ASTMB2-00中等硬度冷拉铜丝

1、TABLE 1 Tensile RequirementsDiameterArea at 20 CTen sile Stren gthElon gati on, min.in.mmcmilin.22 mmpsiMPa%in 10-in.(250 mm)MinMaxMinMax0.460011.684211 6000.1662107.042 00049 0002903403.80.409610.404167 8000.131885.043 00050 0002953453.60.36489.266133 1000.104567.444 00051 0003053503.20.32498.25210

2、5 6000.0829153.545 00052 0003103603.00.28937.34883 6900.0657342.446 00053 0003153652.80.25766.54366 3600.0521233.647 00054 0003253702.50.22945.82752 6200.0413326.748 00055 0003303802.20.20435.18941 7400.0327821.248 33055 3303353801.90.18194.62033 0900.0259916.848 66055 6603353851.70.16204.11526 2400

3、.0206113.349 00056 0003403851.50.14433.66520 8200.0163510.549 33056 3303403901.40.12853.26416 5100.012978.3749 66056 6603403901.30.11442.90613 0900.010286.6350 00057 0003453951.30.10192.58810 3800.0081555.2650 33057 3303453951.20.09072.3048 2300.006464.1750 66057 6003504001.20.08082.0526 5300.005133

4、.3151 00058 0003504001.10.07201.8295 1800.004072.6351 33058 3303554001.10.06411.6284 1100.003232.0851 66058 6603554051.00.05711.4503 2600.002561.6552 00059 0003604051.00.05081.2902 5800.002031.3152 33059 3303604101.00.04531.1512 0500.001611.0452 66059 6603654101.00.04031.0241 6200.001280.82353 00060

5、 0003654151.0TABLE 1 Tensile RequirementsTABLE 1 Tensile Requirements1, but which is less than that of the next larger size, the requirements of the next larger size shall apply.7.4 Determine the elongation of the wire as the permanent in crease in len gth due to the break ing of the wire in tension

6、, measured betwee n gage marks placed orig in ally 10 in. (254 mm) apart upon the test specimen (Explanatory Note 4).7.5 If any part of the fracture takes place outside the gage marks or in the jaws of the testing machine, or if an examination of the specimen indicates a ?aw, the value obtained may

7、not be representative of the material. In such casesthe test may be discarded and a new test made.7.6 Retests If, upon testing a sample from any coil or spool of wire, the results do not con form to the requireme nts prescribed in Table 1, two additional samples shall be tested and the average of th

8、e three tests shall determine the acceptance or rejection of the coil or spool.8. Resistivity8.1 Electrical resistivity shall be determined on representative samples by resista nee measureme nts (Expla natory Note 5 and Note 6). At a temperature of 20 Cthe resistivity shall not exceed the following

9、values:Nominal Diameter, in.Resistivity at 20 C,V lb/mileV g/iri0.460 to 0.325 (11.684 to 8.255 mm), incl896.150.15695Under 0.325 to 0.0403 (8.255 to 1.024 mm), incl 905.440.158588.2 Tests to determ ine con forma nce to the electrical resistance requirements shall be made in accordance with Test Met

10、hod B 193.9. Joints9.1 No joints shall be made in the completed wire (Explanatory Note 7). Joints in wire and rods, prior to ?nal drawing, shall be made in accordance with the best commercial practice and shall conform to the requirements prescribed in 7.2.10. Inspection10.1 Unl ess otherwise speci?

11、ed in the c on tract or purchase order, the manufacturer shall be responsible for the performance of all inspection and test requirements speci?ed (Expla natory Note 8).10.2 All inspections and tests shall be made at the place of manufacture unless otherwise especially agreed to between the manufact

12、urer and the purchaser at the time of the purchase.10.3 The manufacturer shall afford the inspector representing the purchaser all reas on able man ufacturer facilities to satisfy that the material is being furnished in accordance with this speci?cation.10.4 Unless otherwise agreed upon between the

13、purchaser and the man ufacturer, con forma nce of the wire to the various requirements listed in this speci?cation shall be determined on samples taken from each lot of wire presented for acceptance.10.5 The manufacturer shall, if requested prior to inspection, certify that all wire in the lot was m

14、ade under such con diti ons that the product as a whole con forms to the requirements of this speci?cation as determined by regularly made and recorded tests.10.6 In specti on and Testi ng Terms:10.6.1 LotA lot is a nyamou nt of wire o f on e type a nd size presented for acceptance at one time; such

15、 amount, however, not to exceed 100 000 lb or 45 000 kg (Explanatory Note 9).10.6.2 SampleA sample is a quantity of production units (coils, reels, etc.) selected at random from the lot for the purpose of determ ining con forma nce of the lot to the requirements of this speci?cation.10.6.3 SpecimenA

16、 specimen is a length of wire removed for test purposes from any in dividual producti on un it of the sample.10.7 Sample Size The number of production units in a sample (Explanatory Note 8) shall be as follows:For tension, elongation, and resistivity determinations, the sample shall consist of four

17、production units. From each unit, one test specimen of sufficient length shall be removed for the performance of the required tests.TABLE 1 Tensile RequirementsTABLE 2 Sampling for Dimensional MeasurementsNumber of Un itsin LotFirst SampleSecond SampleTABLE 2 Sampling for Dimensional MeasurementsNum

18、ber of Un itsin LotTABLE 2 Sampling for Dimensional MeasurementsNumber of Un itsin LotNumber of Units inSample,Allowable Number ofDefects in First Sample, cNumber of Un its inSample, n?Allowable Number of Defects in Both Samples, c?TABLE 2 Sampling for Dimensional MeasurementsNumber of Un itsin Lot1

