YS/T 656-2015Designation and composition of wrought niobium and niobium alloy (English PDF)

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.

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