GB/T 8358-2014 English PDF (GB/T8358-2014)

GB/T 8358-2014: Steel wire ropes -- Determination of measured breaking force
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GB/T 8358-2014
GB
NATIONAL STANDARD OF THE
PEOPLE’S REPUBLIC OF CHINA
ICS 77.040.10
H 22
Replacing GB/T 8358-2006
Steel Wire Rope –
Determination of Measured Breaking Force
(ISO 3108.1974, Steel Wire Rope for General
Purposes – Determination of Actual Breaking Load, NEQ)
ISSUED ON. JUNE 9, 2014
IMPLEMENTED ON. JANUARY 1, 2015
Issued by. General Administration of Quality Supervision, Inspection and
Quarantine;
Standardization Administration of PRC.
Table of Contents
Foreword ... 3
1 Scope ... 5
2 Normative References ... 5
3 Terms and Definitions ... 5
4 Principle ... 6
5 Specimen preparation ... 6
6 Test Equipment ... 9
7 Test Procedures ... 9
8 Test Report ... 10
Foreword
This Standard was drafted as per the rules specified in GB/T 1.1-2009.
This Standard replaced GB/T 8358-2006 Method of Breaking Tensile Test for Steel
Wire Ropes; compared with GB/T 8358-2006, this Standard makes significant changes
and supplements in the aspect of the following technical contents.
--- Modify the standard name;
--- Modify the normative references;
--- Delete the terms and definitions on minimum breaking force and measured
breaking force;
--- Add the requirement for minimum test length of single-strand steel wire rope;
--- Increase the requirement for minimum test length ≥3000mm of the steel wire
rope with nominal diameter d>60mm;
--- Refine the specimen preparation by method of alloy poured socketing and
method of ferrule pressing;
--- Increase the clause on the specimen preparation by method of resign pouring;
--- Delete the clause on the specimen preparation by method of direct gripping, and
method of wrapping.
--- Adjust the provision on judging whether the test results are effective from
“breaking within 1d (30mm) away from grip holder” to “breaking within the less
one between 6d away from grip holder and 50mm”;
--- Delete Appendix A, Appendix B, Appendix C.
This Standard adopts the re-drafting method to prepare in reference to ISO 3108. 1974
Steel Wire Rope for General Purposes – Determination of Actual Breaking Load; this
Standard is not equivalent to ISO 3108.1974 in the aspect of consistency degree.
This Standard was proposed by China Iron and Steel Industry Association.
This Standard shall be under the jurisdiction of National Technical Committee for
Standardization of Steel (SAC/TC 183).
Drafting organizations of this Standard. National Quality Supervision and Inspection
Center for Metal Products, Shanghai Entry-Exit Inspection and Quarantine Bureau,
Shanghai Zhengshen Metal Products Co., Ltd., China Metallurgical Information and
Standardization Institute, Guizhou Wire Rope Co., Ltd., Juli Sling Co., Ltd., and Wuxi
Steel Wire Rope –
Determination of Measured Breaking Force
1 Scope
This Standard specifies the terms and definitions, test principles, specimen preparation,
test equipment, test procedures, test report and the like for determination of measured
breaking force of steel wire rope.
This Standard is applicable to the determination of measured breaking force of various
steel wire ropes. Method of alloy poured socketing is suitable for the steel wire rope
with diameter greater than and equal to 6mm or 0.5mm; method of resign pouring and
method of ferrule pressing are suitable for all types of steel wire rope; method of direct
gripping is suitable for the single-strand steel wire rope, it is also suitable for other
structures of steel wire rope; the method of wrapping is suitable for the steel wire rope
with diameter no greater than 20mm.
2 Normative References
The following documents are essential to the application of this document. For the
dated documents, only the versions with the dates indicated are applicable to this
document; for the undated documents, only the latest version (including all the
amendments) are applicable to this document.
GB/T 8706 Steel Wire Rope – Vocabulary, Designation and Classification (GB/T
8706-2006, ISO 17893.2004, IDT)
GB/T 16825.1 Verification of Static Uniaxial Test Machines – Part 1.
