1 Scope
This standard specifies such requirements of tandem cold rolling low-carbon steel sheet and strip as classification and code, dimension, appearance, weight, technical requirements, inspection and test as well as packaging, marking and inspection document.
It is applicable to tandem cold rolling low-carbon steel sheet and strip (hereinafter referred to as steel sheet and strip) with thickness of 0.17mm to 3.5mm produced by Baoshan Iron and Steel Co., Ltd.
2 Normative References
The following documents contain provisions which, through reference in this standard, constitute provisions of this standard. For dated reference, subsequent amendments (excluding corrections) to, or revisions, of any of these publications do not apply to this standard. However, parties to agreements based on this standard are encouraged to investigate the possibility of applying the most recent editions of the standards indicated below. For undated references, the latest edition of the normative document referred to applies.
GB 222-2006 Permissible Tolerances for Chemical Composition of Steel Products
GB/T 223 Methods for Chemical Analysis of Iron, Steel and Alloy
GB/T 228-2002 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 4336-2002 Standard Test Method for Spark Discharge Atomic Emission Spectrometric Analysis of Carbon and Low-alloy Steel (Routine Method)
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 & Expression and Judgment 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 Document of Cold-rolled Products
Q/BQB 401 Dimension, Appearance, Weight and Tolerance of Tandem Cold Rolling Steel Sheets and Strips
3 Classification and Code
3.1 The classification of steel sheets and strips in term of the usage is in accordance with the requirements as specified in Table 1.
1 Scope
2 Normative References
3 Classification and Code
4 Information Needed in Ordering
5 Dimension, Appearance, Weight and Tolerance
6 Technical Requirements
7 Inspection and Test
8 Packaging, Marking and Inspection Document
9 Rules for Rounding off of Numerical Values
10 Comparison Table of Similar Designations in this Standard and Other Standards Home and Abroad
Annex A (Informative) Comparison Table of Similar Designations in this Standard and Other Standards Home and Abroad
Additional Explanation
