BS EN ISO 10720-2007 Steel and iron - Determination of nitrogen content - Thermal conductimetric method after fusion in a current of inert gas《钢和生铁 氮含量的测定 惰性气体熔融热导法》.pdf
《BS EN ISO 10720-2007 Steel and iron - Determination of nitrogen content - Thermal conductimetric method after fusion in a current of inert gas《钢和生铁 氮含量的测定 惰性气体熔融热导法》.pdf》由会员分享,可在线阅读,更多相关《BS EN ISO 10720-2007 Steel and iron - Determination of nitrogen content - Thermal conductimetric method after fusion in a current of inert gas《钢和生铁 氮含量的测定 惰性气体熔融热导法》.pdf(16页珍藏版)》请在麦多课文档分享上搜索。
1、BRITISH STANDARD BS EN ISO 10720:2007 Steel and Iron - Determination of nitrogen content - Thermal conductimetric method after fusion in a current of inert gas (ISO 10720:1997) ICS 77.080.01 Licensed Copy: Wang Bin, ISO/EXCHANGE CHINA STANDARDS, 29/10/2009 06:08, Uncontrolled Copy, (c) BSIBS EN ISO
2、10720:2007 This British Standard, having been prepared under the direction of the Engineering Sector Board, was published under the authority of the Standards Board and comes into effect on 15 December 1997 2009 BSI ISBN 978 0 580 68261 2 National foreword This British Standard is the UK implementat
3、ion of EN ISO 10720:2007. It is identical with ISO 10720:1997. It supersedes BS 6200-3.22.4:1997 The UK participation in its preparation was entrusted to Technical Committee ISE/18, Sampling and analysis of iron and steel. 30 June 2009 BS EN ISO 10720:2007 This corrigendum renumbers BS 6200-3.22.4.1
4、997 as which is withdrawn.A list of organizations represented on this committee can be obtained on request to its secretary. This publication does not purport to include all the necessary provisions of a contract. Users are responsible for its correct application. Compliance with a British Standard
5、cannot confer immunity from legal obligations. Amendments/corrigenda issued since publication Date Comments Licensed Copy: Wang Bin, ISO/EXCHANGE CHINA STANDARDS, 29/10/2009 06:08, Uncontrolled Copy, (c) BSIEUROPEANSTANDARD NORMEEUROPENNE EUROPISCHENORM ENISO10720 March2007 ICS77.080.01 EnglishVersi
6、on SteelandironDeterminationofnitrogencontentThermal conductimetricmethodafterfusioninacurrentofinertgas(ISO 10720:1997) AciersetfontesDosagedelazoteMthodepar conductibilitthermiqueaprsfusiondansuncourantde gazinerte(ISO10720:1997) EisenundStahlBestimmungdesStickstoffgehaltes MessungderWrmeleitfhigk
7、eitnachAufschmelzenin strmendemInertgas(ISO10720:1997) ThisEuropeanStandardwasapprovedbyCENon24February2007. CENmembersareboundtocomplywiththeCEN/CENELECInternalRegulationswhichstipulatetheconditionsforgivingthisEuropean Standardthestatusofanationalstandardwithoutanyalteration.Uptodatelistsandbiblio
8、graphicalreferencesconcerningsuchnational standardsmaybeobtainedonapplicationtotheCENManagementCentreortoanyCENmember. ThisEuropeanStandardexistsinthreeofficialversions(English,French,German).Aversioninanyotherlanguagemadebytranslation undertheresponsibilityofaCENmemberintoitsownlanguageandnotifiedt
9、otheCENManagementCentrehasthesamestatusasthe officialversions. CENmembersarethenationalstandardsbodiesofAustria,Belgium,Bulgaria,Cyprus,CzechRepublic,Denmark,Estonia,Finland, France,Germany,Greece,Hungary,Iceland,Ireland,Italy,Latvia,Lithuania,Luxembourg,Malta,Netherlands,Norway,Poland,Portugal, Rom
10、ania,Slovakia,Slovenia,Spain,Sweden,SwitzerlandandUnitedKingdom. EUROPEAN COMMITTEE FOR STANDARDIZATION COMIT EUROPEN DE NORMALISATION EUROPISCHES KOMITEE FR NORMUNG ManagementCentre:ruedeStassart,36B1050Brussels 2007CEN Allrightsofexploitationinanyformandbyanymeansreserved worldwideforCENnationalMe
11、mbers. Ref.No.ENISO10720:2007:E Licensed Copy: Wang Bin, ISO/EXCHANGE CHINA STANDARDS, 29/10/2009 06:08, Uncontrolled Copy, (c) BSIBS EN ISO 10720:2007 ii Foreword The text of ISO 10720:1997 has been prepared by Technical Committee ISO/TC 17 “Steel” of the International Organization for Standardizat
