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GB/T 20118-2017 English PDF (GB/T 20118-2006)

GB/T 20118-2017_English: PDF (GB/T20118-2017)
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GB/T 20118-2017English999 Add to Cart 7 days [Need to translate] Steel wire ropes for general purposes Valid GB/T 20118-2017
GB/T 20118-2006EnglishRFQ ASK 6 days [Need to translate] Steel wire ropes for general purpose Obsolete GB/T 20118-2006


BASIC DATA
Standard ID GB/T 20118-2017 (GB/T20118-2017)
Description (Translated English) Steel wire ropes for general purposes
Sector / Industry National Standard (Recommended)
Classification of Chinese Standard H49
Classification of International Standard 77.140.65
Word Count Estimation 50,513
Date of Issue 2017-12-29
Date of Implementation 2018-09-01
Older Standard (superseded by this standard) GB/T 20118-2006
Drafting Organization Guizhou Steel Wire Co., Ltd.
Administrative Organization National Steel Standardization Technical Committee
Regulation (derived from) National Standards Bulletin 2017 No. 32
Proposing organization China Iron and Steel Association
Issuing agency(ies) People's Republic of China General Administration of Quality Supervision, Inspection and Quarantine, China National Standardization Administration

BASIC DATA
Standard ID GB/T 20118-2006 (GB/T20118-2006)
Description (Translated English) Steel wire ropes for general purpose
Sector / Industry National Standard (Recommended)
Classification of Chinese Standard H49
Classification of International Standard 77.140.65
Word Count Estimation 51,534
Date of Issue 2006-03-01
Date of Implementation 2006-09-01
Older Standard (superseded by this standard) GB/T 8918-1996
Quoted Standard GB/T 228; GB/T 238; GB/T 239; GB/T 2104; GB/T 2973
Adopted Standard ISO/DIS 2408-2002, MOD
Drafting Organization Guizhou Wire Rope Co., Ltd.
Administrative Organization National Steel Standardization Technical Committee
Regulation (derived from) National Standard Approval Announcement 2006 No.3 (Total No.90)
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 classification of wire rope, ordering content, materials, technical requirements, inspection, trial, inspection methods, packaging, marking and quality certification. This standard applies to machinery, construction, ship, various round strand wire rope tramway and other industries use, fisheries, forestry, mining.


GB/T 20118-2017 Steel wire ropes for general purposes ICS 77.140.65 H49 National Standards of People's Republic of China Replace GB/T 20118-2006 General technical conditions for wire rope (ISO 2408.2017, Steelwireropes-Requirements, NEQ) Released on.2017-12-29 2018-09-01 implementation General Administration of Quality Supervision, Inspection and Quarantine of the People's Republic of China China National Standardization Administration issued Content Foreword I 1 range 1 2 Normative references 1 3 Terms and Definitions 1 4 Category 3 5 mark 4 6 Ordering Content 5 7 Material 5 8 Technical requirements 6 9 inspection 16 10 Test 17 11 Acceptance method 19 12 Packaging, Marking and Quality Certificate 20 13 Wire rope safety use and maintenance 20 Appendix A (Normative Appendix) Minimum breaking force table for wire rope type, diameter and class 21 Foreword This standard was drafted in accordance with the rules given in GB/T 1.1-2009. This standard replaces GB/T 20118-2006 "General Purpose Wire Rope". Compared with GB/T 20118-2006, the main changes are as follows. ---Change the standard name; ---Adjusted the diameter range of part of the wire rope structure; --- Added wire rope terminology and definition requirements and definitions of key terms; --- Added steel wire ropes of 11 structural categories; --- Table 4 increased the tensile strength of 1370, 1470 rope wire, Table 5 canceled 1670, 1870 two wire rope grade; --- Increased composite core (CC) and solid polymer core (SPC) and technical requirements; --- Removed the requirement for the lay length of the wire rope and the strand; ---Modified the minimum distance requirement between wire rope joints; --- Technical requirements for wire rope manufacturing have added wire rope structure and wire rope grade technical requirements; --- Increased technical requirements for allowable deviation and out-of-round tolerance of profiled strands and single strands; --- Table 8 added the reference weight coefficient and minimum breaking force coefficient of 11 wire rope categories, adding 4 wire rope categories