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1、| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | BRITISH STANDARD BS EN 12535:2000 The Euro
2、pean Standard EN 12535:2000 has the status of a British Standard ICS 25.160.20 NO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAW Welding consumables Tubular cored electrodes for gas shielded metal arc welding of high strength steels Classification Licensed Copy: sheffieldun shef
3、fieldun, na, Sat Oct 28 06:55:22 GMT+00:00 2006, Uncontrolled Copy, (c) BSI This British Standard, having been prepared under the direction of the Engineering Sector Committee, was published under the authority of the Standards Committee and comes into effect on 15 June 2000 BSI 06-2000 ISBN 0 580 3
4、4179 8 BS EN 12535:2000 Amendments issued since publication Amd. No.DateComments National foreword This British Standard is the official English language version of EN 12535:2000. The UK participation in its preparation was entrusted to Technical Committee WEE/39, Welding consumables, which has the
5、responsibility to: aid enquirers to understand the text; present to the responsible 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. A list of or
6、ganizations represented on this committee can be obtained on request to its 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 Stand
7、ards Correspondence Index, or by using the Find facility of the BSI Standards 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
8、does not of itself confer immunity from legal obligations. Summary of pages This document comprises a front cover, an inside front cover, the EN title page, pages 2 to 13 and a back cover. The BSI copyright notice displayed in this document indicates when the document was last issued. Licensed Copy:
9、 sheffieldun sheffieldun, na, Sat Oct 28 06:55:22 GMT+00:00 2006, Uncontrolled Copy, (c) BSI 8523($1?67$1$5 1250(?(8523e(11( (8523b,6 2) the second part gives a symbol indicating the strength and the elongation of the all-weld metal; 3) the third part gives a symbol indicating the impact properties
10、of the all-weld metal; 4) the fourth part gives a symbol indicating the chemical composition of the all-weld metal; 5) the fifth part gives a symbol indicating the type of electrode core; 6) the sixth part gives a symbol indicating the shielding gas; 7) the seventh part gives a symbol indicating the
11、 welding position; 8) the eighth part gives a symbol indicating the hydrogen content of deposited metal; 9) the ninth part gives a symbol indicating the stress relief treatment in case this is applied. In order to promote the use of this standard, the classification is split into two sections: a) Co
12、mpulsory section This section includes the symbols for the type of product, the strength and elongation, the impact properties, the chemical composition, the type of core, the shielding gas and the stress relief treatment, i.e. the symbols defined in 4.1, 4.2, 4.3, 4.4, 4.5, 4.6 and 4.9. b) Optional
13、 section This section includes the symbols for the welding positions for which the electrode is suitable and the symbol for hydrogen content, i.e. the symbols defined in 4.7 and 4.8. The full designation (see clause 8) shall be used on packages and in the manufacturers literature and data sheets. 4S
14、ymbols and requirements 4.1Symbol for the product/process The symbol for the tubular cored electrode used in the metal arc welding process shall be the letter T. Licensed Copy: sheffieldun sheffieldun, na, Sat Oct 28 06:55:22 GMT+00:00 2006, Uncontrolled Copy, (c) BSI 3DJH? (1? ?%6,? 4.2Symbol for s
15、trength and elongation of all-weld metal The symbol in Table 1 indicates yield strength, tensile strength and elongation of the all-weld metal determined in accordance with clause 5. NOTE: Stress relief treatment may alter the strength of the weld metal from that obtained in the as-welded condition.
