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GB/T 11351-2017 English PDF (GBT11351-2017)

GB/T 11351-2017 English PDF (GBT11351-2017)

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GB/T 11351-2017: Mass tolerances of casting

This standard specifies the terms and definitions, basic principles, marking methods, inspection methods of mass tolerances of castings. This standard applies to castings as produced by various casting methods.
GB/T 11351-2017
NATIONAL STANDARD OF THE
PEOPLE 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).
2.3
Mass tolerance grade
The level of mass tolerance of casting.
2.4
Actual mass
The measured mass of the casting being tested.

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