1、Designation: B 68 02Standard Specification forSeamless Copper Tube, Bright Annealed1This standard is issued under the fixed designation B 68; the number immediately following the designation indicates the year of originaladoption or, in the case of revision, the year of last revision. A number in pa
2、rentheses indicates the year of last reapproval. A superscriptepsilon (e) 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 requirements for brightannea
3、led seamless copper tube suitable for use in refrigeration,oil lines, gasoline lines, and so forth, where tube with aninterior surface essentially free from scale and dirt is required.1.1.1 Tubes made from any of the following Copper UNSNo. designations shall be supplied, unless otherwise specifiedi
4、n the contract 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 residual phosphorus1.2 Values
5、stated in inch-pound units are the standard exceptfor grain size, which is given in SI units.1.3 This specification is the companion to SI SpecificationB 68M; therefore, no SI equivalents are presented in thisspecification.1.4 The following hazard statement pertains only to the testmethod described
6、in Sections 20.5 and 21.2.6 of this specifi-cation: 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 reg
7、ulatory limitations prior to use.2. Referenced Documents2.1 ASTM Standards:B 68M Specification for Seamless Copper Tube, BrightAnnealed Metric3B 153 Test Method for Expansion (Pin Test) of Copper andCopper-Alloy Pipe and Tubing3B 251 Specification for General Requirements for WroughtSeamless Copper
8、and Copper-Alloy Tube3B 577 Test Methods for Detection of Cuprous Oxide (Hy-drogen Embrittlement Susceptibility) in Copper3B 601 Classification for Temper Designations for Copperand Copper AlloysWrought and Cast3B 846 Terminology for Copper and Copper Alloys3E 3 Guide for Preparation of Metallograph
9、ic Specimens4E 8 Test Methods for Tension Testing of Metallic Material4E 29 Practice for Using Significant Digits in Test Data toDetermine Conformance with Specifications5E 53 Test Methods for Determination of Copper in Unal-loyed Copper by Gravimetry6E 62 Test Methods for Chemical Analysis of Coppe
10、r andCopper Alloys (Photometric Methods)6E 112 Test Methods for Determining the Average GrainSize4E 243 Practice for Electromagnetic (Eddy-Current) Exami-nation of Copper and Copper-Alloy Tubes7E 255 Practice for Sampling Copper and Copper Alloys forDetermination of Chemical Composition6E 527 Practi
11、ce for Numbering Metals and Alloys (UNS)83. Terminology3.1 Definitions:3.1.1 See Terminology B 846 for definitions of terms relatedto copper and copper alloys.3.1.2 bright anneal, na thermal treatment carried out in acontrolled atmosphere so that surface oxidation is reduced to aminimum and the surf
12、ace remains relatively bright.3.2 Definitions of Terms Specific to This Standard:3.2.1 capable ofthe test need not be performed by theproducer of the material. However, if subsequent testing by thepurchaser establishes that the material does not meet theserequirements, the material shall be subject
13、to rejection.4. Ordering Information4.1 Include the following information in orders for prod-ucts:4.1.1 ASTM designation and year of issue (for example,B 68 95),1This specification is under the jurisdiction of ASTM Committee B05 on Copperand Copper Alloys and is the direct responsibility of Subcommi
14、ttee B05.04 on Pipeand Tube.Current edition approved Oct. 10, 2002. Published November 2002. Originallypublished as B 68 22T. Last previous edition B 68 99.2Refer to Practice E 527 for explanation of unified numbering system (UNS).3Annual Book of ASTM Standards, Vol 02.01.4Annual Book of ASTM Standa
15、rds, Vol 03.01.5Annual Book of ASTM Standards, Vol 14.02.6Annual Book of ASTM Standards, Vol 03.06.7Annual Book of ASTM Standards, Vol 03.03.8Annual Book of ASTM Standards, Vol 01.01.1*A Summary of Changes section appears at the end of this standard.Copyright ASTM International, 100 Barr Harbor Driv
16、e, PO Box C700, West Conshohocken, PA 19428-2959, United States.4.1.2 UNS copper number (for example, C10200),4.1.3 Temper (Section 8),4.1.4 Dimensions, diameter, and wall thickness (Section16),4.1.5 How furnished: straight lengths or coils,4.1.6 Total length, or number of pieces, of each size,4.1.7
17、 Total weight, each size, and4.1.8 When product is purchased for agencies of the U.S.Government.4.2 The following options are available and shall be speci-fied at the time of placing the order, when required:4.2.1 Electromagnetic (eddy-current) test,4.2.2 Embrittlement test,4.2.3 Expansion test,4.2.
