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Is - 814 - 1991 (Part-1)

IS 814

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Sumit Shyamal
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2K views16 pages

Is - 814 - 1991 (Part-1)

IS 814

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Sumit Shyamal
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© © All Rights Reserved
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ise Fre no ff 1s 814: 1991 ((Superseding IS 815 ; 1974 ) ada ATE Bee ar aT fest & far wat ada ae Bat terite gerd eeaets — fafertte ( staat greiert ) Indian Standard COVERED ELECTRODES FOR MANUAL METAL ARC WELDING OF rs CARBON AND CARBON MANGANESE i STEEL — SPECIFICATION ( Fifth Revision ) First Reprint OCTOBER 1992 UDC 6217917530424 ® © BIS 199t 4 BUREAU OF INDIAN STANDARDS j MANAK BHaY4N, 9 BAHADUR SHAH ZAFAR MARG NEW DELHI 110002 Price Group 9 Az telr| October 1991 Welding General Sectional Committee, MTD LI FOREWORD This Indian Standard ( Fifth Revision) was adopted by the Bureau of Indian Standards, after the draft finalized by the Wslling General Sectional Commitice had been approved by the Metallurgical Engineering Division Council. Requirements of covered electrodes for metal arc welding of structural steel were covered in» | Part T and Part 11 of IS 814 for welding products other than shects and fur welding sheets + Tespctively, 1S 814 was first published in [957 and subsequently revised in 1963, 1967, 1970 and 1974,” In the fourth revision, 18 8i4, was split in two parts The classification and coding of the covered electendes was covered in 18 $15. 18 615 was first fcsued in 1956 and subsequently revised in 1966 and 1974. While revising these two standards the committee thought it appropriate to cover the elassifica- tion und coding along With the specified tequirements of electrodes by merging both the paris of IS 814 and IS 815. Important modifications affected in tiis revision are as under: 4) The classifiation system has been simplified to « code consisting of a alphabets to i cate the type of coating and four digits to indicate the basic properties of the electrode; bb ‘The tests for deep penetration electrodes have been eliminated as these were considered to be of Tittle significance: ©} In the butt weld assembly the transverse tensile anil charpy impact tests have been elimi= nated and only bend test has been specified. Provisions for thydrogen removal hent- teeatment’ for the bend specimen have also been included; 4) For the detetinination of the quantity of liffosible hydrogen a reference has been made to IS 11802 : 1986 “Methods for determination of diffusible hydrogen content of deposited weld metals from covered eleettodes in Welding mild and. low alloy. stecs’; 6) Use of non-rimming stecl for core wire has been permitted by giving refereace to the amended 1S 2879 : 1975 +Mild stect far metal arc welding electrode core wires (second revision Ys i 1) Assessment of all weld impact test hag been made on the lines af ANSI/AWSA 5.1-81, ‘Specification for covered carbon stect are welding electrodes"; and #8) Under the initial tests, radiographic test has been inclued. This country lard keeps in view the manufacturing and trade practices being followed in the this field. Assistance has also been derived from the following publications: 4) ISO 2560-1973, -Covered electrodes for manual metal are welding of mild stecl and low alley steel — Code of symbols for identification’ issued by the Iaternational Organization for Standardization (180). b) BS 639: 1986 “Specification for covered carbon and carbon manganese steel electrodes for manual metal are welding’ issued by British Standards Institution ¢ BSE ). ¢) ANSI/AWSA. $.1-1981 ‘Specification for covered carbon steel arc welding electrodes’ issued by American National Standards Institute (USA ). For the purpose of deciding whether a particular requirement of this standard is complied with the finat