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Historical Revision

ASTM D4975-14

Standard Test Methods for Single-Filament Tire Bead Wire Made from Steel
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1.1 These test methods cover testing of single-filament steel wires that are components of tire beads used in the manufacture of pneumatic tires. By agreement, these test methods may be applied to similar filaments used for reinforcing other rubber products.

1.2 These test methods describe test procedures only and do not establish specifications and tolerances.

1.3 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard.

1.4 These test methods cover the determination of the mechanical properties listed below:

 

Property  

Section

 

 

Breaking Force (Strength)

 7 – 13

 

Yield Strength

 7 – 13

 

Elongation

 7 – 13

 

Torsion Resistance

14 – 20

 

Diameter (Gage)

21 – 27


1.5 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use.

1.1 Thesetestmethodscovertestingofsingle-filamentsteelwiresthatarecomponentsoftirebeadsusedinthemanufactureofpneumatictires.Byagreement,thesetestmethodsmaybeappliedtosimilarfilamentsusedforreinforcingotherrubberproducts.1.2 Thesetestmethodsdescribetestproceduresonlyanddonotestablishspecificationsandtolerances.1.3 ThevaluesstatedinSIunitsaretoberegardedasstandard.Nootherunitsofmeasurementareincludedinthisstandard.1.4 Thesetestmethodscoverthedeterminationofthemechanicalpropertieslistedbelow: Property  Section  BreakingForce(Strength) 7–13 YieldStrength 7–13 Elongation 7–13 TorsionResistance14–20 Diameter(Gage)21–27
1.5 Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappropriatesafetyandhealthpracticesanddeterminetheapplicabilityofregulatorylimitationspriortouse.
5.1 Theproceduresforthedeterminationofpropertiesofsingle-filamentbeadwiremadefromsteelareconsideredsatisfactoryforacceptancetestingofcommercialshipmentsofthisproductbecausetheproceduresarethebestavailableandhavebeenusedextensivelyinthetrade.5.1.1 Incaseofadisputearisingfromdifferencesinreportedtestresultswhenusingthesetestmethodsforacceptancetestingofcommercialshipments,thepurchaserandsuppliershouldconductcomparativetesttodetermineifthereisastatisticalbiasbetweentheirlaboratories.Competentstatisticalassistanceisrecommendedfortheinvestigationofbias.Asaminimum,thetwopartiesshouldtakeagroupoftestspecimenswhichareashomogeneousaspossibleandwhicharefromalotofmaterialofthetypeinquestion.Thetestspecimensthenshouldberandomlyassignedinequalnumbertoeachlaboratoryfortesting.TheaverageresultsfromthetwolaboratoriesshouldbecomparedusingStudent'st-testforunpaireddataandanacceptableprobabilitylevelchosenbythetwopartiesbeforetestingisbegun.Ifabiasisfound,eitheritscausemustbedeterminedandcorrectedorthepurchaserandthesuppliermustagreetointerpretfuturetestresultswithconsiderationtotheknownbias.
SDO ASTM: ASTM International
Document Number D4975
Publication Date May 15, 2014
Language en - English
Page Count 6
Revision Level 14
Supercedes
Committee D13.19
Publish Date Document Id Type View
Feb. 1, 2025 D4975-25 Revision
May 15, 2014 D4975-14 Revision
Jan. 1, 2011 D4975-04R11 Revision
Jan. 1, 2010 D4975-04R10 Revision
Oct. 1, 2004 D4975-04 Revision
Sept. 10, 2002 D4975-02A Revision
April 10, 2002 D4975-02 Revision
Jan. 1, 1996 D4975-96A Revision