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1、BRITISH STANDARD BS EN ISO 9556:2001 Incorporating Corrigendum No. 1 Steel and iron Determination of total carbon content Infrared absorption method after combustion in an induction furnace The European Standard EN ISO 9556:2001 has the status of a British Standard ICS 77.080 NO COPYING WITHOUT BSI
2、PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAW Licensed Copy: London South Bank University, London South Bank University, Thu Mar 01 09:16:02 GMT+00:00 2007, Uncontrolled Copy, (c) BSI BS EN ISO 9556:2001 This British Standard, having been prepared under the direction of the Engineering Sector Poli
3、cy and Strategy Committee, was published under the authority of the Standards Policy and Strategy Committee on 3 September 2001 BSI 13 March 2002 ISBN 0 580 38432 2 National foreword This British Standard is the official English language version of EN ISO 9556:2001. It is identical with ISO 9556:198
4、9. It supersedes BS 6200-3.8.3:1990 which is withdrawn. The UK participation in its preparation was entrusted to Technical Committee ISE/18, Sampling and analysis if iron and steel, which has the responsibility to: A list of organizations represented on this committee can be obtained on request to i
5、ts secretary. Cross-references The British Standards which implement international or European publications referred to in this document may be found in the BSI Standards Catalogue under the section entitled “International Standards Correspondence Index”, or by using the “Find” facility of the BSI S
6、tandards Electronic Catalogue. 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 obligations. aid enquir
7、ers to understand the text; present to the responsible international/European committee any enquiries on the interpretation, or proposals for change, and keep the UK interests informed; monitor related international and European developments and promulgate them in the UK. Summary of pages This docum
8、ent comprises a front cover, an inside front cover, the EN ISO title page, the EN ISO foreword page, the ISO title page, the ISO foreword page, pages 1 to 8, the Annex ZA page and a back cover. The BSI copyright date displayed in this document indicates when the document was last issued. Amendments
9、issued since publication Amd. No. DateComments 13762 Corrigendum No. 1 13 March 2002Incorporating Annex ZA Licensed Copy: London South Bank University, London South Bank University, Thu Mar 01 09:16:02 GMT+00:00 2007, Uncontrolled Copy, (c) BSI EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN IS
10、O 9556 June 2001 ICS 07.008.01 English version Steel and iron - Determination of total carbon content - Infrared absorption method after combustion in an induction furnace (ISO 9556:1989) Aciers et fontes - Dosage du carbone total - Mthode par absorption dans linfrarouge aprs combustion dans un four
11、 induction (ISO 9556:1989) This European Standard was approved by CEN on 11 May 2001. CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this European Standard the status of a national standard without any alteration. Up-to-date lists
12、and bibliographical references concerning such national standards may be obtained on application to the Management Centre or to any CEN member. This European Standard exists in three official versions (English, French, German). A version in any other language made by translation under the responsibi
13、lity of a CEN member into its own language and notified to the Management Centre has the same status as the official versions. CEN members are the national standards bodies of Austria, Belgium, Czech Republic, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Netherland
14、s, Norway, Portugal, Spain, Sweden, Switzerland and United Kingdom. EUROPEAN COMMITTEE FOR STANDARDIZATION COMIT EUROPEN DE NORMALISATION EUROPISCHES KOMITEE FR NORMUNG Management Centre: rue de Stassart, 36 B-1050 Brussels 2001 CENAll rights of exploitation in any form and by any means reserved wor
15、ldwide for CEN national Members. Ref. No. EN ISO 9556:2001 E Licensed Copy: London South Bank University, London South Bank University, Thu Mar 01 09:16:02 GMT+00:00 2007, Uncontrolled Copy, (c) BSI CORRECTED 2002-01-02 Foreword The text of the International Standard from Technical Committee ISO/TC
16、17 “Steel“ of the International Organization for Standardization (ISO) has been taken over as a European Standard 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 nati
17、onal standard, either by publication of an identical text or by endorsement, at the latest by December 2001, and conflicting national standards shall be withdrawn at the latest by December 2001. According to the CEN/CENELEC Internal Regulations, the national standards organizations of the following
