ASTM D4975-04(2010)
(Test Method)Standard Test Methods for Single-Filament Tire Bead Wire Made from Steel
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.
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's 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 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard.
General Information
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Standards Content (Sample)
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Designation:D4975–04 (Reapproved 2010)
Standard Test Methods for
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Single-Filament Tire Bead Wire Made from Steel
This standard is issued under the fixed designation D4975; 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 (´) indicates an editorial change since the last revision or reapproval.
1. Scope 3. Terminology
1.1 These test methods cover testing of single-filament steel 3.1 Definitions:
wiresthatarecomponentsoftirebeadsusedinthemanufacture 3.1.1 Fordefinitionsoftermsrelatingtotirecord,beadwire,
of pneumatic tires. By agreement, these test methods may be hose wire, and tire cord fabrics, refer to Terminology D6477.
applied to similar filaments used for reinforcing other rubber 3.1.1.1 The following terms are relevant to this standard:
products. percent elongation, tire bead, tire bead wire, torsion resistance,
1.2 These test methods describe test procedures only and do in tire bead wire, yield strength.
not establish specifications and tolerances. 3.1.2 For definitions of terms related to force and deforma-
1.3 The values stated in SI units are to be regarded as tion in textiles, refer to Terminology D4848
standard. No other units of measurement are included in this 3.1.2.1 The following terms are relevant to this standard:
standard. breaking force.
1.4 These test methods cover the determination of the 3.1.3 For definitions of other textile terms, refer to Termi-
mechanical properties listed below: nology D123.
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
Torsion Resistance 14-20
appropriate sections of the specific test methods that follow.
Diameter (Gage) 21-27
5. Significance and Use
1.5 This standard does not purport to address all of the
safety concerns, if any, associated with its use. It is the 5.1 The procedures for the determination of properties of
responsibility of the user of this standard to establish appro- single-filament bead wire made from steel are considered
satisfactory for acceptance testing of commercial shipments of
priate safety and health practices and determine the applica-
bility of regulatory limitations prior to use. this product because the procedures are the best available and
have been used extensively in the trade.
2. Referenced Documents
5.1.1 In case of a dispute arising from differences in
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2.1 ASTM Standards: reported test results when using these test methods for accep-
D76 Specification for Tensile Testing Machines for Textiles tance testing of commercial shipments, the purchaser and
D123 Terminology Relating to Textiles supplier should conduct comparative test to determine if there
D4848 Terminology Related to Force, Deformation and is a statistical bias between their laboratories. Competent
Related Properties of Textiles statistical assistance is recommended for the investigation of
D6477 Terminology Relating to Tire Cord, Bead Wire,
bias.As a minimum, the two parties should take a group of test
Hose Reinforcing Wire, and Fabrics 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
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These test methods are under the jurisdiction of ASTM Committee D13 on
to each laboratory for testing.The average results from the two
Textiles and are the direct responsibility of Subcommittee D13.19 on Industrial
laboratories should be compared using Student’s t-test for
Fibers and Metallic Reinforcements.
Current edition approved Jan. 1, 2010. Published August 2010. Originally
unpaireddataandanacceptableprobabilitylevelchosenbythe
approved in 1989. Last previous edition approved in 2004 as D4975–04. DOI:
two parties before testing is begun. If a bias is found, either its
10.1520/D4975-04R10.
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cause must be determined and corrected or the purchaser and
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
Standards volume information, refer to the standard’s Document Summary page on
the ASTM website.
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D4975–04 (2010)
the supplier must agree to interpret future test results with and print the results for each of these desired properties.
consideration to the known bias. Because of the variety of electronic equipment available and
the various possibilities for recording test data,
...
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