Q/BQB 617-2018 English PDF (QBQB617-2018)

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Q/BQB 617-2018: Low yield strength steel plates for construction
Q/BQB 617-2018
ENTERPRISE STANDARD OF BAOSHAN
IRON and STEEL CO., LTD.
Replacing BZJ 610-2013
Low yield strength steel plates for construction
ISSUED ON: JANUARY 15, 2018
IMPLEMENTED ON: APRIL 10, 2018
Issued by: Baoshan Iron and 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 tolerances ... 5 
6 Technical requirements ... 5 
7 Inspection and test ... 7 
Foreword
This Standard is drafted in accordance with the rules given in GB/T 1.1-2009
“Directives for standardization - Part 1: Structure and drafting of standards”.
This Standard is developed based on Baosteel’s product development and
actual production situation.
This Standard replaces BZJ 610-2013 “Low yield strength steel plates for
construction”. As compared with the previous standard, the main changes are
as follows:
- In Normative references, ADD the reference to GB/T 20124; ADD the year
number of GB/T 2975;
- Define the sampling location of impact sample.
This Standard was proposed by Products and Technique Management
Department of Baoshan Iron and Steel Co., Ltd.
This Standard shall be under the jurisdiction of Products and Technique
Management Department of Baoshan Iron and Steel Co., Ltd.
This Standard was drafted by Products and Technique Management Department
of Baoshan Iron and Steel Co., Ltd.
Drafter of this Standard: Huang Jinhua.
This Standard is first published in January 2018.
Low yield strength steel plates for construction
1 Scope
This Standard specifies the dimension, shape, technical requirements,
inspection and test, marking, and quality certificate, etc. of low yield strength
steel plates for construction.
This Standard applies to low yield strength steel plates for construction
produced by Baoshan Iron and Steel Co., Ltd.
2 Normative references
The following documents are indispensable for the application of this document.
For the dated references, only the editions with the dates indicated are
applicable to this document. For the undated references, the latest edition
(including all the amendments) are applicable to this document.
GB/T 222 Permissible tolerances for chemical composition of steel products
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 2970 Method for ultrasonic testing of thicker steel plates
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
Table 5
No. Test items
Number of
samples,
pieces
Sampling method Test method
1 Chemical analysisa 1 (per
furnace)
GB/T 20066
GB/T 223, GB/T 4336,
GB/T 20123, GB/T
20124, GB/T 20125,
GB/T 20126, or general
method
2 Tensile test 1 GB/T 2975 GB/T 228.1
3 Impact test 1 group
(3 pieces)
GB/T 2975
Thickness ≤40mm, Figure
A11 a) (near-surface)
Thickness >40mm, Figure
A11 b) (1/4t)
GB/T 229
Through-thickness
tensile
characteristics test
(by agreement)
1 group
(3 pieces) GB/T 5313 GB/T 228.1
5 Ultrasonic testing - - GB/T 2970
a When conducting an arbitration test on chemical composition, USE GB/T 223.
7.3 Sampling frequency
7.3.1 Sampling frequency for chemical composition analysis
By furnace, perform smelting analysis of chemical composition.
7.3.2 Sampling frequency for mechanical properties and technological
properties
Each lot shall consist of the same rolled steel plate with the same furnace
number, the same designation, and the same delivery state.
7.3.3 Through negotiation between the supplier and the purchaser, the lot
grouping rules may be additionally determined.
7.4 Re-test
7.4.1 Re-test of impact test
If the impact test results do not meet the specified requirements, the single steel
plate which has been tested and of which the results are not acceptable cannot
be accepted. Other steel plates in the same lot can be submitted one by one
for impact test and acceptance.