1、Designation: A789/A789M 14A789/A789M 16Standard Specification forSeamless and Welded Ferritic/Austenitic Stainless SteelTubing for General Service1This standard is issued under the fixed designation A789/A789M; the number immediately following the designation indicates the yearof original adoption o
2、r, 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 specification2 covers grades of average wall thickness, or, if specified
3、 on the order, minimum wall thickness, ofstainless steel tubing for services requiring general corrosion resistance, with particular emphasis on resistance to stress corrosioncracking. These steels are susceptible to embrittlement if used for prolonged periods at elevated temperatures.1.2 The values
4、 stated in either SI units or inch-pound units are to be regarded separately as standard. The values stated in eachsystem may not be exact equivalents; therefore, each system shall be used independently of the other. Combining values from thetwo systems may result in non-conformance with the standar
5、d. Within the text, the SI units are shown in brackets. The inch-poundunits shall apply unless the M designation of this specification is specified in the order.2. Referenced Documents2.1 ASTM Standards:3A480/A480M Specification for General Requirements for Flat-Rolled Stainless and Heat-Resisting S
6、teel Plate, Sheet, and StripA1016/A1016M Specification for General Requirements for Ferritic Alloy Steel, Austenitic Alloy Steel, and Stainless SteelTubesE527 Practice for Numbering Metals and Alloys in the Unified Numbering System (UNS)2.2 SAE Standard:4SAE J 1086 Practice for Numbering Metals and
7、Alloys (UNS)3. Ordering Information3.1 Orders for product under this specification should include the following, as required, to describe the desired materialadequately:3.1.1 Quantity (feet, metres, or number of lengths),3.1.2 Name of product (seamless or welded tubes),3.1.3 Grade (see Table 1),3.1.
8、4 Size (outside diameter and average wall thickness, unless minimum wall thickness is specified),3.1.5 Length (specific or random),3.1.6 Optional requirements (for product analysis, see Section 8; for hydrostatic or nondestructive electric test, see Section 10),3.1.7 Test report required (see the In
9、spection section of Specification A1016/A1016M),3.1.8 Specification designation, and3.1.9 Special requirements.4. General Requirements4.1 Product furnished under this specification shall conform to the applicable requirements of Specification A1016/A1016M,unless otherwise provided herein.1 This spec
10、ification is under the jurisdiction ofASTM Committee A01 on Steel, Stainless Steel and RelatedAlloys and is the direct responsibility of Subcommittee A01.10on Stainless and Alloy Steel Tubular Products.Current edition approved Oct. 1, 2014March 1, 2016. Published October 2014March 2016. Originally a
11、pproved in 1981. Last previous edition approved in 20132014 asA789/A789MA789/A789M 14.13a1. DOI: 10.1520/A0789_A0789M-14.10.1520/A0789_A0789M-16.2 For ASME Boiler and Pressure Vessel Code applications, see related Specification SA789 in Section II of that Code.3 For referencedASTM standards, visit t
12、heASTM 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.4 Available from Society of Automotive Engineers (SAE), 400 Commonwealth Dr., Warrendale, PA 15096-0
13、001, http:/www.sae.org.This document is not an ASTM standard 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
14、users consult prior editions as appropriate. In all cases only 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 Con
15、shohocken, PA 19428-2959. United States15. Manufacture5.1 The tubes shall be made by the seamless or welded process with no filler metal added.6. Heat Treatment6.1 All tubes shall be furnished in the heat-treated condition in accordance with the procedures shown in Table 2. For seamlesstubes, as an
16、alternate to final heat treatment in a continuous furnace or batch-type furnace, immediately following hot formingwhile the temperature of the tubes is not less than the specified minimum solution treatment temperature, tubes may be individuallyquenched in water or rapidly cooled by other means.7. C
17、hemical Composition7.1 The steel shall conform to the chemical requirements prescribed in Table 1.8. Product Analysis8.1 An analysis of either one billet or one length of flat-rolled stock or one tube shall be made from each heat. The chemicalcomposition thus determined shall conform to the requirem
18、ents specified.8.2 Aproduct analysis tolerance (see the annex table on Chemical Requirements (ProductAnalysis Tolerances) in SpecificationA480/A480M) shall apply. The product analysis tolerance is not applicable to the carbon content for material with a specifiedmaximum carbon of 0.04 % or less.8.3
19、If the original test for product analysis fails, retests of two additional billets, lengths of flat-rolled stock, or tubes shall bemade. Both retests for the elements in question shall meet the requirements of this specification; otherwise, all remaining materialin the heat shall be rejected or, at
20、the option of the producer, each billet or tube may be individually tested for acceptance. Billets,lengths of flat-rolled stock, or tubes that do not meet the requirements of this specification shall be rejected.NOTE 1For flange and flaring requirements, the term lot applies to all tubes prior to cu
21、tting of the same nominal size and wall thickness that areproduced from the same heat of steel. When final heat treatment is in a batch-type furnace, a lot shall include only those tubes of the same size and fromthe same heat that are heat treated in the same furnace charge. When the final heat trea
22、tment is in a continuous furnace, or when heat treated conditionis obtained directly by quenching after hot forming, the number of tubes of the same size and from the same heat in a lot shall be determined from thesize of the tubes as prescribed in Table 3.NOTE 2For tension and hardness test require
23、ments, the term lot applies to all tubes prior to cutting, of the same nominal diameter and wall thicknessthat are produced from the same heat of steel. When final heat treatment is in a batch-type furnace, a lot shall include only those tubes of the same sizeand the same heat that are heat treated
24、in the same furnace charge. When the final heat treatment is in a continuous furnace, or when heat treated conditionis obtained directly by quenching after hot forming, a lot shall include all tubes of the same size and heat, heat treated in the same furnace at the sameTABLE 1 Chemical RequirementsA
25、UNSDesignationB C Mn P S Si Ni Cr Mo N Cu OthersS31200 0.030 2.00 0.045 0.030 1.00 5.56.5 24.026.0 1.202.00 0.140.20 . . . . . .S31260 0.030 1.00 0.030 0.030 0.75 5.57.5 24.026.0 2.53.5 0.100.30 0.200.80 W 0.100.50S31500 0.030 1.202.00 0.030 0.030 1.402.00 4.35.2 18.019.0 2.503.00 0.050.1 . . . . .
