1、Designation: A789/A789M 16aStandard 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 or, in the ca
2、se 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 specification2covers grades of average wallthickness, or, if specified on the order,
3、 minimum wallthickness, of stainless steel tubing for services requiringgeneral corrosion resistance, with particular emphasis onresistance to stress corrosion cracking. These steels are suscep-tible to embrittlement if used for prolonged periods at elevatedtemperatures.1.2 The values stated in eith
4、er SI units or inch-pound unitsare to be regarded separately as standard. The values stated ineach system may not be exact equivalents; therefore, eachsystem shall be used independently of the other. Combiningvalues from the two systems may result in non-conformancewith the standard. Within the text
5、, the SI units are shown inbrackets. The inch-pound units shall apply unless the Mdesignation of this specification is specified in the order.2. Referenced Documents2.1 ASTM Standards:3A480/A480M Specification for General Requirements forFlat-Rolled Stainless and Heat-Resisting Steel Plate,Sheet, an
6、d StripA1016/A1016M Specification for General Requirements forFerritic Alloy Steel, Austenitic Alloy Steel, and StainlessSteel TubesE527 Practice for Numbering Metals and Alloys in theUnified Numbering System (UNS)2.2 SAE Standard:4SAE J 1086 Practice for Numbering Metals and Alloys(UNS)3. Ordering
7、Information3.1 Orders for product under this specification should in-clude the following, as required, to describe the desiredmaterial adequately: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),3.1.4 Size (outside diamete
8、r 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 Sec-tion 8; for hydrostatic or nondestructive electric test, seeSection 10),3.1.7 Test report required (see the Inspection section ofSpeci
9、fication A1016/A1016M),3.1.8 Specification designation, and3.1.9 Special requirements.4. General Requirements4.1 Product furnished under this specification shall conformto the applicable requirements of Specification A1016/A1016M, unless otherwise provided herein.5. Manufacture5.1 The tubes shall be
10、 made by the seamless or weldedprocess with no filler metal added.6. Heat Treatment6.1 All tubes shall be furnished in the heat-treated conditionin accordance with the procedures shown in Table 2. Forseamless tubes, as an alternate to final heat treatment in acontinuous furnace or batch-type furnace
11、, immediately follow-ing hot forming while the temperature of the tubes is not lessthan the specified minimum solution treatment temperature,tubes may be individually quenched in water or rapidly cooledby other means.7. Chemical Composition7.1 The steel shall conform to the chemical requirementspres
12、cribed in Table 1.1This specification is under the jurisdiction 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. 1, 2016. Published September 2016. Ori
13、ginallyapproved in 1981. Last previous edition approved in 2016 as A789/A789M 16.DOI: 10.1520/A0789_A0789M-16A.2For ASME Boiler and Pressure Vessel Code applications, see related Specifi-cation SA789 in Section II of that Code.3For referenced ASTM standards, visit the ASTM website, www.astm.org, orc
14、ontact ASTM Customer Service at serviceastm.org. For Annual Book of ASTMStandards volume information, refer to the standards Document Summary page onthe ASTM website.4Available from Society of Automotive Engineers (SAE), 400 CommonwealthDr., Warrendale, PA 15096-0001, http:/www.sae.org.*A Summary of
15、 Changes section appears at the end of this standardCopyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States18. Product Analysis8.1 An analysis of either one billet or one length offlat-rolled stock or one tube shall be made from each heat. Th
16、echemical composition thus determined shall conform to therequirements specified.8.2 A product analysis tolerance (see the annex table onChemical Requirements (Product Analysis Tolerances) inSpecification A480/A480M) shall apply. The product analysistolerance is not applicable to the carbon content