The minimum breaking force coefficient of the metal core wire rope; --- Expanded steel wire nominal diameter range of 0.15mm ≤ d < 4.80mm; --- Revised the calculation data of the number of low-value steel wires in Table 13, and deleted the low-value steel wire number requirement of 100% test in Table 13, and gave The calculation method for the number of low-value steel wires of other structural steel wire ropes not included in the table; --- Modified the minimum graduation value of the vernier caliper; --- Increased requirements for wire rope core, oil coating, structure, surface quality inspection items; --- Added the method of calculating the measured breaking force; --- Increased safety, use and maintenance requirements for wire ropes; --- Adjusted part of the wire rope structure wire rope grade. This standard uses the redrafting method to refer to ISO 2408.2017 "wire rope requirements", and the consistency process with ISO 2408.2017 Degree is not equivalent. This standard was proposed by the China Iron and Steel Association. This standard is under the jurisdiction of the National Steel Standardization Technical Committee (SAC/TC183). This standard was drafted. Guizhou Steel Rope Co., Ltd., Jiangsu Yuyu Metal Products Co., Ltd., Metallurgical Industry Information Standards Institute, Jiangsu Saifu Tiangang Cable Co., Ltd., Jiangsu Shenwang Group Steel Cable Co., Ltd., Jianfeng Rigging Co., Ltd., Nantong Songcheng Industrial Co., Ltd. the company. The main drafters of this standard. Huang Zhongqu, Wang Xiaogang, He Xiaoyu, Ren Cuiying, Wang Lingjun, Xue Jianjun, Yang Yuemin, Li Lunyou, Huang Wei, Lin Zhuying, Wang Xiaozhu, Huang Jianming, Yu Shaohong, Cui Zhiqiang, Cai Hong, Cheng Wei. The previous versions of the standards replaced by this standard are. ---GB/T 1102-1974; ---GB/T 8918-1988, GB/T 8918-1996; ---GB/T 20118-2006. General technical conditions for wire rope 1 Scope This standard specifies the terms and definitions, classification, marking, ordering content, materials, technical requirements, inspection of steel wire ropes with a diameter of not more than 60mm. Inspection, testing, acceptance methods, packaging, marking and quality certificates, wire rope safety, use and maintenance. This standard applies to the general technical conditions of various structural steel wire ropes made of smooth and coated carbon steel wire. 2 Normative references The following documents are indispensable for the application of this document. For dated references, only dated versions apply to this article. Pieces. For undated references, the latest edition (including all amendments) applies to this document. GB/T 228.1 tensile testing of metallic materials - Part 1 GB/T 238 metal material wire repeated bending test method GB/T 239.1 Metallic materials and wires - Part 1 GB/T 1839 steel product galvanized layer quality test method General provisions for GB/T 2104 wire rope packaging, marking and quality certificates GB/T 8358 wire rope actual breaking tensile force determination method GB/T 8706 wire rope terminology, marking and classification GB/T 21965 wire rope acceptance and defect terminology GB/T 29086 wire rope safety use and maintenance Numerical correction of YB/T 081 metallurgical technical standard and determination of test data YB/T 4452 steel wire rope core YB/T 5343 round wire for rope making NB/SH/T 0387 Grease for wire rope 3 Terms and definitions The following terms and definitions as defined in GB/T 8706 apply to this document. 3.1 Wire rope ropelaylength The outer steel wire of the single-strand steel wire rope, the outer strand of the multi-strand steel wire rope rotates around the axis of the steel wire rope (or a spiral) and is parallel to the steel The distance between the two points of the axis of the wire (see Figure 1). Description. ( ). the number of the stock Figure 1 捻 distance (in the case of 6 strands of wire rope) 3.2 Wire rope's direction to directiondirectionrope The outer steel wire is in the single twisted steel wire rope or the outer strand is in the twisting direction of the wire rope axis in the multi-strand steel wire rope, ie right 捻 (Z) or left 捻 (S) (see Figure 2). Figure 2 The direction of the strands in the wire rope 3.3 Twisting type and direction of wire rope directionandtypeoflay 3.3.1 Interactive 捻(sZ zS) ordinarylay The twist of the wire rope is opposite to the twist of the outer strand. It is divided into right interaction 捻 (sZ) and left