1、Designation: B754 10 (Reapproved 2015)1B754 17Standard Test Method forMeasuring and Recording the Deviations from Flatness inCopper and Copper Alloy Strip1This standard is issued under the fixed designation B754; the number immediately following the designation indicates the year oforiginal adoption
2、 or, in the case of revision, the year of last revision. A number in parentheses indicates the year of last reapproval. Asuperscript epsilon () indicates an editorial change since the last revision or reapproval.1 NOTEEditorial changes were made in 1.1, 1.5 and 2.1 in May 2015.1. Scope*1.1 This test
3、 method establishes a procedure for the measurement of distortions in thin metal strip and the application of thesemeasurements to an equation that will indicate the deviation from flatness.1.2 The distortions to be measured in this test method are dish, wavy edges, buckle, longitudinal corrugation,
4、 coil set, andherringbone.1.3 This test method is not intended to include the measurement of coil set or longitudinal curl, camber, or edgewise curvature,or twist.1.4 This test method is limited to metal strip 0.003 to 0.020 in. 0.020 in. (0.08 to 0.50 mm) thick and not more than 6.0 in. (150.0mm) (
5、150.0 mm) wide.1.5 UnitsThe values stated in inch-pound units are to be regarded as standard. The values given in parentheses aremathematical conversions to SI units which are provided for information only and are not considered standard.1.6 The following safety hazard caveat pertains only to the te
6、st method(s) described in this test method. This standard does notpurport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard toestablish appropriate safety safety, health, and healthenvironmental practices and determine the a
7、pplicability of regulatorylimitations prior to use.1.7 This international standard was developed in accordance with internationally recognized principles on standardizationestablished in the Decision on Principles for the Development of International Standards, Guides and Recommendations issuedby th
8、e World Trade Organization Technical Barriers to Trade (TBT) Committee.2. Referenced Documents2.1 ASTM Standards:Standard:2B846 Terminology for Copper and Copper AlloysB950 Guide for Editorial Procedures and Form of Product Specifications for Copper and Copper Alloys3. Terminology3.1 For determinati
9、on of terms relating to copper and copper alloys, refer to Terminology B846.3.2 Definitions of Terms Specific to This Standard:3.2.1 edge wave (see wavy edge), coil setna continuous pattern of waves or wrinkles along the edges of the strip, with arelatively flat center portion.as applied to strip, t
10、he natural curvature remaining in a strip after it has been unwound from a coil.4. Summary of Test Method4.1 A prepared test specimen of a specific wrought copper or copper alloy sheet or strip of a predetermined thickness is placedon a surface plate. The relative flatness of the sample is determine
11、d by measuring the length and height of the irregularity andcalculating the percent of deviation.1 This test method is under the jurisdiction of ASTM Committee B05 on Copper and Copper Alloys and is the direct responsibility of Subcommittee B05.06 on Methodsof Test.Current edition approved May 1, 20
12、15Oct. 1, 2017. Published May 2015November 2017. Originally approved in 1986. Last previous edition approved 20102015 asB754 10.B754 10(2015)1. DOI: 10.1520/B0754-10R15E01.10.1520/B0754-17.2 For referencedASTM standards, visit theASTM website, www.astm.org, or contactASTM Customer Service at service
13、astm.org. For Annual Book of ASTM Standardsvolume information, refer to the standardsstandards Document Summary page on the ASTM website.This 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 ver
14、sion. Becauseit may not be technically possible to adequately depict all changes accurately, 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 sec
15、tion appears at the end of this standardCopyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States14.2 In the case of coil set, it is measured by hanging the strip against a vertical wall or post and measuring the distance of theunrestrained han
16、ging strip end from the wall or post. That measured distance is an indication of the amount of coil set that existsin the strip as a result of processing.5. Significance and Use5.1 This test method is intended for measuring distortion in strip used for making close tolerance parts. Since distortion
17、in thisstrip would influence the shape of the part being produced and cause difficulties in feeding through close-fitting dies and othermanufacturing equipment, it is important that this material be flat.5.2 This test method provides a universal procedure for measuring the irregularities that cause
18、the deviation from flatness.5.3 This test method allows the purchaser and manufacturer to inspect strip with a standard technique to a mutually agreed uponand acceptable percentage deviation from flatness, and in the case of coil set, acceptable distance deviation from flatness.6. Apparatus6.1 Surfa
19、ce Plate, to be used as a reference flat. It must have a large enough surface area to accommodate the maximum sizetest specimen. It shall be flat within 0.0002 in. (0.005 mm) per 1 in. (25 mm).6.2 Micrometer, for measuring metal thickness. It shall be graduated in 0.0001-in. (0.0025-mm) increments.6
20、.3 Height Gage, for measuring the height of irregularities. The arm of this gage must be long enough to extend beyond thecenter of the widest strip to be measured. It shall be graduated in 0.001-in. (0.025-mm) increments.36.4 Steel Rule, for measuring the lengths of the irregularities. irregularitie
