GB/T 5313-2010 (GB/T5313-2010)

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GB/T 5313-2010: PDF in English (GBT 5313-2010)
GB/T 5313-2010
GB
ICS 77.140.50
H 44
NATIONAL STANDARD OF THE
PEOPLE'S REPUBLIC OF CHINA
Replacing GB/T 5313-1985
Steel plate with through-thickness
characteristics
ISSUED ON. DECEMBER 23, 2010
IMPLEMENTED ON. SEPTEMBER 01, 2011
Issued by. General Administration of Quality Supervision, Inspection and
Quarantine of the People's Republic of China;
Standardization Administration of the People's Republic of
China.
Table of Contents
Foreword ... 3 
1 Scope ... 4 
2 Normative references ... 4 
3 Expression method of designation ... 4 
4 Technical requirements ... 4 
5 Coupon and sample preparation ... 5 
6 Test methods ... 6 
7 Inspection rules ... 7 
Annex A ... 9 
Annex B... 10 
Bibliography ... 12 
Foreword
This Standard was drafted according to the rules specified in GB/T 1.1-2009.
This Standard is a revision to "Steel Plate with Through-thickness Characteristics" by
reference to "Steel Products with Improved Deformation Properties Perpendicular to
the Surface of the Product” (EN 10164. 20) and based on the production and
application of steel plate with through-thickness characteristics in China.
This Standard replaces "Steel Plate with Through-thickness Characteristics" (GB/T
5313-1985); compared with GB/T 5313-1985, the main changes are as follows.
- CANCEL the yield strength grade of applicable steel plate;
- INCREASE the maximum thickness of steel plate from 150 mm to 400 mm;
- MODIFY the requirements for the preparation and inspection of sample.
The Annex A and Annex B of this Standard are normative.
This Standard was proposed by China Iron & Steel Association.
This Standard is under the jurisdiction of National Technical Committee on Iron and
Steel of Standardization Administration of China (SAC/TC 183).
Drafting organizations of this Standard. Hebei Iron & Steel Group Wuyang Iron &
Steel Co., Ltd., Jiangsu Shagang Group Co., Ltd., Hunan Valin Xiangtan Iron & Steel
Co., Ltd., Tianjin Iron & Steel Group Co., Ltd., Xinyu Iron & Steel Group Co., Ltd.,
China Metallurgical Information and Standardization Institute, Anyang Iron & Steel Inc.
and Shougang Corporation.
Main drafters of this Standard. Zhao Wenzhong, Zhang Huahong, Xie Liangfa, Chang
Yuefeng, Li Xiaobo, Li Xiaoli, Zeng Xiaoping, Zhang Junsheng, Wang Xiaohu, Li Zilin,
Shi Li, Wang Yongran and Lv Ruiguo.
The previous editions of the standards replaced by this Standard are as follows.
- GB/T 5313-1985.
Steel plate with through-thickness characteristics
1 Scope
This Standard specifies the through-thickness characteristic grades, test methods and
inspection rules of steel plates. The through-thickness characteristic grade is a
measurement for the lamellar-tearing resistance of steel plates, and the
through-thickness characteristics may be assessed according to the reduction of area
in through-thickness tensile test.
This Standard is applicable to killed steel plates with a thickness of 15 mm ~ 400 mm.
2 Normative references
The following documents are indispensable for the application of this document. For
dated references, only the dated editions are applicable to this document. For
undated references, the latest editions (including all the amendments) are applicable
to this document.
GB/T 228.1 Metallic Materials - Tensile Testing - Part 1. Method of Test at Room
Temperature (GB/T 228.1-2010, ISO 6892-1.2009, MOD)
GD/T I7505 Steel and Steel Products. General Technical Delivery Requirements
3 Expression method of designation
The designation of steel plate with through-thickness characteristics which is ordered
according to this Standard, is composed of the original designation of products and
the required through-thickness characteristic grade.
For example. Q345GJDZ25
Q345GJD - The original designation in GB/T 19879;
Z25 - The required through-thickness characteristic grade in this Standard.
4 Technical requirements
Samples with or without extension shall be prepared through the coupon cut
according to the following steps; the axes of samples shall be vertical to the surface of
steel plate. The samples with extension are specified as follows.
1) For 15 mm≤t≤20 mm, there shall be extension and t refers to the thickness of
products;
2) For t>20 mm, it may select extension and t refers to the thickness of products.
5.3 Sample with extension (see Figure B.1)
Before welding, all rust, scale, grease and other foreign bodies shall be removed from
the sample surface.
1) Friction welding or other appropriate methods shall be adopted to minimize the
heat affected zone and weld the extension to the two surfaces of samples.
2) The sample diameter d0 is as follows.
For 15 mm≤t≤25 mm, t refers to the thickness of products, d0=6 mm or 10 mm;
For t>25 mm, t refers to the thickness of products, d0=10 mm.
3) The parallel length LC of samples shall be greater than or equal to 1.5d0 and
shall not exceed 80 mm; the heat-affected zone shall be beyond LC.
5.4 Sample without extension (see Figure B.2 and B.3)
1) The sample diameter d0 is as follows.
For 20 mm≤t≤40 mm, t refers to the thickness of products, d0=6 mm or 10 mm;
For 40 mm< t≤400 mm, t refers to the thickness of products, d0=10 mm.
2) The parallel length LC of samples shall be greater than or equal to 1.5d0 and
shall not exceed 80 mm.
3) For products with t≤80 mm, the total length Lt of samples shall be equal to the
full thickness t of products.
5.5 For products with 80 mm< t≤400 mm, the total length Lt of samples shall ensure LC
covers 1/4 of the product thickness.
6 Test methods
The through-thickness tensile test shall be carried out in accordance with GB/T 228.1
1) The average value of 6 samples shall be greater than or equal to the specified
minimum average value.
2) Among the 6 samples, the single values of two samples at most are allowed to
be less than the specified minimum average value.
3) Among the 6 samples, the single value of one sample at most is allowed to be
less than the specified minimum value of individual sample.
If it fails to meet the above conditions, the products represented by the coupon will be
rejected.
7.3 Re-inspection
7.3.1 Where Z15 steel plate is inspected by batch, the re-inspection shall meet the
requirements of sequential test in GB/T 7505.
7.3.2 As for unqualified steel plate in re-inspection, the supplier may carry out another
test after heat treatment or re-heat treatment so as to judge whether it is qualified or
not.
7.4 Retest
In case of inappropriate processing or poor welding, the relevant samples shall be
abandoned. If the sample rupture is located at weld, heat-affected zone or extension,
the samples shall be invalid. On this occasion, samples may be cut from the same
coupon for retest.
Annex A
(Normative)
Supplementary Requirements
The following supplementary requirements can only be adopted where both supplier
and purchaser agree and such requirements are noted in the contract.
A.1 The requirements of tensile strength during through-thickness test.
A.2 The requirements of other sampling positions.
......
 
(Above excerpt was released on 2016-05-22, modified on 2022-02-20, translated/reviewed by: Wayne Zheng et al.)
Source: https://www.chinesestandard.net/PDF.aspx/GBT5313-2010