Q/BQB 403-2009Translated English of Chinese Standard: Q/BQB403-2009 www.ChineseStandard.net [email protected] Q/BQB ENTERPRISE STANDARD OF BAOSHAN IRON & STEEL CO., LTD. Q/BQB 403-2009 Replacing Q/BQB 403-2003, BZJ 492-2004 Cold-rolled low carbon steel plate and strip 冷连轧低碳钢板及钢带 How to BUY & immediately GET a full-copy of this standard? 1. www.ChineseStandard.net; 2. Search --> Add to Cart --> Checkout (3-steps); 3. No action is required - Full-copy of this standard will be automatically & immediately delivered to your EMAIL address in 0~25 minutes. 4. Support: [email protected]. Wayne, Sales manager Issued on: January 08, 2009 Implemented before: June 30, 2009 BAOSHAN IRON & STEEL CO., LTD. www.ChineseStandard.net Page 1 of 12 ................................................................................................................. 6 7 Inspection and test ........................................................................................ 5 6 Technical requirements ....................................ChineseStandard......................................................... 8 8 Packaging........ 12 www............. 10 10 Comparison of similar designations ............................................ 4 4 Information required for ordering ............................................................................................... weight and permissible tolerance ........................................................................................ 3 3 Classification and code ........................................... 5 5 Dimension............... Q/BQB 403-2009 Table of Contents 1 Scope ...................................................................................................... mark and quality certificate . shape........................................net Page 2 of 12 ............................................................................................................. 3 2 Normative references ............................ 11 Additional explanation: . 10 9 Rules of rounding off ............... 10 Appendix A ...... 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 .5mm.17mm~3. packaging. shape. dimension. produced by Baoshan Steel Co. 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. marking and quality certificate etc. the subsequent amendments (excluding corrigendum) or revisions do not apply to this Standard. however.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 . Q/BQB 403-2009 Cold-rolled low carbon steel plate and strip 1 Scope This Standard specifies the classification and code. of cold-rolled low carbon steel plate and strip.Location and preparation of test pieces for mechanical testing GB/T 5027-2007 Metallic materials . weight. the latest edition of the referenced document applies. For dated references.ChineseStandard.Sheet and strip .Sheet and strip . parties who reach an agreement based on this Standard are encouraged to study if the latest versions of these documents are applicable. Ltd. inspection and test.Determination of plastic strain ratio (r-values) GB/T 5028-1999 Metallic materials .Determination of tensile strain hardening exponent (n-values) GB/T 8170-2008 Rules for rounding off of numerical values www.net Page 3 of 12 . 2 Normative references The provisions in following documents become the provisions of this Standard through reference in this Standard. technical requirements. For undated references. roughness precision.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.2 If size. shall be supplied. edge status and packaging method are not indicated in the ordering contract. weight and permissible tolerance Dimension. weight and permissible tolerance of steel plate and steel strip shall comply with the provision of Q/BQB 401. Table 3 Surface structure Code Dull surface D Bright surface B 4 Information required for ordering 4. shape. then the edge-sheared steel strip and edge-sheared steel plate. and the packaging method shall be provided according to the supplier. surface quality of FB level. surface structure. dull textured surface. and roughness precision e) Edge status f) Surface structure g) Quality level of surface h) Packaging method i) Use purpose 4. that are with ordinary size and roughness precision.net Page 5 of 12 . www. quality level of surface. Q/BQB 403-2009 Table 3. shape. 5 Dimension.ChineseStandard. DC05.net Page 8 of 12 . the other side must at least meet the surface requirements of FB. on the finishing FC better side of the product.ChineseStandard.6.6. 6.6µm < Ra ≤ 1. 7 Inspection and test 7. However. Q/BQB 403-2009 Table 6 Designation Tensile Strain Mark Within 3 months after the date of completion of manufacturing. that is. such as. it DC03.2 Dimension and shape of steel plate and strip shall be measured by www. so it is allowed to deliver with defects. there must not have delamination. DC04 shall have no tensile strain mark when use. the average roughness Ra shall be controlled within 0.6. roller-mark and oxidation surface color.2 Characteristics of surface quality level of steel plate and strip are indicated in Table 7. the defective part shall not exceed 6% of total length of each roll.1 The appearance of steel plate and strip shall be inspected by naked eyes.1 Surface of steel plate and strip shall have no defects such as scar.7 Surface structure When surface structure is dull (D). DC06. 7. Table 7 Level Code Characteristics The surface is allowed to have defects that do not affect the Relative high- moldability AND adhesion of painting and plating. it DC01 shall have no tensile strain mark when use. when surface structure is bright (B). it shall not affect the appearance quality after level finishing FD painting or plating. dot. Within 6 months after the date of completion of manufacturing.3 For steel strip. 6. and the other side must at least meet surface the requirements of FB. as there is no chance to cut the defective part. crack and impurities that are harmful for the usage. press-mark.9µm.6 Surface quality 6. level finishing FB slight scratching.9µm. DC07 It shall have no tensile strain mark when use. High-level There is no obvious defect. 6. that is visible by naked eyes. the average roughness Ra shall be controlled Ra ≤ 0. There must not have any defect on the better side of the Ultra high- product. 6. 9 Rules of rounding off Rules of rounding off shall be in accordance with the provisions of GB/T 8170. it shall be indicated in the contract.net Page 10 of 12 . www. Q/BQB 403-2009 8 Packaging. mark and quality certificate of steel plate and strip shall be in accordance with the provision of Q/BQB 400.ChineseStandard. mark and quality certificate Packaging. If the demand-side has special requirements for packaging weight. 10 Comparison of similar designations Comparison of similar designations between this Standard and domestic- foreign standards is shown in Appendix A. Q/BQB 403-2003 Q/BQB 403-2009 ISO 3754:1999 10130:2006 2008 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 .ChineseStandard. Q/BQB 403-2009 Appendix A (Informative) Comparison table of designations between this Standard and domestic- foreign standards Table A.1 EN GB/T 5213. DC07 DC07 - ____________________ www.net Page 11 of 12 . secondly revised in 1999. the main changes of this Standard are as follows: — Add new designation DC07. __________ END __________ www. Q/BQB 403-2009 Additional explanation: This Standard was formulated by reference to EN 10130-2006.. This Standard was proposed by Technical Quality Management Department of Baoshan Steel Co. This is the fourth revision. Ltd. Compared with Q/BQB 403-1999 and BZJ 492-2004. r-value and n-value of relevant designations. and thirdly revised in 2003.net Page 12 of 12 . This Standard was first issued in 1988. — Modify the yield strength.ChineseStandard. This Standard was proposed by Technical Quality Management Department of Baoshan Steel Co. tensile strength. elongation rate after fracture.. Appendix A of this Standard is informative. This Standard replaces Q/BQB 403-2003 and BZJ 492-2004. Ltd. The drafter of this Standard: Tu Sulin. first revised in 1994.