16、 Table 1 - Symbol for strength and elongation of all-weld metal SymbolMinimum1) yield strength N/mm2 Tensile strength N/mm2 Minimum elongation2) % 55550640 - 82018 62620700 - 89018 69690770 - 94017 79790880 - 108016 89890940 - 118015 1) For yield strength the lower yield (R eL) shall be used when yi
17、elding occurs, otherwise the 0,2 % proof strength (RpO,2) shall be used. 2) Gauge length is equal to five times the test specimen diameter. 4.3Symbol for impact properties of all-weld metal The symbol in Table 2 indicates the temperature at which an average impact energy of 47 J is achieved under co
18、nditions 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 temperature in Table 2. Table 2 - Symbol for impact properti
19、es of all-weld metal Symbol Temperature for minimum average impact energy 47 J C ZNo requirements A+ 20 0 0 2- 20 3- 30 4- 40 5- 50 6- 60 NOTE: Stress relief treatment can alter the impact properties of the weld metal from that obtained in the as-welded condition. Licensed Copy: sheffieldun sheffiel
20、dun, na, Sat Oct 28 06:55:22 GMT+00:00 2006, Uncontrolled Copy, (c) BSI 3DJH? (1? ?%6,? 4.4Symbol for 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
21、 all-weld metal Symbol Chemical composition % 1)2)3) MnNiCrMo ZAny other agreed composition MnMo1,4 to 2,0 -0,3 to 0,6 Mn1Ni1,4 to 2,00,6 to 1,2- - Mn1,5Ni1,1 to 1,81,3 to 1,8- - Mn2,5Ni1,1 to 2,02,1 to 3,0- - 1NiMo1,40,6 to 1,2-0.3 to 0,6 1,5NiMo1,41,2 to 1,8-0,3 to 0,7 2NiMo1,41,8 to 2,6-0,3 to 0,
22、7 Mn1NiMo1,4 to 2,00,6 to 1,2-0,3 to 0,7 Mn2NiMo1,4 to 2,01,8 to 2,6-0,3 to 0,7 Mn2NiCrMo1,4 to 2,01,8 to 2,60,3 to 0,60,3 to 0,6 Mn2Ni1CrMo1,4 to 2,01,8 to 2,60,6 to 1,00,3 to 0,6 1) If not specified: C 0,03 to 0,10 %, Si ? 0,90 %, Ni 0,3 %, Cr 0,2 %, Mo 0,2 %, V 0,05 % Nb 0,05 %, Cu 0,3 %, P 0,020
23、 % and S 0,020 %. 2) Single values shown in the table are maximum values. 3) The results shall be rounded to the same number of significant figures as in the specified value using the rules in accordance with annex B, Rule A of ISO 31-0:1992. 4.5Symbol for type of electrode core The symbol in Table
24、4 indicates different types of tubular cored electrodes relative to their core composition and slag characteristics. Table 4 - Symbol for type of electrode core SymbolCharacteristics RRutile, slow freezing slag PRutile, fast freezing slag BBasic MMetal powder ZOther types NOTE: A description of the
25、characteristics of each of the types of core is given in annex A. Licensed Copy: sheffieldun sheffieldun, na, Sat Oct 28 06:55:22 GMT+00:00 2006, Uncontrolled Copy, (c) BSI 3DJH? (1? ?%6,? 4.6Symbol for shielding gas The symbols M and C indicate shielding gas as described in EN 439. The symbol M, fo
26、r mixed gases, shall be used when the classification has been performed with shielding gas EN 439 - M2, but without helium. The symbol C shall be used when the classification has been performed with shielding gas EN 439 - C1, carbon dioxide. 4.7Symbol for welding position The symbol below for weldin
27、g positions indicates the positions for which the electrode is tested in accordance with EN 1597-3: 1) all positions; 2) all positions, except vertical down; 3) flat butt weld, flat fillet weld, horizontal-vertical fillet weld; 4) flat butt weld, flat fillet weld; 5) vertical down and positions acco
28、rding to symbol 3. 4.8Symbol for hydrogen content of deposited metal The symbol in Table 5 indicates the hydrogen content determined in accordance with the method given in ISO 3690. Table 5 - Symbol for hydrogen content of deposited metal SymbolHydrogen content ml/100 g deposited metal max. H55 H101
29、0 When the letter H is included in the classification the manufacturer shall state in his literature whether the maximum hydrogen level achieved is 10 ml or 5 ml per 100 g of deposited metal, and what restrictions need to be placed on the conditions of storage and on current, arc voltage, electrode
30、extension, polarity and shielding gas to remain within this limit. NOTE 1: Other methods of collection and measurement of the diffusible hydrogen may be used for batch testing provided they possess equal reproducibility with, and are calibrated against, the method given in ISO 3690. NOTE 2: Cracks i
31、n welded joints may be caused or significantly influenced by hydrogen. The risk of hydrogen-induced cracks increases with rising alloy content and stress level. Such cracks generally develop after the joint has become cold and are therefore termed cold cracks. Licensed Copy: sheffieldun sheffieldun,
32、 na, Sat Oct 28 06:55:22 GMT+00:00 2006, Uncontrolled Copy, (c) BSI 3DJH? (1? ?%6,? Assuming that the external conditions are satisfactory (weld areas clean and dry) the hydrogen in the weld metal stems from hydrogen-containing compounds in the consumables. These compounds dissociate in the arc and
33、gives rise to atomic hydrogen which is absorbed by the weld metal. Under given material and stress conditions the risk of cold cracking diminishes with decreasing hydrogen content of the weld metal. NOTE 3: This clause requires the manufacturer to specify boundary conditions of tubular cored electro
