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Q/BQB 517-2023 English PDF (QBQB517-2019, QBQB517-2018)

Q/BQB 517-2023_English: PDF (Q/BQB517-2023)
Standard IDContents [version]USDSTEP2[PDF] delivered inStandard Title (Description)StatusPDF
Q/BQB 517-2023English695 Add to Cart 0--9 seconds. Auto-delivery Wire rods for cold heading   Q/BQB 517-2023
Q/BQB 517-2019English205 Add to Cart 0--9 seconds. Auto-delivery Cold Heading Steel Wire Rod Q/BQB 517-2019
Q/BQB 517-2018English190 Add to Cart 0--9 seconds. Auto-delivery Steel wire rod for cold heading Obsolete Q/BQB 517-2018


BASIC DATA
Standard ID Q/BQB 517-2023 (Q/BQB517-2023)
Description (Translated English) Wire rods for cold heading
Sector / Industry Chinese Industry Standard
Classification of Chinese Standard QBQ
Word Count Estimation 21,250
Date of Issue 2023-04-09
Date of Implementation 2023-07-01

BASIC DATA
Standard ID Q/BQB 517-2019 (Q/BQB517-2019)
Description (Translated English) Cold Heading Steel Wire Rod
Sector / Industry Chinese Industry Standard
Classification of Chinese Standard QBQ
Word Count Estimation 9,968

BASIC DATA
Standard ID Q/BQB 517-2018 (Q/BQB517-2018)
Description (Translated English) Steel wire rod for cold heading
Sector / Industry Chinese Industry Standard
Classification of Chinese Standard QBQ
Word Count Estimation 9,913
Administrative Organization Baoshan Iron and Steel Co., Ltd.


