《BS-EN-499-1995.pdf》由会员分享,可在线阅读,更多相关《BS-EN-499-1995.pdf(14页珍藏版)》请在三一文库上搜索。
1、BRITISH STANDARD BS EN 499:1995 Welding consumables Covered electrodes for manual metal arc welding of non alloy and fine grain steels Classification The European Standard EN 499:1994 has the status of a British Standard BS EN 499:1995 This British Standard, having been prepared under the direction
2、of the Engineering Sector Board (E/-), was published under the authority of the Standards Board and comes into effect on 15 March 1995 BSI 12-1998 The following BSI references relate to the work on this standard: Committee reference WEE/39 Draft for comment 91/75861 DC ISBN 0 580 23788 5 Committees
3、responsible for this British Standard The preparation of this British Standard was entrusted to Technical Committee WEE/39, Welding consumables, upon which the following bodies were represented: Aluminium Federation Associated Offices Technical Committee Association of Welding Distributors British A
4、ssociation for Brazing and Soldering British Compressed Gases Association British Constructional Steelwork Association Ltd. British Steel Industry Electricity Association Engineering Equipment and Materials Users Association Lloyds Register of Shipping Magnesium Industry Council Power Generation Con
5、tractors Association (PGCA (BEAMA Ltd.) Process Plant Association Stainless Steel Wire Industry Association Welding Institute Welding Manufacturers Association (BEAMA Ltd.) Coopted member Amendments issued since publication Amd. No.DateComments BS EN 499:1995 BSI 12-1998i Contents Page Committees re
6、sponsibleInside front National forewordii Foreword2 Text of EN 4993 List of referencesInside back cover BS EN 499:1995 ii BSI 12-1998 National foreword This British Standard has been prepared by Technical Committee WEE/39 and is the English language version of EN 499:1994 Welding consumables Covered
7、 electrodes for manual metal arc welding of non alloy and fine grain steels Classification, published by the European Committee for Standardization (CEN). EN 499 was produced as a result of international discussion in which the United Kingdom took an active part. EN 499 supersedes BS 639:1986 which
8、is withdrawn. 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. Cross-references Publicatio
9、n referred toCorresponding British Standard EN 22401:1993BS EN 22401:1994 Covered electrodes Determination of the efficiency, metal recovery and deposition coefficient EN 26847:1993BS EN 26847:1994 Covered electrodes for manual metal arc welding Deposition of a weld metal pad for chemical analysis I
10、SO 31-0:1992BS 5775 Specification for quantities, units and symbols Part 0:1993 General principles Summary of pages This document comprises a front cover, an inside front cover, pages i and ii, the EN title page, pages 2 to 8, an inside back cover and a back cover. This standard has been updated (se
11、e copyright date) and may have had amendments incorporated. This will be indicated in the amendment table on the inside front cover. EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN 499 December 1994 ICS 25.160.20 Descriptors: Manual metal arc welding, welding electrodes, covered electrodes, una
12、lloyed steels, manganese steels, alloy steels, classification, symbols English version Welding consumables Covered electrodes for manual metal arc welding of non alloy and fine grain steels Classification Produits consommables pour le soudage Electrodes enrobes pour le soudage manuel l arc des acier
13、s non allis et des aciers grain fin Classification Schweizustze Umhllte Stabelektroden zum Lichtbogenhandschweien von unlegierten Sthlen und Feinkornsthlen Einteilung This European Standard was approved by CEN on 1994-12-05. CEN members are bound to comply with the CEN/CENELEC Internal Regulations w
14、hich stipulate the conditions for giving this 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 S
15、tandard exists in three official versions (English, 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 s
16、tandards bodies of Austria, Belgium, Denmark, 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
17、Central Secretariat: rue de Stassart 36, B-1050 Brussels 1994 Copyright reserved to CEN members Ref. No. EN 499:1994 E EN 499:1994 BSI 12-1998 2 Foreword This European Standard was prepared by the Technical Committee CEN/TC 121, Welding, the secretariat of which is held by DS. CEN/TC 121 decided to
18、submit the final draft for formal vote by its resolution 132/1992. The result was positive. Annex A is informative and contains a description of types of electrode covering. Annex B is also informative and contains the bibliography. In normative references, reference is made to ISO 3690. It should b
