1、Designation: A 789/A 789M 05bStandard Specification forSeamless and Welded Ferritic/Austenitic Stainless SteelTubing for General Service1This standard is issued under the fixed designationA 789/A 789M; the number immediately following the designation indicates the yearof original adoption or, in the
2、 case of revision, the year 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 specification2covers grades of nominal wall thick-ness, stainless steel tubing f
3、or services requiring generalcorrosion resistance, with particular emphasis on resistance tostress corrosion cracking. These steels are susceptible toembrittlement if used for prolonged periods at elevated tem-peratures.1.2 The values stated in either inch-pound units or SI unitsare to be regarded s
4、eparately 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-cation. The inch-pou
5、nd units shall apply unless the M desig-nation of this specification is specified in the order.2. Referenced Documents2.1 ASTM Standards:3A 480/A 480M Specification for General Requirements forFlat-Rolled Stainless and Heat-Resisting Steel Plate,Sheet, and StripA 1016/A 1016M Specification for Gener
6、al Requirementsfor Ferritic Alloy Steel, Austenitic Alloy Steel, and Stain-less Steel TubesE 527 Practice for Numbering Metals and Alloys (UNS)2.2 SAE Standard:4SAE J 1086 Practice for Numbering Metals and Alloys(UNS)3. Ordering Information3.1 Orders for product under this specification should in-cl
7、ude 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 diameter and nominal wall thickness),3.1.5 Length (specific or random),3.1.6 O
8、ptional 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 ofSpecification A 1016/A 1016M),3.1.8 Specification designation, and3.1.9 Special requirements.4. General Requirements4.1
9、 Product furnished under this specification shall conformto the applicable requirements of Specification A 1016/A 1016M, unless otherwise provided herein.5. Manufacture5.1 The tubes shall be made by the seamless or weldedprocess with no filler metal added.6. Heat Treatment6.1 All tubes shall be furn
10、ished 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, immediately follow-ing hot forming while the temperature of the tubes is not lessthan the specified minimum
11、solution treatment temperature,tubes may be individually quenched in water or rapidly cooledby other means.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 St
12、eel Tubular Products.Current edition approved September 1, 2005. Published September 2005.Originally approved in 1981. Last previous edition approved in 2005 as A 789/A 789M05a.2For ASME Boiler and Pressure Vessel Code applications, see related Specifi-cation SA789 in Section II of that Code.3For re
13、ferenced ASTM standards, visit the ASTM website, www.astm.org, orcontact 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 Commonwea
14、lthDr., Warrendale, PA 15096-0001.1*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. Chemical Composition7.1 The steel shall conform to the chemical requirementsprescr
15、ibed in Table 1.8. Product Analysis8.1 An analysis of either one billet or one length offlat-rolled stock or one tube shall be made from each heat. Thechemical composition thus determined shall conform to therequirements specified.8.2 A product analysis tolerance (see the annex table onChemical Requ
16、irements (Product Analysis Tolerances) inSpecification A 480/A 480M) shall apply. The product analysistolerance is not applicable to the carbon content 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,
17、 lengths of flat-rolled stock, or tubes shallbe made. Both retests for the elements in question shall meetthe requirements of this specification; otherwise, all remainingmaterial in the heat shall be rejected or, at the option of theproducer, each billet or tube may be individually tested foraccepta
18、nce. Billets, lengths of flat-rolled stock, or tubes that donot meet the requirements of this specification shall be re-jected.NOTE 1For flange and flaring requirements, the term lot applies to alltubes prior to cutting of the same nominal size and wall thickness that areproduced from the same heat
19、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 treated in the same furnace charge.When the final heat treatment is in a continuous furnace, or when heattreated condition is obtained directly by
20、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 prescribed in Table 3.NOTE 2For tension and hardness test requirements, the term lotapplies to all tubes prior to cutting, of the same nominal diameter an
21、d 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 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 whe
22、nheat 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 thesame 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 samepro
23、duction 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 shallbe 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 spe
24、cimens 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 (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
25、 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, flanging, and hardness test requirements shall apply toeach heat.9.6 Reverse Flattening TestFor welded tubes, one reverseflattening test shall be
26、made on a specimen from each 1500 ft450 m of finished tubing.10. Hydrostatic or Nondestructive Electric Test10.1 Each 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 i
27、n the purchase order.TABLE 1 Chemical RequirementsAUNSDesignationBC 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.
