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Q/BQB 403-2009 PDF in English


Q/BQB 403-2009 (Q/BQB403-2009, QBQB 403-2009, QBQB403-2009)
Standard IDContents [version]USDSTEP2[PDF] delivered inName of Chinese StandardStatus
Q/BQB 403-2009English70 Add to Cart 0-9 seconds. Auto-delivery. [Replaced by Q/BQB 408] Cold-rolled low carbon steel plate and steel strip Obsolete
Q/BQB 403-2003English70 Add to Cart 0-9 seconds. Auto-delivery. Cold-rolled low carbon steel plate and steel strip Obsolete
Standards related to (historical): Q/BQB 403-2009
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Q/BQB 403-2009: PDF in English (QBQB 403-2009)

Q/BQB 403-2009 Q/BQB ENTERPRISE STANDARD OF BAOSHAN IRON & STEEL CO., LTD. Replacing Q/BQB 403-2003, BZJ 492-2004 Cold-rolled low carbon steel plate and strip Issued on. January 08, 2009 Implemented before. June 30, 2009 BAOSHAN IRON & STEEL CO., LTD. Table of Contents 1 Scope ... 3 2 Normative references ... 3 3 Classification and code ... 4 4 Information required for ordering ... 5 5 Dimension, shape, weight and permissible tolerance ... 5 6 Technical requirements ... 6 7 Inspection and test ... 8 8 Packaging, mark and quality certificate ... 10 9 Rules of rounding off ... 10 10 Comparison of similar designations ... 10 Appendix A ... 11 Additional explanation... 12 Cold-rolled low carbon steel plate and strip 1 Scope This Standard specifies the classification and code, dimension, shape, weight, technical requirements, inspection and test, packaging, marking and quality certificate etc. of cold-rolled low carbon steel plate and strip. This Standard is applicable to cold-rolled low carbon steel plate and strip (hereinafter refer as steel plate and steel strip) of which the thickness is 0.17mm~3.5mm, produced by Baoshan Steel Co. Ltd. 2 Normative references The provisions in following documents become the provisions of this Standard through reference in this Standard. For dated references, the subsequent amendments (excluding corrigendum) or revisions do not apply to this Standard, however, parties who reach an agreement based on this Standard are encouraged to study if the latest versions of these documents are applicable. For undated references, the latest edition of the referenced document applies. GB/T 222-2006 Method of sampling steel for determination of chemical composition and permissible variations for product analysis GB/T 223 Chemical analysis method of steel and alloy GB/T 228-2002 Metallic materials - Tensile testing at ambient temperature GB/T 2523-2008 Measuring method of surface roughness and peak count for cold-rolled metal sheet (strip) GB/T 2975-1998 Steel and steel products - Location and preparation of test pieces for mechanical testing GB/T 5027-2007 Metallic materials - Sheet and strip - Determination of plastic strain ratio (r-values) GB/T 5028-1999 Metallic materials - Sheet and strip - Determination of tensile strain hardening exponent (n-values) GB/T 8170-2008 Rules for rounding off of numerical values Table 3. Table 3 Surface structure Code Dull surface D Bright surface B 4 Information required for ordering 4.1 The customer shall provide the following information when ordering goods. a) Product name b) This product standard number c) Designation d) Product specification and size, and roughness precision e) Edge status f) Surface structure g) Quality level of surface h) Packaging method i) Use purpose 4.2 If size, roughness precision, surface structure, quality level of surface, edge status and packaging method are not indicated in the ordering contract, then the edge-sheared steel strip and edge-sheared steel plate, that are with ordinary size and roughness precision, dull textured surface, surface quality of FB level, shall be supplied; and the packaging method shall be provided according to the supplier. 5 Dimension, shape, weight and permissible tolerance Dimension, shape, weight and permissible tolerance of steel plate and steel strip shall comply with the provision of Q/BQB 401. Table 6 Designation Tensile Strain Mark DC01 Within 3 months after the date of completion of manufacturing, it shall have no tensile strain mark when use. DC03, DC04 Within 6 months after the date of completion of manufacturing, it shall have no tensile strain mark when use. DC05, DC06, DC07 It shall have no tensile strain mark when use. 6.6 Surface quality 6.6.1 Surface of steel plate and strip shall have no defects such as scar, crack and impurities that are harmful for the usage; there must not have delamination. 6.6.2 Characteristics of surface quality level of steel plate and strip are indicated in Table 7. Table 7 Level Code Characteristics Relative high- level finishing surface FB The surface is allowed to have defects that do not affect the moldability AND adhesion of painting and plating, such as, slight scratching, press-mark, dot, roller-mark and oxidation color. High-level finishing surface FC There is no obvious defect, that is visible by naked eyes, on the better side of the product; and the other side must at least meet the requirements of FB. Ultra high- level finishing surface FD There must not have any defect on the better side of the product, that is, it shall not affect the appearance quality after painting or plating; the other side must at least meet the requirements of FB. 6.6.3 For steel strip, as there is no chance to cut the defective part, so it is allowed to deliver with defects. However, the defective part shall not exceed 6% of total length of each roll. 6.7 Surface structure When surface structure is dull (D), the average roughness Ra shall be controlled within 0.6µm < Ra ≤ 1.9µm; when surface structure is bright (B), the average roughness Ra shall be controlled Ra ≤ 0.9µm. 7 Inspection and test 7.1 The appearance of steel plate and strip shall be inspected by naked eyes. 7.2 Dimension and shape of steel plate and strip shall be measured by 8 Packaging, mark and quality certificate Packaging, mark and quality certificate of steel plate and strip shall be in accordance with the provision of Q/BQB 400. If the demand-side has special requirements for packaging weight, it shall be indicated in the contract. 9 Rules of rounding off Rules of rounding off shall be in accordance with the provisions of GB/T 8170. 10 Comparison of similar designations Comparison of similar designations between this Standard and domestic- foreign standards is shown in Appendix A. Appendix A (Informative) Comparison table of designations between this Standard and domestic- foreign standards Table A.1 Q/BQB 403-2009 ISO 3754.1999 EN 10130.2006 GB/T 5213- Q/BQB 403-2003 BZJ 492-2004 DC01 CR1 DC01 DC01 DC01 DC03 CR2 DC03 DC03 DC03 DC04 CR3 DC04 DC04 DC04 DC05 CR4 DC05 DC05 DC05 DC06 CR5 DC06 DC06 DC06 DC07 - DC07 DC07 - Additional explanation. This Standard was formulated by reference to EN 10130-2006. This Standard replaces Q/BQB 403-2003 and BZJ 492-2004. Compared with Q/BQB 403-1999 and BZJ 492-2004, the main changes of this Standard are as follows. — Add new designation DC07; — Modify the yield strength, tensile strength, elongation rate after fracture, r-value and n-value of relevant designations. Appendix A of this Standard is informative. This Standard was proposed by Technical Quality Management Department of Baoshan Steel Co., Ltd. This Standard was proposed by Technical Quality Management Department of Baoshan Steel Co., Ltd. The drafter of this Standard. Tu Sulin. This Standard was first issued in 1988, first revised in 1994, secondly revised in 1999, and thirdly revised in 2003. This is the fourth revision. ......
 
Source: Above contents are excerpted from the PDF -- translated/reviewed by: www.chinesestandard.net / Wayne Zheng et al.