interaction 捻 (zS) (see Figure 3). Note. The first lowercase letter indicates the direction of the strand, and the second capital letter indicates the twist of the wire rope. Figure 3 Interaction捻 3.3.2 同向捻(zZ sS)langlay The twist of the wire rope is the same as the twist of the outer strand. It is divided into right-same 捻 (zZ) and left-same 捻 (sS) (see Figure 4). Note. The first lowercase letter indicates the direction of the strand, and the second capital letter indicates the twist of the wire rope. Figure 4 4 classification Wire ropes are classified according to the system given in GB/T 8706. Single-layer strand wire ropes (ie single-layer round strands and shaped strands) are shown in Table 1. The round wire rope is shown in Table 2, and the single wire rope is shown in Table 3. Table 1 Single-layer strand wire rope Category (without cord) Steel wire outer layer Number of strands, number of outer strands, number of strands, number of outer wires, number of outer wires, number of strands of steel wire, number of strands 4×19 4×36 15~26 29~57 7~12 12~18 2~3 3~4 Parallel Parallel 6×7 6×12 6×15 6×19 6×24 6×36 5~9 15~26 29~57 4~8 7~12 12~16 12~18 2~3 2~3 3~4 Single Single Single Parallel Parallel Parallel 6×19M 6×24M 6×37M 6×61M 8×19M 8×37M 12~19 27~37 45~61 12~19 27~37 9~12 12~16 16~18 18~24 9~12 16~18 Multi-process point contact Multi-process point contact Multi-process point contact Multi-process point contact Multi-process point contact Multi-process point contact 8×7 8×19 8×36 5~9 15~26 29~57 4~8 7~12 12~18 2~3 3~4 Single Parallel Parallel Shaped strand wire rope 6×V7 6×V19 6×V37 6×V8 6×V25 4×V39 7~9 21~24 27~33 8~9 15~31 39~48 7~9 10~14 15~18 8~9 9~18 15~18 Single Multi-process point contact/parallel 捻 Multi-process point contact/parallel 捻 Single Parallel Multi-process composite Note 1. For 6×V8 and 6×V25 triangular strands, the core of the strand is an independent triangular core, and all the strands are recorded as one. When using 1×7-3, When a 3×2-3 or 6/core core is used, the number of strands of the core wire is calculated into the wire strand structure. Note 2. The 6×29F structural steel wire rope is classified into 6×36 types. Table 2 Rotating round strand wire rope category Steel wire outer layer Number of shares (except core) Number of outer strands, number of strands, number of outer strands, number of outer strands, number of strands of steel wire, number of strands 2 times 23×7 18×7 18×19 18×19M 35(W)×7 35(W)×19 21~27 17~18 17~18 17~18 27~40 27~40 15~18 10~12 10~12 10~12 15~18 15~18 5~9 5~9 15~26 12~19 5~9 15~26 4~8 4~8 7~12 9~12 4~8 7~12 2~3 2~3 Single Single Parallel Multi-process point contact Single Parallel 3 times 34(M)×7 34~36 17~18 3 5~9 4~8 1 Single Note. The 4-strand wire rope can also be designed to resist rotating wire rope. Table 3 Single strand wire rope Category wire number outer wire number wire layer 1×7 5~9 4~8 1 1×19 17~37 11~16 2~3 1×37 34~59 17~22 3~4 1×61 57~85 23~28 4~5 5 mark The marking of the wire rope is in accordance with the provisions of GB/T 8706; the structural arrangement of the strands is marked from the center to the outer layer. An example of a wire rope marker is shown in Figure 5. Figure 5 Example of wire rope marking 6 Ordering content The contract for wire rope ordering according to this standard shall include the following main contents. a) the number of this standard; b) product name; c) structure (marker code); d) nominal diameter; e) wire rope level; f) the type of rope core; g) direction and type of tanning; h) surface state (glossy or plating); i) quantity (length, number of rolls, weight); j) Lubrication requirements (corrosion of ropes, strands and greases); k) use; l) Other specific requirements. 7 materials 7.1 Wire for rope making 7.1.1 The technical requirements for steel wire before rope making (including central steel wire, filled steel wire and core wire) shall comply with the general purpose steel in YB/T 5343. Silk regulations. The surface condition and nominal tensile strength of the steel wire shall comply with the requirements of Table 4. Table 4 Wire surface state and nominal tensile strength Surface state nominal tensile strength/(N/mm2) Smooth and Class B coatings 1370, 1470 1570, 1670 1770, 1870 1960 2160 AB grade plating 1370, 1470 1570, 1670 1770, 1870 1960 2160 Class A plating 1370, 1470 1570, 1670 1770, 1870 1960 - 7.1.2 The tensile strength level of the steel wire for the rope before the tensile strength