value, observed or ealeulated, expressing the result ofa test or analysis, shall. be rounded off in accordance with 18 2: 1960 -Rules for rounding off numerical valucs (revised )~ ‘The number of significant places retained in the rounded off values showld be the same as that ‘of the specified valve in this standard AMENDMENT NO. 1 JANUARY 1994 TO 1S 814: 1991 COVERED ELECTRODES FOR MANUAL METAL ARC WELDING OF CARBON AND ‘CARBON MANGANESE STEEL (Fifth Revision ) [ Pages, clause 8.1(0) | —Substitate the existing by we followin “fy Radiourephic quality test for eediographic quality clectzodes (see 9.6 )” (Page 5, elause 8.3, Nore 1) — Delete the following from lines 2 snd 3: not excoedng E000 kgin wet [ Page 5, clause 8.3, Nate 3 (il) | — Age "of me weld mew” after the words “include cherical aselses” in Ube sixth Fine. (Pages, classe 91-1 ) — Substiote the frst semenee by the following: “Two all weld test assembliee shall be prepared one using: 4.mmz and the other using the bighest size manufactured in accordance with the method described in Annee G! (Page, clause 5.2.1 )— Add tbe follatving note at tbe end of tbe clause: Sort — In evs AS en ne rg ize amet onr al wel at ceil be pared wi ise” (Pape 6, clause 9.3) — Ad sew clauses as given below and rerumbe: subsequentclauses: 49:3 Transverse Dend Test (For Sizes Upto and Including 2.5 mmm) Two sheets of thickness 216 mm shall be welded as shown in Fic. 4. The dimensions of fe tet pieces ave also shown in Fig.¢. In order tat the test plates ‘elisa completely welded shall be consirined, te fest pieeet may be given a reverse camber befote depositing The Weld. 9.3 Welding shall be made vsing eleteodes of size 25 mm in fist postion. The Temperature of the pareat metal immediately before depositing abe weld metal shall be 27 2°C. Alice completing the "eld on one se of te test piece itsball be cooled downto an about 100°C before depositing weld on tbe ether side. The specimen shall not be subjected to any mechsnical or thermal tecatmentaflet ft welding & completed. 932 From the lest piece $2 prepated nse guide bend lest specimens stall be machine cut as shown in Fig. 5. If the gas culling is adopted the cuning allowance of not less than 3 cw sball be given. 93.3 Two bend tests, one wich the fice and the ofter onder with the rool ia Tension, stall be cacried out in accordance with IS 3600 : 1973, The lest piece shall develop fo erick beyond 1.5 mm or longer or no other barmfel defects in aay direction on the otter surface of tbe bend stall be visible.” (Pages, clause 9.3, tine 5) — Substitute “Annex E° by “Annex (Pages, clause 9.6) — Substiute the existing clause by the following: +946 All welded test assembly (Fig. 7) after removal of backing stip, shail be machined or ground smooth so as to avoid difficuly ia interpretation of radiogn ph of the wel, I shall then be subjected radiographic test as pet 1S 1182 1 1983. The radiograph stall rot stow crack os incomplete fusfon. Toe radiogrpakic sceeplance standard in respect of porosity and slag irclesioas is incticaled ia Table 6, (Remumber the subsequent Tabies) In making the evaluation for rediographic eeceptance standard, 4 Ie 725 mum ftom each end of the welded assembly shall be excluded. ‘Table 6 Radiographic Acceptance Standard in Respect f Porosity and Slag Fneluston BCs Radome pest tBroede “Sanat Ende Bape 7 Ee | t0%es, asi it EB Sex EB GREER ESSIRER, out oos wa)eld “Resapanet Scheie Essien Saas Oye of Blactade (Dia or Leogih) diesem) “Lage wis Helen & Fee Osn0s eo éxio.