1、Designation: A789/A789M 17A789/A789M 17aStandard 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
2、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*1.1 This specification2 covers grades of average wall thickness, or, if specifie
3、d 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 value
4、s 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 standa
5、rd. 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.1.3 This international standard was developed in accordance with internationally recognized principles on standardizationestablished in th
6、e Decision on Principles for the Development of International Standards, Guides and Recommendations issuedby the World Trade Organization Technical Barriers to Trade (TBT) Committee.2. Referenced Documents2.1 ASTM Standards:3A480/A480M Specification for General Requirements for Flat-Rolled Stainless
7、 and Heat-Resisting Steel 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
8、Numbering Metals and 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 Gra
9、de (see Table 1),3.1.4 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
10、 required (see the Inspection section of Specification A1016/A1016M),3.1.8 Specification designation, and3.1.9 Special requirements.1 This specification is under the jurisdiction ofASTM Committee A01 on Steel, Stainless Steel and RelatedAlloys and is the direct responsibility of Subcommittee A01.10o
11、n Stainless and Alloy Steel Tubular Products.Current edition approved March 15, 2017Sept. 1, 2017. Published March 2017October 2017. Originally approved in 1981. Last previous edition approved in 20162017as A789/A789M 16a.A789/A789M 17. DOI: 10.1520/A0789_A0789M-17.10.1520/A0789_A0789M-17A.2 For ASM
12、E Boiler and Pressure Vessel Code applications, see related Specification SA789 in Section II of that Code.3 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 standa
13、rds Document Summary page on the ASTM website.4 Available from Society of Automotive Engineers (SAE), 400 Commonwealth Dr., Warrendale, PA 15096-0001, 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 ha
14、ve 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 ASTM is to be considered the official do
15、cument.*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 States14. General Requirements4.1 Product furnished under this specification shall conform to the applicable requirements
16、 of Specification A1016/A1016M,unless otherwise provided herein.5. 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. F
17、or seamlesstubes, as an 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 co
18、oled by other means.7. Chemical 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
19、 conform to the requirements 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 carbo
20、n of 0.04 % or less.8.3 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 s
21、hall be rejected or, at 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
22、to all tubes prior to cutting 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.
23、When the final heat treatment is in a continuous furnace, or when heat treated conditionTABLE 1 Chemical RequirementsAUNSDesignationB 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 2.5
24、3.5 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 . . . . . .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
25、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 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 .
26、. . . . .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 0.015 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 24.02
27、7.0 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 0.52.0S32750C 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
28、 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 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 . .
29、 . . . .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 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
30、.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 0.100.80 . . .S83071 0.030 0.501.50 0.030 0.020 0.50 6.08.0 29.031.0 3.04.0 0.280.40 0.80 . . .AMaximum, unless a range or minimum is indicated. Where ellipses (.) appear in this table,
31、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 + 16 % N $ 40.A789/A789M 17a2is obtained directly by quenching after hot forming, the number of
32、 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 requirements, the term lot applies to all tubes prior to cutting, of the same nominal diameter and wall thicknessthat are produced from t
33、he 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 in the same furnace charge. When the final heat treatment is in a continuous furnace, or when heat treated conditionis obtained di
34、rectly 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 sametemperature, time at heat, and furnace speed, or all tubes of the same size and heat, hot formed and quenched in the same production run.TABLE 2 Heat TreatmentU
35、NS 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 waterS32003 18502
36、05010101120rapid 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 1870205010201120rapid coolin
37、g 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 1920210010501150rapi
38、d 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 1975215510801180rapid
39、cooling in air or waterS82011 1850205010101120rapid cooling in air or waterS82441 1830 1000 min rapid cooling in air or waterS83071 1830210010001150rapid cooling in wateror by other meansTABLE 3 Number of Tubes in a Lot Heat Treated by theContinuous Process or by Direct Quench after Hot FormingSize
40、of Tube Size of Lot2 in. 50.8 mm and over in outside 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 tube
41、s1 in. 25.4 mm or less in outside diameter not more than 125 tubesA789/A789M 17a39. Mechanical Tests Required9.1 Tension TestsOne tension test shall be made on a specimen for lots of not more than 50 tubes. Tension tests shall be madeon specimens from two tubes for lots of more than 50 tubes (see No
42、te 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 %.9.3 Flange Test (for Welded Tubes)One test shall be made on specimens from one end of one tu
43、be 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 When more than one heat is involved, the tension, flaring, flanging, and hardness test requirements shall apply to each heat.9.6
44、 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 Electric Test10.1 Each tube shall be subjected to the nondestructive electric test or the hydrostatic test. The type of test t
45、o 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/A1016M, except that in the calculation of thehydrostatic test pressure 64000(441.2) shall be substituted for 32000(220.6).11
46、. 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 Variations in outside diameter, wall thickness, and length from those specified shall not exceed the amounts prescribed inTable 5
47、.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, the maximum and minimum diameters at any cross section shall deviate from the nominaldiameter by no more than twice the permiss
48、ible 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 Condition13.1 All tubes shall be free of excessive mill scale, suitable for inspection. A slight amount of oxidation will not be consi
49、deredas 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 prescribed in Specification A1016/A1016M, the marking shall indicate whether the tubing isseamless or welded and the wall designation (average wall or minimum wal