of the wire rope shall comply with the requirements of Table 5. But the same wire layer All steel wires of the same diameter should have the same tensile strength grade and plating grade. Table 5 Tensile strength grade of wire rope for wire rope grade Wire rope grade steel wire nominal tensile strength range/(N/mm2) 1570 1370~1770 1770 1570~1960 1960 1770~2160 2160 1960~2160 Note. The minimum breaking force value of the wire rope is calculated based on the tensile strength level of the wire rope grade rather than the single steel wire. 7.2 core (C) The core of the wire rope is usually a fiber core or a steel core, but other types of cores such as a hybrid core and a solid polymer core may also be used. should be One of the following types. 7.2.1 Fiber core (FC) Made from natural fiber (NFC) sisal and jute or synthetic fiber (SFC) and other fibers that meet the requirements. Unless otherwise requested by the purchaser, The fiber core should be coated with anti-corrosion, anti-rust and grease, except for the oil-free wire rope core. Fiber rope cores with a diameter greater than or equal to 8 mm of single-strand steel wire rope shall be twisted at least twice (ie made of fibres, then by strands) Made of rope). 7.2.2 Steel core (WC) A core consisting of a separate wire rope (IWRC) or wire strand (WSC). Note 1. The outer core of the steel core can also be coated with fibers and solid polymers. Note 2. Single-layer multi-strand wire rope cores with a diameter greater than 12 mm are usually independent wire ropes, unless otherwise required by the purchaser. 7.2.3 Composite core (CC) A steel cord core made of steel and fiber or steel and solid polymer composite. 7.2.4 Solid Polymer Core (SPC) A core made of a circular or grooved circular solid polymer material may also contain steel wires or fibers inside. 7.2.5 Other requirements The buyer can specify other types of cores. 7.3 Wire rope grease Grease for wire ropes shall comply with NB/SH/T 0387 or other relevant technical requirements. 8 Technical requirements 8.1 Shareholding system 8.1.1 The steel wire in the strand should be even and tight. There should be no manufacturing defects in the GB/T 21965 standard. 8.1.2 For the strands made of steel wire of the same nominal diameter, the center wire of the strands shall be appropriately enlarged. There should be more uniform between adjacent wires in the same strand The gap. 8.2 Twisting of wire rope 8.2.1 The wire rope shall be twisted evenly, tightly and not loosely (except for the rotating wire rope). In the unfolded and unloaded condition, the wire rope should not It is wavy. There should be no staggering, bending and broken wire in the wire rope, and there should be no defects such as sturdy strands, but it is allowed to be processed by the process. The slight deformation of the steel wire caused by the compression of the preparation and deformation of the clamps exists. 8.2.2 There should be no significant difference in the distance between the same wire ropes. 8.2.3 When the steel wire rope is manufactured, the same diameter steel wire of the same layer shall be the same tensile strength of the same steel wire, and different diameter steel wires shall be allowed to adopt the phase. Same or meet the requirements of the range of tensile strength of steel wire specified in Table 5, but the minimum breaking force of the wire rope and the minimum breaking force of the steel wire shall be ensured. The sum meets the requirements of Tables A.1 to A.32. 8.2.4 The core size of the wire rope shall have sufficient supporting effect to make the outer strands of the outer wrap evenly. Between adjacent foreign shares There is a more even gap. 8.3 wire joint The joints of the steel wire in the wire rope should be minimized. Wires larger than 0.40 mm in diameter are applied to butt welds with diameters less than and equal to The 0.4 mm steel wire is connected by butt welding or by plugging and screwing. For multi-strand wire ropes, the minimum distance between the wire joints per share must not be less 18 times the diameter of the wire rope. For a single strand of wire rope, the minimum distance between any wire layer joint shall not be less than the diameter of the wire rope 36 times. 8.4 Oiling of wire rope At least all stocks should be oiled unless otherwise requested by the purchaser. The wire rope should be evenly coated with rust and grease. Its surface should not There are places where no grease is applied. 