ASTM_D_4975_-_14.pdf

Designation:D497514Standard Test Methods forSingle-Filament Tire Bead Wire Made from Steel1This standard is issued under the fixed designation D4975;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.1.Scope1.1 These test methods cover testing of single-filament steelwires that are components of tire beads used in the manufactureof pneumatic tires.By agreement,these test methods may beapplied to similar filaments used for reinforcing other rubberproducts.1.2 These test methods describe test procedures only and donot establish specifications and tolerances.1.3 The values stated in SI units are to be regarded asstandard.No other units of measurement are included in thisstandard.1.4 These test methods cover the determination of themechanical properties listed below:PropertySectionBreaking Force(Strength)7 13Yield Strength7 13Elongation7 13Torsion Resistance14 20Diameter(Gage)21 271.5 This standard does not purport to address all of thesafety concerns,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:2D76 Specification for Tensile Testing Machines for TextilesD123 Terminology Relating to TextilesD4848 Terminology Related to Force,Deformation andRelated Properties of TextilesD6477 Terminology Relating to Tire Cord,Bead Wire,HoseReinforcing Wire,and Fabrics3.Terminology3.1 Definitions:3.1.1 For definitions of terms relating to tire cord,bead wire,hose wire,and tire cord fabrics,refer to Terminology D6477.3.1.1.1 The following terms are relevant to this standard:percent elongation,tire bead,tire bead wire,torsion resistance,in tire bead wire,yield strength.3.1.2 For definitions of terms related to force and deforma-tion in textiles,refer to Terminology D48483.1.2.1 The following terms are relevant to this standard:breaking force.3.1.3 For definitions of other textile terms,refer to Termi-nology D123.4.Summary of Test Methods4.1 A summary of the procedures prescribed for the deter-mination of specific properties of tire bead wire is stated in theappropriate sections of the specific test methods that follow.5.Significance and Use5.1 The procedures for the determination of properties ofsingle-filament bead wire made from steel are consideredsatisfactory for acceptance testing of commercial shipments ofthis product because the procedures are the best available andhave been used extensively in the trade.5.1.1 In case of a dispute arising from differences inreported test results when using these test methods for accep-tance testing of commercial shipments,the purchaser andsupplier should conduct comparative test to determine if thereis a statistical bias between their laboratories.Competentstatistical assistance is recommended for the investigation ofbias.As a minimum,the two parties should take a group of testspecimens which are as homogeneous as possible and whichare from a lot of material of the type in question.The testspecimens then should be randomly assigned in equal numberto each laboratory for testing.The average results from the twolaboratories should be compared using Students t-test forunpaired data and an acceptable probability level chosen by thetwo parties before testing is begun.If a bias is found,either itscause must be determined and corrected or the purchaser andthe supplier must agree to interpret future test results withconsideration to the known bias.1These test methods are under the jurisdiction of ASTM Committee D13 onTextiles and are the direct responsibility of Subcommittee D13.19 on IndustrialFibers and Metallic Reinforcements.Current edition approved May 15,2014.Published June 2014.Originallyapproved in 1989.Last previous edition approved in 2011 as D497504(2011).DOI:10.1520/D4975-14.2For 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.Copyright ASTM International,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959.United States1 6.Sampling6.1 Lot SampleAs a lot sample for acceptance testing,takeat random the number of reels,coils,spools,or other shippingunits of wire directed in an applicable material specification orother agreement between the purchaser and the supplier.Consider reels,coils,spools,or other shipping units of wire tobe the primary sampling units.NOTE1A realistic specification or other agreement between thepurchaser and the supplier requires taking into account the variabilitybetween and within primary sampling units so as to provide a samplingplan wh