18、countries are bound to implement this European Standard: Austria, Belgium, Czech Republic, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and the United Kingdom. Endorsement notice The text of the Internationa
19、l Standard ISO 9556:1989 has been approved by CEN as a European Standard without any modification. NOTE Normative references to International Standards are listed in annex ZA (normative). EN ISO 9556:2001 Licensed Copy: London South Bank University, London South Bank University, Thu Mar 01 09:16:02
20、GMT+00:00 2007, Uncontrolled Copy, (c) BSI INTERNATIONAL STANDARD IS0 9556 First edition 1989-07-15 Corrected and reprinted 1989-11-15 Steel and iron - Determination of total carbon content - Infrared absorption method after combustion in an induction furnace Aciers et fon tes - Dosage du carbone to
21、tal - Mi induction par absorption dans Reference number IS0 9556 : 1989 (E) EN ISO 9556:2001 Licensed Copy: London South Bank University, London South Bank University, Thu Mar 01 09:16:02 GMT+00:00 2007, Uncontrolled Copy, (c) BSI Foreword IS0 (the lnternational Organization for Standardization) is
22、a worldwide federation of national standards bodies (IS0 member bodies). The work of preparing International Standards is normally carried out through IS0 technical committees. Each member body interested in a subject for which a technical committee has been established has the right to be represent
23、ed on that committee. International organizations, govern- mental and non-governmental, in liaison with ISO, also take part in the work. IS0 collaborates closely with the International Electrotechnical Commission (IEC) on all matters of electrotechnical standardization. Draft International Standards
24、 adopted by the technical committees are circulated to the member bodies for approval before their acceptance as International Standards by the IS0 Council. They are approved in accordance with IS0 procedures requiring at least 75 % approval by the member bodies voting. International Standard IS0 95
25、56 was prepared by Technical Committee lSO/TC 17, S tee/. Annexes A, B and C of this International Standard are for information only. EN ISO 9556:2001 Licensed Copy: London South Bank University, London South Bank University, Thu Mar 01 09:16:02 GMT+00:00 2007, Uncontrolled Copy, (c) BSI LANOITANRET
26、NI DRADNATS 0SI 6559 : 9891 )E( Steel and iron - Determination of total carbon content - Infrared absorption method after combustion in an induction furnace 1 Scope This International Standard specifies an infrared absorption method after combustion in an induction furnace for the deter- mination of
27、 the tota; carbon content in steel and iron. The method is applicable to carbon contents between 0,003 % (m/m) and 4,5 % (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 o
28、f publication, the editions indicated were valid. All standards are subject to revision, and parties to agreements based on this International Standard are encour- aged to investigate the possibility of applying the most recent editions of the standards listed below. Members of IEC and IS0 maintain
29、registers of currently valid International Standards. IS0 377: 1985, Wrought steel - Selection andpreparation of samples and test pieces. IS0 385-l : 1984, Laboratory glassware - Burettes - Part 7: General requirements. IS0 648 : 1977, Laboratory glassware - One-mark pipettes. IS0 1042 : 1983, Labor
30、atory glassware - One-mark volumetric flasks. IS0 5725 : 1986, Precision of test methods - Determination of repeatability and reproducibility for a standard test method by inter-laboratory tests. 3 Principle Combustion of a test portion with accelerator at a high temperature in a high-frequency indu
31、ction furnace in a current of pure oxygen. Transformation of carbon into carbon dioxide and/or carbon monoxide. Measurement by infrared absorption of the carbon dioxide and/or carbon monoxide carried by a current of oxygen. 4 Reagents During the analysis, unless otherwise stated, use only reagents o
32、f recognized analytical grade and only distilled water or water of equivalent purity. 4.1 Water, free from carbon dioxide. Boil water for 30 min, cool to room temperature and bubble with oxygen (4.2) for 15 min. Prepare just before use. 4.2 Oxygen, 99,5 % (m/m) minimum. An oxidation catalyst copper
33、oxide or platinum tube heated to a temperature above 450 OC must be used prior to a purify- ing unit (see annex C), when the presence of organic con- taminants is suspected in the oxygen. 4.3 Pure iron, of known low carbon content less than 0,001 0 % (m/m). 4.4 Suitable solvent, appropriate for wash
34、ing greasy or dirty test samples, for example, acetone. 4.5 Magnesium perchlorate Mg(Cl04)$, particle size : from 0,7 mm to I,2 mm. 4.6 Barium carbonate Dry barium carbonate (minimum assay : 99,5 %I at 105 OC to 110 OC for 3 h and cool in a desiccator before use. 4.7 Sodium carbonate Dry anhydrous s