8.5 Surface quality of wire rope There should be no manufacturing defects in GB/T 21965 on the surface of the wire rope. 8.6 Wire rope structure The wire rope structure may be one of the structures in Tables A.1 to A.32, or other structural wire ropes specified by the manufacturer. At the buyer Where only the wire rope category is specified, the wire rope structure shall be determined by the manufacturer as required. Usually the buyer should specify the structure of the wire rope or category. 8.7 Wire rope grade 8.7.1 Wire rope grade is the level of breaking force of the wire rope expressed by numerical value. Such as. 1770. 8.7.2 The wire rope grade shall comply with the requirements of Tables A.1 to A.32. Wire ropes that meet the requirements can also be provided by the buyer in consultation with the manufacturer. 8.8 Wire surface condition For steel wire ropes made of coated steel wire, Class A, Class AB and Class B steel wires can be used, but the same diameter of steel wire plating in the same layer should be the same. The steel wire in the coated steel wire rope shall all have a plating layer, including a steel wire of a metal steel core. The plating level of the wire rope is from the outer strand The outer steel wire coating level is determined. 8.9 Wire rope method The multi-strand wire rope shall be one of a)~d), and the single-strand wire rope shall be one of e)~f). The method of wire rope shall be determined by the purchaser. a) right interaction 捻 (sZ); b) left interaction 捻 (zS); c) right same direction (zZ); d) left-handed 捻 (sS); e) right (Z); f) Left (S). The profiled strands should be in the same direction (4×V39 category should be interactive). The inner layer of the wire rope that resists the rotation category is determined by the supplier. set. 4×19, 4×36, 6×24M, 6×37M, 6×61M, 6×12, 6×15, 6×24, 8×37M, etc. should be interactive. 8.10 nominal diameter The nominal diameter is the nominal diameter of the wire rope and should be determined by the supplier and the buyer at the time of signing the contract. 8.10.1 measured diameter The measured diameter of the wire rope is the diameter measured by the method specified in 9.1.1. 8.10.2 Diameter tolerance and out-of-roundness The diameter and out-of-roundness of the wire rope shall comply with the requirements of Table 6. Table 6 Wire rope diameter tolerance and out-of-roundness Wire rope Types of Wire rope Nominal diameter D/ Mm Allowable deviation /% Out of roundness is not greater than /%D Steel core or fiber core Wire rope Strand with fiber core Wire rope Steel core or fiber core Wire rope Strand with fiber core Wire rope Round wire rope 0.6≤D< 4 - 7 - 4≤D< 6 6≤D< 8 D≥8 Shaped strand wire rope D≥18 Single strand wire rope D≥0.6 - 3 - 8.11 Length and its allowable deviation Wire ropes shall be supplied in accordance with the order length, expressed in m, and shall comply with the requirements of Table 7. Table 7 The length tolerance unit is m Length L0 allows deviation L0≤400 0~ 5%L0 400 \u003cL0≤1000 0~ 20 L0 >1000 0~ 2%L0 8.12 Reference weight The reference weight of the wire rope is expressed in kg/100m and is calculated according to formula (1). M = WD2 (1) In the formula. M --- the reference weight per unit length of the wire rope, in kilograms per 100 meters (kg/100m); D --- the nominal diameter of the wire rope, in millimeters (mm); W --- wire rope unoiled a certain structural category wire rope nominal length reference weight coefficient, the unit is kilograms per 100 square meters Meter [kg/(100m·mm2)], K value is shown in the coefficient given in Table 8; W1--- is the reference weight coefficient per unit length of the fiber rope wire rope; W2--- is the reference weight coefficient per unit length of the independent steel cord core (IWRC) steel cord; W3--- is the reference weight coefficient per unit length of the wire core (WSC) wire rope. Table 8 Wire rope reference weight coefficient and minimum breaking force coefficient Wire rope type wire rope category Natural fiber core wire rope steel core wire rope Weight coefficient W1 Minimum breaking force coefficient K1 Minimum breaking coefficient of tensile coefficient W2 W3 K2 K3 Single layer wire rope 6×7 0.351 0.332 0.387 0.396 0.359 0.388 6×12 0.251 0.209 6×15 0.200 0.180 6×19 0.380 0.330 0.418 0.356 6×24 0.331 0.291 6×36 0.380 0.330 0.418 0.356 6×19M 0.351 0.307 0.400 0.381 0.332 0.362 6×24M 0.318 0.280 6×37M 0.346 0.295 0.400 0.381 0.319 0.346 6×61M 0.361 