17、for materialwith a specified maximum carbon of 0.04 % or less.8.3 If the original test for product analysis fails, retests oftwo additional billets, lengths of flat-rolled stock, or tubes shallbe made. Both retests for the elements in question shall meetthe requirements of this specification; otherw
18、ise, all remainingmaterial in the heat shall be rejected or, at the option of theproducer, each billet or tube may be individually tested foracceptance. Billets, lengths of flat-rolled stock, or tubes that donot meet the requirements of this specification shall be re-jected.NOTE 1For flange and flar
19、ing requirements, the term lot applies to alltubes 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 abatch-type furnace, a lot shall include only those tubes of the same sizeand from the same heat that are heat
20、 treated in the same furnace charge.When the final heat treatment is in a continuous furnace, or when heattreated condition is obtained directly by quenching after hot forming, thenumber of tubes of the same size and from the same heat in a lot shall bedetermined from the size of the tubes as prescr
21、ibed in Table 3.NOTE 2For tension and hardness test requirements, the term lotapplies to all tubes prior to cutting, of the same nominal diameter and wallthickness that are produced from the same heat of steel. When final heattreatment is in a batch-type furnace, a lot shall include only those tubes
22、 ofthe same size and the same heat that are heat treated in the same furnacecharge. When the final heat treatment is in a continuous furnace, or whenheat treated condition is obtained directly by quenching after hot forming,a lot shall include all tubes of the same size and heat, heat treated in the
23、same furnace at the same temperature, time at heat, and furnace speed, orall tubes of the same size and heat, hot formed and quenched in the sameproduction run.9. Mechanical Tests Required9.1 Tension TestsOne tension test shall be made on aspecimen for lots of not more than 50 tubes. Tension tests s
24、hallbe made on specimens from two tubes for lots of more than 50tubes (see Note 2).9.2 Flaring Test (for Seamless Tubes)One test shall bemade on specimens from one end of one tube from each lot(see Note 1) of finished tubes. The minimum expansion of theinside diameter shall be 10 %.9.3 Flange Test (
25、for Welded Tubes)One test shall be madeon specimens from one end of one tube from each lot (see Note1) of finished tubes.9.4 Hardness TestBrinell or Rockwell hardness tests shallbe made on specimens from two tubes from each lot (see Note2).9.5 When more than one heat is involved, the tension,flaring
26、, flanging, and hardness test requirements shall apply toeach heat.9.6 Reverse Flattening TestFor welded tubes, one reverseflattening test shall be made on a specimen from each 1500 ft450 m of finished tubing.TABLE 1 Chemical RequirementsAUNSDesignationBC Mn P S Si Ni Cr Mo N Cu OthersS31200 0.030 2
27、.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 . . . . . .S31803 0.030 2.00 0.030 0.020 1.00 4.56.5 21.023.0 2.53.5 0.0
28、80.20 . . . . . .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 0.10-0.80 0.20-0.25 0.10-0.80 . . .S32202 0.030 2.00 0.040 0.0
29、10 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 0.015 0.90 5.57.2 24.026.0 3.03.5 0.080.20 . . . W 0.050.30S3252
30、0 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 0.52.0S32750C0.030 1.20 0.035 0.020 0.80 6.08.0 24.026.0 3.05.0 0.24
31、0.32 0.50 . . .S32760D0.030 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 1.002.00 . . . . . . . . .S32906 0.030 0.801.50 0.030 0.030 0.80
32、 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 6.08.0 24.026.0 2.53.5 0.240.32 0.200.80 W 1.502.50S39277 0.025
33、 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 0.100.80AMaximum, unless a range or minimum is indicated. Where elli
34、pses (.) appear in this table, there is no minimum and analysis for the element need not be determinedor reported.BDesignation 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 16a210. Hydrostatic or Nondestructive Electric Test10.1 Each