¥ 5) Minima No.of arhiad Seon eee FR Se (his od ERRNO X nab3 ER SUN | Gas? Lees 04620 © 27Ne, illum Neo indice | inbearone{12 OX 39 1. ene ¢ Esai ina isp Sacer Mo of FBSROLHLN Sil cae asi Usman? noise ee 6 Hatieo Fe EASY > ERIN | Norneqares — - = ma Bis | (Page 8, clause 11.2) — Substivee ‘despatch’ by “date of manufacture’ in the she (Page & Anrex A.) — Substitute the fotlowing by the existn gby I8No. Title Si 1957 Glossary of terms relating to welding and cutting of metals 1387 : 1967 cl requicements forthe supply of metaltorgical mulsczls 1295:1982 Low and medium alloy steel covered electrodes for ‘muneal metal are welding { third revision ) 1599: 1985 Method for ber rest 1608: 1972 Method for tensile testing of see] products 3 ISNvo 1757 1973 19771975 2002 : 1982 262-1992 2879: 1975, 3039: 19885 8500 : 1991 11802; 1986 13083: 1991. Title “Method for beam impact test V-notch) ot steel ‘Structural stcel (ordinary quality} ‘Steel plates for pressure vessels for intermediate and bigh temperature service incliding boilers Steel for general stuetueal purposes (Jowei revision ) SpeciGicetion for wild sel for metal are welding ‘electrodes core wire (Amendments 1, 2and3) tractus stels for construction bulls of ships ‘Weldable siuctural steel (medivet and high stzengih quality) Methods for determination of tiffusihke by drogen ‘content of deposited weld meit from covered clectrodss in Welding mild ané fow alloy steels [Determination of efficiency metal recover; 2nd epgsition coefficient of covered manual metal arc welding electrodes (Poge 9, Table 7, col 3, row 2) — Substinute "350" by 0 (Page 10, clause Br3 ) — Substitute (ACV" by “OCN” in eight { Page 11, clause BoB) — In the lat line substinte "EB $426H2IX" by “EB Sa26HUX". (Page 14, Table 11,¢013) a) Delete ‘1s 26" in line ons. bp Delete *s Gente IT. Jause Jet) — Substitule ‘0CV" by ‘OC¥” imtte thineenth tie ? in Tine five 2 OCTOBER 1995 I$ B14: 199] COVERED ELECTRODES FOR MANUAL METAL aRG ARON AND CARBON MANGANESE STEEL ~ SPECIFICATION (Filth: Revisian } afstitee the following for the existing matter: ality slecirodes ( see 96) eahographix insert “gp Transveise bend (ost [ far sizes wp to andl inelvding 2-5 mm F) Radio, 5 Page see 9.3) Yat the 2 = Substitute the following fer the existing elawse: Pare 4 2 Periodic Ci These comps exis selected [om among the initial tests evidence thit she clectrodes currently p sl are meant to be red possess the uuioal rests for tens od Impact (see 9.4); mam ) ¢ see 9.3); Lond Cost (Cor sizes up ta a an We Lest (sce 98 Jl ineinding 2 mace in a year. These Lests shall not_apply to the electrodes hen production of a type of clecteode after stoppage of is restored the initial tests ¢ see 8.1) shall be conducted.” ( page 5 clause 8.3, Nose 1, lines 2 and 3.) ~ Delete sot ceeding # 000 kg in wight’ [Pace S$, clause 8.3, Note 3 (iti), fine 6] — Insert ‘or the weld metal” after “atl sia”. (age §, elouse 94.1) — Substitute the following for the existing frst seate de chemical sseetbties shell he p ‘red one using 4mm and the other using the highest in weeordince +ith lethod described in Anacx G." the follawing noceat the end of the elaus: 3, fase QE) — i cage HIS rt Ie Leven 78 mANUENNEN, My ene Ill weld test aKsamIhly shall be pe ue ede dete 4) — Substitute the word ‘discarded for ‘lise egarded*. (Pa 94} Incect the following new clauses and figures after clause 9.20 and renuunbicr the subyeqten Hashes an! Ligures 93 Transverse Bend Test ( Fur Siecs Up to and Inctoding 25 me) Two sheet. of thickness $15 mut shall be welded as shawn in Fig. 2. The dimensions of uke test pisee: are sls shown in Fig. 2 In onder that the test plates when eompleiely welded shall be Constrained, the test pieces may be iver a reverse camber belore depositing the weld. YALL Welding shall be made usisig elvetrodgs of size 2-5 mm in flat position. The temperature of the parent metal imediately befare depositing the weld metal shall be 27 sk 2°C. After comptes lag the weld on one sile of the test piece it shall be cocked down lo about 190°C before depositing well on the other side, The specimen shall aot be subjected to any mechanical or thermal treatment after the welding i cemplcied 93.2 Fiom the test piece sa prepared twa puide head test spe shewa in Fig. 3. Ifthe gas cutsing be given, 9.3.3 Two bend tests, ong with th out in accordance with 1S x heyond [5 mam o¢ Loy bend shall be visigle ( Poxe 