Q/BQB 517-2023 BQB ENTERPRISE STANDARD OF BAOSHAN IRON AND STEEL CO., LTD Replacing Q/BQB 517-2019 Wire Rods for Cold Heading ISSUED ON: APRIL 9, 2023 IMPLEMENTED ON: JULY 1, 2023 Issued by: Baoshan Iron and Steel Co., Ltd. Table of Contents Foreword ... 3 1 Scope ... 5 2 Normative References ... 5 3 Terms and Definitions ... 6 4 Ordering Content ... 6 5 Size, Shape, Weight and Tolerance ... 7 6 Technical Requirements ... 7 7 Inspection and Test ... 9 8 Packaging, Marking and Inspection Documents ... 10 9 Numerical Rounding Rules ... 10 10 Appendix ... 10 Appendix A (Normative) Special Quality Requirements ... 19 Appendix B (Informative) Approximate Comparison of Designations in this Document and Relevant Standards ... 20 Wire Rods for Cold Heading 1 Scope This Document specifies the size, shape, weight and tolerance, technical requirements, inspection and testing, packaging, marking and inspection documents of wire rods for cold heading. This Document applies to hot-rolled wire rods for cold heading produced by Baoshan Iron and Steel Co., Ltd. It is mainly used for manufacturing high-grade cold-formed fasteners, special- shaped parts, etc. used in the automotive, electronics, machinery and other industries. 2 Normative References The provisions in following documents become the essential provisions of this Document through reference in 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) is applicable to this Document. GB/T 222 Permissible tolerances for chemical composition of steel products GB/T 223 Methods for chemical analysis of iron, steel and alloy GB/T 224-2019 Determination of the depth of decarburization of steels GB/T 228.1-2021 Metallic materials - Tensile testing - Part 1: Method of test at room temperature GB/T 230.1 Metallic materials - Rockwell hardness test - Part 1: Test method GB/T 2975 Steel and steel products - Location and preparation of samples and test pieces for mechanical testing GB/T 4336 Standard Test Method for Spark Discharge Atomic Emission Spectrometric Analysis of Carbon and Low-Alloy Steel (Routine Method) GB/T 6394 Metal - Methods for estimating the average grain size GB/T 8170 Rules of rounding off for numerical values & expression and judgement of limiting values GB/T 10561-2005 Steel - Determination of Content of Nonmetallic Inclusions - Micrographic Method Using Standards Diagrams GB/T 11261 Steel and Iron - Determination of oxygen content - The pulse heating inert gas fusion-infra-red absorption method GB/T 13298 Inspection methods of microstructure for metals GB/T 20066 Steel and Iron - Sampling and Preparation of Samples for the Determination of Chemical Composition GB/T 20123 Steel and iron - Determination of total carbon and sulfur content Infrared absorption method after combustion in an induction furnace (routine method) GB/T 20124 Steel and iron - Determination of nitrogen content - Thermal conductimetric method after fusion in a current of inert gas GB/T 20125 Low-alloy steel - Determination of multi-element contents - Inductively coupled plasma atomic emission spectrometric method GB/T 20126 Unalloyed steel - Determination of low carbon content - Part 2: Infrared absorption method after combustion in an induction furnace (with preheating) YB/T 5293 Metallic materials - Forging test Q/BQB 500 General requirements of packaging - marking and inspection document for wire rods Q/BQB 501 Dimension, shape, mass and tolerance for wire rods 3 Terms and Definitions For the purposes of this Document, there are no terms and definitions apply. 4 Ordering Content The contract or order for wire rod ordered according to this Document shall include the following contents: a) This enterprise’s standard number; b) Designation (see Tables 1 and 2); c) Specifications and dimensional accuracy level; d) Weight and coil weight grouping category (i.e. I, II or III, see Q/BQB 501. If not specified, follow the coil weight requirements of Group I); supplier. 6.3 Delivery status Wire rod is delivered in hot-rolled condition. 6.4 Cold heading Wire rods shall be subjected to cold heading tests. There shall be no cracks in the cold heading test. According to the ratio of the height of the sample after cold heading to that before cold heading, the cold heading performance of wire rod is divided into: high-level...1/4; higher level...1/3; ordinary level...1/2. For the designations corresponding to the serial numbers 1 ~ 33 in Table 1 and the designations corresponding to the serial numbers 1 ~ 12 in Table 2, the wire rods shall meet the higher-level cold heading requirements; and other designations of wire rods shall meet the ordinary-level cold heading requirements. When advanced-level cold heading performance is required, the specimen must be spheroidized first. 6.5 Decarburization layer For designations corresponding to serial numbers 34 ~ 104 in Table 1, the wire rod shall be inspected for decarburized layer according to the metallographic most severe field method specified in GB/T 224-2019. The depth of total decarburized layer (ferrite + transition layer) on one side of the wire rod shall be no greater than 1.0% of the nominal diameter of the wire rod. For the designations corresponding to serial numbers 13 ~ 34 in Table 2, the wire rod shall be inspected for decarburized layer according to the metallographic most severe field method specified in GB/T 224-2019. The depth of total decarburized layer (ferrite + transition layer) on one side of the wire rod shall be no greater than 0.8% of the nominal diameter of the wire rod. 6.6 Non-metallic inclusions Wire rods shall be inspected for non-metallic inclusions. Non-metallic inclusions in wire rods shall be rated according to Method-A in GB/T 10561-2005. For the designations in Table 1, the qualification level shall comply with the provisions of Table 3; for the designations in Table 2, the qualification level shall comply with the provisions of Table 4. 6.7 Surface quality 6.7.1 The surface of the wire rod shall be smooth and shall not have cracks, folds, scars, ears and other defects that are harmful to use. Indentations and local bumps, pits, scratches, pits, and hair lines are allowed, but their depth or height (calculated from the actual size): for the designations in Table 1, it shall be no greater than 0.10 mm; for the designations in Table 2, it shall be no larger than 0.08 mm. According to the requirements of the purchaser, the special quality requirements specified in Appendix A.3 can also be met after negotiation between the supplier and the purchaser and noted in the contract (order code Z4). 6.7.2 Harmful defects at the head and tail of the wire rod shall be cut off, and the cross-section shall be free of shrinkage holes, delamination and inclusions. 6.7.3 The weight of the oxide scale on the surface of the wire rod shall not exceed 10 kg/t. If the supplier has guarantees in terms of workmanship, inspection can be exempted. 6.8 Other special requirements According to the requirements of the purchaser and upon agreement between the supplier and the purchaser, tensile properties (wire rods with specifications 18.0 mm below), hardness tests (wire rods with specifications of 18.0 mm and above), grain size, microstructure or other items can be inspected; the indicators are stipulated through the agreement between the supplier and the purchaser. 7 Inspection and Test 7.1 Inspection items, specimen quantity, sampling methods and locations, and test methods The inspection items, sample quantity, sampling methods and locations, and test methods for each batch of wire rods shall be implemented in accordance with the provisions of Table 5. If a tensile test is required, the tensile test shall be in accordance with Method-B in GB/T 228.1- 2021. In order to improve the reproducibility of the measurement results, it is recommended to use the beam displacement rate control method. The beam displacement rate for determining the yield strength is 0.00083 × Lc (mm/s) or 0.05 × Lc (mm/min); after the yield strength is measured, the beam displacement rate is 0.0067× Lc (mm/s) or 0.4× Lc (mm/min). 7.2 Inspection method of iron oxide scale Take one or several coils of wire rod specimen and weigh it. Remove iron oxide scale from the surface and weigh it again. The difference in weight before and after is the weight of the iron oxide scale of the specimen. The calculation formula for the weight of iron oxide scale per ton of wire rod is: ூ௥௢௡ ௢௫௜ௗ௘ ௦௖௔௟௘ ௪௘௜௚௛௧ ௢௙ ௦௣௘௖௜௠௘௡ ሺ௞௚ሻ ௦௣௘௖௜௠௘௡ ௪௘௜௚௛௧ ሺ௞௚ሻ × 1000 (kg/t) 7.3 Batching rules Wire rods shall be inspected in batches; and each batch consists of wire rods of the same designation, furnace number, and size. 7.4 Reinspection and judgment rules Appendix A (Normative) Special Quality Requirements A.1 Scope According to the requirements of the purchaser, the supplier shall adopt the requirements of A.2 and/or A.3 of this Appendix after negotiation between the supplier and the purchaser and being noted in the contract. A.2 Chemical composition (order code Z1) After negotiation between the supplier and the purchaser and being specified in the contract, the mass fraction requirements for P and S content in the smelting ingredients of some designations in Tables 1 and 2 shall be replaced by the following requirements: P: ≤0.015%, S: ≤0.015%. A.3 Surface quality (order code Z4) After negotiation between the supplier and the purchaser, and being noted in the contract, the requirements in Subclause 6.7.1 shall be replaced by the following requirements: The surface of the wire rod shall be smooth and shall be free of cracks, folds, scars, ears and other defects that are harmful to use. Indentations and local bumps, pits, scratches, pits, and hair lines are allowed, but their depth or height (calculated from the actual size): for the designations in Table 1, it shall be no greater than 0.07 mm; for the designation in Table 2, it shall be no larger than 0.05 mm. ......


