1、Designation: B743 12Standard Specification forSeamless Copper Tube in Coils1This standard is issued under the fixed designation B743; 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 parenthese
2、s indicates the year of last reapproval. Asuperscript epsilon () indicates an editorial change since the last revision or reapproval.1. Scope*1.1 This specification establishes the requirements for seam-less copper tube in coils, suitable for use in refrigeration and airconditioning or other uses, s
3、uch as oil lines and gasoline lines.1.2 UnitsThe values stated in inch-pound units are to beregarded as standard. The values given in parentheses aremathematical conversions to SI units that are provided forinformation only and are not considered standard.1.3 The tube shall be produced of the follow
4、ing coppers.Unless otherwise specified, tubes made from any one of thesecoppers may be supplied:Copper AlloyUNS No.Previously UsedDesignation Type of CopperC10200 OF Oxygen-free without residual deoxidantsAC10300 . Oxygen-free, extra low phosphorusAC10800 . Oxygen-free, low phosphorusAC12000 DLP Pho
5、sphorized, low residual phosphorusC12200 DHP Phosphorized, high residual phosphorusASee Classification B224.1.4 The following safety hazards caveat pertains to the testmethod portion, Section 17, of this specification. This standarddoes not purport to address all of the safety concerns, if any,assoc
6、iated with its use. It is the responsibility of the user of thisstandard to establish appropriate safety and health practicesand determine the applicability of regulatory limitations priorto use.2. Referenced Documents2.1 ASTM Standards:2B153 Test Method for Expansion (Pin Test) of Copper andCopper-
7、Alloy Pipe and TubingB170 Specification for Oxygen-Free Electrolytic CopperRefinery ShapesB193 Test Method for Resistivity of Electrical ConductorMaterialsB224 Classification of CoppersB251 Specification for General Requirements for WroughtSeamless Copper and Copper-Alloy TubeB577 Test Methods for D
8、etection of Cuprous Oxide (Hy-drogen Embrittlement Susceptibility) in CopperB601 Classification for Temper Designations for Copperand Copper AlloysWrought and CastB846 Terminology for Copper and Copper AlloysE2 Methods of Preparation of Micrographs of Metals andAlloys (Including Recommended Practice
9、 for PhotographyAs Applied to Metallography); Replaced by E 8833E3 Guide for Preparation of Metallographic SpecimensE8/E8M Test Methods for Tension Testing of MetallicMaterialsE18 Test Methods for Rockwell Hardness of Metallic Ma-terialsE29 Practice for Using Significant Digits in Test Data toDeterm
10、ine Conformance with SpecificationsE53 Test Method for Determination of Copper in UnalloyedCopper by GravimetryE62 Test Methods for Chemical Analysis of Copper andCopper Alloys (Photometric Methods)3E112 Test Methods for Determining Average Grain SizeE243 Practice for Electromagnetic (Eddy-Current)
11、Exami-nation of Copper and Copper-Alloy TubesE255 Practice for Sampling Copper and Copper Alloys forthe Determination of Chemical CompositionE2575 Test Method for Determination of Oxygen in Copperand Copper Alloys3. General Requirements3.1 The following sections of Specification B251 constitutea par
12、t of this specification:3.1.1 Sampling,3.1.2 Number of tests and retests,3.1.3 Dimensions and permissible variations,3.1.4 Test specimens, and1This specification is under the jurisdiction ofASTM Committee B05 on Copperand Copper Alloys and is the direct responsibility of Subcommittee B05.04 on Pipea
13、nd Tube.Current edition approved April 1, 2012. Published May 2012. Originallyapproved in 1985. Last previous edition approved in 2006 as B743 06. DOI:10.1520/B0743-12.2For referenced ASTM standards, visit the ASTM website, www.astm.org, orcontact ASTM Customer Service at serviceastm.org. For Annual
14、 Book of ASTMStandards volume information, refer to the standards Document Summary page onthe ASTM website.3Withdrawn. The last approved version of this historical standard is referencedon www.astm.org.1*A Summary of Changes section appears at the end of this standard.Copyright ASTM International, 1
15、00 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.3.1.5 Significance of numerical limits.3.2 In addition, when a section with a title identical to thosereferenced in 3.1 appears in this specification, it containsadditional information which supplements those appearin
16、g inSpecification B251. In case of conflict, this specification shallprevail.4. Terminology4.1 DefinitionsFor the definitions of terms related tocopper and copper alloys, refer to Terminology B846.4.2 Definitions of Terms Specific to This Standard:4.2.1 level or traverse wound, adjcoil in which the
17、turnsare wound into layers parallel to the axis of the coil such thatsuccessive turns in a given layer are next to one another(sometimes called “helical coil”).4.2.2 single layer flat, adjcoil in which the product isspirally wound into a single disk-like layer (sometimes called“pan-cake coil” or “si
18、ngle layer spirally wound coil”).4.2.3 double layer flat, adjcoil in which the product isspirally wound into two connected disk-like layers such thatone layer is on top of the other (sometimes called “double layerpan-cake coil” or “double layer spirally wound coil”).5. Ordering Information5.1 Includ
19、e the following information when placing ordersfor product under this specification, as applicable:5.1.1 ASTM designation and year of issue,5.1.2 Copper UNS No. (for example, C12200), if required(see 1.3 and Table 1),5.1.3 Temper (see Section 8).5.1.4 Dimensions, diameter, and wall thickness. Dimen-
20、sional tolerances, if other than those included in this specifi-cation, are required,5.1.5 Length (see 14.1 and Table 2),5.1.6 Type of coil (see 4.2),5.1.7 Total quantity of each item,5.2 The following options are available and shall be speci-fied at the time of placing the order, when required:5.2.
