ASTM D4975-02

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

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: 09-Apr-2002
• 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 D4975-96a - Standard Test Methods for Single-Filament Tire Bead Wire Made from Steel
• Effective Date: 10-Apr-2002
• Replaced By: ASTM D4975-02a - Standard Test Methods for Single-Filament Tire Bead Wire Made from Steel
• Effective Date: 10-Sep-2002
• Referred By: ASTM D6477-23 - Standard Terminology Relating to Tire Cord, Bead Wire, Hose Reinforcing Wire, and Fabrics
• Effective Date: 10-Apr-2002

Standards Content (Sample)

NOTICE: This standard has either been superceded and replaced by a new version or discontinued.
Contact ASTM International (www.astm.org) for the latest information.
Designation: D 4975 – 02
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 3. Terminology
1.1 These test methods cover testing of single-filament steel 3.1 Definitions:
wires that are components of tire beads used in the manufacture 3.1.1 For definitions of terms relating to tire cord and
of pneumatic tires. By agreement, these test methods may be fabrics, refer to Terminology D 6477.
applied to similar filaments used for reinforcing other rubber 3.1.2 For definitions of other textile terms, refer to Termi-
products. nology D 123.
1.2 These test methods describe test procedures only and do
4. Summary of Test Methods
not establish specifications and tolerances.
1.3 This standard is written in SI units. No other units of 4.1 A summary of the procedures prescribed for the deter-
mination of specific properties of tire bead wire is stated in the
measurement are included in this standard.
1.4 These test methods cover the determination of the appropriate sections of the specific test methods that follow.
mechanical properties listed below:
5. Significance and Use
1.5 This standard does not purport to address all of the
5.1 The procedures for the determination of properties of
safety concerns, if any, associated with its use. It is the
single-filament bead wire made from steel are considered
responsibility of the user of this standard to establish appro-
satisfactory for acceptance testing of commercial shipments of
priate safety and health practices and determine the applica-
this product because the procedures are the best available and
bility of regulatory limitations prior to use.
have been used extensively in the trade.
Property Section
5.1.1 If there are differences of practical significance be-
Breaking Force (Strength) 7-13
tween reported test results for two laboratories (or more),
Yield Strength 7-13
comparative tests should be performed to determine if there is
Elongation 7-13
Torsion Resistance 14-20
a statistical bias between them, using competent statistical
Diameter (Gage) 21-27
assistance. As a minimum, test samples should be used that are
as homogeneous as possible, that are drawn from the material
2. Referenced Documents
from which the disparate test results were obtained, and that
2.1 ASTM Standards:
are randomly assigned in equal numbers to each laboratory for
A 370 Test Methods and Definitions for Mechanical Testing
testing. Other materials with established test values may be
2
of Steel Products
used for this purpose. The test results from the two laboratories
D 76 Specification for Tensile Testing Machines for Tex-
should be compared using a statistical test for unpaired data, at
3
tiles
a probability level chosen prior to the testing series. If a bias is
3
D 123 Terminology Relating to Textiles
found, either its cause must be found and corrected, or future
3
D 2969 Test Method for Steel Tire Cords
test results for that material must be adjusted in consideration
4
D 6477 Terminology Relating to Tire Cord and Fabrics
of the known bias.
E 6 Terminology Relating to Methods of Mechanical Test-
5
ing
6. Sampling
5
E 558 Test Method for Torsion Testing of Wire
6.1 Lot Sample—As a lot sample for acceptance testing,
take at random the number of reels, coils, spools, or other
1 shipping units of wire directed in an applicable material
These test methods are under the jurisdiction of ASTM Committee D13 on
Textiles and are the direct responsibility of Subcommittee D13.19 on Tire Cord and specification or other agreement between the purchaser and the
Fabrics.
supplier. Consider reels, coils, spools, or other shipping units of
Current edition approved April 10, 2002. Published June 2002. Originally
wire to be the primary sampling units.
published as D 4975 – 89. Last previous edition D 4975 – 96a.
2
Annual Book of ASTM Standards, Vol 01.03.
NOTE 1—A realistic specification or other agreement between the
3
Annual Book of ASTM Standards, Vol 07.01.
purchaser and the supplier requires taking into account the variability
4
Annual Book of ASTM Standards, Vol 07.02.
between and within primary sampling units so as to provide a sampling
5
Annual Book of ASTM Standards, Vol 03.01.
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