21、s, and length of distance from a straight verticalsurface for coil set measurement. It shall be graduated in 0.02-in. (0.50-mm) increments.6.5 Vertical Surface, for measuring coil set of hanging strip. Vertical, perpendicular to a flat surface; measured 90 6 2.5 fromflat.7. Test Specimens7.1 The tes
22、t specimen shall be the full-finished slit width of the strip and cut long enough so that measurement will not beinfluenced by the distortions referred to in 1.3. It also must be long enough to measure coil set as defined in the procedure included.In any case, a minimum length of 12 in. (300 mm) is
23、required.7.2 When cutting specimens, caution must be taken to prevent additional distortion.8. Procedure8.1 Measure the thickness of the specimen at six locations, near each corner and at midwidth at each end, to the nearest 0.001in. (0.03 mm) using the micrometer. The average of these six readings
24、will be used as T.T (see Fig. 1).8.2 Place the test strip unrestrained on the surface plate. If the specimen is not flat, compare the irregularities observed with theillustrations shown in Figs. 1-5 to determine the type of distortion and how it should be measured.8.3 Using the height gage, measure
25、the highest point, H, of each of the irregularities to the nearest 0.001 in. (0.03 mm). SeeFigs. 1-6.8.4 Using the steel rule, measure the length, L, between the points where the outer radii of the most significant irregularitytouches the surface plate, to the nearest 0.02 in. (0.50 mm). See Figs. 1
26、-7.8.5 Repeat this procedure as often as necessary to satisfy quality level requirements, recording each measurement.8.6 In the case of coil set, hang the strip of the prescribed length against a vertical wall as shown in Fig. 8. Measure the distancefrom the vertical wall to the strip end at the bot
27、tom (refer to Fig. 8). The material is considered acceptable if it falls within themaximum prescribed deviation distance (D) from the wall.9. Calculation or Interpretation of Results9.1 Apply the values for T,H, and L obtained for each irregularity to the following equation to determine the percenta
28、ge ofdeviation from flat.Deviation from flat,%5H2TL 3100 (1)Compare the results to the agreed upon agreed-upon limits. The larger the percentage, the greater the deviation from flat.9.2 Coil Set - Deviation from VerticalMeasure Distance D as depicted in Fig. 8. Compare results against agreed-upon li
29、mits.3 An electronic touch sensitive system, which will not distort the sample, has been found to be acceptable.B754 17210. Report10.1 The nominal thickness, width, temper, alloy number, and form of product should be reported.10.2 The number and type of distortions measured and the thickness, height
30、, length, and percent deviation from flatness for eachshould be reported.11. Precision and Bias11.1 The precision of this test method is dependent upon the sensitivity of the measuring apparatus.11.2 This test method has no bias because the values of deviation from flatness are direct measurements b
31、ased on the accuracyof the test apparatus and the observations of the inspector.12. Keywords12.1 coil set; edge wave; flatness measurement; strip distortion; strip flatness; wavy edgeB754 173B754 174T = Thickness of MaterialH = Highest Point of IrregularitiesL = Measurement LengthB754 175FIG. 1 Dish
32、B754 176T = Thickness of MaterialH = Highest Point of IrregularitiesL = Measurement LengthB754 177FIG. 2 Wavy EdgesB754 178T = Thickness of MaterialH = Highest Point of IrregularitiesL = Measurement LengthB754 179NOTE 1For illustration only. Section to show measuring.B754 1710FIG. 3 BuckleB754 1711T
33、 = Thickness of MaterialH = Highest Point of IrregularitiesL = Measurement LengthB754 1712FIG. 4 Longitudinal CorrugationFIG. 5 HerringboneFIG. 6 Measuring Height of Irregularity With Height GageFIG. 7 Measuring Length of Irregularity With Steel RuleB754 1713SUMMARY OF CHANGESCommittee B05 has ident
34、ified the location of selected changes to this standard since the last issue(B754 - 10(2015)1) that may impact the use of this standard. (Approved May 1, 2015Oct. 1, 2017.)(1) This test method was reviewed and revised to comply with the selected wording in GuideA method to measure Coil Set wasinclud
35、ed in this B950.revision of the standard.ASTM International takes no position respecting the validity of any patent rights asserted in connection with any item mentionedin this standard. Users of this standard are expressly advised that determination of the validity of any such patent rights, and th
36、e riskof infringement of such rights, are entirely their own responsibility.This standard is subject to revision at any time by the responsible technical committee and must be reviewed every five years andif not revised, either reapproved or withdrawn.Your comments are invited either for revision of
37、 this standard or for additional standardsand should be addressed to ASTM International Headquarters. Your comments will receive careful consideration at a meeting of theresponsible technical committee, which you may attend. If you feel that your comments have not received a fair hearing you shouldm
38、ake your views known to the ASTM Committee on Standards, at the address shown below.This standard is copyrighted by ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959,United States. Individual reprints (single or multiple copies) of this standard may be obtained
39、 by contacting ASTM at the aboveaddress or at 610-832-9585 (phone), 610-832-9555 (fax), or serviceastm.org (e-mail); or through the ASTM website(www.astm.org). Permission rights to photocopy the standard may also be secured from the Copyright Clearance Center, 222Rosewood Drive, Danvers, MA 01923, Tel: (978) 646-2600; http:/ 8 Measuring Coil Set by Measuring Distance, D, from Vertical Wall that Top of Strip is Held AgainstB754 1714