26、.S31803 0.030 2.00 0.030 0.020 1.00 4.56.5 21.023.0 2.53.5 0.080.20 . . . . . .S32001 0.030 4.006.00 0.040 0.030 1.00 1.03.0 19.521.5 0.60 0.050.17 1.00 . . .S32003 0.030 2.00 0.030 0.020 1.00 3.0-4.0 19.5-22.5 1.50-2.00 0.14-0.20 . . . . . .S32101 0.040 4.0-6.0 0.040 0.030 1.00 1.35-1.70 21.0-22.0
27、0.10-0.80 0.20-0.25 0.10-0.80 . . .S32202 0.030 2.00 0.040 0.010 1.00 1.002.80 21.524.0 0.45 0.180.26 . . . . . .S32205 0.030 2.00 0.030 0.020 1.00 4.56.5 22.023.0 3.03.5 0.140.20 . . . . . .S32304 0.030 2.50 0.040 0.040 1.00 3.05.5 21.524.5 0.050.60 0.050.20 0.050.60 . . .S32506 0.030 1.00 0.040 0.
28、015 0.90 5.57.2 24.026.0 3.03.5 0.080.20 . . . W 0.050.30S32520 0.030 1.50 0.035 0.020 0.80 5.58.0 23.025.0 3.5. 0.200.35 0.503.00 . . .S32550 0.04 1.50 0.040 0.030 1.00 4.56.5 24.027.0 2.93.9 0.100.25 1.502.50 . . .S32707 0.030 1.50 0.035 0.010 0.50 5.59.5 26.029.0 4.05.0 0.300.50 1.0 max Co 0.52.0
29、S32750C 0.030 1.20 0.035 0.020 0.80 6.08.0 24.026.0 3.05.0 0.240.32 0.50 . . .S32760D 0.030 1.00 0.030 0.010 1.00 6.08.0 24.026.0 3.04.0 0.200.30 0.501.00 W 0.501.00S32808 0.030 1.10 0.030 0.010 0.50 7.08.2 27.027.9 0.801.20 0.300.40 . . . W 2.102.50S32900 0.08 1.00 0.040 0.030 0.75 2.55.0 23.028.0
30、1.002.00 . . . . . . . . .S32906 0.030 0.801.50 0.030 0.030 0.80 5.87.5 28.0 30.0 1.502.60 0.300.40 0.80 . . .S32950 0.030 2.00 0.035 0.010 0.60 3.55.2 26.029.0 1.002.50 0.150.35 . . . . . .S33207 0.030 1.50 0.035 0.010 0.80 6.09.0 29.033.0 3.05.0 0.400.60 1.0 . . .S39274 0.030 1.00 0.030 0.020 0.80
31、 6.08.0 24.026.0 2.53.5 0.240.32 0.200.80 W 1.502.50S39277 0.025 0.80 0.025 0.002 0.80 6.58.0 24.026.0 3.004.00 0.230.33 1.202.00 W 0.801.21S82011 0.030 2.03.0 0.040 0.020 1.00 1.002.00 20.523.5 0.101.00 0.150.27 0.50 . . .S82441 0.030 2.504.00 0.035 0.005 0.70 3.04.5 23.025.0 1.002.00 0.200.30 0.10
32、0.80AMaximum, unless a range or minimum is indicated. Where ellipses (.) appear in this table, there is no minimum and analysis for the element need not be determinedor reported.B Designation established in accordance with Practice E527 and SAE J1086.C % Cr + 3.3 % Mo + 16 % N $ 41.D% Cr + 3.3 % Mo
33、+ 16 % N $ 40.A789/A789M 162temperature, time at heat, and furnace speed, or all tubes of the same size and heat, hot formed and quenched in the same production run.9. Mechanical Tests Required9.1 Tension TestsOne tension test shall be made on a specimen for lots of not more than 50 tubes. Tension t
34、ests shall be madeon specimens from two tubes for lots of more than 50 tubes (see Note 2).9.2 Flaring Test (for Seamless Tubes)One test shall be made on specimens from one end of one tube from each lot (see Note1) of finished tubes. The minimum expansion of the inside diameter shall be 10 %.TABLE 2
35、Heat TreatmentUNS Designation Temperature F C QuenchS31200 1920201010501100rapid cooling in waterS31260 1870201010201100rapid cooling in air or waterS31500 180019009801040rapid cooling in air or waterS31803 1870201010201100rapid cooling in air or waterS32001 180019509821066rapid cooling in air or wa
36、terS32003 1850205010101120rapid cooling in air or waterS32101 1870 1020 min quenched in water or rapidlycooled by other meansS32202 1870197510201080rapid cooling in air or waterS32205 1870201010201100rapid cooling in air or waterS32304 170019209251050rapid cooling in air or waterS32506 1870205010201
37、120rapid cooling in air or waterS32520 1975205010801120rapid cooling in air or waterS32550 19001040 minrapid cooling in air or waterS32707 1975205010801120rapid cooling in air or waterS32750 1880206010251125rapid cooling in air or waterS32760 1960208510701140rapid cooling in air or waterS32808 19202