6, cfause 9.3, dine $y — Substitute “Annex J* for*Annex Ht, nens shall be machine cut ac is adopted the cutting allwunee of mot Tess thax 3 aed shall ie fage and thy other with the rout in tensions shall be carried 10 (Part $4: 1983. The test piece shall develop no crnek o other hacns/at defects in any diveetio on the outer surface of the Group 1 ad 4 i | es ao" tba — La “Approximate [All dirtenciows ann FIG. 2 Metab or Maina Face axb Root Trassurmst Westy TrSt SELCISEs REINFORCEMENT TO 6€ FiNsHED UPTO THE THICKNESS OF SHEET areata Al dimenséone in rithm i Fic. 3 Transverse Bunp Tesy Species ( Page 8, clause 9.6) ~~ Substitute the following for the existing clause: 196 All welded test assembly | see Fig. 7 ( renumbered at Fig. 9) | after removal of packing Shall be machined or ground smooth so a5 to avoid difficulty in interpretation of rio the weld, Tt shall thea be subjected to radiographic test as per IS FI82 : 1983, ‘The radic shall not show crack or incomplete fusion. ‘The radiographic acceptance Sandan in respect ae porosity and slag inclusions ie indieated in Table 7 on page 3 of this Amendment. { Renureber the Subsequent Te bles. } In making the evaluation for radiographic acceptance standard, of the welded assembly shall he excluded,” ( Page 8, claure 11.2 } 2) Substitute ‘date of manufacture’ far “despatch” in tin By Insert { see alse 1S 13RSL: 1993 )* at che end of ps {Page 8, Annex A) Substitute the following fur the eais IS Ne. Title 812: 1957 Glossary of terms rel 1d cuttiay of meta’ N82: 1985 Recommended practice for radingsaphie examinations of fusion Joints in stecl plates ¢ second! revision ) 1, length of 25 mm trom each end ng 19 welding 1387: 1993 eral requirements revision ) 1895: 1982 Low and medium alles (third revision} 1599: 1985 Methad for 1608 ting, of steel preducts ( seca 1737: 1988 Method fur charay impact rest ( Venoteh ) for metallle mare fF snztallur materials ¢ second sel coveraal eles Ai metal are welding nd test ( seeaad ecrisian } Method for teasite a 1977-1975 Saruetura st 2002 1992 Steel plates far pressure vessels fir intern. cate and including 8 econ eevisicn Y 262 + 1992 Steel for genital structural purposes { forutle revision} 3879. 1975 Specifies ng electrodes core wire 4 secoed revision ) 3030 $988 Structural stecls for constraeaon halls of 30 Methods af testing fusion welded joints a {Part 5): 1983 verse roor and face bead Lest an bxtt wel ss: AOL Struetaltal revision ) Metbads for le je hy Imetal forn coered electrodes in welsting tanga: 1991 Deter inary quality ) (sec! revbng | four wild steel for metal ars Wel (sero revition J weold metal in tec! = Pars S Tea Casecad rev righ strength qm fogen content of depisi sally stee’s 118 ion of alficiency metal ¢ecovery and deposition eveMlcient af caccr ding ele trades — Recommendation 903 Storage and redying af covered eloctruder before w 1aRST: (Poge 8, Table 7. ea! 3. row 2) — Substitute 360" for ‘337 (Page 10. clease B3, line § 5 -— Sobstinate ‘OCW for “UCV (Page 11, eieuse BS) — Substiauc ‘EB SA2SH 1X: for “ER SARMI2IX' fa the last fi ( Pore 14, Table 11, cof 3) — Diclete “1s 26° and "18 961 Grade WEWS2 (Page 21. clause J.2, line 13» — Substitute *QCV" for OC) (Amendment No. 1, January 392) Withdrawn, ‘Table 7 Radiographic Aeceptance Standard in Respect of Porosity ‘and Stag Inelusion (Clause 9-6 Weciiccons. TE Ulasatcayion atlopraphie Tape of Peres ‘of Elecerede: ie et : 1) Maxima No. of tee sve tis hom t V2 Team 3 Jib Masinauin No. medium sive ib tes CDF Grae 1 Assorid rawr i) Maximum Se Shull see indice toa to be SENAUN. leaner r2wre Median vatolz i oe tes Sit 7 fr Maxinwn Now oF i lame se 8 1 tow “C116 1 Eawn Fe Maginum Na Arta watorn 5 tint 78 i t hab Masioum 8. i amit site tebe Lerwe Mews Fine Not regained UMTD 1) =; IS 814: 1991 Indian Standard COVERED ELECTRODES FOR MANUAL METAL ARC WELDING OF CARBON AND CARBON MANGANESE STEEL — SPECIFICATION ‘ ( Fifth Revision ) 1 SCOPE This standard specifies the