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Q/BQB 410-2014 English PDF (QBQB410-2014)

Q/BQB 410-2014 English PDF (QBQB410-2014)

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Q/BQB 410-2014: Cold-rolled carbon structural steel and steel strip

This Standard specifies the terms and definitions, classification and code, sizes, shapes, weights, technical requirements, inspection and test, packaging, marking and inspection documents of cold-rolled carbon structural steel and steel strip. This technical specification is applicable to cold-rolled carbon structural steel and steel strip manufactured by BAOSHAN Iron and amp; Steel Co., Ltd. with a thickness of 0.50 mm ~ 3.0 mm.
Q/BQB 410-2014
GB
TECHNICAL SUPPLY SPECIFICATION OF
BAOSHAN IRON and STEEL CO., LTD.
Replacing Q/BQB 410-2009
Cold-rolled Carbon Structural Steel and Steel Strip
ISSUED ON: OCTOBER 18, 2014
IMPLEMENTED ON: MARCH 31, 2015
Issued by: BAOSHAN IRON and 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 Sizes, Shapes, Weights and Permissible Deviations ... 5
6 Technical Requirements ... 5
7 Inspection and Test ... 8
8 Packaging, Marking and Inspection Documents ... 9
9 Rounding-off Rules of Numerical Values ... 9
10 Approximate Comparison of Designations ... 10
Appendix A (informative) An Approximate Comparison Table of Designations between This Technical Specification, and Domestic and Foreign Technical Specifications ... 11
Additional information: ... 11
Cold-rolled Carbon Structural Steel and Steel Strip
1 Scope
This Standard specifies the terms and definitions, classification and code, sizes, shapes, weights, technical requirements, inspection and test, packaging, marking and inspection documents of cold-rolled carbon structural steel and steel strip. This technical specification is applicable to cold-rolled carbon structural steel and steel strip manufactured by BAOSHAN Iron and Steel Co., Ltd. with a thickness of 0.50 mm ~ 3.0 mm (hereinafter referred to as steel plate and steel strip).
2 Normative References
The following documents are indispensable to the application of this document. In terms of references with a specified date, only versions with a specified date are applicable to this document. In terms of references without a specified date, the latest version (including all the modifications) is applicable to this document. 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 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 8170-2008 Rules of Rounding off for Numerical Values and 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
4 Information Required for Ordering
4.1 When ordering, the user shall provide the following information:
a) Product name (steel plate or steel strip);
b) Technical specification No.;
c) Designation;
d) Product specifications, sizes and unevenness accuracy;
e) State of margin;
f) Grade of surface quality;
g) Packaging mode;
h) Purpose;
i) Others.
4.2 If the order contract does not indicate the sizes and unevenness accuracy, the surface quality grade, the state of margin and packaging mode, then, the products of this technical specification shall be supplied as trimmed steel strips or trimmed steel plates in accordance with the ordinary sizes and unevenness accuracy, Grade-FB surface quality, and be packed in accordance with the packaging mode provided by the supply-side.
5 Sizes, Shapes, Weights and Permissible Deviations
The sizes, shapes, weights and permissible deviations of steel plates and steel strips shall comply with the stipulations of Q/BQB 401.
6 Technical Requirements
6.1 Chemical Composition
6.1.1 The chemical composition (smelting analysis) of steel shall comply with the 6.5 Surface Quality
6.5.1 On the surface of the steel plates and steel strips, there shall be no defects that are detrimental to the use, such as: holes, surface cracks and laminations, etc. 6.5.2 The characteristics of the various surface quality grades of the steel plates and steel strips shall comply with the stipulations of Table 7.
Table 7
6.5.3 For steel strips, since there is no change to remove the defective part, the steel strips are allowed to be delivered with defects, but the defective part shall not exceed 6% of the total length of each coil.
6.6 Surface Structure
When the surface structure is pitted (D), the average roughness Ra shall be controlled in accordance with 0.6 ??m < Ra ??? 1.9 ??m.
7 Inspection and Test
7.1 The appearance of the steel plates and steel strips shall be inspected through the naked eye.
7.2 The sizes and shapes of the steel plates and steel strips shall be measured with appropriate measuring tools.
7.3 The tensile test shall comply with Method B of GB/T 228.1. In order to improve the reproducibility of the measurement results, it is recommended to use the beam displacement control method, and the yield strength measurement rate is 5% Lc/min (Lc is the parallel length of the specimen).
7.4 The steel plates and steel strips shall be inspected and accepted in batches. Each inspection batch shall be composed of steel plates and steel strips of the same designation, the same specifications and the same processing state with a weight of not greater than 30 tons. For steel strips with a weight of not greater than 30 tons, each steel coil shall constitute an inspection batch.

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