19、e noted that a European Standard (00121129) is under preparation for the same subject in CEN/TC 121/SC 3. This European Standard shall be given the status of a national standard, either by publication of an identical text or by endorsement, at the latest by June 1995 and conflicting national standar
20、ds shall be withdrawn at the latest by June 1995. According to the CEN/CENELEC Internal Regulations, the following countries are bound to implement this European Standard: Austria, Belgium, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal,
21、 Spain, Sweden, Switzerland and United Kingdom. Contents Page Foreword2 0Introduction3 1Scope3 2Normative references3 3Classification3 4Symbols and requirements4 4.1Symbol for the product/process4 4.2Symbol for strength and elongation of all-weld metal4 4.3Symbol for impact properties of all-weld me
22、tal4 4.4Symbol for the chemical composition of all-weld metal4 4.5Symbol for type of electrode covering4 4.6Symbol for weld metal recovery and type of current5 4.7Symbol for welding position5 4.8Symbol for hydrogen content of all-weld metal5 5Mechanical tests5 5.1Preheating and interpass temperature
23、s5 5.2Pass sequence6 6Chemical analysis6 7Technical delivery conditions6 8Example of designation6 Annex A (informative) Description of types of electrode covering7 Annex B (informative) Bibliography8 Table 1 Symbol for strength and elongation of all-weld metal4 Table 2 Symbol for impact properties o
24、f all-weld metal4 Table 3 Symbol for chemical composition of all-weld metal4 Table 4 Symbol for weld metal recovery and type of current5 Table 5 Symbol for hydrogen content of all-weld metal5 Table 6 Pass sequence6 EN 499:1994 BSI 12-19983 0 Introduction This standard proposes a classification in or
25、der to designate covered electrodes in terms of the yield strength, tensile strength and elongation of the all-weld metal. The ratio of yield to tensile strength of weld metal is generally higher than that of parent metal. Users should note that matching weld metal yield strength to parent metal yie
26、ld strength will not necessarily ensure that the weld metal tensile strength matches that of the parent material. Where the application requires matching tensile strength, therefore, selection of the consumable should be made by reference to column 3 of Table 1. It should be noted that the mechanica
27、l properties of all-weld metal test specimens used to classify the electrodes will vary from those obtained in production joints because of differences in welding procedure such as electrode size, width of weave, welding position and material composition. 1 Scope This standard specifies requirements
28、 for classification of covered electrodes and deposited metal in the as-welded condition for manual metal arc welding of non alloy and fine grain steels with a minimum yield strength of up to 500 N/mm2 in the welded condition. 2 Normative references This European Standard incorporates by dated or un
29、dated reference, provisions from other publications. These normative references are cited at the appropriate places in the text and the publications are listed hereafter. For dated references, subsequent amendments to or revisions of any of these publications apply to this European Standards only wh
30、en incorporated in it by amendment or revision. For undated references the latest edition of the publication referred to applies. prEN 759, Welding consumables Technical delivery conditions for welding filler metals including type of product, dimensions, tolerances and marking. EN 1597-1, Welding co
31、nsumables Testing for classification Part 1: Test assembly for all-weld metal test specimen in steel, nickel and nickel alloys. prEN 1597-3, Welding consumables Testing for classification Part 3: Testing of positional capability of welding consumables in a fillet weld. EN 22401, Covered electrodes D
32、etermination of the efficiency, metal recovery and deposition coefficient. EN 26847, Covered electrodes for manual metal arc welding Deposition of a weld metal pad for chemical analysis. ISO 31-0, Quantities and units Part 0: General principles. ISO 3690, Welding Determination of hydrogen in deposit
33、ed weld metal arising from the use of covered electrodes for welding mild and low alloy steels. 3 Classification The classification includes all-weld metal properties obtained with a covered electrode as given below. The classification is based on the electrode size 4 mm with the exception of the sy
34、mbol for welding position which is based on EN 1597-3. The classification is divided into eight parts: 1) the first part gives a symbol indicating the product/process to be identified; 2) the second part gives a symbol indicating the strength and elongation of all-weld metal; 3) the third part gives