35、odium carbonate (minimum assay: 99,9 %) at 285 OC for 2 h and cool in a desiccator before use. 4.8 Accelerator: copper, tungsten-tin mixture or tungsten of known low carbon content less than 0,001 0 % (m/m). 4.9 Sucrose, standard solution, corresponding to 25 g of C per Iitre. Weigh, to the nearest
36、1 mg, 14,843 g of sucrose (C12HZO11) (analytical standards grade) previously dried at 100 OC to 105 OC for 2,5 h and cooled in a desiccator. EN ISO 9556:2001 Licensed Copy: London South Bank University, London South Bank University, Thu Mar 01 09:16:02 GMT+00:00 2007, Uncontrolled Copy, (c) BSI 0sI
37、6559 : 9891 )E Dissolve in about 100 ml of water (4.1), transfer to a 250 ml one-mark volumetric flask quantitatively, dilute to the mark with water (4.1) and mix. 1 ml of this standard solution contains 25 mg of C. 4.10 Sodium carbonate, standard solution, corresponding to 25 g of C per litre. Weig
38、h, to the nearest 1 mg, 55,152 g of sodium carbonate (4.7), dissolve in about 200 ml of water (4.1), transfer to a 250 ml one-mark volumetric flask quantitatively, dilute to the mark with water (4.1) and mix. 1 ml of this standard solution contains 25 mg of C. 4.11 I nert cera mic (attapulgus clay)
39、impregnated sodium hydroxide, particle size : from 0,7 mm to 1,2 mm. with 5 Apparatus During the analysis, unless otherwise stated, use only ordinary laboratory apparatus. All volumetric glassware shall be class A, in accordance with IS0 385-1, IS0 648 or IS0 1042 as appropriate. The apparatus requi
40、red for combustion in a high-frequency in- duction furnace and the subsequent infrared absorption measurement of the evolved carbon dioxide and/or carbon monoxide may be obtained commercially from a number of manufacturers. Follow the manufacturers instructions for the operation of the instrument. F
41、eatures of commercial instruments are given in annex C. 5.1 Micropipette, 100 1, limit of error shall be less than 1 PI. 5.2 Tin capsule, about 6 mm in diameter, 18 mm in height, 0,3 g in mass and approximately 0,4 ml in volume, of known low carbon content less than 0,001 0 % (m/m). 5.3 Ceramic cruc
42、ible, capable of withstanding combustion in an induction furnace. Ignite crucibles in an electric furnace in air or in a current of oxygen for not less than 2 h at 1 100 OC and store in a desic- cator before use. NOTE - For the determination of low carbon contents it is advisable to ignite crucibles
43、 at 1 350 OC in a current of oxygen. 6 Sampling Carry out sampling in accordance with IS0 377 or appropriate national standards for iron, 7 Procedure SAFETY INSTRUCTIONS - The risks related to combus- tion analysis are mainly burns in pre-igniting the ceramic crucibles and in the fusions. Use crucib
44、le tongs at all times and suitable containers for the used crucibles. Nor- mal precautions for handling oxygen cylinders shall be taken. Oxygen from the combustion process shall be removed effectively from the apparatus since a high con- centration of oxygen in a confined space can present a fire ha
45、zard. 7.1 General operating instructions Purify the oxygen supply using tubes packed with the inert ceramic (attapulgus clay) impregnated with sodium hydroxide (4.11) and magnesium perchlorate (4.51, and maintain a quies- cent flow rate whilst on standby. Maintain a glass wool filter or a stainless
46、steel net as a dust collector. Clean and change as necessary. The furnace chamber, pedestal post and filter trap shall be cleaned frequently to remove oxide build-up. Allow each item of equipment to stabilize for the time recom- mended by the equipment manufacturers when the main supply is switched
47、on after being out of action for any length of time. After cleaning the furnace chamber and/or changing filters or after the equipment has been inoperative for a period, stabilize the apparatus by burning several samples of similar type to the samples to be analysed prior to setting up for analysis.
48、 Flush oxygen through the apparatus and adjust the instrument controls to give a zero reading. If the instrument used provides a direct reading in percentage of carbon, adjust the instrument reading for each calibration range as follows. Select the certified reference material with a carbon content
49、close to the maximum carbon content in the calibration series, measure the carbon content of the certified reference material in the manner specified in 7.4. Adjust the reading of the instrument to the certified value. NOTE - This adjustment shall be made before the calibration as specified in 7.5. It cannot replace or correct the calibration. 7.2 Test portion Degrease the test sample by washing in a suitable solvent (4.4). Evaporate the last traces of the washing liquid by heating. Weigh, to the nearest 1 mg, approximately 1 g of the test sam- ple for carbon conten
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