requirements for covered curbon and carbon mangancse steel electrodes for carbon and earbon manganese Steel, including hydrogen controlled electrodes for manual metal arc welding of mild and medium tensile steels inchuding structural steels, depositing weldmetal having a tensile sttength aot more than 610 N/mm? NOTES 41 Fer wehl metal with teasile strength bleher Tuan sid Nome, “ceference tay be made. to 1S 15s: 9, How and mediam alloy atect overed clecsrodes fer manuel metal ate welding (hit Sesion) this stundacd it primprily concerned with Jae neshnaies! properuer of Me weld. metal, D0 ipsids pave been Specied on the cherecal ‘co most tion of the weld metal 2 REFERENCES ‘The Indian Standards listed in Annex A ate necessary adjuncts to this standard. 3 TERMINOLOGY 3,0 For the purpose of this standard definitions given in 1S $12 ; 1957 shall apply except for the following: 3A. Weld Slope tis the angle formed between the lines of the weld root and a horizontal reference plane. Slope may be measured either clockwise of anti sloekwisé and either above of below the hor zontal between O-degtee and 90 degree. 3.2 Weld Rotation The rotation of a weld is the angle formed be- tween upper portion, of a vertical reference jane passing through the weld root and a point Sn the face of weld equidistant from both the ) edges of the weld. Rotation may be measured cither clockwise or anticlockwise between + Odegree and 186 dexree. 3.3 Welding Position The welding position 1s given by the combina fp given by tion of weld slope and weld rotation (see 5.4.1). 4 SUPPLY OF MATERIALS General requirements relating to supply of covered. clectrades for metal arc welding shall ‘be as Inid down in JS 1387 = 1967. 3 CLASSIFICATION 5.0 General Classification of eleetrodes shall be indicated By the following coding system of letters and aumerals to indicate the specified properties oF characteristics of the electrode. S01 Main Coding It consists of the following letters and numerals and shall be followed in the order stuted: a) a prefix letter “E’ shall indicate @ covers ed electrode for manual metal arc ‘welding, manufactured by extrusion pro- cess; b) a levter indicating the type of covering (ee 5.1); ©) first digit indicating ultimate tensile strength in combination with the yield. stress of the weld metal deposit (see 5.2); 4) second digit indicating the percentags clongation in combination with the impact values of the weld metal deposited. (see 53}; ®) third digit indicating welding position(s) in which the electrode may be used ( see $5.4); and f) fourth digit indicating the current condi- tion in which the electrode is to be used (see 5.5) IS B14: 1991 5.0.2 Adifiional Coding The following letters indicating the additional properties of the electrades may be used, if required: 2) letters Hy, Ha, Hy, indicating, hydrogen controlfed ‘electrodes { see 5.6 )- b) letters J, K and L indicating inereased metal recovery a: ‘Eilective Electrode Biiciency* as per 1S 13043 : 1991. Speci fication in the followings range ésee 5.7) J = 11) — 129 percents K = 120 — 149 pereent: and L = 150 percent and above. co) fetter 1591 5.8 Radiographic Quality Electrodes The [etter “X" shall be included in the classi- fication as a sufix for those electrodes which deposit radiographic quality welds (see 9.6 ) 6 CORE WIRE FOR ELECTRODES The core wire used for the maaufacture of electrodes shall confirm 10 ES 2879 : 1975 7 DIMENSIONS AND TOLERANCES 7A, Size and Length The size of un electrode shall bz designated by the nominal diameter of the core wire expressed in mm. Sizes of electrodes and corresponding lengths of electrodes shall be as given in Table 4. ‘The tolerance on the specified sore mire shall be + 005 mm, ‘The tolerance on the specified length shall be 3mm. TAA Sizes and Tengths of clectrodes other than those mentioned in Table 4 may be supplied subject lo agreement betwees the manvfacturer and the purchaser. The tolerance in such cases shall be