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GB/T 34560.3-2018: Structural steels -- Part 3: Technical delivery conditions for fine grain structural steels Delivery: 9 seconds. True-PDF full-copy in English & invoice will be downloaded + auto-delivered via email. See step-by-step procedure Status: Valid
Similar standardsGB/T 34560.3-2018: Structural steels -- Part 3: Technical delivery conditions for fine grain structural steels---This is an excerpt. Full copy of true-PDF in English version (including equations, symbols, images, flow-chart, tables, and figures etc.), auto-downloaded/delivered in 9 seconds, can be purchased online: https://www.ChineseStandard.net/PDF.aspx/GBT34560.3-2018 GB NATIONAL STANDARD OF THE PEOPLE’S REPUBLIC OF CHINA ICS 77.140.01 H 40 Structural steels - Part 3. Technical delivery conditions for fine grain structural steels (ISO 630-3.2012, MOD) Issued on: MAY 14, 2017 Implemented on: FEBRUARY 01, 2019 Issued by. State Administration for Market Regulation; Standardization Administration of the People's Republic of China. Table of ContentsForeword ... 3 1 Scope ... 5 2 Normative references ... 5 3 Terms and definitions ... 8 4 Grade representation method ... 8 5 Ordering content ... 8 6 Dimension, shape, weight ... 9 7 Technical requirements ... 9 8 Test methods ... 19 9 Inspection rules ... 20 10 Packaging, marking and quality certificate ... 21 Annex A (informative) Structural changes in this Part compared with ISO 630- 3.2012 ... 22 Annex B (informative) Technical differences between this Part and ISO 630- 3.2012 and their causes ... 23 Annex C (informative) Comparison of grades of the same type of domestic and foreign standards ... 26 Structural steels - Part 3. Technical delivery conditions for fine grain structural steels1 ScopeThis Part of GB/T 34560 specifies the terms and definitions, grade representation method, ordering content, dimension, shape, weight and permissible deviation, technical requirements, test methods, inspection rules, packaging, marking and quality certificate of weldable fine grain structural steels delivered in normalizing, normalizing rolling and thermo-mechanical rolling status. This Part is applicable to steel plates and steel strips, wide flat steel, section steels and bars for welded or bolted heavy loads (hereinafter referred to as steel).2 Normative referencesThe 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 222 Permissible tolerances for chemical composition of steel products GB/T 223.3 Methods for chemical analysis of iron, steel and alloy - The diantipyryl methane phosphomolybdate gravimetric method for the determination of phosphorus content GB/T 223.9 Iron, steel and alloy - Determination of aluminium content - Chrom azurol S photometric method GB/T 223.11 Iron, steel and alloy - Determination of chromium content - Visual titration or potentiometric titration method (GB/T 223.11-2008, ISO 4937.1986, MOD) GB/T 223.14 Methods for chemical analysis of iron, steel and alloy - The N- benzoy-N-phenylhydroxylamine extraction photometric method for the determination of vanadium content GB/T 223.17 Methods for chemical analysis of iron, steel and alloy - The GB/T 223.84 Steel and iron - Determination of titanium content - Dinantipyrylmethane spectrophotometric method (GB/T 223.84-2009, ISO 10280.1991, IDT) GB/T 228.1 Metallic materials - Tensile testing - Part 1. Method of test at room temperature (GB/T 228.1-2010, ISO 6892-1.2009, MOD) GB/T 229 Metallic materials - Charpy pendulum impact test method (GB/T 229-2007, ISO 148-1.2006, MOD) GB/T 247 General rule of package, mark and certification for steel plates (sheets) and strips GB/T 2101 General requirement of acceptance, packaging, marking and certification for section steel GB/T 2975-2008 Steel and steel products - Location and preparation of test pieces for mechanical testing (GB/T 2975-2018, ISO 377.2017, MOD) GB/T 4336 Carbon and low-alloy steel - Determination of multi-element contents - Spark discharge atomic emission spectrometric method (routine method) GB/T 5313 Steel plates with through-thickness characteristics GB/T 8170 Rules of rounding off for numerical values & expression and judgement of limiting values GB/T 20066 Steel and iron - Sampling and preparation of samples for the determination of chemical composition (GB/T 20066-2006, ISO 14284.1996, IDT) 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 20123-2006, ISO 15350.2000, IDT) GB/T 20124 Steel and iron - Determination of nitrogen content - Thermal conductimetric method after fusion in a current of inert gas (Routine method) (GB/T 20124-2006, ISO 15351.1999, IDT) GB/T 20125 Low-alloy steel - Determination of multi-element contents - Inductively coupled plasma atomic emission spectrometric method GB/T 34560.1 Structural steels - Part 1. General technical delivery condition for hot-rolled products (GB/T 34560.1-2017, ISO 630-1.2011, MOD) e) delivery weight (quantity); f) all required selected contents (see 5.2). 