34、de size and operating conditions applicable to each hydrogen level achieved, and does not exclude claims for more than one level where these arise under different operating conditions. For example, shielding gases with high CO2 contents generally give lower weld hydrogen levels than those with high
35、argon contents and this may lead to a tubular cored electrode being differently classified when used with different gases. Classification of tubular cored electrodes is intended to provide the best basis for the calculation of preheat levels, which characterizes a welding consumable by a single hydr
36、ogen level. Since hydrogen levels in welds made with tubular cored electrodes gene- rally decrease as the arc voltage and electrode extension increase, care should be taken that the values of these parameters do not fall below the manufacturers recommendations. 4.9Symbol for stress relief treatment
37、The letter T indicates that strength, elongation and impact properties in the classification of all-weld metal fulfil the classification criteria after a stress relief treatment at 560 oC to 600 oC for 1 hour. The test piece shall be left in the furnace for cooling down to 300 oC. 5Mechanical tests
38、Tensile and impact tests and any required retests shall be carried out on weld metal in the as-welded or stress relief condition using an all-weld metal test assembly type 3 in accordance with EN 1597-1 using 1,2 mm, or if this is not manufactured the next larger diameter manufactured, tubular cored
39、 electrode and welding conditions as described below in 5.1 and 5.2. 5.1Preheating and interpass temperatures Welding of the all-weld metal test piece shall be executed in a temperature range from 120 oC to 180 oC with the exception of the first layer in the test assembly, which may be welded withou
40、t preheat. The interpass temperature shall be measured using temperature indicator crayons, surface thermometers or thermocouples in accordance with EN ISO 13916. Licensed Copy: sheffieldun sheffieldun, na, Sat Oct 28 06:55:22 GMT+00:00 2006, Uncontrolled Copy, (c) BSI 3DJH? (1? ?%6,? 5.2Welding con
41、ditions and pass sequence The total number of runs, the number of runs per layer and the total number of layers shall be as given in Table 6. The direction of welding to complete a layer consisting of two passes shall not vary, but the direction of welding of layers shall be alternated. Table 6 - We
42、lding conditions and pass sequence Electrode diameter Passes per layerTotal numberWelding current 2)3) mmFirst layerOther layers1)of layersA 0,9 to 1,21 or 22 or 36 to 9240 to 280 1,4 to 2,01 or 22 or 35 to 8290 to 350 1) The final layer may have four passes. 2) The welding voltage will depend on th
43、e choice of shielding gas. 3) The contact tube distance shall be 20 ? 2 mm. 6Chemical analysis Chemical analysis is performed on any suitable all-weld metal test specimen. In case of dispute specimens in accordance with EN 26847 shall be used. Any analytical technique can be used but in case of disp
44、ute reference shall be made to established published methods. NOTE: See annex B. 7Technical delivery conditions Technical delivery conditions shall meet the requirements in EN 759. 8Designation The designation of tubular cored electrodes has to conform to principles according to following examples.
45、EXAMPLE 1: A tubular cored electrode (T) for gas shielded metal arc welding deposits a weld metal with a minimum yield strength in the as-welded condition of 620 N/mm (62) and a minimum average impact energy of 47 J at - 50 oC (5) and has a chemical composition of 1,7 % Mn, 1,4 % Ni (Mn1,5Ni). The e
46、lectrode with a basic type core (B) was tested under mixed gas (M) and can be used in flat butt and flat fillet welds (4). Hydrogen is determined in accordance with ISO 3690 and does not exceed 5 ml/100 g deposited metal (H5). Licensed Copy: sheffieldun sheffieldun, na, Sat Oct 28 06:55:22 GMT+00:00
47、 2006, Uncontrolled Copy, (c) BSI 3DJH? (1? ?%6,? The designation will be: Tubular cored electrode EN 12535 - T 62 5 Mn1,5Ni B M 4 H5 Compulsory section: Tubular cored electrode EN 12535 - T 62 5 Mn1,5Ni B M where: EN 12535= standard number; T= tubular cored electrode/gas shielded metal arc welding
48、(see 4.1); 62= strength properties (see Table 1); 5= impact properties (see Table 2); Mn1,5Ni= chemical composition of all-weld metal (see Table 3); B= type of electrode core (see 4.5); M= shielding gas (see 4.6); 4= welding position (see 4.7); H5= hydrogen content (see Table 6). EXAMPLE 2: A tubula
49、r cored electrode (T) for gas shielded metal arc welding deposits a weld metal with a minimum yield strength in stress-relieved condition of 550 N/mm (55) and a minimum average impact energy of 47 J at - 50 oC (5) and has a chemical composition of 1.7 % Mn, 1,4 % Ni (Mn1,5Ni). The electrode with a basic type core (B) was tested under mixed gas (M) and can be used in flat butt and flat fillet welds (4). Hydrogen is determined in accordance with ISO 3690 and
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