ASTM_B_956-19.pdf

This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for theDevelopment of International Standards,Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade(TBT)Committee.Designation:B956-191ATIONALStandard Specification forWelded Copper and Copper-Alloy Condenser and HeatExchanger Tubes with Integral Fins1This standard is issued under the fixed designation B956:the number immediately following the designation indicates the year oforiginal adoption or.in the case of revision,the year of last revision.A number in parentheses indicates the year of last reapproval.Asuperscript epsilon(e)indicates an editorial change since the last revision or reapproval.NOTE-Footnote I was editorially corrected in November 2019.1.Scope*1.5 The following safety hazard caveat pertains only to the1.1 This specification establishes the requirements for heattest methods described in this specification.This standard doesexchanger tubes manufactured from forge-welded copper andnot purport to address all of the safety concerns.if any.copper alloy tubing in straight lengths on which the external orassociated with its use.It is the responsibility of the user of thisinternal surface,or both,has been modified by cold formingstandard to establish appropriate safery,health,and environ-process to produce an integral enhanced surface for improvedmental practices and determine the applicability of regulatoryheat transfer.limitations prior to use.1.6 Warning-Mercury has been designated by many regu-1.2 The tubes are typically used in surface condensers,latory agencies as a hazardous substance that can causeevaporators,and heat exchangers.serious medical issues.Mercury,or its vapor,has been1.3 The product shall be produced of the following coppersdemonstrated to be hazardous to health and corrosive toor copper alloys,as specified in the ordering information.materials.Use caution when handling mercury and mercury-Copper or Copper Alloycontaining products.See the applicable product Safery DataUNS No.Type of MetalSheet(SDS)for additional information.The potential existsC120004DLP Phosphorized,low residual phosphorusthat selling mercury or mercury-containing products,or both,C122004DHP Phosphorized,high residual phosphorusis prohibited by local or national law.Users must determineC19200Phosphorized,1%ironlegality of sales in their location.C19400Copper-Iron AlloyC23000Red Brass1.7 This international standard was developed in accor-C44300Admiralty.arsenicaldance with internationally recognized principles on standard-C44400Admiralty.antimonialC44500Admiralty,phosphorizedization established in the Decision on Principles for theC68700Aluminum BrassDevelopment of International Standards,Guides and Recom-C7040095-5 Copper-Nickelmendations issued by the World Trade Organization TechnicalC7060090-10 Copper-NickelC7062090-10 Copper-Nickel(Modified for Welding)Barriers to Trade(TBT)Committee.C7100080-20 Copper-NickelC7150070-30 Copper-Nickel2.Referenced DocumentsC7152070-30 Copper-Nickel(Modified for Welding)C72200Copper-Nickel2.1 ASTM Standards:2B153 Test Method for Expansion(Pin Test)of Copper and4 Copper UNS Nos.C12000 and C12200 are classified in Classification B224.Copper-Alloy Pipe and TubingNoTE 1-Designations listed in Classification B224.B154 Test Method for Mercurous Nitrate Test for CopperAlloys1.4 Units-The values stated in inch-pound units are to beB224 Classification of Coppersregarded as standard.The values given in parentheses areB359/B359M Specification for Copper and Copper-Alloymathematical conversions to SI units that are provided forSeamless Condenser and Heat Exchanger Tubes Withinformation only and are not considered standard.Integral FinsB543/B543M Specification for Welded Copper and Copper-This specification is under the jurisdiction of ASTM Committee B05 on CopperAlloy Heat Exchanger Tubeand Copper Alloys and is the direct responsibility of Subcommittee B05.04 on Pipeand Tube.Current edition approved Oct.1.2019.Published October 2019.Originally2 For referenced ASTM standards,visit the ASTM website,www.astm.org,orapproved in 2007.Last previous edition approved in 2010 as B956/B956M-10contact ASTM Customer Service at serviceastm.org.For Annual Book of A.STMwhich was withdrawn January 2019 and reinstated in October 2019.DOl:Standards volume information,refer to the standards Document Summary page on10.1520/B0956-19E01.the ASTM website.A Summary of Changes section appears at the end of this standardCopyrightASTM