5.2 Agreed upon between the supply and demand parties and indicate in the contract, the following may be selected as the ordering content of this Part. If the demand party does not specify when providing the inquiry and ordering, the product shall be supplied in accordance with 5.1. a) calculation formula for carbon equivalent or weld crack sensitivity index (Pcm) (see 7.1.2, Table 4); b) alloying elements added and their contents (see 7.1.4, Table 1, Table 3); c) lower limit of chemical composition when supplying commodity steel billets (see 7.1.6); d) analysis of finished products (see 7.1.7); e) smelting method (see 7.2); f) impact test temperature and impact test sampling direction (see Table 7); g) through-thickness characteristic (see 7.1.5, 7.4.4 and 9.2.2); h) sampling position of impact specimen (see 8.3).6 Dimension, shape, weightThe dimension, shape, weight and permissible deviation of steel shall comply with the specifications of GB/T 34560.1.7 Technical requirements7.1 Grades and chemical composition of steel 7.1.1 The grades and chemical composition (smelting analysis) of normalized and normalized rolled steel shall comply with the specifications of Table 1 respectively, and the carbon equivalent value shall comply with the specifications of Table 2. 7.1.2 The grades and chemical compositions (smelting analysis) of thermo- mechanically rolled steel shall comply with the specifications of Table 3, and the carbon equivalent values shall comply with the specifications of Table 4. When the carbon content of the thermo-mechanically rolled steel is not more than 0.12 %, the weldability of steel may be evaluated by using the weld crack a) For section steels, it is in accordance with the specifications of Figure A.3 of GB/T 2975-2018; b) For round steels, when the nominal diameter d ≤ 25 mm, 25 mm < d ≤ 50 mm and d > 50 mm, it is respectively in accordance with the specifications of a), b), d) in Figure A.5 of GB/T 2975-2018; c) For square steels, when the side length is not greater than 50 mm, it is in accordance with the specifications of a) in Figure A.9 of GB/T 2975-2018; when the side length is greater than 50 mm, it is in accordance with the specifications of b) in Figure A.9 of GB/T 2975-2018; d) For steel plates, when the nominal thickness is not greater than 40 mm, it is in accordance with the specifications of a) in Figure A.11 of GB/T 2975- 2018; when the nominal thickness is greater than 40 mm, it is in accordance with the specifications of b) in Figure A.11 of GB/T 2975-2018.9 Inspection rules9.1 Inspection and acceptance The inspection and acceptance of steel shall be carried out by the technical supervision department of the supply party, and the demand party shall have the right to inspect and accept any of the inspection items specified in this Part or the contract. 9.2 Batching rules 9.2.1 The steel shall be submitted for acceptance in batches. Each batch shall consist of steel of the same grade, the same furnace number, the same specification and the same delivery status. The weight of each batch shall be not more than 60 t, but the steel strips and continuous rolling plats with a coil weight of more than 30 t may constitute a batch composed of two rolling coils. For steels with a volume greater than 200 t, the weight of each batch is not more than 80 t. Agreed upon between the supply and demand parties, it may inspection 2 batches per furnace. 9.2.2 For steel requiring through-thickness characteristic test, the batching rules shall comply with the specifications of GB/T 5313. 9.3 Sampling position and sampling quantity The sampling position and sampling quantity of each batch of steel are shown in Table 8. 9.4 Reinspection and determination rules ......Source: Above contents are excerpted from the full-copy PDF -- translated/reviewed by: www.ChineseStandard.net / Wayne Zheng et al. 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