ASTM_B_754_-_10_2015e1.pdf

Designation:B75410(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 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 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-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 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.1.6 The following safety hazard caveat pertains only to thetest method(s)described in this test method.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 Documents2.1 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 Specific 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 thickness 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.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 irregularities 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 large 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 B05 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,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.*A Summary of Changes section appears at the end of this standardCopyright ASTM International,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959.United States1 6.3 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)increments.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 referred 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 averag