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GB/T 31978-2015 English PDF

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GB/T 31978-2015: Cerium metal
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Basic data

Standard ID GB/T 31978-2015 (GB/T31978-2015)
Description (Translated English) Cerium metal
Sector / Industry National Standard (Recommended)
Classification of Chinese Standard H65
Classification of International Standard 77.120.99
Word Count Estimation 6,613
Date of Issue 2015-09-11
Date of Implementation 2016-08-01
Quoted Standard GB/T 8170; GB/T 12690; GB/T 14635; GB/T 17803; GB/T 18115.2
Regulation (derived from) National Standard Announcement 2015 No.25
Issuing agency(ies) General Administration of Quality Supervision, Inspection and Quarantine of the People's Republic of China, Standardization Administration of the People's Republic of China
Summary This Standard specifies the metal cerium requirements, test methods, inspection rules and packaging, labeling, transportation, storage and quality certificate. This Standard applies to by molten salt electrolysis method were for rare earth magnetic materials, rare earth hydrogen storage alloys, special steels and non-ferrous metal alloys and other additives used in metal cerium.

GB/T 31978-2015: Cerium metal

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(Metal cerium) ICS 77.120.99 H65 National Standards of People's Republic of China Metal cerium Ceriummetal Issued on. 2015-09-11 2016-08-01 implementation Administration of Quality Supervision, Inspection and Quarantine of People's Republic of China Standardization Administration of China released

Foreword

This standard was drafted in accordance with GB/T 1.1-2009 given rules. This standard by the National Standardization Technical Committee of rare earth (SAC/TC229) and focal points. This standard is mainly drafted by. Qiandong Rare Earth Group Co., Ltd., Baotou Rare Earth Research Institute, Jiangxi Golden Century Advanced Materials Co. Shares Company Institute of Rare Earth New Materials Co., Ltd. The main drafters of this standard. Gong Bin, double Cai, Hu Limin, Nam Hung Yao Wen Bin, Zeng Haiyan, Wang Xiaoqing, Xie Ping, Liu Jiangang, Chen Xiaohong, Paragraph soldiers, flower Tian Rong, Xu Lihai, Luan Chau. Metal cerium

1 Scope

This standard specifies the metal cerium requirements, test methods, inspection rules and packaging, labeling, transportation, storage and quality certificate. This standard applies to by molten salt electrolysis method were for rare earth magnetic materials, rare earth hydrogen storage alloys, special steels and non-ferrous alloys to add And the like with a metal cerium.

2 Normative references

The following documents for the application of this document is essential. For dated references, only the dated version suitable for use herein Member. For undated references, the latest edition (including any amendments) applies to this document. GB/T 8170 repair value expressed about the rules and limit values \u200b\u200band judgment GB/T 12690 non - rare earth impurities in rare earth metals and their oxides chemical analysis methods Determination of GB/T 14635 method for chemical analysis of rare earth metals and rare earth compound total GB/T 17803 grades representation of rare earth products GB/T 18115.2 rare earth metals and oxides of rare earth impurities in chemical analysis methods of lanthanum, cerium, praseodymium, neodymium, samarium, europium, gadolinium, terbium, Dysprosium, holmium, erbium, thulium, ytterbium, lutetium and yttrium content

3 Requirements

3.1 Categories Products according to chemical composition divided into Ce-3NA, Ce-3NB, Ce-2N5A, Ce-2N5B, Ce-2NA, Ce-2NB six grades, Grades Representation shall comply with GB/T 17803 of. 3.2 Chemical composition Chemical composition of the product shall comply with the requirements of Table 1. For parties of products with special requirements, can be negotiated to determine the supply and demand sides. Table 1 Grades Character grade Corresponding to the original number Word grades Chemical composition (mass fraction) /% RE not less than Ce/RE not less than Ce Impurity content of not more than Rare earths Impurity Non-rare earth impurities Fe Si Al Ca Mg CS Mo W Ce-3NA 24030A 99.0 99.9 0.1 0.10 0.02 0.05 margin 0.01 0.01 0.03 0.02 0.1 Ce-3NB 24030B 99.0 99.9 margin 0.05 0.05 0.01 0.01 0.1 0.10 0.05 0.02 0.1 Ce-2N5A 24025A 99.0 99.5 0.5 0.15 0.03 0.05 0.02 margin 0.01 0.03 0.02 0.1 Ce-2N5B 24025B 99.0 99.5 margin 0.05 0.05 0.02 0.01 0.5 0.15 0.05 0.02 0.1

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