ASTM D4975-04

Standard Test Methods for Single-Filament Tire Bead Wire Made from Steel

SIGNIFICANCE AND USE
The procedures for the determination of properties of single-filament bead wire made from steel are considered satisfactory for acceptance testing of commercial shipments of this product because the procedures are the best available and have been used extensively in the trade.
5.1.1 In case of a dispute arising from differences in reported test results when using these test methods for acceptance testing of commercial shipments, the purchaser and supplier should conduct comparative test to determine if there is a statistical bias between their laboratories. Competent statistical assistance is recommended for the investigation of bias. As a minimum, the two parties should take a group of test specimens which are as homogeneous as possible and which are from a lot of material of the type in question. The test specimens then should be randomly assigned in equal number to each laboratory for testing. The average results from the two laboratories should be compared using Student’t-test for unpaired data and an acceptable probability level chosen by the two parties before testing is begun. If a bias is found, either its cause must be determined and corrected or the purchaser and the supplier must agree to interpret future test results with consideration to the known bias.
SCOPE
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 This standard is written in SI units. No other units of measurement are included in this standard.
1.4 These test methods cover the determination of the mechanical properties listed below:
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.PropertySectionBreaking Force (Strength)7-13Yield Strength7-13Elongation7-13Torsion Resistance14-20Diameter (Gage)21-27

General Information

• Status: Historical
• Publication Date: 30-Sep-2004
• ICS: 77.140.65 - Steel wire, wire ropes and link chains
• ICS: 83.160.10 - Road vehicle tyres
• Technical Committee: D13 - Textiles
• Drafting Committee: D13.19 - Industrial Fibers and Metallic Reinforcements

Relations

• Replaces: ASTM D4975-02a - Standard Test Methods for Single-Filament Tire Bead Wire Made from Steel
• Effective Date: 01-Oct-2004
• Replaced By: ASTM D4975-04(2010) - Standard Test Methods for Single-Filament Tire Bead Wire Made from Steel
• Effective Date: 01-Jan-2010
• Referred By: ASTM D6477-23 - Standard Terminology Relating to Tire Cord, Bead Wire, Hose Reinforcing Wire, and Fabrics
• Effective Date: 01-Oct-2004

Standards Content (Sample)

NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.
Contact ASTM International (www.astm.org) for the latest information
Designation:D4975–04
Standard Test Methods for
1
Single-Filament Tire Bead Wire Made from Steel
This standard is issued under the fixed designation D 4975; the number immediately following the designation indicates the year of
original adoption or, in the case of revision, the year of last revision. A number in parentheses indicates the year of last reapproval. A
superscript epsilon (e) indicates an editorial change since the last revision or reapproval.
1. Scope E 6 Terminology Relating to Methods of Mechanical Test-
ing
1.1 These test methods cover testing of single-filament steel
E 558 Test Method for Torsion Testing of Wire
wiresthatarecomponentsoftirebeadsusedinthemanufacture
of pneumatic tires. By agreement, these test methods may be
3. Terminology
applied to similar filaments used for reinforcing other rubber
3.1 Definitions:
products.
3.1.1 Fordefinitionsoftermsrelatingtotirecord,beadwire,
1.2 These test methods describe test procedures only and do
hose wire, and tire cord fabrics, refer to Terminology D 6477.
not establish specifications and tolerances.
3.1.1.1 The following terms are relevant to this standard:
1.3 This standard is written in SI units. No other units of
percent elongation, tire bead, tire bead wire, torsion resistance,
measurement are included in this standard.
in tire bead wire, yield strength.
1.4 These test methods cover the determination of the
3.1.2 For definitions of terms related to force and deforma-
mechanical properties listed below:
tion in textiles, refer to Terminology D 4848
1.5 This standard does not purport to address all of the
3.1.2.1 The following terms are relevant to this standard:
safety concerns, if any, associated with its use. It is the
breaking force.
responsibility of the user of this standard to establish appro-
3.1.3 For definitions of other textile terms, refer to Termi-
priate safety and health practices and determine the applica-
nology D 123.
bility of regulatory limitations prior to use.
Property Section
4. Summary of Test Methods
Breaking Force (Strength) 7-13
4.1 A summary of the procedures prescribed for the deter-
Yield Strength 7-13
mination of specific properties of tire bead wire is stated in the
Elongation 7-13
appropriate sections of the specific test methods that follow.
Torsion Resistance 14-20
Diameter (Gage) 21-27
5. Significance and Use
2. Referenced Documents
5.1 The procedures for the determination of properties of
2
2.1 ASTM Standards:
single-filament bead wire made from steel are considered
A 370 Test Methods and Definitions for MechanicalTesting
satisfactory for acceptance testing of commercial shipments of
of Steel Products
this product because the procedures are the best available and
D 76 SpecificationforTensileTestingMachinesforTextiles
have been used extensively in the trade.
D 123 Terminology Relating to Textiles
5.1.1 In case of a dispute arising from differences in
D 2969 Test Method for Steel Tire Cords
reported test results when using these test methods for accep-
D 4848 Terminology of Force, Delamination, and Related
tance testing of commercial shipments, the purchaser and
Properties of Textiles
supplier should conduct comparative test to determine if there
D 6477 Terminology Relating to Tire Cord, Bead Wire,
is a statistical bias between their laboratories. Competent
Hose Reinforcing Wire and Fabrics
statistical assistance is recommended for the investigation of
bias.As a minimum, the two parties should take a group of test
1 specimens which are as homogeneous as possible and which
These test methods are under the jurisdiction of ASTM Committee D13 on
are from a lot of material of the type in question. The test
Textiles and are the direct responsibility of Subcommittee D13.19 on Tire Cord and
Fabrics.
specimens then should be randomly assigned in equal number
Current edition approved Oct. 1, 2004. Published October 2004. Originally
to each laboratory for testing.The average results from the two
published as D 4975 – 89. Last previous edition D 4975 – 02a.
2
laboratories should be compared using Student’s t-test for
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
contact ASTM Customer Service at [e-mail]. For Annual Book of ASTM unpaireddataandanacceptableprobabilitylevelchosenbythe
Standards volume information, refer to the standard’s Document Summary page on
two parties before testing is begun. If a bias is found, either its
the ASTM website.
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D4975–04
cause must be determined and corrected or the purchaser and computing equipment which may be programmed to calculate
the supplier must agree to interpret future test results with and print the results for each of these
...