GB/T 8358-2023_English: PDF (GB/T8358-2023)
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Steel wire ropes -- Determination of breaking force
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GB/T 8358-2014 | English | 70 |
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Steel wire ropes -- Determination of measured breaking force
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GB/T 8358-2006 | English | 359 |
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Breaking rope tensile test method
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Method of breaking tensile test for steel wire rope
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Standard ID | GB/T 8358-2023 (GB/T8358-2023) | Description (Translated English) | Steel wire ropes -- Determination of breaking force | Sector / Industry | National Standard (Recommended) | Classification of Chinese Standard | H22 | Classification of International Standard | 77.040.10 | Word Count Estimation | 11,138 | Date of Issue | 2023-05-23 | Date of Implementation | 2023-12-01 | Older Standard (superseded by this standard) | GB/T 8358-2014 | Drafting Organization | Sinosteel Zhengzhou Metal Products Research Institute Co., Ltd. (National Metal Products Quality Inspection and Testing Center), Shanghai Shenli Testing Machine Co., Ltd., Kunshan East Coast Ocean Engineering Co., Ltd., Shanghai Customs Industrial Products and Raw Materials Testing Technology Center, Nantong Products Quality Supervision and Inspection Institute (National Steel Wire Rope Product Quality Inspection and Testing Center), Juli Rigging Co., Ltd., Metallurgical Industry Information Standard Research Institute | Administrative Organization | National Steel Standardization Technical Committee (SAC/TC 183) | Proposing organization | China Iron and Steel Association | Issuing agency(ies) | State Administration for Market Regulation, National Standardization Management Committee | Standard ID | GB/T 8358-2014 (GB/T8358-2014) | Description (Translated English) | Steel wire ropes. Determination of measured breaking force | Sector / Industry | National Standard (Recommended) | Classification of Chinese Standard | H22 | Classification of International Standard | 77.040.10 | Word Count Estimation | 7,766 | Date of Issue | 2014/6/9 | Date of Implementation | 2015/1/1 | Older Standard (superseded by this standard) | GB/T 8358-2006 | Quoted Standard | GB/T 8706; GB/T 16825.1 | Adopted Standard | ISO 3108-1974, NEQ | Drafting Organization | National Metal Products Quality Supervision and Inspection Center | Administrative Organization | National Steel Standardization Technical Committee | Regulation (derived from) | National Standards Bulletin No. 11 of 2014 | Proposing organization | China Iron and Steel Association | Issuing agency(ies) | General Administration of Quality Supervision, Inspection and Quarantine of the People's Republic of China, Standardization Administration of the People's Republic of China | Summary | This Standard specifies the actual rope breaking force measurement method terminology and definitions, test principle, specimen preparation, test equipment, test procedures, test reports. This Standard applies to all kinds of wire rope products, the actua | Standard ID | GB/T 8358-2006 (GB/T8358-2006) | Description (Translated English) | Breaking rope tensile test method | Sector / Industry | National Standard (Recommended) | Classification of Chinese Standard | H22 | Classification of International Standard | 77.040.10 | Word Count Estimation | 9,982 | Date of Issue | 2006-03-01 | Date of Implementation | 2006-09-01 | Older Standard (superseded by this standard) | GB/T 8358-1987 | Quoted Standard | GB/T 6946; GB/T 3191; GB/T 16825.1 | Adopted Standard | ISO 3108-1974, NEQ | Drafting Organization | Zhengzhou Institute of Metal Products | Administrative Organization | National Steel Standardization Technical Committee | Regulation (derived from) | China National Standard Approval Announcement 2006 No.3 (Total No.90); National Standard Announcement 2014 No.11 | Proposing organization | China Iron and Steel Association | Issuing agency(ies) | Administration of Quality Supervision, Inspection and Quarantine of People's Republic of China; Standardization Administration of China | Summary | This standard specifies the rope breaking tensile test method terminology and definitions, specimen preparation, , test principle test equipment, test procedures and test reports and other content. This standard applies to all types of wire rope, strand of products-Determination of tensile breaking. As otherwise provided in the relevant product standard, according to their regulations. |
GB/T 8358-2023
GB
NATIONAL STANDARD OF THE
PEOPLE’S REPUBLIC OF CHINA
ICS 77.040.10
CCS H 22
Replacing GB/T 8358-2014
Steel wire ropes - Determination of breaking force
(ISO 3108:2017, Steel wire ropes - Test method - Determination of measured
breaking force, MOD)
ISSUED ON: MAY 23, 2023
IMPLEMENTED ON: DECEMBER 01, 2023
Issued by: State Administration for Market Regulation;
Standardization Administration of the People's Republic of China.
Table of Contents
Foreword ... 3
1 Scope ... 6
2 Normative references ... 6
3 Terms and definitions ... 6
4 Principle ... 8
5 Specimen preparation ... 8
6 Test equipment ... 11
7 Test procedures ... 11
8 Test report ... 12
Annex A (informative) Method of grouting material pouring ... 13
Bibliography ... 15
Steel wire ropes - Determination of breaking force
1 Scope
This document specifies the principles, specimen preparation, test equipment, test
procedures, and test reports for the method to determine the breaking tensile force of
steel wire ropes.
This document is applicable to the determination of breaking force of various wire rope
products.
2 Normative references
The following referenced documents are indispensable for the application of this
document. For dated references, only the edition cited applies. For undated references,
the latest edition of the referenced document (including any amendments) applies.
