1、Designation: B754 10 (Reapproved 2015)1Standard 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 or, in
2、 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.1NOTEEditorial changes were made in 1.1, 1.5 and 2.1 in May 2015.1. Scope*1.1 This test method
3、establishes a procedure for the mea-surement of distortions in thin metal strip and the application ofthese measurements to an equation that will indicate thedeviation from flatness.1.2 The distortions to be measured in this test method aredish, wavy edges, buckle, longitudinal corrugation, and her-
4、ringbone.1.3 This test method is not intended to include the measure-ment of coil set or longitudinal curl, camber or edgewisecurvature, or twist.1.4 This test method is limited to metal strip 0.003 to 0.020in. (0.08 to 0.50 mm) thick and not more than 6.0 in. (150.0mm) wide.1.5 UnitsThe values stat
5、ed 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.1.6 The following safety hazard caveat pertains only to thetest method(s) described in this test method
6、 This standard doesnot purport to address all of the safety concerns, if any,associated 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 Document
7、s2.1 ASTM Standards:2B846 Terminology for Copper and Copper AlloysB950 Guide for Editorial Procedures and Form of ProductSpecifications for Copper and Copper Alloys3. Terminology3.1 For determination of terms relating to copper and copperalloys, refer to Terminology B846.3.2 Definitions of Terms Spe
8、cific to This Standard:3.2.1 edge wave (see wavy edge), na continuous pattern ofwaves or wrinkles along the edges of the strip, with a relativelyflat center portion.4. Summary of Test Method4.1 A prepared test specimen of a specific wrought copperor copper alloy sheet or strip of a predetermined thi
9、ckness isplaced on a surface plate. The relative flatness of the sample isdetermined by measuring length and height of the irregularityand calculating percent of deviation.5. Significance and Use5.1 This test method is intended for measuring distortion instrip used for making close tolerance parts.
10、Since distortion inthis strip would influence the shape of the part being producedand cause difficulties in feeding through close-fitting dies andother manufacturing equipment, it is important that this mate-rial be flat.5.2 This test method provides a universal procedure formeasuring the irregulari
11、ties that cause the deviation fromflatness.5.3 This test method allows the purchaser and manufacturerto inspect strip with a standard technique to a mutually agreedupon and acceptable percentage deviation from flatness.6. Apparatus6.1 Surface Plate, to be used as a reference flat. It must havea larg
12、e enough surface area to accommodate the maximum sizetest specimen. It shall be flat within 0.0002 in. (0.005 mm) per1 in. (25 mm).6.2 Micrometer, for measuring metal thickness. It shall begraduated in 0.0001-in. (0.0025-mm) increments.1This test method is under the jurisdiction of ASTM Committee B0
13、5 on Copperand Copper Alloys and is the direct responsibility of Subcommittee B05.06 onMethods of Test.Current edition approved May 1, 2015. Published May 2015. Originallyapproved in 1986. Last previous edition approved 2010 as B754 10. DOI:10.1520/B0754-10R15E01.2For referenced ASTM standards, visi
14、t 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.*A Summary of Changes section appears at the end of this standardCopyright ASTM International, 10
15、0 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States16.3 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 graduatedin 0.001-in. (0.025-mm) increment
16、s.36.4 Steel Rule, for measuring the lengths of the irregulari-ties. It shall be graduated in 0.02-in. (0.50-mm) increments.7. Test Specimens7.1 The test specimen shall be the full-finished slit width ofthe strip and cut long enough so that measurement will not beinfluenced by the distortions referr
17、ed to in 1.3.7.2 When cutting specimens, caution must be taken toprevent 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 nearest0.001 in. (0.03 mm) using the micrometer. The average of thesesix readings
18、 will be used as T.8.2 Place the test strip unrestrained on the surface plate. Ifthe specimen is not flat, compare the irregularities observedwith the illustrations shown in Figs. 1-5 to determine the typeof distortion and how it should be measured.8.3 Using the height gage, measure the highest poin
19、t Hofeach 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 thepoints where the outer radii of the most significant irregularitytouches the surface plate, to the nearest 0.02 in. (0.50 mm). SeeFigs. 1-7.8.5 Repeat this proce
20、dure as often as necessary to satisfyquality level requirements, recording each measurement.9. Calculation or Interpretation of Results9.1 Apply the values for T, H, and L obtained for eachirregularity to the following equation to determine the percent-age of deviation from flat.Deviation from flat,
21、 % 5H 2 TL3100 (1)Compare the results to the agreed upon limits. The larger thepercentage, the greater the deviation from flat.10. 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 thethickness, h
22、eight, length, and percent deviation from flatnessfor each should be reported.11. Precision and Bias11.1 The precision of this test method is dependent upon thesensitivity of the measuring apparatus.11.2 This test method has no bias because the values ofdeviation from flatness are direct measurement
23、s based on theaccuracy of the test apparatus and the observations of theinspector.12. Keywords12.1 edge wave; flatness measurement; strip distortion; stripflatness; wavy edge3An electronic touch sensitive system, which will not distort the sample, hasbeen found to be acceptable.FIG. 1 DishB754 10 (2
24、015)12FIG. 2 Wavy EdgesNOTE 1For illustration only. Section to show measuring.FIG. 3 BuckleFIG. 4 Longitudinal CorrugationB754 10 (2015)13FIG. 5 HerringboneFIG. 6 Measuring Height of Irregularity With Height GageFIG. 7 Measuring Length of Irregularity With Steel RuleB754 10 (2015)14SUMMARY OF CHANGE
25、SCommittee B05 has identified the location of selected changes to this standard since the last issue (B754 - 10)that may impact the use of this standard. (Approved May 1, 2015.)(1) This test method was reviewed and revised to comply withthe selected wording in Guide B950.ASTM International takes no
26、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 the riskof infringement of such rights, are entirely their own responsi
27、bility.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 this standard or for additional standardsand should be addressed to
28、 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 shouldmake your views known to the ASTM Committee on Standards, at the addr
29、ess 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 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:/ 10 (2015)15