12、ion (ISO) and has been taken over as EN ISO 10720:2007 by Technical Committee ECISS/TC 20 “Methods of chemical analysis of ferrous products” the secretariat of which is held by SIS. This European Standard shall be given the status of a national standard, either by publication of an identical text or
13、 by endorsement, at the latest by September 2007, and conflicting national standards shall be withdrawn at the latest by September 2007. According to the CEN/CENELEC Internal Regulations, the national standards organizations of the following countries are bound to implement this European Standard: A
14、ustria, Belgium, Bulgaria, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom. Endorsemen
15、t notice The text of the International Standard ISO 10720:1997 has been approved by CEN as EN ISO 10720:2007 without any modification. Licensed Copy: Wang Bin, ISO/EXCHANGE CHINA STANDARDS, 29/10/2009 06:08, Uncontrolled Copy, (c) BSIBS EN ISO 10720:2007 iii Contents Page National foreword Inside fr
16、ont cover Foreword ii 1 Scope 1 2 Normative references 1 3 Principle 1 4 Reagents and materials 1 5 Apparatus 1 6 Sampling 2 7 Procedure 2 8 Expression of results 3 9 Test report 4 Annex A (informative) Features of commercial resistive electrode furnaces and nitrogen analysers 6 Annex B (informative
17、) Additional information on the international cooperative tests 6 Annex C (informative) Graphical representation of precision data 9 Figure C.1 Logarithmic relationship between nitrogen content and repeatability limit (r) or reproducibility limits (R and R w ) 9 Table 1 Standard solutions 2 Table 2
18、Calibration solutions, nitrogen contents up to 0,10 % (m/m) 4 Table 3 Calibration solutions, nitrogen contents between 0,10 % (m/m) and 0,50 % (m/m) 4 Table 4 Results for repeatability and reproducibility limits 5 Table B.1 Test samples used in the interlaboratory tests 7 Table B.2 The results obtai
19、ned in interlaboratory tests 8 (w N ) Licensed Copy: Wang Bin, ISO/EXCHANGE CHINA STANDARDS, 29/10/2009 06:08, Uncontrolled Copy, (c) BSIBS EN ISO 10720:2007 1 1 Scope This International Standard specifies a thermal conductimetric method after fusion under inert gas for the determination of nitrogen
20、 in steel and iron. The method is applicable to nitrogen contents between 0,000 8 % (m/m) and 0,5 % (m/m). 2 Normative references The following standards contain provisions which, through reference in this text, constitute provisions of this International Standard. At the time of publication, the ed
21、itions indicated were valid. All standards are subject to revision, and parties to agreements based on this International Standard are encouraged to investigate the possibility of applying the most recent editions of the standards indicated below. Members of IEC and ISO maintain registers of current
22、ly valid International Standards. ISO 385-1:1984, Laboratory glassware Burettes Part 1: General requirements. ISO 648:1977, Laboratory glassware One-mark pipettes. ISO 1042:, Laboratory glassware One-mark volumetric flasks 1) . ISO 3696:1987, Water for analytical laboratory use Specification and tes
23、t methods. ISO 5725-1:1994, Accuracy (trueness and precision) of measurement methods and results Part 1: General principles and definitions. ISO 5725-2:1994, Accuracy (trueness and precision) of measurement methods and results Part 2: Basic method for the determination of repeatability and reproduci
24、bility of a standard measurement method. ISO 5725-3:1994, Accuracy (trueness and precision) of measurement methods and results Part 3: Intermediate measures of the precision of a standard measurement method. ISO 14284:1996, Steel and iron Sampling and preparation of samples for the determination of
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