21、1 Embrittlement test (see 13.3),5.2.2 Refrigeration or air-conditioning grade (see 13.4),5.2.3 If coil ends are to be sealed (see 13.4.1.1),5.2.4 Eddy-current test (see 13.1.1),5.2.5 Expansion test (see 12.1.1),5.2.6 Electrical resistivity requirement (see 10.1),5.2.7 Certification (see Section 21),
22、5.2.8 Mill test report (see Section 22).6. Materials and Manufacture6.1 Material:6.1.1 The material of manufacture shall be cast billet, bar,tube, and so forth of Copper Alloys Nos. C10200, C10300,C10800, C12000, or C12200 and of such purity and soundnessas to be suitable for processing in to the pr
23、oduct prescribedherein.6.1.2 In the event heat identification or traceability isrequired, the purchaser shall specify the details desired.NOTE 1Due to the discontinuous nature of the processing of castingsinto wrought products, it is not always practical to identify a specificcasting analysis with a
24、 specific quantity of finished material.6.2 Manufacture:6.2.1 The product shall be manufactured by such hot andcold working processes needed to produce a homogenous,uniform wrought structure in the finished product.6.2.1.1 The product shall be cold drawn to the finish sizeand wall thickness.6.2.1.2
25、When the cold-drawn temper is required, the finaldrawing operation shall be such as to meet the temperproperties specified.6.2.1.3 When the annealed temper is required, the tube shallbe annealed after the final cold draw to meet the temperproperties specified.7. Chemical Composition7.1 The material
26、shall conform to the compositional require-ments listed in Table 1 for the copper UNS No. designationspecified in the ordering information.7.1.1 Results of analysis on a product (check) sample shallconform to the composition requirements within the permittedanalytical variance specified in Table 1.7
27、.2 These compositional limits do not preclude the presenceof other elements. By agreement between the manufacturer andpurchaser, limits may be established and analysis required forunnamed elements.8. Temper8.1 The standard tempers for products described in thisspecification are given in Table 3.8.2
28、H (Drawn) TemperThe temper of drawn tube shall bedesignated as H58 (drawn, general purpose).8.3 O (Annealed) TemperThe temper of annealed tubeshall be designated as 050 (light anneal) and 060 (soft anneal).Tempers are defined in Classification B601.9. Grain Size for Annealed Tempers9.1 Grain size sh
29、all be the standard requirement for allproduct in the annealed tempers.9.2 Acceptance or rejection based upon grain size shalldepend only on the average grain size of a test specimen takenTABLE 1 Chemical RequirementsElementComposition, %Copper Alloy UNS No.C10200AC10300 C10800 C12000 C12200Copper,B
30、min 99.95 . . 99.90 99.9Copper + 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 counting as copper.B743 122from each of two sample portions, and each specimen shall bewithin the limits prescribed in Table 4 when
31、determined inaccordance with Test Methods E112.9.3 Upon agreement between the manufacturer and thepurchaser, special grain size ranges (other than standard O50and O60) may be designated to facilitate fabrication etc. If thedesired range spans both O50 and O60 designations, the O60yield strength and
32、the O50 hardness limits will apply.10. Physical Property Requirements10.1 Electrical Resistivity RequirementWhen specified inthe contract or purchase-order, the product ordered for electri-cal conductor application produced from Copper UNS No.C10200, C10300, or C12000 shall conform to the electrical
33、mass resistivity, V.g/m2prescribed in Table 5 for the specifiedcopper and temper when tested in accordance with TestMethod B193.11. Mechanical Property Requirements11.1 Tensile and Yield StrengthThe product shall conformto the requirements in Table 3 for the specified temper.11.2 Rockwell Hardness:1
34、1.2.1 For product of the H58 temper and Rockwell hard-ness values are given for reference purposes only.11.2.2 For product of the O (annealed) temper, the productshall conform to the Rockwell hardness values contained inTable 3.12. Performance Requirements12.1 Expansion Requirement:12.1.1 When speci
35、fied in the contract or purchase order,tube furnished in the annealed temper shall be capable of beingexpanded in accordance with Test Method B153 with anexpansion of the outside diameter in the following percentage:Outside Diameter,in. (mm)Expansion of OutsideDiameter, %0.750 (19.1) and under 40Ove