35、 a symbol indicating the impact properties of all-weld metal; 4) the fourth part gives a symbol indicating the chemical composition of all-weld metal; 5) the fifth part gives a symbol indicating the type of electrode covering; 6) the sixth part gives a symbol indicating the weld metal recovery and t
36、ype of current; 7) the seventh part gives a symbol indicating the welding position; 8) the eight part gives a symbol indicating the hydrogen content of all-weld metal. In order to promote the use of this standard, the classification is split into two sections: a) Compulsory section This section incl
37、udes the symbols for the type of product, the strength and elongation, the impact properties, the chemical composition and the type of covering, i.e. the symbols defined in 4.1, 4.2, 4.3, 4.4 and 4.5. b) Optional section This section includes the symbols for the weld metal recovery, the type of curr
38、ent, the welding positions for which the electrode is suitable, and the symbol for hydrogen content, i.e. the symbols defined in 4.6, 4.7 and 4.8. The full designation (see clause 8) shall be used on packages and in the manufacturers literature and data sheets. EN 499:1994 4 BSI 12-1998 4 Symbols an
39、d requirements 4.1 Symbol for the product/process The symbol for the covered electrode used in the manual metal arc welding process shall be the letter E placed at the beginning of the designation. 4.2 Symbol for strength and elongation of all-weld metal The symbol in Table 1 indicates yield strengt
40、h, tensile strength and elongation of the all-weld metal in the as-welded condition determined in accordance with clause 5. Table 1 Symbol for strength and elongation of all-weld metal 4.3 Symbol for impact properties of all-weld metal The symbol in Table 2 indicates the temperature at which an aver
41、age impact energy of 47 J is achieved under the conditions given in clause 5. Three specimens shall be tested. Only one individual value may be lower than 47 J but not lower than 32 J. When an all-weld metal has been classified for a certain temperature, it automatically covers any higher temperatur
42、e in Table 2. Table 2 Symbol for impact properties of all-weld metal 4.4 Symbol for the chemical composition of all-weld metal The symbol in Table 3 indicates the chemical composition of all-weld metal, determined in accordance with clause 6. Table 3 Symbol for chemical composition of all-weld metal
43、 4.5 Symbol for type of electrode covering The type of covering of a covered electrode depends substantially on the type of slag-forming components. The symbols indicating the type shall be formed by the following letters or groups of letters: NOTEA description of the characteristics of each of the
44、types of covering is given in annex A. SymbolMinimum yield strengtha Tensile strength Minimum elongationb N/mm2N/mm2 % 35355440 57022 38380470 60020 42420500 64020 46460530 68020 50500560 72018 a For yield strength the lower yield (ReL) shall be used when yielding occurs, otherwise the 0,2 % proof s
45、trength (Rpo,2) shall be used. b Gauge length is equal to five times the specimen diameter. SymbolTemperature for minimum average impact energy of 47 J C ZNo requirement A+ 20 00 2 20 3 30 4 40 5 50 6 60 Alloy symbol Chemical compositionabc MnMoNi No symbol2,0 Mo1,40,3 0,6 MnMo 1,4 2,00,3 0,6 1Ni1,4
46、0,6 1,2 2Ni1,41,8 2,6 3Ni1,4 2,6 3,8 Mn1Ni 1,4 2,00,6 1,2 1NiMo1,40,3 0,60,6 1,2 ZAny other agreed composition a If not specified Mo 105 125a.c. + d.c. 4 105 125d.c. 5 125 160a.c. + d.c. 6 125 160d.c. 7 160a.c. + d.c. 8 160d.c. a In order to demonstrate operability on a.c., tests shall be carried ou
47、t with no-load voltage not higher than 65 V. b a.c. = alternating current; d.c. = direct current. SymbolHydrogen content ml/100 g all-weld metal max. H55 H1010 H1515 EN 499:1994 6 BSI 12-1998 5.2 Pass sequence The pass sequence shall be as indicated in Table 6. The direction of welding to complete a
48、 layer consisting of two passes shall not vary, but the direction of welding of layers shall be alternated. Each pass shall be welded with a welding current of 90 % of the maximum current recommended by the manufacturer. Regardless of the type of covering, welding shall be performed with a.c. when b
49、oth a.c. and d.c. are recommended and with d.c. using the recommended polarity when only d.c. is claimed. Table 6 Pass sequence 6 Chemical analysis Chemical analysis shall be performed on any suitable test piece. In case of dispute specimens in accordance with EN 26847 shall be used. Any analytical technique may be used, but in case of dispute reference shall be made to established published methods. NOTESee B.1 and B.2. 7 Technical delivery c
链接地址:https://www.31doc.com/p-3742810.html