Standard No.:	Q/BQB 408-2014
English Name:	Cold formed low carbon steel sheet and strip for cold forming
Chinese Name:	冷成形用冷轧低碳钢板及钢带
Professional Classification:	Q/    Corporate Standard
Issued on:	2014-10-18
Implemented on:	2015-3-31
Status:	valid
Superseding:	Q/BQB 408-2009 Cold rolled strip and strip for stamping
Language:	English
File Format:	PDF
Word Count:	5000 words
Price(USD):	80.0
Delivery:	via email in 1 business day

1 Scope This Specification specifies the requirements for classification and code, dimension, shape, weight, technical requirements, inspection and test, packaging, marking and inspection documents of cold rolled low carbon steel plate and strip for cold forming. This Specification is applicable to cold rolled low carbon steel plate and strip with thickness of 0.17 mm ~ 3.5 mm produced by Baoshan Iron & Steel Co., Ltd. (hereinafter referred to as steel plate and strip). 2 Normative References The 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 222-2006 Permissible Tolerances for Chemical Composition of Steel Products GB/T 223 Methods for Chemical Analysis of Iron, Steel and Alloy GB/T 228.1-2010 Metallic Materials - Tensile Testing - Part 1: Method of Test at Room Temperature GB/T 230.1-2009 Metallic Materials - Rockwell Hardness Test - Part 1: Test Method(Scales A, B, C, D, E, F, G, H, K, N and T) GB/T 232-2010 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 4340.1-2009 Metallic Materials - Vickers Hardness Test - Part 1:Test Method GB/T 5027-2007 Metallic Materials - Sheet and Strip - Determination of Plastic Strain Ratio (r) GB/T 5028-2008 Metallic Materials - Sheet and Strip - Determination of Tensile Strain Hardening Exponent (n) GB/T 8170-2008 Rules of Rounding Off for Numerical Values & Expression and Judgement of Limiting Values GB/T 20066-2006 Steel and Iron - Sampling and Preparation of Samples for the Determination of Chemical Composition GB/T 20123-2006 Steel and Iron - Determination of Total Carbon and Sulfur Content Infrared Absorption Method after Combustion in an Induction Furnace (Routine Method) GB/T 20125-2006 Low-alloy Steel - Determination of Multi-element Contents - Inductively Coupled Plasma Atomic Emission Spectrometric Method GB/T 20126-2006 Unalloyed Steel - Determination of Low Carbon Content - Part 2: Infrared Absorption Method after Combustion in an Induction Furnace (with Preheating) Q/BQB 400 Packaging, Marking and Inspection Documents of Cold Rolled Products Q/BQB 401 Dimension, Shape, Weight and Tolerances of Cold Rolled Plate and Steel Strip JIS Z2241: 2011 Metallic Materials - Tensile Testing - Method of Test at Room Temperature 3 Classification and Code 3.1 Steel plate and steel strip distinguished by purpose shall be in accordance with those specified in Table 1. 3.2 Steel plate and steel strip distinguished by surface quality shall be in accordance with those specified in Table 2. 3.3 Steel plate and steel strip distinguished by surface structure shall be in accordance with those specified in Table 3.

1 Scope 2 Normative References 3 Classification and Code 4 Ordering Information 5 Dimension, Shape, Weight and Tolerances 6 Technical Requirements 7 Inspection and Test 8 Packaging, Marking and Inspection Documents 9 Rules of Rounding-off for Numerical Values 10 Approximation Comparison of Designations Annex A (Normative) Hard Materials Annex B (Informative) Approximation Comparison Between Designations of This Specification and Those of Domestic and Foreign Specifications