 Material furnished to this specification shall conform tothe applicable requirements
11、of the latest published edition ofSpecification A 1016/A 1016M unless otherwise providedherein.6. Materials and Manufacture6.1 The tube shall be made from flat-rolled steel by anautomatic welding process with no addition of filler metal.6.2 Surface contaminants may have detrimental effects onhigh te
12、mperature properties or corrosion resistance of tubing.Contamination by copper, lead, mercury, zinc, chlorides, orsulfur may be detrimental to stainless steels. The manufacturershall employ techniques which minimize surface contamina-tion by these elements.1This specification is under the jurisdicti
13、on of ASTM Committee A01 on Steel,Stainless Steel and Related Alloys and is the direct responsibility of SubcommitteeA01.10 on Stainless and Alloy Steel Tubular Products.Current edition approved Sept. 10, 2003. Published October 2003. Originallyapproved in 1982. Last previous edition approved in 200
14、2 as A 803/A 803M 02.2Annual Book of ASTM Standards, Vol 01.03.3Annual Book of ASTM Standards, Vol 01.01.1*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.7. Cleaning Be
15、fore Annealing7.1 All lubricants or coatings used in the manufacture ofstraight-length tube or in the bending shall be removed from allsurfaces prior to any annealing treatments. U-bends on whicha lubricant had been applied to the inside surface duringbending shall have the cleanness of their inside
16、 surfaceconfirmed by blowing close-fitting acetone-soaked felt plugsthrough 10 % of the tubes of each bend radius. Dry, oil-free airor inert gas shall be used to blow the plugs through the tubes.If the plugs blown through any tube show more than a lightgray discoloration, all tubes that have had a l
17、ubricant applied tothe inside surface during bending shall be recleaned. Afterrecleaning 10 % of the tubes of each bend radius whose insidesurface had been subjected to bending, lubricants shall beretested.8. Heat Treatment8.1 All finished straight tubing or straight tubing ready forU-bending shall
18、be furnished in the solution-annealed condi-tion. The annealing procedure shall consist of heating thematerial to a temperature of 1200F 650C or higher andcooling (as appropriate for the grade) to meet the requirementsof this specification.8.2 If heat treatment of U-bends is specified, it shall sati
19、sfythe annealing procedure described in 8.1 and shall be done asfollows:8.2.1 The heat treatment shall be applied to the U-bend areaplus approximately 6 in. 150 mm of each leg beyond thetangent point of the U-bend.8.2.2 If the heat treatment specified in 8.2 is accomplishedby resistance-heating meth
20、ods wherein electrodes are clampedto the tubes, the clamped areas shall be visually examined forarc burns. Burn indications shall be cause for rejection unlessthey can be removed by local polishing without encroachingupon minimum wall thickness.8.2.3 Temperature control shall be accomplished through
21、the use of optical or emission pyrometers, or both. Notemperature-indicating crayons, lacquers, or pellets shall beused.8.2.4 The inside of the tube shall be purged with a protectiveor an inert gas atmosphere during heating and cooling to below700F 370C to prevent scaling of the inside surface. Thea
22、tmosphere should be noncarburizing.9. Chemical Composition9.1 Product Analysis:9.1.1 The steel shall conform to the chemical compositionin Table 1.9.1.2 When specified on the purchase order, a productanalysis shall be supplied from one tube or coil of steel perheat. The product analysis tolerance of
23、 Specification A 480/A 480M shall apply.9.1.3 If the original test for product analysis fails, retests oftwo additional lengths of flat-rolled stock or tubes shall bemade. Both retests, for the elements in question, shall meet therequirements of this specification; otherwise all remainingmaterial in
24、 the heat or lot (see Note 1) shall be rejected or, atthe option of the producer, each length of flat-rolled stock ortube may be individually tested for acceptance. Lengths offlat-rolled stock or tubes that do not meet the requirements ofthis specification shall be rejected.NOTE 1For product analyse
25、s and flange requirements, the term “lot”applies to 125 tube groupings, prior to cutting to length, of the samenominal size and wall thickness, produced from the same heat of steel andannealed in a continuous furnace.TABLE 1 Chemical RequirementsGrade UNSS 40900TP409UNS S 43035TP439UNSS 44627TP XM-2
26、7UNS S 44626TP XM-33UNS S 4463525-4-4UNS S 4466026-3-3UNSS 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.
27、025 0.025 0.040 0.040S, max 0.030 0.030 0.02 0.020 0.030 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 1
28、7.519.5 28.030.011.7Mo . . . . . . 0.751.50 0.751.50 3.54.5 3.04.0 3.54.2 3.54.2 1.752.50 3.64.2Al . . . 0.15 max . . . . . . . . . . . . . . . . . . . . . . . .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.
