1、Designation:B6802 Designation: B68/B68M 11Standard Specification forSeamless Copper Tube, Bright Annealed1This standard is issued under the fixed designation B68/B68M; the number immediately following the designation indicates the year oforiginal adoption or, in the case of revision, the year of las
2、t revision. A number in parentheses indicates the year of last reapproval. Asuperscript epsilon () indicates an editorial change since the last revision or reapproval.This standard has been approved for use by agencies of the Department of Defense.1. Scope*1.1 This specification establishes the requ
3、irements for bright annealed seamless copper tube suitable for use in refrigeration, oillines, gasoline lines, and so forth, where tube with an interior surface essentially free from scale and dirt is required.1.1.1 Tubes made from any of the following Copper UNS No. designations shall be supplied,
4、unless otherwise specified in thecontract or purchase order:Copper UNS No.2Type of CopperC10200 Oxygen-free without residual deoxidantsC10300 Oxygen-free, extra low phosphorusC10800 Oxygen-free, low phosphorusC12000 Phosphorus deoxidized, low residual phosphorusC12200 Phosphorus deoxidized, high res
5、idual phosphorus1.2Values stated in inch-pound units are the standard except for grain size, which is given in SI units.1.3This specification is the companion to SI Specification B68M; therefore, no SI equivalents are presented in this specification.1.4The following hazard statement pertains only to
6、 the test method described in Sections 20.5 and 21.2.6 of this specification:This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of theuser of this standard to establish appropriate safety and health practices and determine
7、the applicability of regulatory limitationsprior to use.1.2 UnitsThe values stated in either SI units or inch-pound units are to be regarded separately as standard. The values statedin each system may not be exact equivalents; therefore, each system shall be used independently of the other. Combinin
8、g valuesfrom the two systems may result in non-conformance with the standard.1.3 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibilityof the user of this standard to establish appropriate safety and health practices and determ
9、ine the applicability of regulatorylimitations prior to use.2. Referenced Documents2.1 ASTM Standards:3B68MSpecification for Seamless Copper Tube, Bright Annealed (Metric)B153 Test Method for Expansion (Pin Test) of Copper and Copper-Alloy Pipe and TubingB251 Specification for General Requirements f
10、or Wrought Seamless Copper and Copper-Alloy TubeB251M Specification for General Requirements for Wrought Seamless Copper and Copper-Alloy Tube (Metric)B577 Test Methods for Detection of Cuprous Oxide (Hydrogen Embrittlement Susceptibility) in CopperB601 Classification for Temper Designations for Cop
11、per and Copper AlloysWrought and CastB846 Terminology for Copper and Copper AlloysB968/B968M Test Method for Flattening of Copper and Copper-Alloy Pipe and TubeE3 Guide for Preparation of Metallographic SpecimensE88/E8M Test Methods for Tension Testing of Metallic MaterialsE29 Practice for Using Sig
12、nificant Digits in Test Data to Determine Conformance with SpecificationsE53 Test Method for Determination of Copper in Unalloyed Copper by Gravimetry1This specification is under the jurisdiction of ASTM Committee B05 on Copper and Copper Alloys and is the direct responsibility of Subcommittee B05.0
13、4 on Pipe andTube.Current edition approved Oct. 10, 2002. Published November 2002. Originally published as B6822T. Last previous edition B6899. DOI: 10.1520/B0068-02.Current edition approved Feb. 15, 2011. Published March 2011. Originally approved in 1922. Last previous edition approved in 2002 as B
14、68 02. DOI:10.1520/B0068_B0068M-11.2Refer to Practice E527 for explanation of unified numbering system (UNS).3For referencedASTM standards, visit theASTM website, www.astm.org, or contactASTM Customer Service at serviceastm.org. For Annual Book of ASTM Standardsvolume information, refer to the stand
15、ards Document Summary page on the ASTM website.1This document is not an ASTM standard and is intended only to provide the user of an ASTM standard an indication of what changes have been made to the previous version. Becauseit may not be technically possible to adequately depict all changes accurate
16、ly, ASTM recommends that users consult prior editions as appropriate. In all cases only the current versionof the standard as published by ASTM is to be considered the official document.*A Summary of Changes section appears at the end of this standard.Copyright ASTM International, 100 Barr Harbor Dr
17、ive, PO Box C700, West Conshohocken, PA 19428-2959, United States.E62 Test Methods for Chemical Analysis of Copper and Copper Alloys (Photometric Methods)E112 Test Methods for Determining Average Grain SizeE243 Practice for Electromagnetic (Eddy-Current) Examination of Copper and Copper-Alloy TubesE
18、255 Practice for Sampling Copper and Copper Alloys for the Determination of Chemical CompositionE527 Practice for Numbering Metals and Alloys in the Unified Numbering System (UNS) Practice for Numbering Metals andAlloys in the Unified Numbering System (UNS)E2575 Test Method for Determination of Oxyg
