1、Designation: B 944 06Standard Specification forCopper-Beryllium Welded Heat Exchanger and CondenserTube (UNS No. C17510)1This standard is issued under the fixed designation B 944; the number immediately following the designation indicates the year oforiginal adoption or, in the case of revision, the
2、 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.1. Scope1.1 This specification establishes the requirements forcopper-beryllium alloy UNS No. C17510 welded tube instrai
3、ght lengths.1.2 UnitsThe values stated in inch-pound units are to beregarded as standard. The values given in parentheses aremathematical conversions to SI units, which are provided forinformation only and are not considered standard.1.3 This standard does not purport to address all of thesafety con
4、cerns, 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 limitations prior to use.2. Referenced Documents2.1 ASTM Standards:2B 153 Test Method for Expansion (Pin T
5、est) of Copper andCopper-Alloy Pipe and TubingB 194 Specification for Copper-Beryllium Alloy Plate,Sheet, Strip, and Rolled BarB 601 Classification for Temper Designations for Copperand Copper AlloysWrought and CastB 846 Terminology for Copper and Copper AlloysE8 Test Methods for Tension Testing of
6、Metallic MaterialsE18 Test Methods for Rockwell Hardness and RockwellSuperficial Hardness of Metallic MaterialsE29 Practice for Using Significant Digits in Test Data toDetermine Conformance with SpecificationsE 243 Practice for Electromagnetic (Eddy-Current) Exami-nation of Copper and Copper-Alloy T
7、ubesE 255 Practice for Sampling Copper and Copper Alloys forthe Determination of Chemical CompositionE 1004 Practice for Determining Electrical ConductivityUsing the Electromagnetic (Eddy-Current) Method3. Terminology3.1 For definitions of terms related to copper and copperalloys, refer to Terminolo
8、gy B 846.4. Ordering Information4.1 Include the following information when placing ordersfor product under this specification, as applicable:4.1.1 ASTM designation and year of issue,4.1.2 Copper Alloy UNS No. designation,4.1.3 Temper (Section 7),4.1.4 Dimensions, diameter, and wall thickness (Sectio
9、n12). For tube or pipe, specify either OD/wall, ID/wall, orOD/ID,4.1.5 Minimum wall thickness or average (nominal) wallthickness,4.1.6 Tube length, specific or random, and4.1.7 QuantityTotal weight or total length or number ofpieces of each size.4.2 The following options are available and should bes
10、pecified at the time of placing of the order when required:4.2.1 Hydrostatic test,4.2.2 Pneumatic test,4.2.3 Weld bead conditioning, and4.2.4 Certification.5. Materials and Manufacture5.1 MaterialsThe material of manufacture shall be sheetor strip of UNS Alloy No. C17510 of such purity andsoundness
11、to be suitable for processing into the productsprescribed herein.5.2 ManufactureThe product shall be manufactured fromcold rolled strip which is subsequently formed and welded byan automatic welding process without the addition of fillermetal.6. Chemical Composition6.1 Material shall conform to the
12、chemical compositionrequirements in Table 1 for Copper Alloy UNS No. C17510.1This specification is under the jurisdiction ofASTM Committee B05 on Copperand Copper Alloys and is the direct responsibility of Subcommittee B05.04 on Pipeand Tube.Current edition approved Feb. 1, 2006. Published February
13、2006.2For 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 standards Document Summary page onthe ASTM website.1Copyright ASTM International, 100 Barr Harbor Drive, PO
14、 Box C700, West Conshohocken, PA 19428-2959, United States.6.2 These composition limits do not preclude the presenceof other elements. By agreement between the manufacturer andpurchaser, limits may be established and analysis required forunnamed elements.6.3 For alloys in which copper is listed as “
15、Remainder,”copper is the difference between the sum of results of allelements determined and 100 %. When all elements in Table 1are determined, the sum of results shall be 99.5 % min.7. Temper7.1 The standard temper for products described in thisspecification is TF00 (precipitation hardened) as defi
16、ned inClassification B 601.8. Physical Property Requirements8.1 Electrical ConductivityProduct furnished to thisspecification shall conform to the electrical conductivity re-quirement given in Table 2, when tested in accordance withPractice E 1004.9. Mechanical Property Requirements9.1 Tensile Stren
17、gth Requirements:9.1.1 Product furnished under this specification shall con-form to the tensile requirements prescribed in Table 2, whentested in accordance with Test Methods E8.9.2 When specified in the contract or purchase order, theproduct shall conform to the Rockwell hardness requirementprescri
