GB/T 11351-2017 PDF English
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| Standard ID | Contents [version] | USD | STEP2 | [PDF] delivery | Name of Chinese Standard | Status |
| GB/T 11351-2017 | English | 100 |
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Mass tolerances of casting
| Valid |
| GB/T 11351-1989 | English | 159 |
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Mass tolerances for castings
| Obsolete |
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GB/T 11351-2017: Mass tolerances of casting---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/GBT11351-2017
NATIONAL STANDARD OF THE
PEOPLE’S REPUBLIC OF CHINA
ICS 77.140.80
J 31
Replacing GB/T 11351-1989
Mass tolerances of casting
Issued on. NOVEMBER 01, 2017
Implemented on. MAY 01, 2018
Issued by. General Administration of Quality Supervision, Inspection and
Quarantine;
Standardization Administration of PRC.
Table of Contents
Foreword... 3
1 Scope... 4
2 Terms and definitions... 4
3 Basic principles... 5
4 Indication method... 6
5 Inspection methods... 6
Appendix A (Informative) Mass tolerance level of castings produced in small
batch and single piece... 8
Appendix B (Informative) Mass tolerance level of castings produced in batches
or mass-produced... 9
Foreword
This standard was drafted in accordance with the rules given in GB/T 1.1-2009.
This standard replaces GB/T 11351-1989 "Mass tolerance of casting".
Compared with GB/T 11351-1989, the main technical contents of this standard
are as follows.
- MODIFY the terms and definitions;
- MODIFY the method of determining the nominal mass of castings;
- MODIFY the selection rules of mass tolerance of casting;
- MODIFY the value of mass tolerance of casting;
- ADD Appendix A and Appendix B.
This standard was proposed by and shall be under the jurisdiction of the
National Foundry Standardization Technical Committee (SAC/TC 54).
Responsible drafting organizations of this standard. Shenyang Foundry
Research Institute, Anhui Mechanical Science Research Institute.
Participated drafting organizations of this standard. Anhui Excalibur Technology
Co., Ltd., Anhui Hualing Western Kitchen Equipment Co., Ltd., Anhui Yingliu
Group Huoshan Casting Co., Ltd., CITIC Dicastal Co., Ltd., Tianrun Crankshaft
Co., Ltd., Zhejiang Terry Heavy Machinery Co., Ltd., Cixi Huili
Electromechanical Co., Ltd., Hebei Jianzhi Casting Group Co., Ltd., Maanshan
Haitian Heavy Industry Technology Development Co., Ltd., Dongfeng Precision
Casting Co., Ltd., Jiangxi Zhangshu Fuling Internal Combustion Engine Parts
Co., Ltd., Taiyuan University of Technology.
The main drafters of this standard. Zhang Yin, Ding Chuanhai, Pei Bing, Xu
Zhenghua, Du Yingliu, Shu Xuecheng, Alateng, Wang Ji, Cong Jianchen, Shao
Shibo, Zhou Hongwei, Luo Yu, Ren Jiuhong, Li Guolin, Sun Aimin, Ma Bo, Chen
Tao, Wang Rongfeng.
This standard replaces the standard previously issued as follows.
- GB/T 11351-1989.
Mass tolerances of casting
1 Scope
This standard specifies the terms and definitions, basic principles, marking
methods, inspection methods of mass tolerances of castings (hereinafter
referred to as mass tolerances).
This standard applies to castings as produced by various casting methods.
2 Terms and definitions
The following terms and definitions apply to this document.
2.1
Nominal mass of casting
The mass as calculated according to the casting chart or the mass of the
casting that is qualified by both the supplier and the buyer or the reference
mass of the casting to be determined according to a certain method,
including the amount of variation in the casting mass as caused by such
factors as casting’s machining allowance and other process allowances.
2.2
Mass tolerance of casting
The ratio of the difference between the actual mass of the casting and the
nominal mass to the nominal mass of the casting (expressed as a
percentage).
3 Basic principles
3.1 Grade and code of mass tolerance
The code for the mass tolerance is indicated by the letters "MT" 1). The mass
tolerance is divided into 16 levels, that is, MT1 to MT16.The mass tolerance’s
levels are listed in Table 1.
3.2 Determination of the nominal mass of casting
3.3 Selection of mass tolerance
3.3.1 Corresponding to a certain mass tolerance level, the mass tolerance value
shall be selected from Table 1 according to the range of the nominal mass.
1 The letter "MT" is an abbreviation for the English "Mass tolerance". The mass tolerance level
corresponds to the dimensional tolerance level.
4 Indication method
4.1 When the mass tolerance of the casting is used as the basis for acceptance,
it shall be indicated in the drawings or technical documents.
4.2 When the mass tolerance is symmetrical tolerance, it is marked as. GB/T
11351 MT 10.
5 Inspection methods
5.1 The inspection method for the mass tolerance of castings adopts the
weighing method. The nominal mass of the casting and the mass of the casting
Appendix A
(Informative)
Mass tolerance level of castings produced in small batch and single
piece
Appendix B
(Informative)
Mass tolerance level of castings produced in batches or mass-produced
See Table B.1.
......
Source: Above contents are excerpted from the full-copy PDF -- translated/reviewed by: www.ChineseStandard.net / Wayne Zheng et al.
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