GB/T 2975-2018 PDF English
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| Standard ID | Contents [version] | USD | STEP2 | [PDF] delivery | Name of Chinese Standard | Status |
| GB/T 2975-2018 | English | 145 |
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Steel and steel products -- Location and preparation of samples and test pieces for mechanical testing
| Valid |
| GB/T 2975-1998 | English | 70 |
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Steel and steel products - Location and preparation of test pieces for mechanical testing
| Obsolete |
| GB 2975-1982 | English | 199 |
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Rules for sampling in mechanical and technological testing of steel products
| Obsolete |
Excerpted PDFs (Download full copy in 9 seconds upon purchase)PDF Preview: GB/T 2975-2018
GB/T 2975-2018: Steel and steel products -- Location and preparation of samples and test pieces for mechanical testing
---This is an excerpt. Full copy of true-PDF in English version (including equations, symbols, images, flow-chart, tables, and figures etc.), auto-downloaded/delivered in 9 seconds, can be purchased online: https://www.ChineseStandard.net/PDF.aspx/GBT2975-2018
GB
NATIONAL STANDARD OF THE
PEOPLE’S REPUBLIC OF CHINA
ICS 77.040.10
H 20
Replacing GB/T 2975-1998
Steel and Steel Products - Location and Preparation
of Samples and Test Pieces for Mechanical Testing
(ISO 377.2017, MOD)
Issued on. MAY 14, 2018
Implemented on. FEBRUARY 1, 2019
Issued by. State Administration for Market Regulation;
Standardization Administration Committee of the People’s
Republic of China.
Table of Contents
Foreword... 3
1 Scope... 6
2 Normative References... 6
3 Terms and Definitions... 6
4 General Requirements... 8
5 Sample Preparation and Test Piece Selection... 9
6 Test Piece Preparation... 11
Appendix A... 12
Appendix B... 34
Foreword
This Standard is drafted in accordance with stipulations in GB/T 1.1-2009.
This Standard serves as a replacement of GB/T 2975-1998 Steel and Steel Products
- Location and Preparation of Test Pieces for Mechanical Testing. In comparison with
GB/T 2975-1998, there are several main changes of technical content as follows.
---Specific requirement of sample designation is added (please refer to 4.2);
---The term “leg part” is modified into “flange”; the “waist part” is modified into
“ventral shield” in section steel (please refer to A.2 in Version 1998);
---The requirement of sampling location of impact test piece along the thickness
direction of flange of section steel is modified (please refer to Figure A.3 in
Version 1998);
---The requirement of taking tensile billet sample of steel plate under the thickness
of 25 mm ≤ t < 50 mm is deleted; the requirement of taking tensile billet sample
of steel plate under the thickness of t ≥ 25 mm is unified (please refer to Figure
A.10);
---The requirement of taking tensile billet sample of tempered or
thermomechanical rolled (TMCP) steel plate is added (please refer to A.6.2.2
and footnote b of Figure A.10);
---The requirement of sampling location of impact billet of steel with thickness that
is more than 40 mm is refined; optional requirements of sampling of steel plate
under the thickness of 28 mm ≤ t < 40 mm are added (please refer to A.6.3 and
Figure A.11; A.4.4 in Version 1998);
---The minimum thickness or diameter of steel products under machining
allowance is modified from 20 mm into 12.5 mm; relevant content of “the
selection of laser-cutting machining allowance” is increased (please refer to
Appendix B).
This Standard is modified in accordance with the re-drafting law and ISO 377.2017
Steel and Steel Products - Location and Preparation of Samples and Test Pieces for
Mechanical Testing.
In comparison with ISO 377.2017, there are several technical differences. Please see
the technical differences and the causes for these differences below. Clauses that
involve these differences are already indicated through longitudinal single line () in the
blank of the outer margin.
---In terms of normative references, certain adjustment with technical differences
is made in this Standard, so that it can adapt to the technical conditions in China.
The condition of such adjustment is intensively reflected in Chapter 2
“Normative References”. Please see the specific adjustment below.
