1、Designation: A 209/A 209M 03 (Reapproved 2007)Standard Specification forSeamless Carbon-Molybdenum Alloy-Steel Boiler andSuperheater Tubes1This standard is issued under the fixed designation A 209/A 209M; the number immediately following the designation indicates the yearof original adoption or, in
2、the 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. Scope1.1 This specification2covers several grades of minimum-wall-thickness, seamless, carbo
3、n-molybdenum alloy-steel,boiler and superheater tubes.1.2 This specification covers tubes12 to 5 in. 12.7 to 127mm inclusive, in outside diameter and 0.035 to 0.500 in. 0.9to 12.7 mm, inclusive, in minimum wall thickness.1.3 An optional supplementary requirement is provided and,when desired, shall b
4、e so stated in the order.1.4 The values stated in either inch-pound units or SI unitsare 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
5、. Combining values from thetwo systems may result in nonconformance with the specifi-cation. The inch-pound units shall apply unless the “M”designation of this specification is specified in the order.2. Referenced Documents2.1 ASTM Standards:3A 1016/A 1016M Specification for General Requirementsfor
6、Ferritic Alloy Steel, Austenitic Alloy Steel, and Stain-less Steel Tubes3. General Requirements3.1 Product furnished under this specification shall conformto the requirements of Specification A 1016/A 1016M, includ-ing any supplementary requirements that are indicated in thepurchase order. Failure t
7、o comply with the general require-ments of Specification A 1016/A 1016M constitutes noncon-formance with this specification. In case of conflict with therequirements of this specification and Specification A 1016/A 1016M, this specification shall prevail.4. Materials and Manufacture4.1 Steelmaking P
8、racticeThe steel shall be killed.4.2 The tubes shall be made by the seamless process andshall be either hot-finished or cold-finished, as specified.4.3 Heat TreatmentHot-finished tubes shall be heattreated at a temperature of 1200 F 650 C or higher. Cold-finished tubes shall, after the final cold fi
9、nishing, be heattreated at a temperature of 1200 F 650 C or higher, ortubing may be furnished in the full-annealed, isothermalannealed, or normalized and tempered condition. If furnishedin the normalized and tempered condition, the minimumtempering temperature shall be 1200 F 650 C.5. Chemical Compo
10、sition5.1 The steel shall conform to the requirements given inTable 1.5.2 Product Analysis5.2.1 An analysis shall be made by the manufacturer of onebillet or one tube from each heat. The chemical compositionthus determined, shall conform to the requirements given inTable 1.5.2.2 If the original test
11、 for product analysis fails, retests oftwo additional billets or tubes shall be made. Both retests forthe elements in question shall meet the requirements of thespecification; otherwise all remaining material in the heat or lot(See 7.1) shall be rejected or, at the option of the producer, eachbillet
12、 or tube may be individually tested for acceptance. Billetsor tubes that do not meet the requirements of the specificationshall be rejected.1This specification is under the jurisdiction of ASTM Committee A01 on Steel,Stainless Steel and Related Alloys and is the direct responsibility of Subcommittee
13、A01.10 on Stainless and Alloy Steel Tubular Products.Current edition approved Sept. 1, 2007. Published October 2007. Originallyapproved in 1938. Last previous edition approved in 2003 as A 209/A 209M 03.2For ASME Boiler and Pressure Vessel Code application see related Specifica-tion SA-209 in Sectio
14、n II of that Code.3For referenced 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.TABLE 1 Chemical Composition RequirementsEl
15、ement Composition, %Grade T1 Grade T1a Grade T1bCarbon 0.100.20 0.150.25 0.14 maxManganese 0.300.80 0.300.80 0.300.80Phosphorus, max 0.025 0.025 0.025Sulfur, max 0.025 0.025 0.025Silicon 0.100.50 0.100.50 0.100.50Molybdenum 0.440.65 0.440.65 0.440.651Copyright ASTM International, 100 Barr Harbor Dri
16、ve, PO Box C700, West Conshohocken, PA 19428-2959, United States.6. Mechanical Properties6.1 Tensile Requirements6.1.1 The material shall conform to the requirements givenin Table 2.6.1.2 Table 3 gives the computed minimum elongationvalues for each132-in. 0.8-mm decrease in wall thickness.Where the
17、wall thickness lies between two values shownabove, the minimum elongation value shall be determined bythe following equation:E 5 48t 1 15.00 E 5 1.87t 1 15.00 (1)where:E = elongation in 2 in. 50 mm, %, and,t = actual thickness of specimen, in. mm.6.2 Hardness RequirementsThe tubes shall have a hard-
18、ness not exceeding the values given in Table 4.6.3 Number of Tests6.3.1 Tension TestOne 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 7.2)6.3.2 Flattening TestOne flattening test s