19、 to 14, inclall015 to 50, incl14051 to 100, incl19023421101 to 200, incl24046702201 to 400, incl290761053401 to 800, incl3301121454Over 8003401161504TABLE 2 Sampling for Dimensional MeasurementsNumber of Un itsin LotTABLE 2 Sampling for Dimensional MeasurementsNumber of Un itsin Lot10.7.1 For dimens

20、ional measurements, the sample shall consist of a quantity of production units shown in Table 2 under the heading “ FirstSample. ”10.7.2 For surface-?nish inspection and for packaging in- specti on (whe n speci?ed by the purchaserat the time of plac ing the order) the sample shall consist of a quant

21、ity of production units shown in Table 3.11. Packaging and Shipping11.1 Package sizes shall be agreed upon between the manufacturer and the purchaser in the plac ing of in dividual orders.11.2 The wire shall be protected against damage in ordinary handling and shipping.TABLE 3 Sampling for Surface F

22、inish and Packaging InspectionNumber of Un its in LotNumber of Units inSample, nAllowable Number ofDefective Units, c1 to 30, inclall031 to 50, incl30051 to 100, incl370101 to 200, incl400201 to 300, incl701301 to 500, incl1002501 to 800, incl1303Over 800155412. Keywords12.1 copper wire; medium-hard

23、 copper wire; round copper electrical wire; round copper wireTABLE 2 Sampling for Dimensional MeasurementsNumber of Un itsin LotTABLE 2 Sampling for Dimensional MeasurementsNumber of Un itsin LotEXPLANATORY NOTESTABLE 2 Sampling for Dimensional MeasurementsNumber of Un itsin LotTABLE 2 Sampling for

24、Dimensional MeasurementsNumber of Un itsin LotNote 1Medium-hard drawn wire approaches hard-drawn wire in its characteristics, but from the very nature of the product, exact uniformity in tensile strength cannot be obtained. Hence it has been necessary to establish a range of tensile strengths within

25、 which standard medium-hard- drawn wire may be expected to be found.Note 2The values of the wire diameters in Table 1 are given to the nearest 0.0001 in. (0.001 mm) and correspond to the standard sizes given in Speci?cation B 258. The use of gage numbers to specify wire sizes is not recognized in th

26、is speci?cation becauseof the possibility of confusion. An excellent discussion of wire gagesand related subjects is contained in NBS Handbook 100.Note 3 Other tests than those provided in this speci?cation have been considered at various times, such as twist tests, wrap tests, tests for elastic lim

27、it, etc. It is the opinion of the committee that twist and wrap tests on medium-hard-drawn wire do not serve a useful purpose and should be regarded as undesirable, as well as inconclusive as to results and signi?cance. Tests for values of elastic limit are likewise inde?nite as to results. Tests to

28、 determine elastic properties of medium-hard-drawn wire from which wire stringing and sagging data may be compiled are considered to be outside the scope of the acceptance tests contemplated in this speci?cation.Note 4 It is known that the rate of loading during tension testing of copper affects the

29、 performance of the sample to a greater or lesser extent, depending upon many factors. In general, tested values of tensile strength are increased and tested values of elongation are reduced with increase of speed of the moving head of the testing machine. These effects are pronounced when the speed

30、 of the moving head is excessive in the testing of medium-hard-drawn wires. It is suggested that tests be made at speeds of moving head that, under no-load conditions, are not greater than 3 in. (75 mm)/min, but in no case at a speed greater than that at which correct readings can be made.Note 5“ Re

31、sistivity is ”sed in place of apercentageconductivity. The value of 0.15328V g/m2 at 20Cis the international standard for the resistivity of annealed copper equal to 100 % conductivity. This term means that a wire 1 m in length and weighing 1 g would have a resistance of 0.15328 V. This is equivalen

32、t to a resistivity value of 875.20 V - lb/mile which signi?es the resistance of a wire 1 mile in length weighing 1 lb. It is also equivalent, for example, to 1.7241 |A/cm of2length of a bar 1 cm in cross section. A complete discussion of this subject is contained in NBS Handbook 100. Relationships t

33、hat may be useful in connection with the values of resistivity prescribed in this speci?cation are as in Table 4, each column containing equivalent expressions, at 20 C.Note 6 The value of density of copper is in accordance with the International Annealed Copper Standard. The corresponding value at

34、0C33is 8.90 g/cm (0.32150 lb/in. ). As pointed out in the discussion of this subject in NBS Handbook 100, there is no appreciable difference in values of density of medium-hard-drawn and annealed copper wire.Note 7 Mechanical joints made during inspection at the request of the purchaser are permissi

35、ble if agreed upon at the time of placing the order.Note 8 Cumulative results secured on the product of a single manufacturer, indicating continued conformance to the criteria, are necessary to ensure an over-all product meeting the requirements of this speci?cation. The sample sizes and conformance

36、 criteria given for the various characteristics are applicable only to lots produced under these conditions.TABLE 4 Resistivity RelationshipsCon ductivity at20 C,%100.0097.6696.66V - lb/mile875.20896.15905.44V - g/rfi0.153280.156940.15857V - cmil/ft10.37110.61910.729V - mrr/m0.0172410.0176540.017837

37、凶-in.0.678790.695040.70224凶-cm1.72411.76541.7837TABLE 2 Sampling for Dimensional MeasurementsNumber of Un itsin Lotkg of wire cannot be justi?edas a whole as evidence of acceptability of such small lots.Note 9A lot should comprise material taken from a product regularly meeting the requirements of t

38、his speci?cation. Inspection of individual lots of less than 5000 lb or 2270economically. For small lots of 5000 lb or less, or 2270 kg or less, the purchaser may agree to the manufacturer regular inspection of the productrespect ingfor Testi ng and Materials takes no positionin this standard. Users