29、035 max 0.045 maxmaxCmaxCTi 6 3 Cmin; 0.75max0.20+4(C+N) min; 1.10max. 73 (C+N)butno less 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
30、.20 . . . . . . . . . . . . . . . . . . . . .AFor small diameter or thin walls, or both, tubing, 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
31、those less than 0.049 in. 1.2 mm in average wall thickness (0.040 in. 1mm in minimum wall thickness).BNickel + copper.CCarbon + nitrogen = 0.025 max.A 803/A 803M 03210. Mechanical Requirements10.1 Tensile Properties:10.1.1 The material shall conform to the tensile propertiesshown in Table 2.10.1.2 O
32、ne tension test shall be made on a specimen for lotsof not more than 50 tubes. Tension tests shall be made onspecimens from two tubes for lots of more than 50 tubes (Note2).10.1.3 Table 3 gives the computed minimum elongationvalues for each132 in. 0.8 mm decrease in wall thickness.10.2 Hardness:10.2
33、.1 The tubes shall have a hardness number not to exceedthose prescribed in Table 4. This hardness requirement is not toapply to the bend area of U-bend tubes which are not heattreated after bending.10.2.2 Brinell or Rockwell hardness tests shall be made onspecimens from two tubes from each lot (see
34、Note 2).NOTE 2For tension, hardness, and corrosion test requirements, theterm “lot” applies to all tubes prior to cutting to length, of the samenominal diameter and wall thickness, produced from the same heat of steeland annealed in a continuous furnace at the same temperature, time atheat, and furn
35、ace speed.10.3 Reverse Flattening TestOne reverse flattening testshall be made on a specimen from each 1500 ft 460 m offinished tubing.10.4 Flange TestFlange tests shall be made on specimensfrom each end of one finished tube, not the one used for theflattening test, from each lot (see Note 1).10.5 P
36、ressure TestEach straight tube, or each U-tube aftercompletion of the bending and post-bending heat treatment,shall be pressure-tested in accordance with one of the follow-ing paragraphs as specified by the purchaser:10.5.1 Hydrostatic TestEach tube shall be given an inter-nal hydrostatic test in ac
37、cordance with Specification A 1016/A 1016M.10.5.2 Air Underwater TestEach tube shall be air under-water tested in accordance with Specification A 1016/A 1016M.11. Corrosion Resisting Properties11.1 One full section sample 1 in. 25 mm long from thecenter of a sample tube of the smallest radius bend t
38、hat is heattreated shall be tested in the heat treated condition in accor-dance with the appropriate practice in Practices A 763 for thespecified grade, or as agreed upon for TP409.11.2 One full-section sample 1 in. 25 mm long from eachlot (Note 2) of straight tubes shall be tested in the finishedco
39、ndition in accordance with the appropriate practice inPractices A 763 for the specified grade, or as agreed upon forTP409.11.3 The appearance of any fissures or cracks in the testspecimen, when evaluated in accordance with the EvaluationSections of Practices A 763 indicating the presence of inter-gr
40、anular attack, shall be cause for rejection of that lot.12. Permissible Variations in Dimensions (Fig. 1)12.1 Permissible variations from the specified outside diam-eter shall be in accordance with Specification A 1016/TABLE 2 Tensile RequirementsGradeTensile Strength,min, ksi MPaYield Strength,min,
41、 ksi MPaElongationAin 2 in.or 50 mm,min, %TP 409 55 380 30 205 20TP 439 60 415 30 205 20TP XM-27 65 450 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
42、, a deduction of 0.90 % for 29-4C and 1 % for allother grades shall be made from the basic minimum elongation for each132 in. 0.8mm decrease in wall thickness below516 in. 8 mm. Table 3 gives the computedminimum values.TABLE 3 Minimum Elongation ValuesAWall ThicknessBElongation in 2 in. or 50 mm,min
43、, %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, ex
44、cl 0.6 to 0.4 10 11ACalculation elongation shall be rounded to the nearest whole number.BWhere the wall thickness lies between two values shown above, the minimumelongation value shall be determined by the following equation:Grade Equation29-4C E = 28.8t + 9.00E = 1.13t + 9.00All other E = 32t + 10.
45、00E = 1.25t + 10.00where:E = elongation in 2 in. or 50mm, %, andt = actual thickness of specimen, in. mm.TABLE 4 Hardness RequirementsGradeBrinell Hardness,maxRockwell Hardness,B Scale,maxTP 409 207 95TP 439 207 95P XM-27 241 100TP XM-33 241 10025-4-4 270 27A26-3-3 265 25A29-4 241 10029-4-2 241 1001
46、8-2 217 9529-4C 241 100ARockwell Hardness, C scale.A 803/A 803M 033A 1016M. Those tolerances do not apply to the bent portion ofthe U-tubes. At the bent portion of a U-tube for R =23 D orgreater, neither the major nor minor diameter of the tube shalldeviate from the nominal diameter prior to bending
47、 by morethan 10 %. If less than 2 3 D is specified, tolerances could begreater.12.2 Permissible Variations from the Specified Wall Thick-ness:12.2.1 Permissible variations from the specified minimumwall thickness shall not exceed +20 0 %.12.2.2 Permissible variations from the specified averagewall t
48、hickness are 610 % of the nominal wall thickness.12.2.3 The wall thickness of the tube in the U-bent sectionshall not be less than value determined by the equation:tf54RT4R 1 Dwhere:tf= wall thickness after bending, in. mm,T = specified minimum tube wall thickness, in. mm,R = centerline bend radius,
49、 in. mm, andD = nominal outside tube diameter, in. mm.12.3 Permissible Variations from the Specified Length:12.3.1 Straight LengthsThe maximum permissible varia-tions for lengths 24 ft 7.3 m and shorter shall be +18 in. +3mm, 0; for lengths longer than 24 ft 7.3 m, an additionalover tolerance of +18 in. +3 mm for each 10 ft 3 m, orfraction thereof, shall be permitted up to a maximum of +12 in.+13 mm.12.3.2 U-BendsIn the case of U-t