Tension/Compression Testing Machines – Verification and Calibration of the
Force-Measuring System (GB/T 16825.1-2008, ISO 7500-1.2004, IDT)
3 Terms and Definitions
The following terms and definitions stipulated in GB/T 8706 are applicable to this
document.
3.1 Force at first wire breaking
The tensile strength of the first wire breaking during the tensile test of the steel wire
rope.
specimen surface.
6 Test Equipment
This test can be carried out on any tensile tester that meets the requirements of
this Standard.
The tester force-measuring system shall be calibrated as per GB/T 16825.1; its
accuracy shall be Class-1 or above.
7 Test Procedures
7.1 Unless otherwise is specified, the test shall be carried out at the room
temperature of 10°C~35°C. For the test with strict requirements for the
temperature, the test temperature shall be 23°C±5°C.
7.2 Install the specimen onto the tester, and ensure the specimen axis coincides
with the axis of the tester grip holder.
7.3 For the tensile specimen by pouring method, when using vertical tensile
tester to test, firstly place the specimen into the upper and lower jaw seats, make
the specimen suspend into the jaw seats; return the tester to zero, then perform
the tensile test.
7.4 For the method of ferrule pressing, directly grip the pressed ferrule specimen
into the jaw; then the tensile test can be performed.
7.5 For the method of direct gripping, use appropriate fixture; in necessary,
sandwich an aluminum foil stained with emery between specimen and fixture, so
that avoid the fixture damage the specimen.
7.6 For the method of wrapping, firstly fix one end of specimen onto the test
wheel; then wrap the specimen on the test wheel; stretch the specimen; finally fix
the other end of specimen, then the tensile test can be performed.
7.7 Smoothly loading during the test period. When exerting the test force, if it is
no greater than 80% minimum breaking force of steel wire rope, the test force can
be exerted at a fast speed; if the test force is greater than 80% minimum breaking
force of steel wire rope, the test force shall be exerted at a slow speed; the force
increasing speed shall not exceed 0.5% minimum breaking force per second.
7.8 Take effective measures during the test period, prevent the rotation of steel
wire rope specimen, and avoid the influence on the accuracy of the test results.
7.9 If the steel wire rope specimen is broken within 6d or 50mm (take the less
GB/T 8358-2014
GB
NATIONAL STANDARD OF THE
PEOPLE’S REPUBLIC OF CHINA
ICS 77.040.10
H 22
Replacing GB/T 8358-2006
Steel Wire Rope –
Determination of Measured Breaking Force
(ISO 3108.1974, Steel Wire Rope for General
Purposes – Determination of Actual Breaking Load, NEQ)
ISSUED ON. JUNE 9, 2014
IMPLEMENTED ON. JANUARY 1, 2015
Issued by. General Administration of Quality Supervision, Inspection and
Quarantine;
Standardization Administration of PRC.
Table of Contents
Foreword ... 3
1 Scope ... 5
2 Normative References ... 5
3 Terms and Definitions ... 5
4 Principle ... 6
5 Specimen preparation ... 6
6 Test Equipment ... 9
7 Test Procedures ... 9
8 Test Report ... 10
Foreword
This Standard was drafted as per the rules specified in GB/T 1.1-2009.
This Standard replaced GB/T 8358-2006 Method of Breaking Tensile Test for Steel
Wire Ropes; compared with GB/T 8358-2006, this Standard makes significant changes
and supplements in the aspect of the following technical contents.
--- Modify the standard name;
--- Modify the normative references;
--- Delete the terms and definitions on minimum breaking force and measured
breaking force;
--- Add the requirement for minimum test length of single-strand steel wire rope;
--- Increase the requirement for minimum test length ≥3000mm of the steel wire
rope with nominal diameter d>60mm;
--- Refine the specimen preparation by method of alloy poured socketing and
method of ferrule pressing;
--- Increase the clause on the specimen preparation by method of resign pouring;
--- Delete the clause on the specimen preparation by method of direct gripping, and
method of wrapping.
--- Adjust the provision on judging whether the test results are effective from
“breaking within 1d (30mm) away from grip holder” to “breaking within the less
one between 6d away from grip holder and 50mm”;
--- Delete Appendix A, Appendix B, Appendix C.