Intemational,100 Barr Harbor Drive,PO Box C700.West Conshohocken.PA 19428-2959.United States4B956-191B601 Classification for Temper Designations for Copper and3.2.1 enhanced tube-tube having a series of metallic ribsCopper Alloys-Wrought and Caston the outside or inside surface,or both,either parallel to theB846 Terminology for Copper and Copper Alloyslongitudinal axis or circumferentially extended from the tube toB858 Test Method for Ammonia Vapor Test for Determiningincrease the effective surface for heat transfer(Figs.1-3).Susceptibility to Stress Corrosion Cracking in Copper3.2.2 unenhanced tube-tube made by processing strip intoAlloysa tubular shape and forge welding the edges to make aB968/B968M Test Method for Flattening of Copper andlongitudinal seam with no enhancements on the O.D.or I.D.Copper-Alloy Pipe and TubeE8/E8M Test Methods for Tension Testing of Metallic Ma-4.Types of Welded TubeterialsE29 Practice for Using Significant Digits in Test Data to4.1 Reference Specification B543/B543M for the types ofDetermine Conformance with Specificationsforge welded tube products that will be supplied for theE53 Test Method for Determination of Copper in Unalloyedenhancing operation(Section 6).Copper by GravimetryE54 Test Methods for Chemical Analysis of Special Brasses5.Ordering Informationand Bronzes(Withdrawn 2002)35.1 Include the following information when placing ordersE62 Test Methods for Chemical Analysis of Copper andfor product under this specification as applicable:Copper Alloys(Photometric Methods)(Withdrawn 2010)5.1.1 ASTM designation and year of issue;E112 Test Methods for Determining Average Grain Size5.1.2 Copper UNS No.designation(for example,CopperE118 Test Methods for Chemical Analysis of Copper-UNS No.C12000):Chromium Alloys(Withdrawn 2010)35.1.3 Tube type(Section 4):E243 Practice for Electromagnetic(Eddy Current)Examina-5.1.4 Temper(Section 8);tion of Copper and Copper-Alloy Tubes5.1.5 Dimensions,the diameter,wall thickness,whetherE255 Practice for Sampling Copper and Copper Alloys forminimum or nominal wall,and length(Section 14);the Determination of Chemical Composition5.1.6 Configuration of enhanced surfaces shall be agreeE478 Test Methods for Chemical Analysis of Copper Alloysupon between the manufacturer and the purchaser(Figs.1-3);2.2 ASME Code:andASME Boiler and Pressure Vessel Code5.1.7 Quantity3.Terminology5.2 The following options are available but may not beincluded unless specified at the time of placing of the order3.1 For the definitions of terms related to copper and copperwhen required:alloys,refer to Terminology B846.5.2.1 Heat identification or traceability details(6.1.2);3.2 Definitions of Terms Specific to This Standard:5.2.2 Electromagnetic(eddy current)examination;5.2.3 Embrittlement test(12.1):5.2.4 Expansion test(11.1);5.2.5 Flattening test(11.2):3The last approved version of this historical standard is referenced onwww.astm.org.5.2.6 Reverse bend test(11.3);4 Available from American Society of Mechanical Engineers(ASME).ASME5.2.7 Certification(Section 23):Interational Headquarters.Two Park Ave.New York.NY 10016-5990.http:/5.2.8 Mill Test Reports;www.asme.org.d-Outside Diameter ofUnenhanced Sectiond-Outside Diameter ofthe Enhanced Sectiond,Root Diameter ofthe Enhanced Sectiond-Inside Diameter ofthe Enhanced SectionXp-Wall Thickness ofthe Unenhanced Sectionx-Wall Thickness ofthe Unenhanced Sectiont-Transition TaperNorE 1-The outside diameter over the enhanced section will not normally exceed the outside diameter of the unenhanced sectionFIG.1 Outside Diameter Enhanced Tube Nomenclature24B956-19e1d-Outside Diameter ofUnenhanced Sectiond-Outside Diameter over theEnhanced Sectiond,-Root diameter of the EnhancedSectiondi-Inside Diameter of the EnhancedSectionXp-Wall Thickness of theUnenhanced Sectionx-Wall Thickness of theEnhanced Sectiontt-Transition TaperFIG.2 Outside Diameter and Inside Diameter Enhanced Tube NomenclatureBOTTOM WALLRIDGE HEIGHTHELIX ANGLEFIG.3 Inside Diameter Enhanced Tube Nomenclature5.2.9 If product is purchased for agencies of the U.S.7.Chemical CompositionGovernment(see the Supplementary Requirements section of(this specification or the general requirements section for7.1 The material shall conform to the chemical composi-additional requirements,if specified):andtional requirements in Table I for Copper UNS No.designation5.2.10 If product is ordered for ASME Boiler and Pressurespecified in the ordering information.Vessel Code Application(see