18、4 Flattening test,4.2.5 Certification, and4.2.6 Mill test report.5. General Requirements5.1 The following sections of Specification B 251 are a partof this specification.5.1.1 Terminology, General,5.1.2 Material and Manufacture,5.1.3 Workmanship, Finish, and Appearance,5.1.4 Significance of Numerica
19、l Limits,5.1.5 Inspection,5.1.6 Rejection and Rehearing,5.1.7 Certification,5.1.8 Test Reports,5.1.9 Packaging and Package Marking, and5.1.10 Supplementary Requirements.5.2 In addition, when a section with an identical title tothose referenced in 5.1 appears in this specification, suchsection may co
20、ntain requirements which supersede thoseappearing in Specification B 251. In case of conflict, thisspecification prevails.6. Materials and Manufacture6.1 Materials:6.1.1 The material of manufacture shall be billets, bars, ortube of the Copper UNS No. C10200, C10300, C10800,C12000, or C12200 and shal
21、l be of such soundness as to besuitable for processing into the tubular products described.6.2 Manufacture:6.2.1 The tube shall be manufactured by such hot- orcold-working processes as to produce a homogeneous uniformwrought structure in the finished product. The tube shall becold drawn to the finis
22、hed size and wall thickness and shall bebright annealed to meet the specified temper.7. Chemical Composition7.1 The material shall conform to the requirements pre-scribed in Table 1 for the specified copper.7.2 These specification limits do not preclude the presenceof other elements. It is not prohi
23、bited to establish limits forunnamed elements and to require analysis by agreementbetween the manufacturer or supplier and the purchaser.8. Temper8.1 The tube shall be furnished in either of two annealedtempers as follows:Annealed (O) Temper DesignationO50 (Light annealed)O60 (Soft annealed)8.1.1 Te
24、mpers are defined in Classification B 601.9. Grain Size9.1 Tube in the tempers O50 (light annealed) and O60 (softannealed) 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 30ksi when tested
25、 in accordance with Test Methods E 8.10.2 Elongation:10.2.1 The tensile elongation of the tube shall be a mini-mum 40 % (2-in. gage length) when tested in accordance withTest Methods E 8.11. Performance Requirements11.1 Expansion Test:11.1.1 When specified in the contract or purchase order, theoutsi
26、de diameter of the tube furnished shall be capable of beingexpanded as follows when tested in accordance with TestMethod B 153.Outside Diameter, in. Expansion, %34 and under 40over34 3011.1.1.1 The expanded tube shall show no cracks or rupturesseen through visual inspection without the use of specia
27、lequipment or enhancement excepting the use of correctivelenses.11.1.2 A flattening test is an optional alternative to theexpansion test for annealed tube over 4 in. in diameter.11.2 Flattening Test:11.2.1 When specified in the contract or purchase order, thetube shall be capable of being flattened
28、in accordance with theTABLE 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 0.0040.012 0.0150.040AOxygen in C10200 shall be 10 ppm max.BSilver count
29、ing as copper.B68022method described in 21.2.6.1 and shall contain no cracks orflaws visible to the unaided eye in the flattened section.12. Microscopical Examination12.1 Samples of Copper UNS Nos. C10200, C10300, andC12000 shall be free of cuprous oxide as determined byProcedure A of Test Methods B
30、 577. When Copper UNS Nos.C10800 or C12200 are supplied, examination is not required.In case of a dispute, a referee method shall be used inaccordance with Procedure C of Test Methods B 577.13. Hydrogen Embrittlement13.1 Samples of Copper UNS Nos. C10200, C12000, andC12200 shall be capable of passin
31、g the embrittlement test ofProcedure B of Test Methods B 577. The actual performance ofthis test is not mandatory under the terms of this specificationunless definitely specified in the ordering information. In caseof a dispute, a referee method shall be used in accordance withProcedure C of Test Me
32、thods B 577.14. Nondestructive Testing14.1 Upon agreement between the manufacturer and thepurchaser, each tube up to 318 in. in outside diameter shall besubjected to electromagnetic (eddy-current) test. For this test,the tube shall be examined in the final drawn or annealedtemper, before coiling or
33、in straight lengths before final anneal.14.2 Electromagnetic (Eddy-Current) Test:14.2.1 When examined in accordance with Practice E 243,tubes that do not actuate the signaling device of the testing unitshall be considered as conforming to the requirements of thetest.15. Purchases for U.S. Government
34、 Agencies15.1 When the contract or purchase order stipulates thepurchase is for an agency of the U.S. Government, the tubesfurnished shall conform to the conditions specified in theSupplementary Requirements of Specification B 251.16. Dimensions and Permissible Variations16.1 The dimensions and tole
