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GB/T 33974-2017 English PDF

GB/T 33974-2017 (GB/T33974-2017, GBT 33974-2017, GBT33974-2017)
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GB/T 33974-2017English115 Add to Cart 0--9 seconds. Auto-delivery Hot rolling checker steel sheet and strip Valid GB/T 33974-2017
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BASIC DATA
Standard ID GB/T 33974-2017 (GB/T33974-2017)
Description (Translated English) Hot rolling checker steel sheet and strip
Sector / Industry National Standard (Recommended)
Classification of Chinese Standard H46
Classification of International Standard 77.140.50
Word Count Estimation 10,163
Date of Issue 2017-07-12
Date of Implementation 2018-04-01
Drafting Organization Bengang Group Co., Ltd., Metallurgical Industry Information Standards Institute, Anshan Iron and Steel Co., Ltd.
Administrative Organization National Steel Standardization Technical Committee (SAC / TC 183)
Proposing organization China Iron and Steel Industry Association
Issuing agency(ies) General Administration of Quality Supervision, Inspection and Quarantine of the People Republic of China, China National Standardization Administration Committee


GB/T 33974-2017 GB NATIONAL STANDARD OF THE PEOPLE’S REPUBLIC OF CHINA ICS 77.140.50 H 46 Hot rolling checker steel sheet and strip ISSUED ON. JULY 12, 2017 IMPLEMENTED ON. APRIL 01, 2018 Issued by. General Administration of Quality Supervision, Inspection and Quarantine; Standardization Administration of the People's Republic of China. Table of Contents Foreword ... 3  1 Scope ... 4  2 Normative references ... 4  3 Classification and code ... 5  4 Order contents ... 5  5 Dimension, shape, weight ... 6  6 Technical requirements ... 10  7 Test methods ... 11  8 Inspection rules ... 11  9 Packaging, marking and quality certificates ... 12  Appendix A (Informative) Theoretical weighing method for hot rolling checker steel sheet ... 13  Hot rolling checker steel sheet and strip 1 Scope This standard specifies the classification and code number, order content, dimensions, shape, weight, technical requirements, test methods, inspection rules, packaging, markings and quality certificates for hot rolling checker steel sheet and strip. This standard applies to diamond-shaped, lentil-shaped, round bean-shaped and combination-shaped hot rolling checker steel sheet and strip (hereinafter referred to as steel sheet and strips) having a thickness of 1.4 mm ~ 16.0 mm. 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 standard. GB/T 222 Permissible tolerances for chemical composition of steel products GB/T 228.1 Metallic materials - Tensile testing - Part 1. Method of test at room temperature GB/T 232 Metallic materials - Bend test GB/T 247 General rule of package mark and certification for steel sheets (sheets) and strips GB/T 700 Carbon structural steels GB/T 709 Dimensions, shape, weight and tolerances for hot rolled steel sheets and strips GB/T 712 Structural steel for ship and marine engineering GB/T 1591 High strength low alloy structural steels GB/T 2975 Steel and steel products - Location and preparation of test pieces for mechanical testing GB/T 4171 Atmospheric corrosion resisting structural steel GB/T 8170 Rules of rounding off for numerical values & expression and judgement of limiting values GB/T 17505 Steel and steel products General technical delivery requirements GB/T 20066 Steel and iron - Sampling and preparation of samples for the determination of chemical composition 3 Classification and code 3.1 Classification by edge status is as follows. a) Trimming, EC; b) Not trimming, EM. 3.2 Classification by shape of the pattern is as follows. a) Diamond, LX; b) Lentil-shape, BD; c) Round bean shape, YD; d) Combined shape, ZH. 4 Order contents 4.1 Contracts or orders placed under this standard shall include the following. a) This standard number; b) Grade; c) Product category (steel sheet or strip); d) Specifications; e) Pattern shape; f) Edge status; g) Other requirements. 4.2 Marking example The untrimmed lentil-shaped pattern steel sheet which is delivered in Table 3 -- Steel sheet flatness, in millimeters Thickness Flatness, not more than Measured length 1.4 ~ 2.5 15 1000 > 2.5 ~ 4.0 12 > 4.0 ~ 16.0 10 5.5 Other sizes and shapes of steel sheets and strips are to comply with the requirements of GB/T 709. 5.6 Steel sheets and strips are delivered by actual weight. In accordance with the requirements of the purchaser, the steel sheet can refer to Appendix A and be delivered by theoretical weight. 6 Technical requirements 6.1 Grades and chemical composition 6.1.1 The steel grade and chemical composition (smelting analysis) shall comply with the provisions of GB/T 700, GB/T 712, GB/T 1591, and GB/T 4171. With the agreement of the supplier and purchaser, it can supply other grades of steel sheets and strips. 6.1.2 The allowable deviation of the chemical composition of finished steel sheets and strips shall comply with the provisions of GB/T 222. 6.2 Delivery status 6.2.1 Steel sheets and strips are delivered in hot rolling condition. 6.2.2 Steel sheets and strips are usually supplied in an untrimmed state, or otherwise supplied in a trimmed state as specified by the purchaser and specified in the contract. 6.3 Mechanical properties According to the requirements of the purchaser, and specified in the contract, tensile and bending tests can be performed. The performance indicators shall meet the requirements of GB/T 700, GB/T 712, GB/T 1591, and GB/T 4171 or the agreement between the both parties. 6.4 Surface quality 6.4.1 The surface of steel sheets and strips shall be free of bubbles, scars, cracks, folds, and inclusions. There shall be no delamination of steel sheets and strips. 6.4.2 The surface of steel sheets and strips is allowed to have a thin layer of ......