BS-6200-3.21.1-1986 EN-10178-1989-EU-178-1985.pdf
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1、BRITISH STANDARD BS 6200-3.21.1: 1986 EN 10178: 1989 EU 178:1985 Incorporating Amendment No. 1Sampling and analysis of iron, steel and other ferrous metals Part 3: Methods of analysis Section 3.21 Determination of niobium Subsection 3.21.1 Steel: spectrophotometric method EU title: Chemical analysis
2、 of ferrous materials Determination of niobium in steels Spectrophotometric method The European Standard EN 10178:1989 has the status of a British Standard UDC 543.42.062:546.882:669.14 Licensed Copy: sheffieldun sheffieldun, na, Wed Dec 06 14:58:47 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 6200
3、-3.21.1:1986 This British Standard, having been prepared under the direction of the Iron and Steel Standards Committee, was published under the authority of the Board of BSI and comes into effect on 30 September 1986 BSI 09-1999 The following BSI references relate to the work on this standard: Commi
4、ttee reference ISM/18 Draft for comment 82/71477 DC ISBN 0 580 15336 3 National foreword This Subsection of BS 6200 has been prepared under the direction of the Iron and Steel Standards Committee. It is identical with Euronorm 178:1985 “Chemical analysis of ferrous materials. Determination of niobiu
5、m in steels. Spectrophotometric method” published by the Commission of the European Communities. In 1989 the European Committee for Standardization (CEN) accepted EU 178:1985 as European Standard EN 10178:1989. Cross-reference. The Technical Committee has reviewed the provisions of Euronorm 18, to w
6、hich reference is made in clause 6, and has decided that they are acceptable for use in conjunction with this standard. At present there is no corresponding British Standard for Euronorm 18. Appropriate procedures from Euronorm 18 will be incorporated in BS 6200-2 “Methods of sampling and sample pre
7、paration”, which will be published in due course. A British Standard does not purport to include all the necessary provisions of a contract. Users of British Standards are responsible for their correct application. Compliance with a British Standard does not of itself confer immunity from legal obli
8、gations. Summary of pages This document comprises a front cover, an inside front cover, pages i and ii, the EN title page, pages 2 to 6, an inside back cover and a back cover. This standard has been updated (see copyright date) and may have had amendments incorporated. This will be indicated in the
9、amendment table on the inside front cover. Amendments issued since publication Amd. No.Date of issueComments 7075February 1992Indicated by a sideline in the margin Licensed Copy: sheffieldun sheffieldun, na, Wed Dec 06 14:58:47 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 6200-3.21.1:1986 BSI 09-19
10、99i Contents Page National forewordInside front cover Brief history2 1Scope and field of application3 2Reference3 3Principle3 4Reagents3 5Apparatus3 6Sampling3 7Procedure3 8Expression of results5 9Test report5 Annex Precision data6 Publication referred toInside back cover Licensed Copy: sheffieldun
11、sheffieldun, na, Wed Dec 06 14:58:47 GMT+00:00 2006, Uncontrolled Copy, (c) BSI ii blank Licensed Copy: sheffieldun sheffieldun, na, Wed Dec 06 14:58:47 GMT+00:00 2006, Uncontrolled Copy, (c) BSI EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN 10178 January 1989 UDC 543.42.062:546.882:669.14 De
12、scriptors: Iron and steel products, chemical analysis, determination of content, niobium, spectrophotometric analysis English version Chemical analysis of ferrous materials Determination of niobium in steels Spectrophotometric method Analyse chimique sidrurgiques Dosage du niobium dans les aciers Mt
13、hode spectrophotomtrique Chemische analyse von Eisenwerk-stoffen Bestimmung von Niob in Sthlen Photometrisches Verfahren This European Standard was approved by CEN on 1989-01-15. CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this
14、European Standard the status of a national standard without any alteration. Up-to-date lists and bibliographical references concerning such national standards may be obtained on application to the Central Secretariat or to any CEN member. This European Standard exists in three official versions (Eng
15、lish, French, German). A version in any other language made by translation under the responsibility of a CEN member into its own language and notified to the Central Secretariat has the same status as the official versions. CEN members are the national standards organizations of Austria, Belgium, De
16、nmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and United Kingdom. CEN European Committee for Standardization Comit Europen de Normalisation Europisches Komitee fr Normung Central Secretariat: rue de Stassart 36
17、, B-1050 Brussels CEN 1989 Copyright reserved to all CEN members Ref. No. EN 10178:1989 E Licensed Copy: sheffieldun sheffieldun, na, Wed Dec 06 14:58:47 GMT+00:00 2006, Uncontrolled Copy, (c) BSI EN 10178:1989 BSI 09-1999 2 Brief history This European Standard takes over the content of EURONORM 178
18、:1985 “Chemical analysis of ferrous materials Determination of niobium in steels Spectrophotometric method”, prepared by ECISS/TC 20 “Methods of chemical analysis”, the Secretariat of which is allocated to the Dansk Standardiseringsrad (DS). It has been submitted to the CEN Formal Vote following the
19、 decision of the Coordinating Commission (COCOR) of the European Committee for Iron and Steel Standardization on 1987-11-24/25. It has been adopted and ratified by CEN BT on 1988-11-05. According to the Common CEN/CENELEC Rules, the following countries are bound to implement this European Standard:
20、Austria, Belgium, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and United Kingdom. Note in clauses 1 and 9 EURONORM shall read EUROPEAN STANDARD. Licensed Copy: sheffieldun sheffieldun, na, Wed Dec 06 14:58:
21、47 GMT+00:00 2006, Uncontrolled Copy, (c) BSI EN 10178:1989 BSI 09-19993 1 Scope and field of application This EURONORM specifies a method for the spectrophotometric determination of niobium in steels. The method is applicable to all types of steels with niobium contents up to 1.3 % (m/m), with a lo
22、wer detection limit of 0.002 % (m/m). 2 Reference EURONORM 18, Selection and preparation of samples and test pieces for steel and iron and steel products. 3 Principle Dissolution of a test portion with hydrochloric acid followed by oxidation with hydrogen peroxide. Precipitation of niobium and tanta
23、lum with phenylarsonic acid using zirconium as a carrier. Formation of a complex of niobium with 4-(2-pyridylazo)-resorcinol (PAR) in a buffered sodium tartrate medium. Spectrophotometric measurement of the coloured compound at a wavelength of 550 nm. 4 Reagents During the analysis, use only reagent
24、s of recognized analytical quality and only distilled water or water of equivalent purity. 4.1 Iron, of high purity, free from niobium 4.2 Potassium hydrogen sulphate (KHSO4) 4.3 Hydrochloric acid, 1.19 g/ml approximately, (12 mol/l approximately) 4.4 Hydrochloric acid, 1.19 g/ml approximately, dilu
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