YS/T 656-2015 English PDF (YST656-2015)

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YS/T 656-2015: Designation and composition of wrought niobium and niobium alloy
YS/T 656-2015
YS
NONFERROUS METAL INDUSTRY STANDARD
OF THE PEOPLE’S REPUBLIC OF CHINA
ICS 77.120.99
H 63
YS/T 656-2007
Designation and composition of
wrought niobium and niobium alloy
ISSUED ON. APRIL 30, 2015
IMPLEMENTED ON. OCTOBER 1, 2015
Issued by. Ministry of Industry and Information Technology of the
People’s Republic of China
Table of Contents
Foreword ... 3 
1 Scope ... 4 
2 Normative References ... 4 
3 Designations and chemical compositions ... 4 
4 Chemical composition analytical method ... 5 
Foreword
This Standard was drafted in accordance with the rules given in GB/T 1.1-2009.
This Standard replaces YS/T 656-2007, Designation and composition of wrought
niobium and niobium alloy.
Compared with YS/T 656-2007, the major changes of this Standard are as follows.
-- 3 designations and their requirements are added, including NbT, NbW5-1 and
NbW5-2;
-- the normative references are modified;
-- relevant specifications for other elements are modifies.
This Standard was proposed by and shall be under the jurisdiction of Technical 243 on
Nonferrous Metals of Standardization Administration of China (SAC/TC 243).
The drafting organizations of this Standard. Baoti Group Co., Ltd., Western Metal
Materials Co., Ltd., Baoji Titanium Industry Co., Ltd., Ningxia Orient Tantalum Industry
Co., Ltd., China Nonferrous Metal Industry Institute of Standards, Metrology and
Quality.
The main drafters of this Standard. Feng Junning, Ma Zhongxian, Li Xianjun, Bao
Hongjun, Hu Zhijie, Yang Rong, Bai Zhangjun, Yang Junhong, Wu Yanhua.
The previous edition of the standard replaced by this Standard is as follows.
-- YS/T 656-2007.
Designation and composition of
wrought niobium and niobium alloy
1 Scope
This Standard specifies the designation, chemical composition etc. of niobium and
niobium alloy.
This Standard applies to all types of wrought niobium and niobium alloy products
(including cast ingots and semi-finished products).
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 15076 (all parts), Methods for chemical analysis of tantalum and niobium
3 Designations and chemical compositions
3.1 Designations
The products are classified into 10 designations, including NbT, Nb1, Nb2, NbZr1,
NbZr2, FNb1, FNb2, NbHf10-1, NbW5-1 and NbW5-2.
3.2 Chemical compositions
The product designations and chemical compositions shall be as specified in Table 1.
3.3 Other elements
3.3.1 Other elements refer to the inherent microelements in the production of niobium
and niobium alloy, other than the elements artificially added.
3.3.2 Other elements generally include Cu, Ti, Ta, Fe, Si, W, Ni, Mo, Mn, Cr, Al, Hf,
S, P, Sn (excluding the alloy elements in designations). When the user has other
particular requirements, they shall be agreed on by both sides and indicated in order
(or contract).