35、tube shall be subjected to the nondestructiveelectric test or the hydrostatic test. The type of test to be usedshall be at the option of the manufacturer, unless otherwisespecified in the purchase order.10.2 The hydrostatic test shall be in accordance with Speci-fication A1016/A1016M, except that in
36、 the calculation of thehydrostatic test pressure 64000(441.2) shall be substituted for32000(220.6).11. Tensile and Hardness Properties11.1 The material shall conform to the tensile and hardnessproperties prescribed in Table 4.12. Permissible Variations in Dimensions12.1 Variations in outside diamete
37、r, wall thickness, andlength from those specified shall not exceed the amountsprescribed in Table 5.12.2 The permissible variations in outside diameter given inTable 5 are not sufficient to provide for ovality in thin-walledtubes, as defined in the table. In such tubes, the maximum andminimum diamet
38、ers at any cross section shall deviate from thenominal diameter by no more than twice the permissiblevariation in outside diameter given in Table 5; however, themean diameter at that cross section must still be within thegiven permissible variation.13. Surface Condition13.1 All tubes shall be free o
39、f excessive mill scale, suitablefor inspection. A slight amount of oxidation will not beconsidered as scale. Any special finish requirements shall besubject to agreement between the manufacturer and the pur-chaser.14. Product Marking14.1 In addition to the marking prescribed in SpecificationA1016/A1
40、016M, the marking shall indicate whether the tubingis seamless or welded and the wall designation (average wall orminimum wall).TABLE 2 Heat TreatmentUNS Designation Temperature F C QuenchS31200 1920201010501100rapid cooling in waterS31260 1870201010201100rapid cooling in air or waterS31500 18001900
41、9801040rapid cooling in air or waterS31803 1870201010201100rapid cooling in air or waterS32001 180019509821066rapid cooling in air or waterS32003 1850205010101120rapid cooling in air or waterS32101 1870 1020 min quenched in water or rapidlycooled by other meansS32202 1870197510201080rapid cooling in
42、 air or waterS32205 1870201010201100rapid cooling in air or waterS32304 170019209251050rapid cooling in air or waterS32506 1870205010201120rapid cooling in air or waterS32520 1975205010801120rapid cooling in air or waterS32550 19001040 minrapid cooling in air or waterS32707 1975205010801120rapid coo
43、ling in air or waterS32750 1880206010251125rapid cooling in air or waterS32760 1960208510701140rapid cooling in air or waterS32808 1920210010501150rapid cooling in air or waterS32900 17001750925955rapid cooling in air or waterS32906 1870210010201150rapid cooling in air or waterS32950 182018809901025
44、air coolS33207 1905208510401140rapid cooling in wateror by other meansS39274 1920206010251125rapid cooling in air or waterS39277 1975215510801180rapid cooling in air or waterS82011 1850205010101120rapid cooling in air or waterS82441 1830 1000 min rapid cooling in air or waterTABLE 3 Number of Tubes
45、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 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.
46、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 more than 125 tubesA789/A789M 16a315. Keywords15.1 duplex stainless steel; ferritic/austenitic stainless steel;seamless steel tube; stainless steel tube; steel tube
47、; welded steeltubeTABLE 4 Tensile and Hardness RequirementsAUNS DesignationTensileStrength,min, ksiMPaYieldStrength,min, ksiMPaElongationin 2 in. or50 mm,min, %Hardness, maxHBW HRCS31200 100 690 65 450 25 280 29S31260 100 690 65 450 25 290 30S31500 92 630 64 440 30 290 30S31803 90 620 65 450 25 290
48、30S32001 90 620 65 450 25 290 30S32003B100 690 70 485 25 290 30S32101Wall # 0.187 in.5.00 mm101 700 77 530 30 290 30Wall 0.187 in.5.00 mm94 650 65 450 30 290 30S32202 94 650 65 450 30 290 30S32205 95 655 70 485 25 290 30S32304OD 1 in. 25 mm andUnder 100 690 65 450 25 . . . . . .OD over 1 in. 25 mm 87 600 58 400 25 290 30S32506 90 620 65 450 18 302 32S32520 112 770 80 550 25 310 32S32550 110 760 80 550 15 297 31S32707 133 920 101 700 25 318 34S32750 116 800 80 550 15 300 32S32760 109 750 80 550 25 310 32S32808 116 800 80 550 15 310 32S32900 90 620 70 485