36、r 0.750 (19.1) 3012.1.2 The expanded tube shall show no cracking or rupturevisible to the unaided eye.13. Other Requirements13.1 Nondestructive Examination for Defects:13.1.1 Upon agreement between the manufacturer and thepurchaser, each tube shall be subjected to an eddy-current test.13.1.2 Tubes s
37、hall be tested normally in the drawn temper;however, they may be tested in the annealed temper at theoption of the manufacturer.13.1.3 Testing shall follow the procedures of Practice E243except for the determination of “end effect.”NOTE 2End effect is that length of the tube, which travels through t
38、hecoil until the testing unit, has stabilized and is able to detect flaws. TheTABLE 2 Coil Length Tolerances (Specific Lengths)Tube Outside Diameter, in.(mm)Nominal Length, ft (m)Shortest PermissibleLength, % of NominalLengthMaximum Permissible Weight ofEnds, % of Lot WeightTolerance All Plus ft (m)
39、All sizes Up to 100 (30.5), incl 100 0 1(0.3)All sizes Over 100 (30.5) 40 20 .TABLE 3 Mechanical Property Requirements of Drawn-Temper and Annealed-Temper TubeRockwell HardnessTemper DesignationWall Thickness,in. (mm)Scale ValueTensile Strength Min,ksiA(MPa)Yield StrengthBMin,ksiA(MPa)Elongation in
40、2 in.,min %H58 Less than 0.020 N/A N/A 36 (250) 30 (205) N/A0.020 and over 30TC30 min 36 (250) 30 (205) N/AO50 Less than 0.015 N/A N/A 30 (205) 9 (62) 400.015 to 0.035 15TC65 max 30 (205) 9 (62) 40(0.381 to 0.889)Over .035 FC55 max 30 (205) 9 (62) 40(0.889)O60 Less than 0.015 N/A N/A 30 (205) 6 (40)
41、 400.015 to 0.035 15TC60 max 30 (205) 6 (40) 40(0.381 to 0.889)Over 0.35 FC50 max 30 (205) 6 (40) 40(0.889)Aksi = 1000 psi.BYield strength to be determined at 0.5 % extension under load.CRockwell hardness values apply to tubes having an inside diameter of516 in. (7.92 mm) or over, and Rockwell hardn
42、ess test shall be made on the inside surface ofthe tube. When suitable equipment is not available for determining the specific Rockwell hardness, other Rockwell scales and values may be specified subject to agreementbetween the purchaser and supplier.TABLE 4 Grain Size of Annealed TempersTemper Aver
43、age Grain Size, mmO60 0.040 minO50 0.040 maxTABLE 5 Resistivity (Vg/m2) of Copper UNS No.NOTE 1Refer to Appendix X1 for the International Annealed CopperStandard (IACS) electrical conductivity equivalents.Temper C10200 C10300 C12000O50, O60 0.153 28 0.156 14 0.170 31H58 0.15737 0.159 40 0.174 18B743
44、 123magnitude of the spike, generated when an end passes through the testcoils is such that it disrupts testing momentarily.13.1.4 Unless otherwise agreed upon between the manufac-turer, or supplier, and the purchaser, the manufacturer shallhave the option of calibrating the test equipment using eit
45、hernotches or drilled holes. If agreement cannot be reached,drilled holes shall be used.13.1.4.1 Notch-depth standards rounded to the nearest 0.001in. (0.025 mm) shall be 22 % (max) of the nominal bottom-wall thickness.13.1.4.2 Drilled-hole standards shall be 0.025 in. (0.635mm) diameter (max.) for
46、tubes up to and including34 in. (19.05mm) specified diameter and 0.031 in. (0.785 mm) max.diameter for tubes over34 in. (19.05 mm) specified diameter.Hole diameter tolerance is + 0.001 in.13.1.5 Tubes that do not actuate the signaling device on theeddy-current tester shall be considered in conforman
47、ce with therequirements of this test.13.1.6 Tubes, rejected for irrelevant signals because ofmoisture, soil, and like effects, may be reconditioned andretested.13.1.7 Tubes that are reconditioned and retested (see 13.1.6)shall be considered in conformance with the requirements ofthis specification,
48、if they do not cause output signals beyondthe acceptable limits.13.1.8 Eddy-current discontinuities will be identified oncoils in excess of 200 ft (61 m) in length for subsequentremoval by the purchaser.13.1.9 At the customers discretion, the permissible numberof identified eddy current discontinuit
49、ies may be specified.13.2 Cuprous Oxide RequirementSamples of CopperUNS No. C10200, C10300, and C12000 shall be significantlyfree of cuprous oxide as determined by Procedure A of TestMethods B577. In case of dispute, a referee method inaccordance with Procedure C shall be used.13.3 EmbrittlementSamples of Copper UNS Nos.C10200, C10300, C10800, C12000, and C12200 shall becapable of passing the embrittlement test of Procedure B ofTest Methods B577. The actual performance of this test is notmandatory under the terms of this specification unless specifiedin th