38、10010501150rapid cooling in air or waterS32900 17001750925955rapid cooling in air or waterS32906 1870210010201150rapid cooling in air or waterS32950 182018809901025air coolS33207 1905208510401140rapid cooling in wateror by other meansS39274 1920206010251125rapid cooling in air or waterS39277 1975215
39、510801180rapid cooling in air or waterS82011 1850205010101120rapid cooling in air or waterS82441 1830 1000 min rapid cooling in air or waterTABLE 3 Number of Tubes in a Lot Heat Treated by theContinuous Process or by Direct Quench after Hot FormingSize of Tube Size of Lot2 in. 50.8 mm and over in ou
40、tside diameterand 0.200 in. 5.1 mm and overin wall thicknessnot more than 50 tubesLess than 2 in. 50.8 mm but over 1 in. 25.4mm in outside diameter or over 1 in.25.4 mm in outside diameter and under0.200 in. 5.1 mm in wall thicknessnot more than 75 tubes1 in. 25.4 mm or less in outside diameter not
41、more than 125 tubesA789/A789M 1639.3 Flange Test (for Welded Tubes)One test shall be made on specimens from one end of one tube from each lot (see Note1) of finished tubes.9.4 Hardness TestBrinell or Rockwell hardness tests shall be made on specimens from two tubes from each lot (see Note 2).9.5 Whe
42、n more than one heat is involved, the tension, flaring, flanging, and hardness test requirements shall apply to each heat.9.6 Reverse Flattening TestFor welded tubes, one reverse flattening test shall be made on a specimen from each 1500 ft 450m of finished tubing.10. Hydrostatic or Nondestructive E
43、lectric Test10.1 Each tube shall be subjected to the nondestructive electric test or the hydrostatic test. The type of test to be used shall beat the option of the manufacturer, unless otherwise specified in the purchase order.10.2 The hydrostatic test shall be in accordance with Specification A1016
44、/A1016M, except that in the calculation of thehydrostatic test pressure 64000(441.2) shall be substituted for 32000(220.6).11. Tensile and Hardness Properties11.1 The material shall conform to the tensile and hardness properties prescribed in Table 4.12. Permissible Variations in Dimensions12.1 Vari
45、ations in outside diameter, wall thickness, and length from those specified shall not exceed the amounts prescribed inTable 5.12.2 The permissible variations in outside diameter given in Table 5 are not sufficient to provide for ovality in thin-walled tubes,as defined in the table. In such tubes, th
46、e maximum and minimum diameters at any cross section shall deviate from the nominaldiameter by no more than twice the permissible variation in outside diameter given in Table 5; however, the mean diameter at thatcross section must still be within the given permissible variation.13. Surface Condition
47、13.1 All tubes shall be free of excessive mill scale, suitable for inspection. A slight amount of oxidation will not be consideredas scale. Any special finish requirements shall be subject to agreement between the manufacturer and the purchaser.14. Product Marking14.1 In addition to the marking pres
48、cribed in Specification A1016/A1016M, the marking shall indicate whether the tubing isseamless or welded and the wall designation (average wall or minimum wall).15. Keywords15.1 duplex stainless steel; ferritic/austenitic stainless steel; seamless steel tube; stainless steel tube; steel tube; welded
49、 steel tubeA789/A789M 164TABLE 4 Tensile and Hardness RequirementsAUNS DesignationTensileStrength,min, ksiMPaYieldStrength,min, ksiMPaElongationin 2 in. or50 mm,min, %Hardness, maxHBW HRCS31200 100 690 65 450 25 280 . . .S31260 100 690 65 450 25 290 30S31500 92 630 64 440 30 290 30S31803 90 620 65 450 25 290 30S32001 9
