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GB/T 5213-2019 PDF English

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GB/T 5213-2019: Cold rolled low carbon steel sheet and strip
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GB/T 5213: Evolution and historical versions

Standard IDContents [version]USDSTEP2[PDF] deliveryName of Chinese StandardStatus
GB/T 5213-2019English135 Add to Cart 0-9 seconds. Auto-delivery Cold rolled low carbon steel sheet and strip Valid
GB/T 5213-2008English85 Add to Cart 0-9 seconds. Auto-delivery [Replaced by GB/T 5213-2019] Cold rolled low carbon steel sheet and strip Obsolete
GB/T 5213-2001English439 Add to Cart 4 days Cold rolled sheets and strips for deep drawing Obsolete
GB/T 5213-1985English239 Add to Cart 2 days Cold rolled sheets and strips for deep drawing Obsolete

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GB/T 5213-2019: Cold rolled low carbon steel sheet and strip

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NATIONAL STANDARD OF THE PEOPLE’S REPUBLIC OF CHINA ICS 77.140.50 H 46 Replacing GB/T 5213-2008 Cold rolled low carbon steel sheet and strip Issued on. MARCH 25, 2019 Implemented on. FEBRUARY 1, 2020 Issued by. State Administration for Market Regulation; Standardization Administration of the People's Republic of China.

Table of Contents

Foreword... 3 1 Scope... 4 2 Normative references... 4 3 Classification and designation... 5 4 Ordering content... 7 5 Dimensions, shape and weight... 7 6 Technical requirements... 7 7 Test methods... 10 8 Inspection rules... 11 9 Packaging, marking and quality certification... 11 Annex A (Informative) Chemical components of steel... 12 Annex B (Informative) Cross-reference of similar domestic and foreign designations... 13

Foreword

This Standard was drafted in accordance with the rules given in GB/T 1.1-2009. This Standard replaces GB/T 5213-2008, Cold rolled low carbon steel sheet and strip. Compared with GB/T 5213-2008, in addition to editorial changes, the major technical changes are as follows. -- it changes the scope of application and the range of nominal thickness (see Clause 1; Clause 1 of 2008 edition); -- it changes the lower limit requirements for the tensile strength of designation DC06 (see Table 4; Table 4 of 2008 edition); -- in accordance with the divisions of different class intervals of nominal thickness, it adds the requirements for percentage elongation after fracture (see Table 4); -- it adds the requirements for the tensile strain mark surface quality assurance of the FC surface of designation DC01 (see Table 5); -- it adds the requirements for “surface quality”, “dimensions” and their corresponding test methods in the inspection items of Table 7 (see Table 7); -- it changes the requirements for the reference values of some chemical components in Annex A (see Annex A; Annex A of 2008 edition); -- it changes the cross-reference table of similar domestic and foreign designations in Annex B (see Annex A; Annex A of 2008 edition). This Standard was proposed by the China Iron and Steel Association. This Standard shall be under the jurisdiction of National Technical Committee 183 on Steels of Standardization Administration of China (SAC/TC 183). The drafting organizations of this Standard. Baoshan Iron and Steel Co., Ltd., China Metallurgical Information and Standardization Institute, Jiangsu Shagang Group Co., Ltd., Zhangjiagang Yangtze Cold Rolled Sheet Co., Ltd., Shandong Taishan Iron and Steel Group Co., Ltd., Guangxi Liuzhou Iron and Steel Group Co., Ltd. The main drafters of this Standard. Zhu Yan, Yuan Min, Li Qian, Li Ran, Nie Wenjin, Hu Yanhui, Huang Yanfei, Chen Hai, Tu Shulin, Zhang Weixu, Li Xiaobo, Zhao Qishao, Wu Yuhong, Deng Shen, Hu Ling, Huang Jinhua, Hou Jie, Xu Qing. The previous editions of the standard replaced by this Standard are as follows. -- GB/T 5213-1985, GB/T 5213-2001, GB/T 5213-2008. Cold rolled low carbon steel sheet and strip

1 Scope

This Standard specifies the terms and definitions, classification and designation, ordering content, dimensions, shape, weight, technical requirements, test methods, inspection rules, packaging, marking and quality certification of cold rolled low carbon steel plates (sheets) and strips.