Certification Section 23).7.2 The composition limits do not preclude the presence ofother elements.By agreement between the manufacturer and6.Materials and Manufacturepurchaser,limits may be established and analysis required for6.1 Material:unnamed elements.6.1.1 The material of manufacture shall be welded tube of7.2.1 Copper Alloy C19200 and C19400-Copper may beone of the Copper Alloy UNS Nos.listed in 1.1 of such puritytaken as the difference between the sum of results for alland soundness as to be suitable for processing into the productsspecified elements and 100%.When all elements specified,prescribed herein.including copper,are determined,their sum shall be 99.86.1.2 When specified in the contract or purchase order thatminimum.heat identification or traceability is required,the purchaser7.2.2 For alloys in which copper is specified as theshall specify the details desired.remainder,copper may be taken as the difference between the6.2 Manufacture:sum of the results for all specified elements and 100%for the6.2.1 The product shall be manufacture by cold forming theparticular alloy.enhancement of the heat transfer surfaces.7.2.2.1 When analyzed,copper plus the sum of results for6.3 Product described by this specification shall typically bespecified elements shall conform with the requirements shownfurnished with unenhanced ends,but may be furnished within the following table:enhanced ends or stripped ends from which the O.D.enhance-Copper Plus Namedment has been removed by machining.Copper Alloy UNS No.Elements,min6.3.1 The enhanced sections of the tube in the as-fabricatedC7040099.5temper are in the cold formed condition produced by theC7060099.5enhancing operation.C7062099.5C7100099.56.3.2 The unenhanced sections of the tube shall be in theC715009.5annealed or as-welded temper,and shall be suitable for07152099.5rolling-in operations.C7220099.834B956-19e1TABLE 1 Chemical RequirementsCopper orComposition,%CopperNickelAlloyCopperTin AluminumLead,OtherinclIronZincmaxManganeseArsenic Antimony Phosphorus ChromiumNamedUNS No.CobaltElementsC1200099.90 min4年44年4440.004-0.012C1220099.9 min0.015-0.040C1920098.5min0.8-1.20.20 max有年年9年0.01-0.04年8C1940097.0 min0.032.1-2.60.050.200.0150.15C2300084.0-86.00.050.05 maxremainder卡4444C4430070.0-73.090.9-120.070.06 max remainder0.020.06C4440070.0-73.090.9-120.070.06 max remainder0.020.10C4450070.0-73.090.9120.070.06 maxremainder0.02-0.10C6870076.01.8-2.50.070.06 max remainder0.02-0.0679.0DC70400remain-4.86.20.0513-171.0 max0.300.8derA.oC70600remain-9.0-11.00.051.0-1.81.0 max1.0 maxderoC7062086.5 min.D9.0-11.00.021.0-1.80.50 max1.0 max0.02 max0.05 C max0.02 S maxC7100019.0-23.00.051.0 max1.0 max1.0 maxC71500remain29.0-33.00.050.40-1.01.0 max1.0 maxC7152065.0 min4.D29.0-33.00.020.40-1.00.50max1.0 max0.02 max0.05 C max0.02 S maxC72200remain-15.0-18.00.050.50-1.01.0max1.0 max0.30-0.70.03 Si maxderA.8E0.03 Ti maxCopper(including silver).Cu+Sum of Named Elements,99.8%min.c Cu Sum of Named Elements,99.6%min.Cu+Sum of Named Elements,99.5%minWhen the product is for subsequent welding applications,and so specified in the contract or purchase order,zinc shall be 0.50%max,lead 0.02%max,phosphorus0.02 max,sulfur 0.02 max,and carbon 0.05 max.7.2.3 For alloys in which zinc is specified as the remainder,8.3 Tubes of Copper Alloy UNS Nos.C12200.C19200.either copper or zinc may be taken as the difference betweenC19400.C70400.C70600.C71000.C71500.andC72200arethe sum of the results of specified elements analyzed andnormally supplied in the temper specified in the purchase order100%.without stress relief treatment.7.2.3.1 When all specified elements are determined,the sumNorE 2-Some tubes,when subjected to aggressive environments,mayof results plus copper shall be as follows:be subject to stress-corrosion cracking because of the residual tensileCopper Plus Namedstresses developed in the enhancing process.For such applications,it isCopper Alloy UNS No.Elements,suggested that tubes of Copper Alloy UNS Nos.C23000.C44300.