GB/T 8706, Steel wire ropes -- Vocabulary, designation and classification (GB/T
8706-2017, ISO 17893:2004, MOD)
GB/T 16825.1, Metallic materials -- Calibration and verification of static uniaxial
testing machines -- Part 1: Tension/compression testing machines -- Calibration and
verification of the force-measuring system (GB/T 16825.1-2008, ISO 7500-1:2004,
IDT)
GB/T 30588, Terminations for steel wire ropes -- Molten metal socketing
YB/T 4615, Steel rope end resin socket
JJG 139, Verification regulation of Tension, Compression and Universal Testing
Machines
JJG 475, Verification Regulation of Electronic Universal Testing Machine
JJG 1063, Verification Regulation of Electro-hydraulic Servo Universal Testing
Machines
3 Terms and definitions
For the purposes of this document, the terms and definitions defined in GB/T 8706 as
well as the followings apply.
A specimen installation method is to clamp the specimen directly into the appropriate
jaws of the tensile testing machine for tensile testing.
3.9 method of wrapping
A specimen installation method that is to directly wrap the specimen in the rope groove
of the winding test wheel for tensile testing.
4 Principle
Apply tensile force to the wire rope specimen. Stretch until the wire rope breaks.
Determine the breaking tension of the wire rope, or stretch it to the specified tension
value.
5 Specimen preparation
5.1 General requirements
5.1.1 The wire rope specimen can be intercepted by grinding wheel cutting, pressure
cutting or shear cutting. The specimen taken shall avoid the molten part at the end of
the wire rope.
5.1.2 In order to prevent the wire rope from loosening and the geometric position of the
strands and wires from changing, sufficient loosening or clamping length shall be
reserved at both ends before intercepting the specimen. Tie firmly with low carbon steel
wire.
5.1.3 For unused wire ropes, test specimens shall be taken from the wire ropes that are
not damaged during visual inspection. The intercepted wire rope specimen shall be
straight. There shall be no bending or damage.
5.1.4 For used wire ropes, test specimens shall be taken from the wire ropes confirmed
by the relevant parties.
5.1.5 The minimum effective test section length (that is, the distance between the two
chucks) shall comply with the requirements in Table 1.
NOTE: For thick-diameter wire ropes, the minimum test section length is generally 6 times the wire
rope pitch.
5.1.6 The total length of the specimen is equal to the length of the test section plus the
clamping length at both ends of the specimen.
1 - Jaw seat;
2 - Clamping block;
3 - Specimen;
4 - Packing;
d - Nominal diameter of wire rope;
L - Minimum effective test section length.
Figure 2 -- Schematic diagram of specimen using method of direct gripping
5.5 Method of wrapping
5.5.1 The winding test wheel shall be selected to match the diameter of the wire rope.
The ratio of the diameter of the winding test wheel to the diameter of the wire rope shall
not be less than 16.
5.5.2 The diameter of the rope groove around the test wheel shall be controlled within
the range of 1.06 to 1.10 times the nominal diameter of the wire rope.
5.5.3 The method of wrapping is suitable for wire ropes with a diameter not larger than
20 mm.
6 Test equipment
6.1 This test can be performed on any tensile testing machine that meets the
requirements of this document.
6.2 The force measuring system of the testing machine shall comply with the
requirements of GB/T 16825.1. Calibrate in accordance with JJG 139, JJG 475 or JJG
1063. Its accuracy shall be grade 1 or better.
6.3 The testing machine shall be equipped with safety protection devices to prevent
wires from flying out and injuring people during the test.
7 Test procedures
7.1 Unless otherwise specified, the test is generally conducted at room temperature
within the range of 10℃~35℃. For tests with strict temperature requirements, the test
temperature shall be 23℃±5℃.
7.2 Mount the specimen on the tensile testing machine. Ensure that the axis of the
specimen coincides with the axis of the chuck of the testing machine.
7.3 For tensile specimens produced by method of alloy poured socketing or method of
resin pouring, when testing with a vertical tensile testing machine, first place the
specimen in the upper and lower jaw seats. Let the specimen in the lower jaw seat hang
Annex A
(informative)
Method of grouting material pouring
A.1 Cement-based grouting material
Cement-based grouting materials are made of raw materials such as cement, aggregates,
admixtures and mineral admixtures, which are measured and mixed in proportions in
professional chemical plants. Add water or mix the supporting components according
to the specified proportion at the place of use. Use it for bolt anchoring, structural
reinforcement, prestressed tunnels, etc.
The grouting material used shall comply with the requirements of GB/T 50488.
A.2 Method of grouting material pouring
A.2.1 The mold used for pouring shall be easy to disassemble. The inner surface in
contact with the grouting material shall be smooth and clean.
A.2.2 The bundling, end breaking, and surface cleaning of the specimens shall comply
with the requirements of 5.2.4.
A.2.3 Place the cleaned broom head into the mold and adjust it. Pour the mixed grouting
material into the mold. Use a thin steel rod to pound continuously to remove the air
from the pouring body until it is filled. Then place the poured specimen at room
temperature for 3h to 4 h before demoulding. Figure 1 is a schematic diagram of the
sample prepared using this method.
A.3 Maintenance
A.3.1 After demoulding, the specimens are placed in a high-temperature steam curing
box for steam curing. The heating rate shall not be greater than 12℃/h. After the
temperature is raised to 80°C, the constant temperature (80°C±5°C) is maintained for
more than 48 h until the compressive strength of the specimen cured under the same
conditions reaches 80 MPa.
A.3.2 When pouring the steel wire rope, a grouting material specimen (specimen size:
40 mm × 40 mm × 160 mm) is formed at the same time and maintained under the same
conditions as the steel wire rope. After the specimen is cured, the compressive strength
test is carried out in accordance with the requirements of GB/T 17671. When the
strength meets the requirements, a breaking tensile test of the wire rope is carried out.
NOTE 1: Generally, high-strength grouting materials are used to avoid invalid fracture locations
affecting the test results.
......
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
......
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