agreed io between the manufacturer and the purchaser. jiameter of the Table 4 Sizes and Lengths of Electrodes (Clanse 7.1) Tim me Teng mam ay G) 1 13001 200 er 50 2 200 0 250 or 300 0 350 25, 23001 300 or 350 dis 430.9 80 3806 450 30 38007 430 o $807 450 so 34007 450 ee 7.2 Bare Length ( Contact Fad ) The contact end of the electrode shall be clean and free from coveriag for enabling it to he gripped by the elegireves hobler as specified below Bure Lewyih, sam. Electeode Sicr, mm dininam ‘Maximum 16 to 315 5 30 40 030 20 0 18 814: 1991 73 Bare Length ( Arc Striking End ) The are striking end of the lectrode shall be bare and permit casy stitking of arc. “The distance from the arg end te the first point ‘where the full eros section of the covering: prevails shall not exceed the following limits: (2) Classification Ijbeore wire dia EBXXXXI|: BBXXXXH2, meter or 2-0 mm EDXXXXH3 and any other whichever is less hyérogen controlled type i) Other types 273 core wite dia- meter of 2-5 mm ‘whichever is Toss 7.4 Concentricity of Flux Covering with Core ‘Wire Tolerance ‘The flux covering on the electrode shall be uniform and caneentric with the core wire. The tolerance for coneentricity of the cover- (see Tig. 1) sbull be such that the maximum gore plus one coveriag dimension shall not exeeed the minimum core plus one ‘overing dimension by more than: a) Spercent of the mean of twodimensions for EBXXXX and ESXXXX class electrodes, by d percent of the mean of two dimensions for ERXXXX, ERRXXXX and EARXXX ‘lass electrode, and 6) Bpersent of the mean of two dimensions for ECXXXX class clecirode. AaB £2. SAFBY) gor eBXXRK and i002 ESKXXX class electrodes. 4 (A438) 4-8 Sig t4 for ERXXXX, ERRXXXX and EAXKXX glass electrodes, Aa Bas: electrodes. (AEB pyrex cass where A = maximum core plas one covering dimension, and B= minimum core plus one covering dimension, 41 Core wire and coverings shall be free of defects which would interfere with dhe uniform welding performance of the electeodc. 8 TESTS FOR ELECTRODE PROPERTIES 8.0 General Electrade shall be subjected ty the following tosis for assessing the mechanical, propertics of the deposited weld metal and. the usability ‘of an electrode for a particular welding ‘position: a) Initial tests, 'b) Periodic cheek tests, and ¢) Quality control tests. CORE wike FLUX COVER'NG 2 * Punuassime TOLERANCES FoR FLUX ‘Covuninc Pig. 1 B01 Anclectrade suitable for operation on auc. or 4. shall be tested on a.c. 8.0.2 When Rominal size is manufactured in more than ‘ane fengths, the electrodes used for the tests Shall be longest manufactured $0.3 The parent metal used for test plates shall conform to the requirements specified ia Annex F 8.1 Initial Tests ese are qualifying or proving tests for each type of modified type of electrodes and shall comprise the following: a) All weld metal mechanical tests for tensile and impact ( see 9-5} bb) Butt weld bend tests (#26 9.275 @) Running performance test (4¢¢ 9.3); @) Increased metal recovery tests for electrodes claiming recovery 110 percent ‘and above (see 9-4): «) Diffusible hydrogen estimation test for hydrogen controlled electrode (0235) f) Radiographic quality test ( see 9.6). 8.2 Periodic Check ‘Tests These comprise of the following tests selected from among the initizI tests and are macant to ‘be repeated at intervals to provide cvidence that the electrodes currently praduced possess the properties proved in the initial tests. Such an electrode of a particular ‘tests shall be conducted at least once in a year, ‘These check tests shall not apply to the elec trodes not manufactured during that period. When production of a type of electrode after stoppage of production for more than six months is restored, the following periodic check test shall be conducted a) All weld metul mechanical tests for ten sie and impact (see 9x1 Ji by Running performance test ( sev 93). 