18、bed in Table 2 when tested in accordance with TestMethod E18.9.2.1 The approximate Rockwell hardness values given inTable 2 are for general information and assistance in testing,and shall not be used as a basis for product rejection.10. Performance Requirements10.1 Expansion Test RequirementsTube sp
19、ecimens se-lected for test shall withstand an expansion of 15 % whenexpanded in accordance with Test Method B 153. This isdefined as expansion of tube outside diameter in percent oforiginal outside diameter. The expanded tube shall show nocracking or rupture visible to the unaided eye.10.2 Flattenin
20、g Test RequirementsTest specimens at least4 ft in length shall be flattened on different elements throughoutthe length remaining after specimens for the expansion andmetallographic tests have been taken. Each element shall beslowly flattened by one stroke of a press. The term “flattened”shall be int
21、erpreted as follows: A micrometer caliper set atthree times the wall thickness shall pass over the tube freelythroughout the flattened part except at the points where thechange in element of flattening takes place. The flattenedelements shall not show cracking or rupture visible to theunaided eye. T
22、he weld when visible or identifiable shall beplaced in the position of maximum bend on one half of theflattened elements.10.3 Reverse Bend Test RequirementsA section 4 in. inlength shall be split longitudinally 90 on each side of the weld.The sample shall then be opened and bent around a mandrelwith
23、 a diameter four times the wall thickness, with the mandrelparallel to the weld and on the outside of the tube. The weldwhen visible or identifiable shall be at the point of maximumbend. There shall be no evidence of cracks, or lack ofpenetration in the weld.11. Other Requirements11.1 Each tube shal
24、l be subjected to an eddy-current test.The purchaser may specify either of the tests in 11.2 or 11.3 asan alternative to the eddy-current test.11.1.1 Eddy Current TestEach tube shall be passedthrough an eddy-current testing unit adjusted to provideinformation on the suitability of the tube for the i
25、ntendedapplication. Testing shall follow the procedures of PracticeE 243, except as modified in 11.1.1.2.11.1.1.1 The depth of the round-bottom transverse notchesand the diameters of the drilled holes in the calibrating tubeused to adjust the sensitivity of the test unit are shown in Table3 and Tabl
26、e 4 respectively.11.1.1.2 The discontinuities used to calibrate the test systemmay be placed in the strip from which the tube will bemanufactured. These calibration discontinuities will passthrough the continuous operations of forming, welding, andeddy-current testing. The test unit sensitivity requ
27、ired to detectthe resultant discontinuities shall be equivalent to or greaterthan that required to detect the notches or drilled holes of Table3 and Table 4 respectively, or other calibration discontinuitiesthat may be used by mutual agreement between the manufac-turer or supplier and the purchaser.
28、 Calibration discontinuitiesmay be on the outside tube surface, the internal tube surface, orthrough the tube wall and shall be spaced to provide signalresolution adequate for interpretation. Each calibration discon-tinuity shall be detected by the eddy-current tester.11.1.1.3 Tubes that do not actu
29、ate the signaling device ofthe eddy-current tester shall be considered as conforming to theTABLE 1 Chemical RequirementsComposition, %Element UNS No. C17510Beryllium 0.20.6Cobalt, max 0.3Nickel 1.42.2Iron, max 0.10Aluminum, max 0.20Silicon, max 0.20Copper RemainderTABLE 2 Mechanical Property and Ele
30、ctrical Conductivity Requirements After Precipitation Heat TreatmentTemper Designation Tensile StrengthElongation in2 in. (50 mm),%minYield Strength, ksimin, 0.2 % OffsetRockwellHardnessBElectricalConductivityIACS min, %Standard Former ksi MPa ksi MPaTF00 AT 100130 (690895) 10 80 (550) 92100 45B9440
31、62requirements of this test. Tubes causing irrelevant signalsbecause of moisture, soil, and like effects may be reconditionedand retested. Such tubes, when retested to the original testparameters, shall be considered to conform if they do not causeoutput signals beyond the acceptable limits. Tubes c
32、ausingirrelevant signals because of visible and identifiable handlingmarks may be retested by the hydrostatic test prescribed in11.2, or the pneumatic test prescribed in 11.3. Tubes meetingrequirements of either test shall be considered to conform if thetube dimensions are within the prescribed limi
33、ts, unless other-wise agreed to by the manufacturer or supplier and thepurchaser.11.2 Hydrostatic TestWhen specified, each tube shallwithstand, without showing evidence of leakage, an internalhydrostatic pressure sufficient to subject the material to a fiberstress of 7000 psi, determined by the foll
34、owing equation forthin hollow cylinders under tension. The tube need not betested at a hydrostatic pressure of over 1000 psig unless sospecified.P 5 2St/D 0.8t! (1)where:P = hydrostatic pressure, psig,t = thickness of tube wall, in.,D = outside diameter of the tube, in., andS = allowable stress of t