This Standard adopts the re-drafting method to prepare in reference to ISO 3108. 1974
Steel Wire Rope for General Purposes – Determination of Actual Breaking Load; this
Standard is not equivalent to ISO 3108.1974 in the aspect of consistency degree.
This Standard was proposed by China Iron and Steel Industry Association.
This Standard shall be under the jurisdiction of National Technical Committee for
Standardization of Steel (SAC/TC 183).
Drafting organizations of this Standard. National Quality Supervision and Inspection
Center for Metal Products, Shanghai Entry-Exit Inspection and Quarantine Bureau,
Shanghai Zhengshen Metal Products Co., Ltd., China Metallurgical Information and
Standardization Institute, Guizhou Wire Rope Co., Ltd., Juli Sling Co., Ltd., and Wuxi
Steel Wire Rope –
Determination of Measured Breaking Force
1 Scope
This Standard specifies the terms and definitions, test principles, specimen preparation,
test equipment, test procedures, test report and the like for determination of measured
breaking force of steel wire rope.
This Standard is applicable to the determination of measured breaking force of various
steel wire ropes. Method of alloy poured socketing is suitable for the steel wire rope
with diameter greater than and equal to 6mm or 0.5mm; method of resign pouring and
method of ferrule pressing are suitable for all types of steel wire rope; method of direct
gripping is suitable for the single-strand steel wire rope, it is also suitable for other
structures of steel wire rope; the method of wrapping is suitable for the steel wire rope
with diameter no greater than 20mm.
2 Normative References
The following documents are essential to the application of this document. For the
dated documents, only the versions with the dates indicated are applicable to this
document; for the undated documents, only the latest version (including all the
amendments) are applicable to this document.
GB/T 8706 Steel Wire Rope – Vocabulary, Designation and Classification (GB/T
8706-2006, ISO 17893.2004, IDT)
GB/T 16825.1 Verification of Static Uniaxial Test Machines – Part 1.
Tension/Compression Testing Machines – Verification and Calibration of the
Force-Measuring System (GB/T 16825.1-2008, ISO 7500-1.2004, IDT)
3 Terms and Definitions
The following terms and definitions stipulated in GB/T 8706 are applicable to this
document.
3.1 Force at first wire breaking
The tensile strength of the first wire breaking during the tensile test of the steel wire
rope.
specimen surface.
6 Test Equipment
This test can be carried out on any tensile tester that meets the requirements of
this Standard.
The tester force-measuring system shall be calibrated as per GB/T 16825.1; its
accuracy shall be Class-1 or above.
7 Test Procedures
7.1 Unless otherwise is specified, the test shall be carried out at the room
temperature of 10°C~35°C. For the test with strict requirements for the
temperature, the test temperature shall be 23°C±5°C.
7.2 Install the specimen onto the tester, and ensure the specimen axis coincides
with the axis of the tester grip holder.
7.3 For the tensile specimen by pouring method, when using vertical tensile
tester to test, firstly place the specimen into the upper and lower jaw seats, make
the specimen suspend into the jaw seats; return the tester to zero, then perform
the tensile test.
7.4 For the method of ferrule pressing, directly grip the pressed ferrule specimen
into the jaw; then the tensile test can be performed.
7.5 For the method of direct gripping, use appropriate fixture; in necessary,
sandwich an aluminum foil stained with emery between specimen and fixture, so
that avoid the fixture damage the specimen.
7.6 For the method of wrapping, firstly fix one end of specimen onto the test
wheel; then wrap the specimen on the test wheel; stretch the specimen; finally fix
the other end of specimen, then the tensile test can be performed.
7.7 Smoothly loading during the test period. When exerting the test force, if it is
no greater than 80% minimum breaking force of steel wire rope, the test force can
be exerted at a fast speed; if the test force is greater than 80% minimum breaking
force of steel wire rope, the test force shall be exerted at a slow speed; the force
increasing speed shall not exceed 0.5% minimum breaking force per second.
7.8 Take effective measures during the test period, prevent the rotation of steel
wire rope specimen, and avoid the influence on the accuracy of the test results.
7.9 If the steel wire rope specimen is broken within 6d or 50mm (take the less