2 Normative references

The following referenced documents are indispensable for the application of this document. For dated references, only the edition dated applies to this document. For undated references, the latest edition of the referenced documents (including all amendments) applies to this document. GB/T 223.9, Iron steel and alloy – Determination of aluminium content – Chrome azurol S photometric method GB/T 223.16, Methods for chemical analysis of iron, steel and alloy – The chromotropic acid photometric method for the determination of titanium content GB/T 223.40, Methods for chemical analysis of iron, steel and alloy – The anion- exchange separation-sulphochlorophenol S photometric method for the determination of niobium content GB/T 223.59, Iron, steel and alloy – Determination of phosphorus content – Bismuth phosphomolybdate blue spectrophotometric method and antimony phosphomolybdate blue spectrophotometric method GB/T 223.63, Methods for chemical analysis of iron, steel and alloy – The sodium (potassium) periodate photometric method for the determination of manganese content

3 Classification and designation

3.1 Classification 3.1.1 For the classification of steel plates (sheets) and strips by use see Table 1. 3.1.2 For the classification of steel plates (sheets) and strips by surface quality see Table 2. 3.1.3 For the classification of steel plates (sheets) and strips by surface structure see Table 3 3.2 Designation Designation of steel plates (sheets) and strips consists of three parts, including. the first part is letter “D”, representing steel plates (sheets) for cold forming; the second part is letter “C”, representing that it is cold rolling; the third part is a two-digit serial number, i.e. 01, 03, 04, etc.

4 Ordering content

4.1 Contracts or orders based on this Standard shall include the following contents. 4.2 If the information is not indicated in contracts, such as dimensions and roughness accuracy, surface quality grade, surface structure type, rim condition and packaging, the supplier shall supply goods in accordance with common dimensions and roughness accuracy, relatively high-grade surface, pitted surface structure and trimming state, and packaging method of the supplier.

5 Dimensions, shape and weight

The dimensions, shape, weight and tolerances of steel plates (sheets) and strips shall be as specified in GB/T 708.

6 Technical requirements

6.1 Chemical components For the reference values of steel chemical components (by smelting analysis) see Annex A. If the purchaser has any requirement for chemical components, it shall be as agreed on when an order is placed. For the cross-reference table of similar domestic and foreign standard designations refer to Annex B. 6.2 Smelting method Steel used for steel plates (sheets) and strips is smelted using an oxygen converter or electrical furnace; the smelting method is to be selected by the supplier. 6.3 Delivery condition 6.3.1 Steel plates and sheets are delivered in the condition of temper rolling after annealing. 6.3.2 Steel plates (sheets) and strips are usually delivered coating with oil; oil film coated can be removed using aqueous alkali or common solutions; under common packaging, transportation, handling and storage conditions, the supplier shall ensure that, within 6 months after the date of manufacture, steel plates (sheets) and strips does not rust. 6.4 Mechanical properties Mechanical properties of steel plates (sheets) shall be as specified in Table 4. 6.5 Tensile strain marks Tensile strain marks of steel plates (sheets) and strips shall be as specified in Table 5. 6.6 Surface quality 6.7 Surface structure When surface structure is of a pitted surface (D), the target value of average roughness Ra is greater than 0.6 μm but not greater than 1.9 μm; when surface structure is of a glossy surface (B), the target value of average roughness Ra is not greater than 0.9 μm. If the purchaser has special requirements for roughness, they shall be as agreed on during ordering.

7 Test methods

7.1 Chemical composition test of steel is usually carried out as specified in GB/T 4336, GB/T 20123, GB/T 20125 and GB/T 20126, or general chemical analysis methods; arbitration shall be carried out as specified in GB/T 223.9, GB/T 223.16, GB/T 223.40, GB/T 223.59, GB/T 223.63 and GB/T 20125. 7.2 The inspection items and test methods of steel plates (sheets) and strips shall be as specified in Table 7. 7.3 r90 is calculated at 15% of strain; when average elongation is less than 15%, strain is calculated at the end of average elongation.

8 Inspection rules

8.1 Inspection and acceptance of steel plates (sheets) and strips shall be carried out by the inspection department of the supplier. 8.2 Steel plates (sheets) and strips shall be accepted by batch. Each batch for inspection shall consist of steel plates (sheets) and strips of same designation, same specification and same processing condition. Weight of each batch shall not be greater than 30 t; for steel strips with a coil weight greater than 30 t, each coil is a batch for inspection. 8.3 Sample numbers and sample methods of steel plates (sheets) and strip shall be as specified in Table 7. 8.4 Reinspection and criteria for steel plates (sheets) and strips shall be as specified in GB/T 17505. 8.5 Test results of chemical components and mechanical properties shall be rounded off using the rounded-off value comparison method; the rules for rounding off shall be as specified in GB/T 8170.

9 Packaging, marking and quality certification

Packaging, marking and quality certification of steel plates (sheets) and strips shall be as specified in GB/T 247.If the purchaser has special requirements for packaging, they shall be as agreed on during ordering.

Annex A

(Informative) Chemical components of steel Table A.1 gives the reference values of chemical components of steel (by smelting analysis).

Annex B

(Informative) Cross-reference of similar domestic and foreign designations Table B.1 – Cross-reference of similar domestic and foreign designations This Standard ......
Source: Above contents are excerpted from the full-copy PDF -- translated/reviewed by: www.ChineseStandard.net / Wayne Zheng et al.


      

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