19、en in Copper and Copper Alloys3. General Requirements3.1 The following sections of Specification B251 or B251M are a part of this specification.3.1.1 Terminology, General,3.1.2 Material and Manufacture,3.1.3 Workmanship, Finish, and Appearance,3.1.4 Significance of Numerical Limits,3.1.5 Inspection,
20、3.1.6 Rejection and Rehearing,3.1.7 Certification,3.1.8 Test Reports,3.1.9 Packaging and Package Marking, and3.1.10 Supplementary Requirements.3.2 In addition, when a section with an identical title to those referenced in 3.1 appears in this specification, such section maycontain requirements which
21、supersede those appearing in Specification B251 or B251M. In case of conflict, this specificationprevails.4. Terminology3.14.1 Definitions:3.1.1See Terminology4.1.1 See Terminology B846 for definitions of terms related to copper and copper alloys.3.1.24.1.2 bright anneal, na thermal treatment carrie
22、d out in a controlled atmosphere so that surface oxidation is reduced to aminimum and the surface remains relatively bright.3.2Definitions of Terms Specific to This Standard:3.2.1capable ofthe test need not be performed by the producer of the material. However, if subsequent testing by the purchaser
23、establishes that the material does not meet these requirements, the material shall be subject to rejection.4.the surface obtained by annealing under conditions of controlled atmosphere to prevent oxidation and to retain theoriginal luster of the product.5. Ordering Information4.1Include the followin
24、g information in orders for products:4.1.1ASTM designation and year of issue (for example, B6895),4.1.2UNS copper number (for example, C10200),4.1.3Temper (Section5.1 Include the following information when placing orders for products under this specification, as applicable:5.1.1 ASTM designation and
25、 year of issue (for example, B68/B68M 11),5.1.2 UNS copper number (for example, C10200),5.1.3 Temper (Section 8),45.1.4 Dimensions, diameter, and wall thickness (Section 16),4.1.5How furnished: straight lengths or coils,4.1.6Total length, or number of pieces, of each size,4.1.7Total weight, each siz
26、e, and4.1.8When product is purchased for agencies of the U.S. Government.4.2The following options are available and shall be specified at the time of placing the order, when required:4.2.1Electromagnetic (eddy-current) test,4.2.2Embrittlement test,4.2.3Expansion test,4.2.4Flattening test,4.2.5Certif
27、ication, andB68/B68M 1124.2.6Mill test report.5.General Requirements5.1The following sections of Specification B251 are a part of this specification.5.1.1Terminology, General,5.1.2Material and Manufacture,5.1.3Workmanship, Finish, and Appearance,5.1.4Significance of Numerical Limits,5.1.5Inspection,
28、5.1.6Rejection and Rehearing,5.1.7Certification,5.1.8Test Reports,5.1.9Packaging and Package Marking, and5.1.10Supplementary Requirements.5.2In addition, when a section with an identical title to those referenced in 5.1 appears in this specification, such section maycontain requirements which supers
29、ede those appearing in Specification B251. In case of conflict, this specification prevails.5.1.5 How furnished: straight lengths or coils,5.1.6 Total length, or number of pieces, of each size,5.1.7 Total weight, each size, and5.1.8 When product is purchased for agencies of the U.S. Government.5.2 T
30、he following options are available and shall be specified at the time of placing the order, when required:5.2.1 Electromagnetic (eddy-current) test,5.2.2 Embrittlement test,5.2.3 Expansion test,5.2.4 Flattening test,5.2.5 Certification, and5.2.6 Mill test report.6. Materials and Manufacture6.1 Mater
31、ials:6.1.1 The material of manufacture shall be billets, bars, or tube of the Copper UNS No. C10200, C10300, C10800, C12000,or C12200 and shall be of such soundness as to be suitable for processing into the tubular products described.6.2 Manufacture:6.2.1 The tube shall be manufactured by such hot-
32、or cold-working processes as to produce a homogeneous uniform wroughtstructure in the finished product. The tube shall be cold drawn to the finished sizediameter and wall thickness, and shall be brightannealed to meet the specified temper.7. Chemical Composition7.1 The material shall conform to the
33、chemical composition requirements prescribed in Table 1 for the specified copper.7.2These specification limits do not preclude the presence of other elements. It is not prohibited to establish limits for unnamedelements and to require analysis by agreement between the manufacturer or supplier and th
34、e purchaser. for the specified copperalloy UNS No. designation specified in the ordering information.7.2 These composition limits do not preclude the presence of other elements. By agreement between the manufacturer and thepurchaser, limits may be established and analysis required for unnamed elemen
35、ts.8. Temper8.1 The tube shall be furnished in either of two annealed tempers as follows:TABLE 1 Chemical CompositionElementComposition, %Copper UNS No.C10200AC10300 C10800 C12000 C12200Copper,Bmin 99.95 . . 99.90 99.9CopperB+ phosphorus,min. 99.95 99.95 . .Phosphorus . 0.0010.005 0.0050.012 0.0040.