35、rances for product covered bythis specification shall be as specified in the following tablesand related paragraphs of Specification B 251:16.1.1 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 Squareness of Cu
36、tsection.16.2 Coils, Length TolerancesRefer to Table 2, Table 3,Table 4, and Table 5 of this specification.17. Workmanship, Finish, and Appearance17.1 Workmanship:17.1.1 The tube furnished shall be clean, free of dirt, scale,and other defects, but blemishes of a nature that do notinterfere with the
37、intended application are acceptable.17.1.2 The tube shall be bright annealed after the lastdrawing operation or, when required, after coiling.17.2 Finish and Appearance:17.2.1 The interior and exterior surfaces of the tube shall betypical in appearance to that of bright annealed copper.18. Sampling1
38、8.1 The lot size, portion size, and selection of sampleportions shall be as follows:18.1.1 Lot SizeThe lot size shall be 10 000 lb or fractionthereof.18.1.2 Portion SizeSample portions shall be selected as tobe representative of the lot according to the following sched-ule:Number of Pieces in LotNum
39、ber of Sample Portions to BeTakenA1to50 151 to 200 2201 to 1500 3Over 1500 0.2 % of the total number of pieces inthe lot, but not to exceed 10 pieces_AEach sample portion shall be taken from a separate tube.18.1.2.1 In case of tube furnished in coils, a length sufficientfor all necessary tests shall
40、 be cut from each coil selected fortesting. The remaining portion of the selected coils shall beincluded in the shipment and the permissible variation in lengthon such coils shall be waived.18.2 Chemical Composition:TABLE 2 Average Grain Size RequirementsTemper Grain Size, mmO50 0.015 to 0.040O60 0.
41、040, minTABLE 3 Coil Length Tolerances (Specific Lengths)Tube Outside Diameter, in.Tolerances, in., All Plus, for NominalLengths in FeetUp to 50, incl Over 50 to 100, inclUp to 2, incl 12 24TABLE 4 Coil Length Tolerances (Mill Lengths)(Applicable only full-length pieces)Tube OutsideDiameter, in.Tole
42、rances, %, for Nominal Lengths in FeetUp to 100, incl Over 100 to 2000, inclUp to 1, incl 5Aor 2 ft, whichever isgreater10AOver 1 to 2, incl 5Aor 2 ft, whichever isgreaterNo tolerancesestablishedAExpressed to the nearest 1 ft.TABLE 5 Coil Schedule of Mill Lengths with EndsTube OutsideDiameter, in.No
43、minalLength, ftShortestPermissibleLength, % ofNominal LengthMaximum Permis-sible Weights ofEnds, % of LotWeightUp to 1, incl up to 100, incl 70A10Over 1, to 2, incl up to 100, incl 60A20Up to 1, incl over 100 to2000, incl50 50BAExpressed to the nearest 1 ft.BShort pieces shall, at the option of the
44、supplier, be included as follows: up to10 % of lot weight between 50 ft and one quarter of full length and up to 40 %between one quarter and full length.B6802318.2.1 The composite sample shall be prepared from ap-proximate equal weights taken from the sample portions andprepared in accordance with P
45、ractice E 255. The minimumweight of the composite sample shall be 150 g.18.2.2 The manufacturer shall have the option of samplingat the time castings are poured or from the semifinishedproduct. When composition has been determined during themanufacturing process, sampling of the finished product is
46、notrequired.18.2.3 When sampled at the time castings are poured, atleast two samples shall be taken, one after the start and onenear the end of the pour, for each group of castings pouredsimultaneously from the same source of molten metal.18.2.4 When samples are taken from the semifinished prod-uct,
47、 a sample shall be taken to represent each 10 000 lb orfraction thereof, except that not more than one sample perpiece shall be required.19. Number of Tests and Retests19.1 Tests:19.1.1 Chemical CompositionShall be determined as thearithmetic mean of results from at least two replicate determi-natio
48、ns for each specified element.19.1.2 Tensile, Elongation, and Grain SizeShall be re-ported as the average of results from test specimens and eachspecimen must conform to specification requirements.19.1.3 Other TestsAt least two specimens shall be pre-pared for each of the other tests and each must m
49、eet testrequirements.19.2 Retest:19.2.1 When test results obtained by the purchaser fail toconform with the product specification requirement(s), themanufacturer or supplier shall have the option to perform aretest.19.2.2 Retesting shall be as directed in this specification forthe initial test except for the number of test specimens whichshall be twice that normally required for the test.19.2.3 Test results for all specimens shall conform to therequirement(s) of this specification in retest and failure tocomply shall be cause for lot rejection.20