Q/BQB 517-2019 BQB ENTERPRISE STANDARD OF BAOSHAN IRON AND STEEL CO., LTD Cold Heading Steel Wire Rod Issued by: Baoshan Iron and Steel Co., Ltd. Table of Contents 1 Chemical Compositions ... 3 2 Cold Upsetting Performance ... 9 3 Inspection and Testing ... 10 Main Technical Indicators and Test Methods (Public Statement) 1 Chemical Compositions Table 1 ......


Q/BQB 517-2018 BQB ENTERPRISE STANDARD OF BAOSHAN IRON AND STEEL CO., LTD Steel wire rod for cold heading Issued on. February 5, 2018 Issued by. Baoshan Iron and Steel Co., Ltd. Enterprise commitments The content of Q/BQB 518-2018, Steel wire rod for cold heading, which was drafted and issued by our corporation, complies with the requirements of relevant national laws and regulations, compulsory standards and relevant industrial policies. It was issued by the corporate representative in the procedures specified. The products of out corporation comply with all technical requirements of this Standard; a reference to this Standard is indicated on the products’ package. Our corporation is responsible for the authenticity, accuracy and legitimacy of the information declared and bears all legal liabilities for the consequences caused by the implementation of this Standard. Baoshan Iron and Steel Co., Ltd. February 5, 2018 Technical indexes 1 Names of indexes. the major technical indexes such as chemical compositions Index requirements. for the major technical indexes, such as chemical compositions, and their test methods, see annexes (see page 4 for detail). ......

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