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ASTM A1020 - A 1020M - 02 (2012).pdf

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ASTM A1020 - A 1020M - 02 (2012).pdf

Designation A1020/A1020M − 02 Reapproved 2012Standard Specification forSteel Tubes, Carbon and Carbon Manganese, FusionWelded, for Boiler, Superheater, Heat Exchanger andCondenser Applications1This standard is issued under the fixed designation A1020/A1020M; the number immediately following the designation indicates theyear of original adoption or, in the case of revision, the year of last revision. A number in parentheses indicates the year of lastreapproval. A superscript epsilon indicates an editorial change since the last revision or reapproval.1. Scope1.1 This specification covers minimum wall thicknesswelded tubes made from carbon and carbon manganese steelslisted in Table 1, with various grades intended for use in boiler,superheater, heat exchanger, or condenser applications.1.2 The tubing sizes and thicknesses usually furnished tothis specification are1⁄4 to 5 in. [6.3 to 127 mm] in outsidediameter and 0.015 to 0.375 in. [0.4 to 9.5 mm], inclusive, inwall thickness. Tubing having other dimensions may be fur-nished provided such tubes comply with all other requirementsof this specification.1.3 Mechanical property requirements do not apply totubing smaller than1⁄8 in. [3.2 mm] in inside diameter or 0.015in. [0.4 mm] in thickness.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. Combining values from thetwo systems may result in nonconformance with the specifi-cation. The inch-pound units shall apply unless the “M”designation of the specification is specified in the order.1.5 Optional supplementary requirements are provided andwhen desired, shall be so stated on the purchase order.1.6 This standard does not purport to address all of thesafety concerns, if any, associated with its use. It is theresponsibility of the user of this standard to establish appro-priate safety and health practices and determine the applica-bility of regulatory requirements prior to use.2. Referenced Documents2.1 ASTM Standards2A450/A450M Specification for General Requirements forCarbon and Low Alloy Steel TubesE213 Practice for Ultrasonic Testing of Metal Pipe andTubingE273 Practice for Ultrasonic Testing of the Weld Zone ofWelded Pipe and Tubing3. Ordering Information3.1 Orders for material under this specification shouldinclude the following, as required, to describe the desiredmaterial adequately3.1.1 Quantity feet, metres, or number of lengths.3.1.2 Name of material welded tubes.3.1.3 Grade Table 1.3.1.4 Size outside diameter and minimum wall thickness.3.1.5 Length specific or random.3.1.6 Optional requirements product analysis, hydrostaticor nondestructive electric test, crush test, and bar coding.3.1.7 Test report required see Certification Section ofSpecification A450/A450M.3.1.8 Specification designation.3.1.9 Optional supplementary requirements are providedand when desired, shall be designated on the order.4. General Requirements4.1 Material furnished under this specification shall con-form to the applicable requirements of the current edition ofSpecification A450/A450M, unless otherwise provided herein.5. Materials and Manufacture5.1 All steels shall be killed.1This specification is under the jurisdiction of ASTM Committee A01 on Steel,Stainless Steel and Related Alloys and is the direct responsibility of SubcommitteeA01.09 on Carbon Steel Tubular Products.Current edition approved Sept. 1, 2012. Published November 2012. Originallyapproved in 2001. Last previous edition approved in 2007 as A1020/A1020M - 022007. DOI 10.1520/A1020_A1020M-02R12.2For 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 standard’s Document Summary page onthe ASTM website.Copyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States1Copyright by ASTM Intl all rights reserved;5.2 The tubes shall be made by an automatic fusion weldingprocess with no addition of filler metal.6. Heat Treatment6.1 After welding, all tubes shall be heat treated at atemperature of 1650F [900C] or higher and followed bycooling in air or in the cooling chamber of a controlledatmosphere furnace. Cold drawn tubes shall be heat treatedafter the final cold-draw pass at a temperature of 1200F[650C] or higher.7. Chemical Composition7.1 The steel shall conform to the requirements as