GB/T 15574, which adopts equivalent international standards, is applied as
a replacement of ISO 6929 (please refer to Chapter 3);
GB/T 20832, which adopts equivalent international standards, is applied as
a replacement of ISO 3785 (please refer to Chapter 5.2).
---In order to make this Standard more operable and maintain consistency with the
previous version of international standard, the requirement of sampling of
section steel with slanted flange is refined (please refer to A.2.1.2);
---In accordance with the domestic application, the requirement of sampling of T-
shaped steel is modified [please refer to Figure A.1c)];
---The requirement that “bending sample shall at least retain an original surface”
is added to A.1.3 (please refer to A.1.3);
---General requirements, comprehensive stipulated tensile and impact sampling
requirements are added to A.6.1; “the requirement that the direction and
location of steel plate sampling shall be stipulated in product standard” is added
to A.6.1;
---The requirement of sampling of longitudinally rolled steel plate is added (please
refer to A.6.1.3).
In order to make it convenient for users, there are several editorial modifications as
follows.
---In order to maintain consistency with symbols in the figures, the symbol of wall
thickness “T” is modified into “t” in Formula (A.1);
---Informative Appendix B “selection of sample billet machining allowance” is
added.
This Standard is proposed by China Iron and Steel Industry Association.
This Standard is summarized by National Technical Committee 183 on Iron and Steel
of Standardization Administration of China (SAC/TC 183).
This Standard is mainly drafted by the following organizations. China Metallurgical
Information and Standardization Institute, Central Iron & Steel Research Institute,
HUAGONG Machine Tool Shares, SHOUGANG Group, Jiangsu YONGGANG Group
Co., Ltd., Jiangsu Wujin Stainless Steel Pipe Group Co., Ltd.
The main drafters of this Standard include. Dongli, Gao Yifei, Zhou Lifu, Wangping,
Guoyu, Song Jianxin, Zhou Zhichao, Liqi, Wang Hongliang, Zhang Weixu.
The release of previous versions of the standard replaced by this Standard is as follows.
---GB/T 2975-1982, GB/T 2975-1998.
Steel and Steel Products - Location and Preparation
of Samples and Test Pieces for Mechanical Testing
1 Scope
This Standard specifies the designation, sampling location and preparation
requirements of mechanical testing of section steel, steel bar, steel wire rod, steel plate
and steel pipe defined in GB/T 15574.
2 Normative References
The following documents are indispensable to the application of this Standard. In terms
of references with a specified date, only versions with a specified date are applicable
to this Standard. The latest version (including all the modifications) of references
without a specified date is also applicable to this Standard.
GB/T 15574 Steel Products Classification (GB/T 15574-2016, ISO 6929.2013,
IDT)
GB/T 20832 Metallic Materials - Designation of Test Specimen Axes in Relation to
Product Texture (GB/T 20832-2007, ISO 3785.2006, IDT)
3 Terms and Definitions
The following terms and definitions, and the terms and definitions defined in GB/T
15574 are applicable to this document.
Rough specimen is sample material that goes through machining and thermal
treatment under proper circumstances for the preparation of sample.
Reference condition refers to the condition of sample material, rough specimen or test
piece after going through thermal treatment; it represents the ultimate expected
condition of products.
4 General Requirements
Sample, rough specimen and test piece that are taken in accordance with Appendix A
shall be deemed to be representative of the product.
5 Sample Preparation and Test Piece Selection
The selection of sample shall comply with the locations indicated in Appendix A.
Sample shall be in a sufficient dimension, so that sufficient test pieces can be taken
for stipulated test and necessary re-inspection.
In accordance with the stipulation in product standard or contract, the conditions of
sample can be divided into.
Rough specimen used in test under reference condition shall be prepared in
accordance with the following methods.
6 Test Piece Preparation
When thermal treatment under reference condition needs to be conducted on test
piece, the thermal treatment condition shall be the same as the requirement of rough
specimen [please refer to 5.3.3.2 b)].
......
Source: Above contents are excerpted from the full-copy PDF -- translated/reviewed by: www.ChineseStandard.net / Wayne Zheng et al.
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