Q/BQB 402-2009 PDF EnglishUS$70.00 · In stock · Download in 9 seconds
Q/BQB 402-2009: Cold-rolled carbon steel and steel strip Delivery: 9 seconds. True-PDF full-copy in English & invoice will be downloaded + auto-delivered via email. See step-by-step procedure Status: Obsolete
Similar standardsQ/BQB 402-2009: Cold-rolled carbon steel and steel strip---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/QBQB402-2009BQB ENTERPRISE STANDARD OF BAOSHAN IRON AND STEEL CO., LTD Replacing Q/BQB 402-2003, BZJ 491-2004 Continuously-cold-rolled carbon steel sheets and strips Table of Contents1 Scope... 3 2 Normative references... 3 3 Classification and code... 4 4 Information required for ordering... 5 5 Dimension, shape, weight and allowable deviation... 6 6 Technical requirements... 6 7 Inspection and test... 10 8 Packaging, marking and inspection documents... 11 9 Numerical rounding rules... 11 10 Approximate comparison of designation... 11 Appendix A (Informative) Approximate comparison between the designations of this standard and domestic and foreign standard... 12 Additional information... 12 Continuously-cold-rolled carbon steel sheets and strips1 ScopeThis standard specifies the classification and code, size, shape, weight, technical requirements, inspection and test, packaging, marking and inspection documents of continuously-cold-rolled carbon steel sheets and strips. This standard applies to the continuously-cold-rolled carbon steel sheets and strips (hereinafter referred to as steel sheets and strips) which have a thickness of 0.17 mm ~ 3.5 mm as produced by Baoshan Iron and Steel Co., Ltd.2 Normative referencesThe provisions in following documents become the provisions of this Standard through reference in this Standard. For the dated references, the subsequent amendments (excluding corrections) 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 Permissible tolerances for chemical composition of steel products GB/T 223 Methods for chemical analysis of steel and alloys GB/T 228-2002 Metallic materials - Tensile testing at ambient temperature GB/T 230.1-2004 Metallic Rockwell hardness test - Part 1.Test method (scales A, B, C, D, E, F, G, H, K, N, T) GB/T 232-1999 Metallic materials - Bend test 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 4336-2002 Standard test method for spark discharge atomic emission spectrometric analysis of carbon and low-alloy steel (routine method) GB/T 4340.1-1999 Metallic materials - Vickers hardness test - Part 1.Test method3 Classification and code3.1 The classification of steel sheets and strips according to use shall comply with the requirements in Table 1. 3.3 The classification of steel sheets and strips according to the surface structure shall meet the requirements in Table 3. 3.4 The classification of steel sheets and strips according to the type of heat treatment shall meet the requirements in Table 4.4 Information required for ordering4.1 The user shall provide the following information when ordering. 4.2 If the dimension and unevenness accuracy, heat treatment type, surface structure, surface quality level, edge status and packaging method are not specified in the order contract, the product under this standard is supplied based on the common dimension and unevenness accuracy,5 Dimension, shape, weight and allowable deviationThe size, shape, weight and allowable deviation of steel sheets and steel strips shall comply with the requirements of Q/BQB 401.6 Technical requirements6.1 Chemical composition 6.1.1 The chemical composition (smelting analysis) of steel shall meet the requirements of Table 5. Table 5 6.3 Delivery status 6.3.1 Steel sheets and steel strips are supplied by heat treatment after continuously-cold-rolling. The type of heat treatment shall meet the requirements in Table 4. 6.4 Mechanical properties 6.4.1 The mechanical properties of annealed and flattened steel sheets and strips shall meet the requirements of Table 6. 6.4.3 Hardness For 1/8 hard, 1/4 hard and hard steel sheets and strips, the hardness (HRB or HV) shall meet the requirements of Table 7. 6.7 Surface quality 6.7.1 The surface of steel sheets and strips shall not have scars, cracks, inclusions, etc. which are harmful to use; the steel sheets and strips shall not be delaminated. 6.7.2 The characteristics of each surface quality level of steel sheets and strips shall comply with the requirements in Table 10. 6.8 Surface structure When the surface structure is pitted (D), the average roughness Ra is controlled by 0.6 µm < Ra ≤ 1.9 µm; when the surface structure is bright surface (B), the average roughness Ra is controlled by Ra ≤ 0.9 µm.7 Inspection and test7.1 The appearance of steel sheets and strips shall be visually inspected. 7.2 The dimensions and shapes of steel sheets and strips shall be measured by suitable measuring tools. 7.3 The r value is calculated at 15% strain. When the uniform elongation is less than 15%, it is calculated based on the strain value at the end of the uniform elongation. 7.6 For the tensile, plastic strain ratio (r value), hardness, bend tests, if any test results do not meet the standard requirements, it shall double the number of samples from the same batch and re-test the unqualified item.8 Packaging, marking and inspection documentsThe packaging, marking and inspection documents of steel sheets and strips shall comply with Q/BQB 400.If the purchaser has special requirements for the weight of the package, it shall be specified in the contract.9 Numerical rounding rulesNumerical rounding rules shall comply with the provisions of GB/T 8170.10 Approximate comparison of designationThe approximate comparison between the designations of this standard and domestic and foreign standard is as shown in Appendix A. Q/BQB 402-2009 BQB ENTERPRISE STANDARD OF BAOSHAN IRON AND STEEL CO., LTD Replacing Q/BQB 402-2003, BZJ 491-2004 Continuously-cold-rolled carbon steel sheets and stripsTable of Contents1 Scope... 