0.283 0.398 0.306 8×19M 8×37M 0.356 0.261 0.420 0.310 8×7 0.327 0.291 0.391 0.464 0.359 0.404 8×19 0.357 0.293 0.435 0.346 8×36 0.357 0.293 0.435 0.346 4×19 4×36 0.410 0.360 Shaped stock Wire rope 6×V7 0.412 0375 0.437 0.398 6×V19 6×V37 0.405 0.360 0.429 0.382 6×V8 0.410 0.362 6×V25 0.410 0.351 4×V39 0.410 0.360 Resistance rotation Wire rope 23×7 0.470 0.360 18×7 18×19 0.390 0.310 0.430 0.328 35(W)×7 35(W)×19 0.460 0.360a 0.350b 34(M)×7 0.400 0.308 0.430 0.318 Single stock Wire rope 1×7 0.522 0.540 1×19 0.507 0.530 1×37 0.501 0.512 1×61 0.487 0.510 Table 8 (continued) Wire rope type wire rope category Natural fiber core wire rope steel core wire rope Weight coefficient W1 Minimum breaking force coefficient K1 Minimum breaking coefficient of tensile coefficient W2 W3 K2 K3 The weight coefficient and minimum breaking force coefficient of 6×V21FC and 6×V24FC structural steel ropes should be 8% smaller than the data in the table. 6×V30 The minimum breaking force coefficient of the structural steel wire rope should be 10% smaller than the data in the table. Weight coefficient and minimum breaking force of 6×V37S structural steel wire rope The number should be 3% larger than the data in the table. The wire length per unit length of the synthetic fiber core is 2.5% smaller than the data for W1 listed in the table. Composite core and solid polymer core steel wire rope minimum breaking tensile coefficient K1 is the same as natural fiber core wire rope, weight coefficient than natural fiber core wire rope The data is 3.5% larger. Note. The weight factor is for reference only. a Less than or equal to the 1960 grade wire rope. b A wire rope greater than 1960 grade but less than or equal to 2160 grade wire rope. 8.13 Broken wire tension The measured value of the breaking force of the wire rope shall not be lower than the values specified in Table A.1 to Table A.32 or the agreement between the supplier and the buyer. Wire rope minimum Broken tensile force, expressed in kN, and calculated according to equation (2). F0=KD2R0/1000 (2) In the formula. F0---The minimum breaking force of the wire rope, the unit is kN (kN); D --- is the nominal diameter of the wire rope, in millimeters (mm); R0--- is the wire rope grade; K --- is the minimum breaking force coefficient of a given type of wire rope, K value is shown in Table 8; K1--- is the minimum breaking force coefficient of the fiber rope wire rope; K2--- is the minimum breaking tensile wire rope coefficient of the independent steel cord core; K3---The minimum breaking force coefficient of the steel wire rope with the steel wire strand as the rope core. 8.14 Requirements for the wire removal 8.14.1 Measured diameter The measured diameter of the wire shall comply with the relevant provisions of YB/T 5343. Allows no more than 3% of the measured wire to exceed YB/T 5343 The regulations are, but cannot exceed 50% of the allowable deviation of the regulation. The measured diameter of the stranded wire rope split wire is not evaluated. The manufacturer shall provide the customer with the nominal diameter and nominal tensile strength of the steel wire rope. 8.14.2 Tensile strength The measured tensile strength of the stranded wire rope split wire shall not be lower than that specified in Table A of Table 9. Shaped strand wire rope split wire The strength value should not be lower than the provisions in column B of Table 9. 8.14.3 Twisting of steel wire The minimum number of twists of round wire rope wire shall comply with the requirements of Table 10. The minimum number of twists of the profiled strand wire rope is allowed in Table 10 is reduced by 1 time. Table 9 Allowable values of tensile strength Nominal tensile strength/(N/mm2) 1370 1570 1770 1960 2160 Minimum tensile Strength/(N/mm2) A 1320 1520 1720 1910 2110 B - 1492 1682 1862 - C - 1413 1593 1764 - Note. When using other nominal tensile strength, the column tension is 50N/mm2 for the nominal tensile strength, and the column column is 5% for the nominal tensile strength. The nominal tensile strength is reduced by 10% (repaired into an integer). 8.14.4 Bending of steel wire The minimum number of bends of the wire shall comply with the requirements of Table 11. 8.14.5 Stretching and stretching of steel wire For steel wires with a diameter less than 0.50 mm, the torsion and repeated bending tests are replaced by a steel wire knot tensile test. 9... ......

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