8.3 Quality Control Tests By means of a suitable system of control, the manufacturer shall sutisfy himself that the Composition ans quality of all the clectrodes Currently produced are similar ty those of clec- Yrodes subjected to initial teats. He shatl ease That the result of quality control tests and date of manufacture of electtodes is traced from the batch aumber ef the relevant details, or bork. NOTES Lor the purpose of this, standard, a batch is Aegned ava fora® covered cleettedes not exceed TO'Le in weltnt, of any one sag. ar sas Eaton prodocet. from. eating enti by a Saker nore than one dry minof conitelied chemical Composition ara) cece wire Mlewttied “by a Beat Sarobey of coatrelled chemical sammponition 2 Weutuieaton wf eleetzoce core witce i) Solid core wire for manufacture of sleutrodcy Waetinied by neato shall somsist of material from single nest of metal {iy Soli elecizode cowe vite identified by controlled Ehesutal ugpsivom, ruber thon hy beste shall Ghepist ef mill cous OF one oF tose beat font Sich ‘Guuples have been. takco for chemical "Poe. cesulte of the anaiseis of each wt be within tac cemipesition fats is2079 1973. 3 lWentflntion ef coveriog min: iy Avdiy mix athe quaniily of diy coating ingte GieaRFRALG TE one tne Sa one mixing vessel. Sip mis pray teawided into kmail uuaatity fop production of wet mincs ia osing 2 hg tina iy Covering identified y Giccltode produced fag ingress iy Covering identifica by controlled couiposiion ) Ceutherthan by ry mig) isl consist of ane [Pore Gey arin ane shall be suooted to Stitciene teats Co assure that all-éry mises wikin ihe lor are eguivalea!. Thise "teste "sball Incinde chemical analysis, the results of which Trust fall within the mahwfseioress wcceptanes Tints The ideasifsation of ihe fest_procectve Side seaulis of ty Less shall Ge vovocded 8.34 The manufacturer on request shall make available to the approving and, certifyiag auuthorisigs the records maintained for quality cantrol, for cnsuring that the compasition and ‘quality of all the electrodes currently produced a dry min shall consist of oat a dangle: Aly sain oft IS B14: 1991 are similar to those slectrodes subjected. t0 initial and periodic check tests. Rd Additional Tests Subject to agtecment with the manufacturer, the purchaser may request for adiitional tests to he made or certificates to be provided for cach batch of electrodes supplied. If so, the {esis aad atch definition shall be agreed between the manufacturer and the purchaser. 9 DETAIL OF TESTS 9A All Weld Metal Mechani¢al Tests for Tensile ‘and Tmpact. OAL Weld Assembly ‘Two all weld cost assemblies shall be prepared one using 40 mm and the highest size manue factured the other using in accordance with the method described in Annex G, If the highest size produced by any manufacturer is 440 mm, then two all weld test assemblies using 40 mm and 3-15 mm respectively shall be* prepared. 9.4.2 AN Weld Tensile Tests ‘Two all weld tensile test specimens one from each of the assemblies as given in 9.1.1 shall ‘be prepared and tested in accordance with ihe method described in Annex G. The uki- mate tensile strength and the minimum yield stiess shall comply with the values given in ‘Table 5, When partisular ductile properties are claimed or specified, the minimum percent age clongation shall comply with the appro- priate value given in Table 5. NOTH, — The all weld feaile teu for quality Goat aetOee "Shatin in i" eeld enc: wnout be toed for design purposes. 913 ALL Weld Impact Tests Five charpy V-notch impact test specimens sbull be machined from the same test assembly and tcited in aceordance with the method described in Aanex G at the temperature speci= ‘fin Table § and shall comply with the values given in Table $ at specified temperature. The Fesults of the impact test from five test speci- uicns shall be assessed as specified in 91.315 9.1.32 and 913.3. 9.4.3.1 When computing the average values of the impact propertics from the set of five specimens, the lowest value and the highest value obtained shall be disregarded. 