tochemical composition prescribed in Table 1.7.2 When a grade is ordered under this specification, sup-plying an alloy grade that specifically requires the addition ofany element other than those listed in Table 1 is not permitted.8. Product Analysis8.1 For the purpose of product analysis, a lot consists of 250pieces for sizes up to and including 3 in. [76.2 mm] OD and100 pieces for sizes over 3 in. [76.2 mm] OD; or when tubesare identified by heat number, all tubes within that heat.8.2 When requested on the purchase order, a product analy-sis shall be made by the manufacturer or supplier from one tubeper lot. The chemical composition thus determined shallconform to the requirements specified.8.3 If the original test for product analysis fails, retest of twoadditional tubes per lot shall be made. Both retests, for theelements in question, shall meet the requirements of thespecification; otherwise all remaining material in the heat or lotshall be rejected; or at the option of the producer, each tubemay be individually tested for acceptance and those pieces thatdo not meet the requirements of the specification shall berejected.9. Tensile and Hardness Requirements9.1 The term lot for tension and hardness tests applies to alltubes prior to cutting, of the same specified outside diameterand wall thickness, which 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 the sameheat which are heat treated in the same furnace charge. Whenthe final heat treatment is in a continuous furnace, a lot shallinclude all tubes of the same size and heat, heat treated in thesame furnace, at the same temperature, time at heat, andfurnace speed.9.2 For Grade A tubes, hardness test shall be made onspecimens from each of two tubes from each lot and shall nothave a hardness number exceeding 72 HRB.9.3 Grade C and D tubes, one tension test shall be made onspecimens from each of two tubes from each lot and shallconform to properties prescribed in Table 2.9.4 Table 3 gives the computed minimum elongation valuesfor each1⁄32-in, [0.8-mm] decrease in wall thickness. Where thewall thickness lies between two values shown above. Theminimum elongation value shall be determined by the follow-ing equationE 5 48t115.00E 5 1.87t115.00whereE elongation in 2 in. or 50 mm, min, , andt actual wall thickness of specimen, in. [mm].10. Crush Test10.1 Where specified in the purchase order, crushing testsshall be made. The test specimens shall be sections of tubehaving a length that is at least 21⁄2 times the specified outsidediameter of the tube for tubes that are less than 1 in. [25.4 mm]in specified outside diameter, and at least 21⁄2 in. [63 mm] fortubes that are 1 in. [25.4 mm] or larger in specified outsidediameter. Slight surface checks shall not be cause for rejection.The test specimens shall withstand crushing longitudinallywithout cracking, splitting, or opening at the weld, as followsWall Thickness of Tubes,in. [mm]Height of Crushed Section,in. [mm]Grade A Tubes Grades C and D Tubes0.135 in. [3.4] and under3⁄4 in. [19] or until outsidefolds are in contactCrush tests not requiredOver 0.135 in. [3.4] 11⁄4 [32]11. Mechanical Tests Required11.1 For mechanical tests, a lot consists of 250 tubes forsizes up to and including 3 in. [76.2 mm] and 100 tubes forsizes over 3 in. [76.2 mm], or fraction thereof, prior to cutting.11.2 Flattening TestsOne flattening test shall be made onspecimens from each of two tubes from each lot or fractionthereof.11.3 Flange TestTABLE 1 Chemical Requirements, Composition, Element Grade ALow CarbonSteelGrade CMedium CarbonSteelGrade DCarbon ManganeseSteelCarbon 0.06–0.18 0.30 max 0.27 maxManganese 0.27–0.63 0.80 max 1.00–1.50Phosphorus 0.035 max 0.035 max 0.030 maxSulfur 0.035 max 0.035 max 0.015 maxSilicon No Requirement No Requirement 0.10 minTABLE 2 Tensile RequirementsGrade C Grade DTensile strength, min, ksi, [MPa] 60 [415] 70 [485]Yield strength, min, ksi, [MPa] 37 [255] 40 [275]Elongation in 2 in. or 50 mm, min 30 30For elongation strip tests, a deduction for each1⁄32-in. [0.8 mm] decrease in wall thickness below5⁄16in. [8 mm] from the basic minimum elongation ofthe following percentage points shall be made.1.50A1.50AASee Table 3 for the computed minimum values.NoteFor the purposes of design, the following tensile properties may beassumed for Grade A tubesTensile strength, min, ksi, [MPa] 47 [325]Yield