36、012 0.0150.040AOxygen in C10200 shall be 10 ppm max. in accordance with E2575.BSilver counting as copper.B68/B68M 113Annealed (O) Temper DesignationO50 (Light annealed)O60 (Soft annealed)8.1.1 Tempers are defined in Classification B601.9. Grain Size9.1 Tube in the tempers O50 (light annealed) and O6
37、0 (soft annealed) shall conform to the requirements of Table 2.10. Mechanical Property Requirements10.1 Tensile Strength:10.1.1 The tube shall have a minimum tensile strength of 30 ksi (210 MPa) when tested in accordance with Test MethodsE8/E8M.10.2 Elongation:10.2.1 The tensile elongation of the tu
38、be shall be a minimum 40 % (2-in. or 50 mm gage length) when tested in accordance withTest Methods E8/E8M.11. Performance Requirements11.1 Expansion Test:11.1.1 When specified in the contract or purchase order, the outside diameter of the tube furnished shall be capable of beingexpanded as follows w
39、hen tested in accordance with Test Method B153.Outside Diameter, in. Expansion, %Outside Diameter, in. (mm) Expansion, %34 and under 4034 (19) and under 40over34 30over34 (19) 3011.1.1.1 The expanded tube shall show no cracks or ruptures seen through visual inspection without the use of specialequip
40、ment or enhancement excepting the use of corrective lenses.11.1.2 A flattening test is an optional alternative to the expansion test for annealed tube over 4 in. (100 mm) in diameter.11.2 Flattening Test:11.2.1When specified in the contract or purchase order, the tube shall be capable of being flatt
41、ened in accordance with themethod described in 21.2.6.1 and shall contain no cracks or flaws visible to the unaided eye in the flattened section.11.2.1 When specified in the contract or purchase order, the tube shall be capable of being flattened in accordance with the testmethod described in B968/B
42、968M.12. Microscopical Examination12.1 Samples of Copper UNS Nos. C10200, C10300, and C12000 shall be free of cuprous oxide as determined by ProcedureA of Test Methods B577. When Copper UNS Nos. C10800 or C12200 are supplied, examination is not required. In case of adispute, a referee method shall b
43、e used in accordance with Procedure C of Test Methods B577.13. Hydrogen Embrittlement13.1 Samples of Copper UNS Nos. C10200, C12000, and C12200 shall be capable of passing the embrittlement test ofProcedure B ofTest Methods B577.The actual performance of this test is not mandatory under the terms of
44、 this specification unlessdefinitely specified in the ordering information. In case of a dispute, a referee method shall be used in accordance with ProcedureC of Test Methods B577.14. Nondestructive Testing14.1 Upon agreement between the manufacturer and the purchaser, each tube up to 318 in. (80 mm
45、) in outside diameter shallbe subjected to electromagnetic (eddy-current) test. For this test, the tube shall be examined in the final drawn or annealed temper,before coiling or in straight lengths before final anneal. lengths.14.2 Electromagnetic (Eddy-Current) Test:14.2.1 When examined in accordan
46、ce with Practice E243, tubes that do not actuate the signaling device of the testing unit shallbe considered as conforming to the requirements of the test.TABLE 2 Average Grain Size RequirementsTemper Grain Size, mmO50 0.015 to 0.040O60 0.040, minB68/B68M 11415. Purchases for U.S. Government Agencie
47、s15.1 When the contract or purchase order stipulates the purchase is for an agency of the U.S. Government, the tubes furnishedshall conform to the conditions specified in the Supplementary Requirements of Specification B251 or B251M.16. Dimensions and Permissible Variations16.1 The dimensions and to
48、lerances for product covered by this specification shall be as specified in the following tables andrelated paragraphs of Specification B251 or B251M:16.1.1 Wall Thickness ToleranceTable 1.16.1.2 Diameter TolerancesTable 3.16.1.3 Length TolerancesTables 5 and 6.16.1.4 Squareness of CutRefer to Squar
49、eness of Cut section 5.6.16.2 Coils, Length TolerancesRefer to Table 2, Refer to Table 3, Table 4, and Table 5 of this specification.17. Workmanship, Finish, and Appearance17.1 Workmanship:17.1.1The17.1.1 The tube furnished shall be clean, free of dirt, scale, and other defects, but blemishes of a nature that do notinterfere with the intended application are acceptable.17.1.2 The tube shall be bright annealed after the last drawing operation or, when required, after coiling.17.2 Finish and Appearance:17.2.1 The interior and exterior surfaces of the tub
