GB/T 14842-2007 English PDF

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GB/T 14842-2007: Niobium and niobium alloys rods and bars
Status: Valid

GB/T 14842: Historical versions

Standard ID	USD	BUY PDF	Lead-Days	Standard Title (Description)	Status
GB/T 14842-2007	209	Add to Cart	3 days	Niobium and niobium alloys rods and bars	Valid
GB/T 14842-1993	279	Add to Cart	3 days	Niobium rods and bars	Obsolete

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Basic data

Standard ID: GB/T 14842-2007 (GB/T14842-2007)
Description (Translated English): Niobium and niobium alloys rods and bars
Sector / Industry: National Standard (Recommended)
Classification of Chinese Standard: H63
Classification of International Standard: 77.150.99
Word Count Estimation: 8,825
Date of Issue: 2007-11-23
Date of Implementation: 2008-06-01
Older Standard (superseded by this standard): GB/T 14842-1993
Quoted Standard: GB/T 228; GB/T 15076; YS/T 656
Adopted Standard: ASTM B392-2003, NEQ
Regulation (derived from): China National Standard Approval Announcement2007 No.12 (Total No.112)
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 niobium and niobium alloy rods requirements, test methods, inspection rules and signs, storage and order form content, transport, packaging. This standard applies to the rule of the ingot or billet extruded powder, forging, rolling, stretching process to produce niobium and niobium alloy round bar and square bar.

GB/T 14842-2007: Niobium and niobium alloys rods and bars

---This is a DRAFT version for illustration, not a final translation. Full copy of true-PDF in English version (including equations, symbols, images, flow-chart, tables, and figures etc.) will be manually/carefully translated upon your order.
Niobium and niobium alloys rods and bars ICS 77.150.99 H63 National Standards of People's Republic of China Replacing GB/T 14842-1993 Niobium and niobium alloy bars Posted 2007-11-23 2008-06-01 implementation Administration of Quality Supervision, Inspection and Quarantine of People's Republic of China Standardization Administration of China released

Foreword

This standard replaces GB/T 14842-1993 "niobium rod." At the time of revision with reference to the United States ASTMB392-03 "niobium and niobium alloy bars, rods, wire specifications." This standard compared with GB/T 14842-1993, the main changes are as follows. --- Changed to "niobium and niobium alloy bars," according to the content change the standard name; --- Increase the stretch in the scope of the production process; --- Table 1, delete the "method of making" column, the length of the rod is given only limit requirements; --- Of bars specifications were revised; --- Increased NbZr1, NbZr2, NbHf10-1 three niobium alloy grades and requirements; --- Remove the cap requirements annealed rod length; --- Remove the chemical composition table, a direct reference to YS/T 656 "niobium and niobium alloy processing product grades and chemical composition"; --- Increasing the test results to determine; --- Increased orders content, format and standard made editorial changes. The standard proposed by China Nonferrous Metals Industry Association. This standard Nonferrous Metals by the National Standardization Technical Committee. This standard by the Baoji Titanium Group Ltd. and Baoji Titanium Industry Co., Ltd. is responsible for drafting. This standard by Western Metal Materials Co., Ltd. participated in the drafting. The main drafters of this standard. Fengjun Ning, Huang Yongguang, Jiang Bin, Wang Dingchun, Lixian Jun, Yang Jun Hong, Zhang Xianming. This standard replaces the standards previously issued as follows. --- GB/T 14842-1993. Niobium and niobium alloy bars

1 Scope

This standard specifies the niobium and niobium alloy rod requirements, test methods, inspection rules and signs, packaging, transportation, storage and purchase order (or close Same) content. This standard applies to the rule of the ingot or powder strip billet extrusion, forging, rolling, drawing and other craft production of niobium and niobium alloy rod and square bar.

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 228 metal materials at room temperature tensile test method GB/T 15076 (all parts), chemical analysis of tantalum and niobium YS/T 656 niobium and niobium alloy grades and chemical composition of processed products

3 Requirements

3.1 Categories 3.1.1 grade, status, specifications Rod grades, status, and must also comply with the provisions in Table 1. Table 1 millimeters Grade Supply status in diameter or length of a side length of a Nb1 Nb2 NbZr1 NbZr2 Cold state (Y) Thermal processing state (R) Annealed (M) 3.0 ~ 80 ≥500 FNb1 FNb2 Cold state (Y) Annealed (M) 3.5 to 5.0 > 5.0 to 12 ≥500 ≥300 NbHf10-1b Cold state (Y) Annealed (M) 20 ~ 2000 ~ 80500 a forged square bar side length of not less than 25mm, a length of not more than 4000mm. b NbHf10-1 alloy rod only. 3.1.2 tag example In accordance with the standard production of niobium and niobium alloy bars mark shall meet the following requirements for example. Example 1. Nb1 manufacturing, hot extrusion state, a diameter of 30mm, a length of 500mm rod is marked. Crowded bar Nb1R 30 × 500 GB/T 14842-2007 Example 2. manufactured by Nb1, annealed, diameter of 10mm, a length of 700mm forging polished rod is marked. Forging rod mill Nb1M 10 × 700 GB/T 14842-2007 Example 3. Nb1 manufacturing, annealed, side length of 25mm, a length of 500mm forged square bar marked as follows. Forged rods Nb1M 25 × 25 × 500 GB/T 14842-2007 ......

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