strength, min, ksi, [MPa] 26 [180]Elongation in 2 in. or 50 mm, min, 35A1020/A1020M − 02 20122Copyright by ASTM Intl all rights reserved;11.3.1 For Grade A, one flange test shall be made onspecimens from each of two tubes from each lot or fractionthereof.11.3.2 For Grades C and D, one flange test shall be made onspecimens from each of two tubes from each lot or fractionthereof. The width of the flange shall not be less than 75 ofthat specified in specification A450/A450M.11.4 Crush TestFor Grade A, where specified in thepurchase order, one crush test shall be made on specimens fromeach of two tubes from each lot or fraction thereof.11.5 Reverse Flattening TestOne reverse flattening testshall be made on each 1500 ft [450 m] of finished tubing.12. Nondestructive Examination12.1 Hydrostatic or Nondestructive Electric TestEachtube shall be subjected to either the hydrostatic or the nonde-structive electric test. The purchaser may specify which test isto be used.13. Surface Condition13.1 The finished tubes shall be free of scale. A slightamount of oxidation shall not be considered as scale.14. Forming Operations14.1 When inserted in a boiler or heat exchanger, tubes shallbe capable of withstanding expanding and beading withoutshowing cracks or flaws, or opening at the weld. Whenproperly manipulated, superheater tubes shall withstand allforging, welding, and bending operations necessary for appli-cations without developing defects.15. Product Marking15.1 Marking shall be in accordance with SpecificationA450/A450M.15.2 The manufacturer’s name or symbol may be placedpermanently on each tube by rolling or light stamping beforenormalizing. If a single stamp is placed on the tube by hand,this mark should not be less than 8 in. [200 mm] from one endof the tube.15.3 Bar CodingIn addition to the requirements in 15.1and 15.2, bar coding is acceptable as a supplemental identifi-cation method. The purchaser may specify in the order aspecific bar coding system to be used.16. Keywords16.1 automatic welded steel tube; boiler tube; carbon; steeltube; welded steel tubeSUPPLEMENTARY REQUIREMENTSThe following supplementary requirements may become part of the specification when specified inthe inquiry or invitation to bid, and production order or contract. These requirements shall not beconsidered unless specified in the order and the necessary tests shall be made at the mill.S1. Additional Testing of Welded Tubing for ASME Re-quirementsS1.1 The weld seam of each tube shall be subjected to anultrasonic inspection employing Practice E273 or PracticeE213 with the rejection criteria referenced in SpecificationA450/A450M.S1.2 If Practice E273 is employed, a 100 volumetricinspection of the entire length of each tube shall also beperformed using one of the nondestructive electric tests per-mitted by Specification A450/A450M.S1.3 The test methods described in the supplement may notbe capable of inspecting the end portions of tubes. Thiscondition is referred to as end effect. This portion, as deter-mined by the manufacturer, shall be removed and discarded.S1.4 In addition to the marking prescribed in SpecificationA450/A450M, “S1” shall be added after the grade designation.TABLE 3 Minimum Elongation ValuesWall ThicknessElongation in 2 in. or50 mm, 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.A1020/A1020M − 02 20123Copyright by ASTM Intl all rights reserved;ASTM International takes no position respecting the validity of any patent rights asserted in connection with any item mentionedin this standard. Users of this standard are expressly advised that determination of the validity of any such patent rights, and the riskof infringement of such rights, are entirely their own responsibility.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 addressed to ASTM International Headquarters. Your comments will receive careful consideration at a meeting of theresponsible technical committee, which you may attend. If you feel that your comments have not received a fair hearing you shouldmake your views known to the ASTM Committee on Standards, at the 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 websitewww.astm.org. Permission rights to photocopy the standard may also be secured from the ASTM website www.astm.org/COPYRIGHT/.A1020/A1020M − 02 20124Copyright by ASTM Intl all rights reserved;

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