35、he material, psi.11.3 Pneumatic TestWhen specified, each tube shall besubjected to an internal air pressure of 100 psig minimumwithout showing evidence of leakage. The test method usedshall permit easy visual detection of any leakage, such as byhaving the tube under water or by the pressure-differen
36、tialmethod. Any evidence of leakage shall be cause for rejection.12. Dimensions, Mass, and Permissible Variations12.1 Dimensions and tolerances for product described bythis specification shall be as specified: Wall Thickness, Table 3;Diameter, Table 4; Length, Table 5; and Straightness, Table 6.12.1
37、.1 Tolerances on a given tube may be specified withrespect to any two, but not all three, of the following: outsidediameter, inside diameter, wall thickness.12.2 Wall-thickness tolerances shall be in accordance withTable 5.12.2.1 Tubes Ordered to Minimum WallNo tube at itsthinnest point shall be les
38、s than the specified wall thickness orgreater than the specified wall thickness plus twice the toler-ance values shown in Table 5.12.2.2 Tubes Ordered to Nominal WallThe maximumplus and minus deviation from the nominal wall at any pointshall not exceed the values shown in Table 5.12.3 Diameter Toler
39、ances shall be in accordance with Table6.12.3.1 DiameterThe outside diameter of the tubes shallnot vary from that specified by more than the amounts shownin Table 6 as measured by “go” and “no-go” ring gauges. If novalues are shown in the table, dimensions shall be as agreedbetween the Purchaser and
40、 the manufacturer or supplier.12.4 Length Tolerances shall be in accordance with Table 7.12.4.1 LengthThe length of the tubes shall not be lessthan that specified but may exceed the specified value by theamounts given in Table 712.5 SquarenessThe departure from squareness of the endshall not exceed
41、0.016 in./in. of diameter.12.6 Straightness Tolerances shall be in accordance withTable 8.12.6.1 For lengths greater than 10 ft the maximum curvatureshall not exceed12 in. in any 10-ft portion of the total length.13. Workmanship, Finish and Appearance13.1 The product shall be free of defects, but bl
42、emishes ofa nature that do not interfere with the intended application areacceptable.TABLE 3 Notch DepthSpecified WallThickness, in.Outside Diameter, in.0.625 to0.750, incl.Over 0.750 to1.250, incl.Over 1.250 to2.000, incl.Over 0.0170.032 0.005 0.006 0.007Incl. 0.0320.049 0.006 0.006 0.008Incl. 0.04
43、90.083 0.007 0.008 0.008TABLE 4 Diameter of Drilled HolesOutside Diameter,in.Diameter ofDrilled Holes, in.DrillNo.0.2501.000, incl. 0.031 68Over 1.0001.025, incl. 0.036 64Over 1.2501.500, incl. 0.042 58Over 1.5001.750, incl. 0.046 56Over 1.7502.000, incl. 0.052 55TABLE 5 Wall Thickness TolerancesSpe
44、cified WallThickness,in.Outside Diameter, in.0.625 to1.00, incl.Over 1.00 to2.00, incl.Over 2.00 to3.00, incl.Wall Thickness Tolerances, Plus and Minus, in.0.020 incl. to 0.032 0.004 0.004 0.0040.032 incl. to 0.035 0.004 0.004 0.0050.035 incl. to 0.058 0.006 0.006 0.0060.058 incl. to 0.083 0.008 0.0
45、08 0.008TABLE 6 Diameter TolerancesOutsideDiameter,in.Wall Thickness, in.0.020 incl.to 0.0320.032 incl.to 0.0350.035 incl.to 0.0580.058 incl.to 0.083Diameter Tolerance, Plus and Minus, in.0.625 incl. to 0.740 0.006 0.006 0.005 0.0050.740 incl. to 1.000 0.006 0.006 0.005 0.0041.000 incl. to 1.250 0.0
46、08 0.008 0.007 0.0061.250 incl. to 1.500 0.008 0.008 0.008 0.0071.500 incl. to 3.000 0.008 0.008 0.008 0.008TABLE 7 Length TolerancesSpecified Length, ft Tolerance, all plus, in.Up to 30, incl. 0.125Over 3060, incl. 0.250Over 60100, incl. 0.375B94406314. Sampling14.1 The lot size, portion size, and
47、selection of samplepieces shall be as follows.14.1.1 Lot Size300 tubes or 15 000 ft or a fraction ofeither, whichever is less.14.1.2 Portion SizeSample pieces from two individuallengths of finished product.14.2 Samples taken for the purpose of tests prescribed in thespecification shall be selected i
48、n a manner that will representcorrectly the material furnished and avoid needless destructionof finished material when samples representative of the mate-rial are available from other sources.15. Number of Tests and Retests15.1 Tests:15.1.1 Chemical AnalysisThe manufacturer shall have theoption of d
49、etermining conformance to chemical composition asfollows: Conformance shall be determined by analyzingsamples taken at the time the castings are poured or samplestaken from the semi-finished product. If the manufacturerdetermines the chemical composition of the material during thecourse of manufacture, he shall not be required to sample andanalyze the finished product. The number of samples taken fordetermination of chemical composition shall be as follows:15.1.1.1 When samples are taken at the time the castings arepoured, at least one sample sha