28、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 0.020 1.00 3.0-4.0 19.5-22.5 1.50-2.00 0.14-0.20 . . . . . .S32101 0
29、.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 . . .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 . . .S32520 0.030 1.50 0.035 0.020 0.80 5.58.0 23.025.0 3.5
30、. 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 0.52.0S32750 0.030 1.20 0.035 0.020 0.80 6.08.0 24.026.0 3.05.0 0.240.32 0.50 . . .S32760 0.05 1.00 0.030 0.010 1.00
31、6.08.0 24.026.0 3.04.0 0.200.30 0.501.00 W 0.501.0040 minCS32808 0.030 1.10 0.030 0.030 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 .
32、. .S32950 0.030 2.00 0.035 0.010 0.60 3.55.2 26.029.0 1.002.50 0.150.35 . . . . . .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 0.801.21AMaximum, unless a range or minimum is indi
33、cated. Where ellipses (.) appear in this table, there is no minimum and analysis for the element need not be determinedor reported.BNew designation established in accordance with Practice E 527 and SAE J1086.C%Cr+3.33 %Mo+163 %N.A 789/A 789M 05b210.2 The hydrostatic test shall be in accordance with
34、Speci-fication A 1016/A 1016M, except that in 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
35、 Dimensions12.1 Variations in outside diameter, 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.
36、 In such tubes, the maximum andminimum diameters at any cross section shall deviate from theTABLE 2 Heat TreatmentUNS Designation Temperature F C QuenchS31200 1920201010501100rapid cooling in waterS31260 1870201010201100rapid cooling in air or waterS31500 180019009801040rapid cooling in air or water
37、S31803 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 meansS32205 1870201010201100rapid cooling in air or waterS32304 170019209251050r
38、apid 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 2010208511001140rapid cooling in air or waterS32808 192021001
39、0501150rapid cooling in air or waterS32900 17001750925955rapid cooling in air or waterS32906 1870210010201150rapid cooling in air or waterS32950 182018809901025air coolS39274 1920206010251125rapid cooling in air or waterS39277 1975215510801180rapid cooling in air or waterTABLE 3 Number of Tubes in a
40、 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.25.4 mm
41、 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 tubesTABLE 4 Tensile and Hardness RequirementsAUNS DesignationTensileStrength,min, ksiMPaYieldStrength,min, ksiMPaElongationin 2 in. or50 mm,min, %Hardnes
42、s, maxHBW HRCS31200 100 690 65 450 25 280 . . .S31260B100 690 65 450 25 290 30S31500 92 630 64 440 30 290 30S31803 90 620 65 450 25 290 30S32001 90 620 65 450 25 290 30S32003C100 690 70 485 25 290 30S32101Wall # 0.187 in.5.00 mm101 700 77 530 30 290 . . .Wall 0.187 in.5.00 mm94 650 65 450 30 290 . .
43、 .S32205 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 30S32520 112 770 80 550 25 310 . . .S32550 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 25 300 . . .S328
44、08 116 800 80 550 15 310 32S32900 90 620 70 485 20 271 28S32906Wall below 0.40 in.(10 mm)116 800 94 650 25 300 32Wall 0.40 in. (10 mm)and above109 750 80 550 25 300 32S32950D100 690 70 480 20 290 30S39274 116 800 80 550 15 310 . . .S39277 120 825 90 620 25 290 30AFor tubing smaller than12 in. 12.7 m
45、m in outside diameter, the elongationvalues given for strip specimens in Table 4 shall apply. Mechanical propertyrequirements do not apply to tubing smaller than18 in. 3.2 mm in outsidediameter or with walls thinner than 0.015 in. 0.4 mm.BPrior to A 789/A 789M87, the values for S31260 were 92 ksi te
46、nsile strength,54 ksi yield strength, and 30 % elongation.CPrior to A 789/A 789M04, the values for S32003 were 90 ksi tensile strengthand 65 ksi yield strength.DPrior to A 789/A 789M89, the tensile strength value was 90 ksi for UNSS32950.A 789/A 789M 05b3nominal diameter by no more than twice the pe
47、rmissiblevariation 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 of excessive mill scale, suitablefor inspection. A slight amount of oxidation will not becons
48、idered 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 SpecificationA 1016/A 1016M, the marking shall indicate whether thetubing is seamless or welded.15. Keywords15.1 duplex stainless steel; ferritic/austenitic stainless steel;seamless steel tube; stainless steel tube; steel tube; welded steeltubeSUPPLEMENTARY REQUIREMENTSThe following supplementary requirement shall apply only when specified by the purchaser in theinquiry, contract, or order.S1.
