Q/BQB 612-2023 (Q/BQB612-2023, QBQB 612-2023, QBQB612-2023) & related versions
Q/BQB 612-2023: PDF in English (QBQB 612-2023)
Q/BQB 612-2018
ENTERPRISE STANDARD OF BAOSTEEL
Replacing Q/BQB 612-2013
Steel Plates for Building Structure
ISSUED ON: JANUARY 15, 2018
IMPLEMENTED ON: APRIL 10, 2018
Issued by: Baoshan Iron & Steel Co., Ltd.
Table of Contents
Foreword ... 3
1 Scope ... 4
2 Normative References ... 4
3 General Technical Requirements ... 5
4 Classification and Code ... 5
5 Dimension, Shape, Weight and Allowable Deviation ... 5
6 Technical Requirements ... 5
7 Inspection and Test ... 10
8 Appendix ... 12
Appendix A (Informative) Approximate Grade Comparison Table of this
Standard with Reference Standard and International Standard ... 13
Foreword
This Standard was drafted as per the rules specified in GB/T 1.1-2009 Directives for
Standardization – Part 1: Structure and Drafting of Standards.
This Standard was prepared by reference of JIS G 3136:2012 and the actual
production situation of Baosteel.
This Standard replaced Q/BQB 612-2013 Steel Plates for Building Structure.
Compared with the original standard, this Standard has the major changes as follows:
--- Delete the quotation of GB/T 20126 from the normative references, and add the
year number of GB/T 2975;
--- Tighten the regulations on the phosphorus and sulfur contents in some chemical
components.
The Appendix A of this Standard is informative.
This Standard was proposed by Manufacturing and Management Department of
Baoshan Iron & Steel Co., Ltd.
Drafting organization of this Standard: Manufacturing and Management Department of
Baoshan Iron & Steel Co., Ltd.
Drafting staff of this Standard: Huang Jinhua.
The historical editions replaced by this Standard are as follows:
--- Q/BQB 612-2004, Q/BQB 612-2009, Q/BQB 612-2013.
Steel Plates for Building Structure
1 Scope
This Standard specifies the dimension, shape, technical requirements, test sand
inspection, mark and inspection document of the steel plate for building structure.
This Standard is applicable to the steel plates for building structure manufactured by
the Baoshan Iron & Steel Co., Ltd.
2 Normative References
The following documents are essential to the application of this document. For the
dated documents, only the versions with the dates indicated are applicable to this
document; for the undated documents, only the latest version (including all the
amendments) are applicable to this document.
GB/T 223 Methods for Chemical Analysis of Iron, Steel and Alloy
GB/T 228.1 Metallic Materials - Tensile Testing - Part 1: Method of Test at Room
Temperature
GB/T 229 Metallic Materials - Charpy Pendulum Impact Test Method
GB/T 2975-1998 Steel and Steel Products - Location and Preparation of Test
Pieces for Mechanical Testing
GB/T 4336 Carbon and Low-Alloy Steel - Determination of Multi-Element Contents
-Spark Discharge Atomic Emission Spectrometric Method (Routine Method)
GB/T 5313 Steel Plates with Through-Thickness Characteristics
GB/T 20066 Steel and Iron - Sampling and Preparation of Samples for the
Determination of Chemical Composition
GB/T 20123 Steel and Iron - Determination of Total Carbon and Sulfur Content
Infrared Absorption Method after Combustion in an Induction Furnace (Routine
Method)
GB/T 20125 Low-Alloy Steel – Determination of Multi-Element Contents -
b When sampling is not possible at the specified sampling position, it shall be as close as possible to
such position.
7.3 Sampling frequency
7.3.1 Sampling frequency of chemical composition analysis
The smelting analysis shall be carried out against the chemical components as per the
furnace.
7.3.2 Sampling frequency of the tensile property
Each batch shall consist of the steel plates with a weight no more than 50t, the same
furnace number, the same grade, the maximum thickness no greater than 2 times of
the minimum thickness, the same delivery state. When the batch weight is greater than
50t, take two samples. When the batch consists of a single steel plate, take 1 sample.
7.3.3 Sampling frequency of impact property
Each batch shall consist of the steel plates with the same furnace number, the same
grade, the same delivery state. Sample shall take from the thickest steel plate in the
batch.
7.3.4 Sampling frequency of through-thickness property
When the delivery state is the heat treatment, each batch consists of the same rolling
mother board of the same heat treatment system. When the delivery state is not heat
treatment, each batch consists of the same rolling mother board.
7.3.5 Through the negotiation between the supplier and the purchaser, the batching
rules can be determined otherwise.
7.4 Reinspection
7.4.1 Reinspection of impact test
If the impact test results do not meet the specified requirements, the single-sheet steel
plate that has been tested disqualified shall not be accepted. The steel plates with the
same thickness as the sampling steel plate shall be submitted for impact test and
acceptance one by one. The new batch consisting of the steel plates with other
thickness shall be submitted for impact test and acceptance.
7.4.2 Reinspection of through-thickness property
If the average value of the 3 samples of the through-thickness property or certain single
value does not conform the provisions of Table 8, take another 3 samples from the
same sample billet for reinspection. When the average value of the 6 samples or single
......
| Standard ID | Q/BQB 612-2023 (Q/BQB612-2023) | | Description (Translated English) | Steel plates for building structure | | Sector / Industry | Chinese Industry Standard | | Classification of Chinese Standard | QBQ | | Word Count Estimation | 10,182 | | Date of Issue | 2023-04-09 | | Date of Implementation | 2023-07-01 |
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