19、hall be made onspecimens from each end of one finished tube, not the one usedfor the flaring test, from each lot (See 7.1)6.3.3 Flaring TestOne flaring test shall be made onspecimens from each end of one finished tube, not the one usedfor the flattening test, from each lot (See 7.1)6.3.4 Hardness Te
20、stBrinell or Rockwell hardness testsshall be made on specimens from two tubes from each lot (See7.2)7. Sampling7.1 Flattening, Flaring, and Product AnalysisFor flatten-ing, flaring, and product analysis requirements, the term lotapplies to all tubes prior to cutting of the same nominal sizeand wall
21、thickness that are produced from the same heat ofsteel. When final heat treatment is in a batch-type furnace, a lotshall include only those tubes of the same size and from thesame heat that are heat treated in the same furnace charge.When the final heat treatment is in a continuous furnace, thenumbe
22、r of tubes of the same size and from the same heat in alot shall be determined from the size of the tubes given in Table5.7.2 Tension and Hardness TestsFor tension and hardnesstests, the term lot applies to all tubes prior to cutting, of thesame nominal diameter and wall thickness that are producedf
23、rom the same heat of steel. When final heat treatment is in abatch-type furnace, a lot shall include only those tubes of thesame size and the same heat that are heat treated in the samefurnace charge. When the final heat treatment is in a continuousfurnace, a lot shall include all tubes of the same
24、size and heat,heat treated in the same furnace at the same temperature, timeat heat, and furnace speed.8. Forming Operations8.1 Tubes when inserted in the boiler shall stand expandingand beading without showing cracks or flaws. Superheatertubes when properly manipulated shall stand all forging,weldi
25、ng, and bending operations necessary for applicationwithout developing defects.9. Product Marking9.1 In addition to the marking prescribed in SpecificationA 1016/A 1016M, the marking shall include whether the tubeis hot-finished or cold-finished.TABLE 2 Tensile RequirementsGradeT1GradeT1bGradeT1aTen
26、sile strength, min, ksi MPa 55 380 53 365 60 415Yield strength, min, ksi MPa 30 205 28 195 32 220Elongation in 2 in. or 50 mm, min, % 30 30 30For longitudinal strip tests a deductionshall be made for each132-in.0.8- mm decrease in wall thicknessbelow516 in. 8 mm from thebasic minimum elongation of t
27、hefollowing percentage1.50A1.50A1.50AWhen standard round 2-in. or 50-mmgage length or smaller proportion-ally sized specimen with the gagelength equal to 4D (four times thediameter) is used22 22 22ATable 3 gives the computed minimum values.TABLE 3 Computed Minimum ValuesWall Thickness Elongation in
28、2 in. or 50mm, min, %Ain. mm5/16 (0.312) 8 309/32 (0.281) 7.2 291/4 (0.250) 6.4 277/32 (0.219) 5.6 263/16 (0.188) 4.8 245/32 (0.156) 4 221/8 (0.125) 3.2 213/32 (0.094) 2.4 201/16 (0.062) 1.6 18ACalculated elongation requirements shall be rounded to the nearest wholenumber.TABLE 4 Hardness Requiremen
29、tsBrinell HardnessNumber (Tubes 0.200in. 5.1 mm and over inWall Thickness), HBWRockwell HardnessNumber (Tubes less than0.200 in. 5.1 mm inWall Thickness), HRBGrade T 1 146 80Grade T 1a 153 81Grade T 1b 137 77TABLE 5 Number of Tubes in a Lot Heat Treated by theContinuous ProcessSize of Tube Size of L
30、ot2 in. 50.8 mm and over in outside diameter and0.200 in. 5.1 mm and over in wall thicknessnot more than 50 tubes2 in. 50.8 mm and over in outside diameter andunder 0.200 in. 5.1 mm in wall thicknessnot more than 75 tubesLess than 2 in. 50.8 mm but over 1 in. 25.4 mmin outside diameternot more than
31、75 tubes1 in. 25.4 mm or less in outside diameter not more than 125 tubesA 209/A 209M 03 (2007)210. Keywords10.1 boiler tubes; carbon-molybdenum; seamless steeltube; steel tube; superheater tubesSUPPLEMENTARY REQUIREMENTSThe following supplementary requirement shall apply only when specified by the
32、purchaser in theinquiry, contract, or order.S1. Surface ConditionS1.1 If pickling or shot blasting, or both, are required, thisshall be specifically stated in the order. Details of this supple-mental requirement shall be agreed upon between the manu-facturer and the purchaser.ASTM International take
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34、ponsibility.This standard is subject to revision at any time by the responsible technical committee and must be reviewed every five years andif not revised, either reapproved or withdrawn. Your comments are invited either for revision of this standard or for additional standardsand should be address
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36、 address shown below.This standard is copyrighted by ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959,United States. Individual reprints (single or multiple copies) of this standard may be obtained by contacting ASTM at the aboveaddress or at 610-832-9585 (phone), 610-832-9555 (fax), or serviceastm.org (e-mail); or through the ASTM website(www.astm.org).A 209/A 209M 03 (2007)3
