YB/T 2011-2014 English PDF (YBT2011-2014)

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YB/T 2011-2014: Continuous casting square and rectangular blank
YB/T 2011-2014
YB
NATIONAL STANDARD OF THE
PEOPLE’S REPUBLIC OF CHINA
ICS 77.140.70
H 43
Replacing YB/T 2011-2004
Continuous casting square and rectangular blank
ISSUED ON. MAY 06, 2014
IMPLEMENTED ON. OCTOBER 01, 2014
Issued by. Ministry of Industry and Information Technology of the
People’s Republic of China
Table of Contents
Foreword ... 3 
1 Scope ... 4 
2 Normative references ... 4 
3 Terms and definitions ... 4 
4 Order contents ... 5 
5 Dimensions, appearance, weight and allowable deviation ... 5 
6 Technical requirements ... 8 
7 Test method ... 9 
8 Inspection rules ... 10 
9 Transport, storage, marks and quality certificate ... 11 
Foreword
This Standard is drafted in accordance with the rules specified in GB/T 1.1-2009.
This Standard replaces YB/T 2011-2004 Continuous casting square and rectangular
blank.
Compared with YB/T 2011-2004, the main differences of this Standard are as follows.
-- Modify the provisions of bulges;
-- Add the provisions of sinking;
-- Modify the schematic diagram of shearing oblique;
-- Add the provisions of furnace number classification;
-- Modify the provisions of shrinkage cavity in top cutting and end cutting.
-- Delete the provisions of bulge measurement.
This Standard was proposed by China Iron and Steel Association.
This Standard shall be under the jurisdiction of National Technical Committee of Steel
Standardization (SAC/TC183).
Drafting organizations of this Standard. Hebei Shougang Qian An Iron and Steel Co., Ltd.,
Anshan Baode Iron and Steel Co., Ltd, Tianjin Iron and Steel Group Co., Ltd., China
Metallurgical Information and Standardization Institute, and Shougang Group.
Main drafters of this Standard. Liu Xiaoyan, Wang Hongxin, Wang Liping, Gong Wenchao,
Liu Baoshi, Zhang Bingcheng, Li Bingyi, Shi Li, and Wang Yujian.
The previous versions replaced by this Standard are. YB 2011-1983, ND YB/T 2011-2004.
Continuous casting square and rectangular blank
1 Scope
This Standard specifies the definition, order contents, dimensions, appearance, weight as
well as allowable deviation, technical requirements, test methods, inspection rules,
transport, storage, marks, and quality certificate of non-alloy steel, low-alloy steel, and
alloy-steel continuous casting square and rectangular blank (hereinafter referred to as
continuous casting blank).
This Standard is applicable to non-alloy steel, low-alloy steel, and alloy-steel (excluding
tool steel) continuous casting blank which are classified in accordance with GB/T 13304.1
and GB/T 13304.2.
2 Normative references
The articles contained in the following documents have become part of this document
when they are quoted herein. For the dated documents so quoted, all the modifications
(including all corrections) or revisions made thereafter shall be applicable to this
document.
GB/T 222 Permissible tolerances for chemical composition of steel products
GB/T 226 Etch test for macrostructure and defect of steels
GB/T 2101 General requirement of acceptance packaging marking and certification
for section steel
GB/T 20066 Steel and iron-Sampling and preparation of samples for the
determination of chemical composition
GB/T 13304.1 Steels classification - Part 1. Classification of according to chemical
composition
GB/T 13304.2 Steels classification - Part 2. Classification of according to main quality
classes and main property or application characteristics
YB/T 153 Standard diagrams for macrostructure and defect in quality carbon
structural steel and alloy structural steel continuous casting blank
3 Terms and definitions
The following terms and definitions apply to this Standard.
3.1
Continuous casting square blank
It refers to the continuous casting blank of which the four sides of the cross section are in
the same length, and the four interior angles are 90°.
3.2
Continuous casting rectangular blank
It refers to the continuous casting blank of which the two opposite sides are in the same
length, four interior angles are 90°, and the length of the longer sides is not more than 2.5
times of the length of the shorter sides.
4 Order contents
Order contract according to this Standard shall include the following contents.
a) Standard number;
b) Product name;
c) Grade;
d) Delivered weight (theoretical or actual weight);
e) Dimensions;
f) Special requirements.
5 Dimensions, appearance, weight and allowable deviation
5.1 Dimensions and allowable deviation
5.1.1 Dimensions and allowable deviation of continuous casting blank shall comply with
the requirements indicated in table 1.
5.1.2 According to the demander’s needs, continuous casting blank can be delivered at
specified or unspecified length; allowable deviation of specified length is mm.
5.1.3 Under the negotiation of the supplier and the demander, allowable deviation of
dimension and appearance of continuous casting blank can be appropriately adjusted.
ensure the conformity of the macrostructure, inspection may be exempted.
6.6 Surface quality
6.6.1 There shall be no visible halved joint, skull patch, scabs and impurity on the surface
of the continuous casting blank.
6.6.2 There shall be no crack up to 2rmn depth on the surface of ordinary-quality non-alloy
steel and low-alloy steel; there shall be no crack up to 1mm depth on the surface of
superior non-alloy steel, special-quality non-alloy steel, and alloy steel.
6.6.3 There shall be no scratch, press mark, scrape, air hole, wrinkle, cold splash, lug and
pit up to 3mm in depth or height on the surface of ordinary-quality non-alloy steel and
low-alloy steel.
6.6.4 There shall be no scratch, press mark, air hole, wrinkle, cold splash, lug, pit and
lateral oscillation mark up to 2mm in depth or height on the surface of superior non-alloy
steel, special-quality non-alloy steel, and alloy steel.
6.6.5 There shall be no shrinkage cavity, subsurface blister and crack on the cross section
of the continuous casting blank.
6.6.6 If there is any flaw as specified above which is unallowable or beyond the allowable
scope, it shall be cut away. The cutting width shall not be less than 6 times of the depth,
and the cutting length shall not be less than 10 times of the depth. After the shaving, the
flaw part shall be smooth without edges and corners. The shaving depth of the single face
shall not be more than 8% of the side-length of the continuous casting blank, and the sum
of the cutting depth of the two opposite faces shall not be more than 12% of the thickness.
The cutting depth shall be calculated by the actual dimensions.
6.6.7 The surface quality requirements of the continuous casting blank can be properly
adjusted after the negotiation of both the demander and the supplier.
7 Test method
The inspection items, sampling quantity, sampling method and test method of each batch
of continuous casting blank shall comply with the provisions specified in table 3.
The re-check and judgment of continuous casting blank shall be conducted as per GB/T
2101.
9 Transport, storage, marks and quality certificate
9.1 In case of any special requirements proposed by the demander, they can be
determined by both parties through negotiation.
9.2 Each continuous casting blank shall be marked with grade, furnace number, etc. on
the ends or the sides close to the ends.
9.3 The quality certificate shall comply with the provisions of GB/T 2101.