%minC44400.C44500,and C68700 are subjected to a stress-relieving thermalC2300099.8treatment subsequent to the enhancement process.In Specification B359/C44300,C44400,C4450099.6B359M,the stress relief anneal is mandatory for brass alloys.C6870099.58.Temper9.Grain Size for Annealed Tempers8.1 Tempers,as defined in Classification B601 and this9.1 Samples of annealed temper tubes shall be examined atspecification,are as follows:a magnification of 75 diameters.The grain size shall be8.1.1 The tube,after enhancing.shall be supplied,asdetermined in the wall beneath the internal enhancement.specified,in the annealed(061)or as-fabricated temper.While there is not grain size range,the microstructure shall8.1.1.1 The enhanced sections of tubes in the as-fabricatedshow complete recrystallization and the weld zone shall have atemper are in the cold formed condition produced by thestructure typical of hot-forged welds.fabricating operation.8.1.1.2 The unenhanced sections of tubes in the as-10.Mechanical Property Requirementsfabricated temper are in the temper of the tube prior to10.1 Tensile Strength and Yield Strength Requirements:enhancing.welded and annealed(WO61),welded and light10.1.1 Product furnished under this specification shall con-cold-worked(WC55),and suitable for rolling-in operations.form to the tensile and yield strength requirements prescribed8.2 Tubes of Copper Alloy UNS Nos.C23000.C44300.in Table 2 when tested in accordance with Test MethodsC44400.C44500.and C68700 shall be furnished in theE8/E8M.annealed temper or the stress relieved condition as specified in10.1.2 Acceptance or rejection based upon mechanicalthe purchase order unless otherwise agreed upon between theproperties shall depend only on tensile strength and yieldpurchaser and the manufacturer.strength.4B956-19e1TABLE 2 Tensile RequirementsCooper orTemper DesignationTensile StrengthYield StrengthCopper AlloyminUNS No.StandardFormerksi(MPa)ksi(MPa)C12000.C12200WO61annealed30205)9162CC19200WO61annealed38(260)12(85)C19400WO61annealed4531015(105)WC55light cold-worked45(31022(152C23000WO61annealed40(275)12(85)C23000WC55light cold-worked42(290)20(138C44300.C44400.C44500WO61annealed45(310)15(105)C44300.C44400.C44500WC55light cold-worked50(345)35(241)C68700WO61annealed50(345)18(125C68700WC55light cold-workedC70400WO61annealed38(260)12(85)C70400WC55light cold-worked40(27530(207刀C70600WO61annealed40(275)15(105C70600WC55light cold-worked45310135(241)C70620WO61annealed40(275)15(105C70620WC55light cold-workedC71000WO61annealed45(310)16(110)C71000WC55light cold-worked50(34535(241C71500WO61annealed52(360)18(125C71500WC55light cold-worked54(37235(241C71520WO61annealed52(360)18(125)C71520WC55light cold-workedC72200WO61annealed45(310)16(110)C72200WC55light cold-worked50(345)30(207A ksi 1000 psi.At 0.5%extension under load.c Light straightening operation is permitted.o Where no properties are shown,strength requirements shall be as agreed upon between the purchaser and the manufacturer.11.Performance Requirements11.1.2 The expanded tube area shall be free of defects,but11.1 Expansion Test Requirements:blemishes of nature that do not interfere with the intended11.1.1 When specified in the contract or purchase order.application are acceptable.product in the annealed tempers and the light cold-worked11.2 Flattening Test:temper shall withstand expansion in accordance with Test11.2.1 When specified in the contract or purchase order,theMethod B153 and to the extent in Table 3.flattening test in accordance with Test Method B968/B968Mshall be performed.11.2.1.1 During inspection,the flattened areas of the testTABLE 3 Expansion Requirementsspecimen shall be free of defects,but blemishes of a nature thatdo not interfere with the intended application are acceptable.Expansion of TubeCopper orTemperCopper AlloyOutside Diameter.11.3 Reverse Bend Test:UNS No.in Percent of OriginalOutside Diameter11.3.1 When specified in the contract or purchase order,theAnnealedC1200030reverse bend test described in the test method section in 19.2.7C122000shall be performed on unenhanced tubes.C192000C19400211.3.2 The sample shall be free of defects,but blemishes ofC2300020nature that do not interfere with the intended application areC44300.C4440020acceptable.C44500C6870020C704003012.Other RequirementsC70600.70620C710003012.1 Mercurous Nitrate Test or Ammonia Vapor Test:C71500.C7152030C7220012.1.1 When specified in the contract or purchase order,30product in drawn tempers shall be tested for residual stress inLight cold-workedC1220020accordance with the requirements of Test Method B154 or TestC1940020C70400Method B858.and show no signs of cracking only for CopperC7060020Alloys Nos.C23000.C44300.C44400.C44500.C60800.andC71000C68700.(Warning-Mercury is a definite health hazard.WithC7150028the Mercurous Nitrate Test,equipment for the detection andC716402C72200removal of mercury vapor produced in volatilization,and theuse of protective gloves is recommended.)