3 2 Normative references... 3 3 Classification and code... 4 4 Information required for ordering... 5 5 Dimension, shape, weight and allowable deviation... 6 6 Technical requirements... 6 7 Inspection and test... 10 8 Packaging, marking and inspection documents... 11 9 Numerical rounding rules... 11 10 Approximate comparison of designation... 11 Appendix A (Informative) Approximate comparison between the designations of this standard and domestic and foreign standard... 12 Additional information... 12 Continuously-cold-rolled carbon steel sheets and strips1 ScopeThis standard specifies the classification and code, size, shape, weight, technical requirements, inspection and test, packaging, marking and inspection documents of continuously-cold-rolled carbon steel sheets and strips. This standard applies to the continuously-cold-rolled carbon steel sheets and strips (hereinafter referred to as steel sheets and strips) which have a thickness of 0.17 mm ~ 3.5 mm as produced by Baoshan Iron and Steel Co., Ltd.2 Normative referencesThe provisions in following documents become the provisions of this Standard through reference in this Standard. For the dated references, the subsequent amendments (excluding corrections) 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 Permissible tolerances for chemical composition of steel products GB/T 223 Methods for chemical analysis of steel and alloys GB/T 228-2002 Metallic materials - Tensile testing at ambient temperature GB/T 230.1-2004 Metallic Rockwell hardness test - Part 1.Test method (scales A, B, C, D, E, F, G, H, K, N, T) GB/T 232-1999 Metallic materials - Bend test 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 4336-2002 Standard test method for spark discharge atomic emission spectrometric analysis of carbon and low-alloy steel (routine method) GB/T 4340.1-1999 Metallic materials - Vickers hardness test - Part 1.Test method3 Classification and code3.1 The classification of steel sheets and strips according to use shall comply with the requirements in Table 1. 3.3 The classification of steel sheets and strips according to the surface structure shall meet the requirements in Table 3. 3.4 The classification of steel sheets and strips according to the type of heat treatment shall meet the requirements in Table 4.4 Information required for ordering4.1 The user shall provide the following information when ordering. 4.2 If the dimension and unevenness accuracy, heat treatment type, surface structure, surface quality level, edge status and packaging method are not specified in the order contract, the product under this standard is supplied based on the common dimension and unevenness accuracy,5 Dimension, shape, weight and allowable deviationThe size, shape, weight and allowable deviation of steel sheets and steel strips shall comply with the requirements of Q/BQB 401.6 Technical requirements6.1 Chemical composition 6.1.1 The chemical composition (smelting analysis) of steel shall meet the requirements of Table 5. Table 5 6.3 Delivery status 6.3.1 Steel sheets and steel strips are supplied by heat treatment after continuously-cold-rolling. The type of heat treatment shall meet the requirements in Table 4. 6.4 Mechanical properties 6.4.1 The mechanical properties of annealed and flattened steel sheets and strips shall meet the requirements of Table 6. 6.4.3 Hardness For 1/8 hard, 1/4 hard and hard steel sheets and strips, the hardness (HRB or HV) shall meet the requirements of Table 7. 6.7 Surface quality 6.7.1 The surface of steel sheets and strips shall not have scars, cracks, inclusions, etc. which are harmful to use; the steel sheets and strips shall not be delaminated. 6.7.2 The characteristics of each surface quality level of steel sheets and strips shall comply with the requirements in Table 10. 6.8 Surface structure When the surface structure is pitted (D), the average roughness Ra is controlled by 0.6 µm < Ra ≤ 1.9 µm; when the surface structure is bright surface (B), the average roughness Ra is controlled by Ra ≤ 0.9 µm.7 Inspection and test7.1 The appearance of steel sheets and strips shall be visually inspected. 7.2 The dimensions and shapes of steel sheets and strips shall be measured by suitable measuring tools. 7.3 The r value is calculated at 15% strain. When the uniform elongation is less than 15%, it is calculated based on the strain value at the end of the uniform elongation. 7.6 For the tensile, plastic strain ratio (r value), hardness, bend tests, if any test results do not meet the standard requirements, it shall double the number of samples from the same batch and re-test the unqualified item.8 Packaging, marking and inspection documentsThe packaging, marking and inspection documents of steel sheets and strips shall comply with Q/BQB 400.If the purchaser has special requirements for the weight of the package, it shall be specified in the contract.9 Numerical rounding rulesNumerical rounding rules shall comply with the provisions of GB/T 8170.10 Approximate comparison of designationThe approximate comparison between the designations of this standard and domestic and foreign standard is as shown in Appendix A. ......Source: Above contents are excerpted from the full-copy PDF -- translated/reviewed by: www.ChineseStandard.net / Wayne Zheng et al. 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