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GB/T 35840.1-2018

Chinese Standard: 'GB/T 35840.1-2018'
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Detail Information of GB/T 35840.1-2018; GB/T35840.1-2018
Description (Translated English): Steels for plastic mould--Part 1: Non-alloy steels
Sector / Industry: National Standard (Recommended)
Classification of Chinese Standard: H40
Classification of International Standard: 77.140.35
Word Count Estimation: 10,154
Date of Issue: 2018-02-06
Date of Implementation: 2018-11-01
Drafting Organization: Jiangsu Shagang Group Co., Ltd., Fushun Special Steel Co., Ltd., Steel Research Institute, Metallurgical Industry Information Standards Institute, Tangshan Wenfeng Shanchuan Wheel Hub Co., Ltd., Tianjin Iron and Steel Group Co., Ltd., Tangshan Zhiwei Technology Co., Ltd., Jiangsu Yonggang Group Limited company
Administrative Organization: National Steel Standardization Technical Committee (SAC/TC 183)
Proposing organization: China Iron and Steel Association
Issuing agency(ies): General Administration of Quality Supervision, Inspection and Quarantine of the People's Republic of China, China National Standardization Administration

GB/T 35840.1-2018
GB
NATIONAL STANDARD OF THE
PEOPLE’S REPUBLIC OF CHINA
ICS 77.140.35
H 40
Steels for plastic mould – Part 1. Non-alloy steels
塑料模具 第 1 部分. 非合金钢
ISSUED ON. FEBRUARY 6, 2018
IMPLEMENTED ON. NOVEMBER 1, 2018
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 Ordering content ... 5 
4 Dimension, shape and weight ... 6 
5 Technical requirements ... 6 
6 Test methods ... 9 
7 Inspection rules ... 10 
8 Packaging, marking and quality certification ... 11 
Annex A (Informative) Table of cross-references between the similar
designations of this Part and relevant domestic-overseas standards ... 12 
Foreword
GB/T 35840, Steels for plastic mould, comprises 4 parts.
-- Part 1. Non-alloy steels;
-- Part 2. Pre-hardened steel bars;
-- Part 3. Corrosion-resistant steels;
-- Part 4. Pre-hardened steel plates (sheets).
This Part is Part 1 of GB/T 35840.
This Part was drafted in accordance with the rules given in GB/T 1.1-2009.
This Part was proposed by China Iron and Steel Association.
This Part shall be under the jurisdiction of Technical Committee 183 of Standardization
Administration of China (SAC/TC 183).
The drafting organizations of this Part. Jiangsu Shagang Group Co., Ltd., Fushun
Special Steel Shares Co., Ltd., Central Iron and Steel Research Institute, China
Metallurgical Information and Standardization Institute, Hebei Wenfeng Industrial
Group Co., Ltd., Tianjin Iron and Steel Group Co., Ltd., Tangshan Zwell Technology
Co., Ltd., Jiangsu Yonggang Group Co., Ltd.
The main drafters of this Part. Li Xiaobo, Guo Tong, Li Yuzang, Kang Aijun, Ma
Dangshen, Yan Chengming, Li Jianli, Xin Haixi, Cao Lijun, Liu Shaokang, Luan Yan,
Gu Qiang, Chi Hongxiao, Liu Ming, Wang Peixin.
Steels for plastic mould – Part 1. Non-alloy steels
1 Scope
This Part of GB/T 35840 specifies the ordering content, dimensions, shape, weight,
technical requirements, test methods, inspection rules, packaging, marking and quality
certificate for non-alloy steels for plastic mould.
This Part applies to hot-rolled or forged non-alloy round steel, square steel, flat steel
and steel plates (sheets) for the manufacture of plastic mould.
2 Normative References
The following referenced documents are indispensable for the application of this
document. For dated references, only the edition dated applies to this document. For
undated references, the latest edition of the referenced documents (including all
amendments) applies to This Standard.
GB/T 223.5, Steel and iron - Determination of acid-soluble silicon and total silicon
content - Reduced molybdosilicate spectrophotometric method
GB/T 223.11, Iron, steel and alloy - Determination of chromium content - Visual
titration or potentiometric titration method
GB/T 223.18, Methods for chemical analysis of iron, steel and alloy - The sodium
thiosulfate separation iodimetric method for the determination of copper content
GB/T 223.23, Iron, steel and alloy - Determination of nickel content - The
dimethylglyoxime spectrophotometric method
GB/T 223.62, Methods for chemical analysis of iron, steel and alloy - The butyl
acetate extraction photometric method for the determination of phosphorus content
GB/T 223.64, Iron, steel and alloy - Determination of manganese content - Flame
atomic absorption spectrometric method
GB/T 223.72, Iron, steel and alloy - Determination of sulfur content - Gravimetric
method
GB/T 223.86, Steel and iron - Determination of total carbon content - Infrared
absorption method after combustion in an induction furnace
GB/T 226, Test method for macrostructure and defect of steel by etching
GB/T 231.1, Metallic materials - Brinell hardness test - Part 1. Test method
GB/T 247, General rule of package mark and certification for steel plates (sheets)
and strips
GB/T 709, Dimension, shape, weight and tolerances for hot rolled sheets and strips
GB/T 1299-2014, Tool and mould steels
GB/T 1979, Standard diagrams for macrostructure and defect of structural steels
GB/T 2101, General requirement of acceptance packaging, marking and
certification for section steel
GB/T 2970-2016, Method for ultrasonic testing of thicker steel plates
GB/T 2975, Steel and steel products - Location and preparation of test pieces for
mechanical testing
GB/T 4336, Carbon and low-alloy steel - Determination of multi-element contents -
Spark discharge atomic emission spectrometric method (routine method)
GB/T 6402, Steel forgings - Method for ultrasonic testing
GB/T 8170, Rules of rounding off for numerical values and expression and
judgement of limiting values
GB/T 10561-2005, Steel - Determination of content of nonmetallic inclusions -
Micrographic method using standards diagrams
GB/T 17505, Steel and steel products - General technical delivery requirements
GB/T 20066, Steel and iron - Sampling and preparation of samples for the
determination of chemical composition
GB/T 20123, Steel and iron - Determination of total carbon and sulfur content
Infrared absorption method after combustion in an induction furnace (routine
method)
3 Ordering content
The contract or order for the ordering of steels in accordance with this Part shall at
least include the following content.
a) number of this Part;
b) product name;
c) designation (see 5.1);
4 Macrostructure
Round steel,
square steel and
flat steel
2 pcs/batch
Different
pieces of
steels
GB/T 226, Annex A to
GB/T 1299-2014 or
GB/T 1979
5 Non-metallic inclusion
Round steel,
square steel and
flat steel
2 pcs/batch
Different
pieces of
steels Method A of GB/T
10561-2005
Steel plates
(sheets) 1 pc/batch
Any piece of
steel plates
(sheets)
6 Dimension and shape Each pc -
Measuring tools which
meet accuracy
requirements
7 Surface quality Each pc - Visual inspection and measuring tools
6.2 The chemical composition of steels is analyzed in accordance with GB/T 4336,
GB/T 20123 or general test methods, but it shall be carried out during arbitration in
accordance with GB/T 223.5, GB/T 223.11, GB/T 223.18, GB/T 223.23, GB/T 223.62,
GB/T 223.64, GB/T 223.72 and GB/T 223.86.
7 Inspection rules
7.1 Inspection and acceptance
The quality inspection and acceptance of steels is the responsibility of the quality
supervi......
Related standard:   GB/T 35840.2-2018  GB/T 35840.3-2018
   
 
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