Valid

GB/T 6896-2007Niobium bars (English PDF)

铌条

Preview PDF

This is a limited preview

Buy now to download the full PDF (15 pages)

Need quotation for your management?

Get a formal quotation for GB/T 6896-2007 in 30 minutes.

Issued by

SAMR; SAC

Level / Type

National · Recommended

Issue date

November 23, 2007

Implementation date

June 1, 2008

Scope

GB/T 6896-2007 is the English-translated version of 铌条.

This standard fixes the requirements, test methods and inspection rules for niobium bars, together with the marking, packaging, transport and storage of the product and the content of the purchase order or contract.

Clause 1 says the standard applies to material obtained by carbon thermal reduction, which the draft calls niobium strip in that line and niobium bars in the title, and that the product serves to make niobium powder, superconducting materials and high temperature alloy additives among other uses; the end of that sentence is garbled in the draft and is left out here.

The draft prints clause 1 Scope, clause 2 Normative references and clause 3 Requirements, and breaks off inside clause 3.

Subclause 3.1 Categories divides the product by chemical composition into the two grades TNb1 and TNb2, 3.2 refers the chemical composition of both grades to Table 1, which gives the maximum impurity content of each, and 3.3 to 3.5 require a length of not less than 300 mm, which may be cut to the user requirement, a product cross section of not less than 14 mm by 14 mm, a lengthwise deflection of not more than 1 % and a product free of surface oxidation, carburization and bubbling.

Clause 2 cites GB/T 15076 (all parts), chemical analysis of tantalum and niobium. The foreword records that the revision cancelled the Nb-2 grade and turned the Nb-01 and Nb-1 grades into TNb1 and TNb2, with the impurity limits of the two grades adjusted.

It was proposed by China Nonferrous Metals Industry Association, drafted under the responsibility of Zhuzhou Cemented Carbide Group Co., Ltd. and drafted with the participation of Ningxia Orient Tantalum Industry Co., Ltd. It replaces GB/T 6896-1998, was issued on 23 November 2007 and has applied since 1 June 2008.

Found what you need?

Document preview — GB/T 6896-2007

National Standard of the People's Republic of China

ICS: 77.150.99
Classification: H 63
Replacing: GB/T 6896-1998

Issued by: State Administration for Market Regulation; Standardization Administration of the PRC

Foreword
1 Scope
2 Normative references
3 Requirements

Foreword

This standard replaces GB/T 6896-1998 "niobium bar."

This standard compared with GB/T 6896-1998, the main changes are as follows.

--- Canceled Nb-2 grades;

--- The Nb-01, Nb-1 grades to TNb1, TNb2, while this part of the impurities in two grades were adjusted.

The standard proposed by China Nonferrous Metals Industry Association.

This standard Nonferrous Metals by the National Standardization Technical Committee.

This standard by Zhuzhou Cemented Carbide Group Co., Ltd. is responsible for drafting.

This standard by the Ningxia Orient Tantalum Industry Co., Ltd. participated in the drafting.

1 Scope

This standard specifies the requirements, test methods, inspection rules of the niobium, signs, packaging, transportation, storage, and purchase order (or contract) content.

This standard applies to Carbon Thermal Reduction of niobium strip. Products for the production of niobium powder, superconducting materials, high temperature alloy additives and electronics boom Click melting Nb and Nb alloy ingots and other purposes.

2 Normative references

The following documents contain provisions which, through reference in this standard and become the standard terms. For dated references, subsequent Amendments (not including errata content) or revisions do not apply to this standard, however, encourage the parties to the agreement are based on research Whether the latest versions of these documents. For undated reference documents, the latest versions apply to this standard.

GB/T 15076 (all parts), chemical analysis of tantalum and niobium

3 Requirements

3.1 Categories

According to the chemical composition of different products, divided into TNb1, TNb2 two grades.

3.2

All grades shall conform to the chemical composition of the product specified in Table 1.

3.3

Length not less than 300mm (according to user requirements can be cut), product cross-sectional dimensions of not less than 14mm x 14mm.

3.4

In the lengthwise direction of the deflection is not more than 1%.

3.5

Products may not have surface oxidation, carburization, bubbling and contamination-free sandwich section.

......
This preview omits tables, figures, formulas and parts of the technical clauses. The complete document — 15 pages — is available in the English PDF.

Referenced standards

Normative references

GB/T 15076

Cited by

Similar standards

GB/T 10575-2026|GB/T 26020-2026|GB/T 26308-2026|GB/T 47107-2026|GB/T 47603-2026|GB/T 5149-2026

Editions of GB/T 6896

Edition	Title	Revision	Status
GB/T 6896-2007	Niobium bars	current edition	Current
GB/T 6896-1998	Niobium bars	previous edition	Superseded

This page sells the current edition, GB/T 6896-2007. Earlier editions are listed for reference only.

How to Download GB/T 6896-2007

1
Add to cart
Click "Download PDF" on this page and choose "Buy this standard". You can add more standards before checkout.
2
Checkout
Enter your email and billing details. Payment is processed securely by Stripe (cards or bank transfer). Prefer bank details? Request a quotation (min. order $300).
3
Instant delivery (0–9 sec)
Delivery is automatic: within seconds of payment you'll receive an email with a secure download link. The link stays valid for 72 hours.
4
Invoice included
A tax invoice is attached to the confirmation email. Need a custom invoice? Contact us.