943.2 For slossification EXQIXX EXKIXX nnd LXXSXX, two of the three remaining values shall be grester than the specified 47 joules; 15$14 1991 ‘Table 5 Mechanical Properties of Weld Metal ( Clauses 9-1-2 and 9.1.3) Timinaiee TUN Feeso” Via Strength, Porcentguy ompation —— Tomparabate | Timpact Min ‘Sirenath Min ‘on 3°05,So fering tn joules ‘Nimmat heme ay 2) o a o o ENON 410-510 50 me TNAIKX, 410-510 0 a 471 EXHNX 0510 10 2 ° EXAIXX 410.510 30 24 1 ENGIN #10510 0 2 0 EXSOSK 310.610 se = = ce EXSIXX, 310.610 a 18 er a ERSERN, 510.610, 3a Is @ o FXSIRX, siosio ou 20 20 a si0.610 Mo 20 2 2 51010 300 » a a si0.si0 300 » 46 n Ip view of the possible, scatter in, wel cone of the three may be Tower but shall not be Tess than 41 joules, The computed average value of the three vulues shall be equal to or greater than 47 joules. 9.4.33 For classification EXX4XX, EXXSXX and EXMOXX, two of the three "remaining Values chatl be greater than the specified 27 Joules; une of the three may be lower but shalt TOL be less than 23 joules. The computed ave- tage value of the (hree values shall be equal to tor greater than 27 joules. 9.2. Bute Weld Bend Test Bute weld assemblies shall be prepared in diffe~ rent welding positions fur the various electrode clissification as per the recommendations given in Table 6 and the procedure given in Annex He 9.2.1 From cach buit weld assembly tuo bent tests, one with face and one with root in ten sion shall be carried out, The test specimens shall be bent through am angle of 180 degree overa mandesl hyving a diameter equal to three times the thickness. of the specimen in aceordance with 18 1599 : 1985. The electrodes hall be deemed to be satisfactory, if on coms pletion ofthe test no. crack or defect at the Suter surface of the test specimen is greater than 3 mm measured asross the \est specimen or 1S mm measured along the length of the test specimen, Premature failure at corners of the test specimen shall not be considered asa case for rejection. and testing the upper Jimi of ultimate. tensile Hat SSi0 Ninna and 610 Riau in the twe Eanges alay be excveded by 40 fran. 9.3 Running Performance Test This test is ta be carried ont for electredes of 25mm size and below to assess the weldi performance. ‘The tests shall be conduct lasing threg electrodes as given in Annex He Tite bead sii ually Inspe- ted and should he free from porosities, slag inclusions, cracks ete in the main portion of the bead ux given in Aanex J. The bead shall be reasonably straight and evenly rippled. ‘The slag should be removed with little sffort, 9.4 Iuckeased Metal Recovery Test The metal recavery shall be determined for the electrodes classified under EXXXXXJ, EXXXXXK and EXXXXXL or EXXXXXHJ, EXXAXXHK and EXKXXXILL on the Largest size elerogtede manufactured but not Tower than 4 mm in acserdange with the method given in IS 13043: 1991. The value obtained by the method ghall be vounded off to the nearest muttiple of 5. The rounded recovery figure shall eonform to the requiraments of $0.2( ) for the respec classification. 9:5 Ditfosible Hydrogen Evaluation Test This test shall be, carried out for all electrodes classified under EXXXXNXH and EXXXXXHL preferably using 3-15 mm or 4-0 mm size, The tects shall be conducted as per procedure given in IS 11802: 1986. IS 814: 1991 ‘Table 6 Welaing Procedure for Preparation of Bend Test Pieces ( Clause 9.2) Besitional (cinssecation ow CCK ENXKEX, EXXKEX, ENRKEK BOK, BOX, ‘No. of Bull-Wel ‘asseailes @ 2 ‘As required Peston o Flat (Werd-siope 0° atd-totation O°) Vertical-up (Weld-stone &) Vertieal-down (Weld-slope O°) ‘overhead (Weldatope oF vweld-rotation 190) Flat Verticalup Oreshead Fiat Horizontal Vertical (Weld-elape O° Weld-zotation 9° ) Fist Flat Wertien\ own In all the positions specified by th manufacturers Wielding Procedure o 4) Fist yun with 3:15 0¢ 60 men by Subsequent suns ¢ except last twe layers) ith 4.0r ” Sinim ieeerding 1 nommal peastvs of te electrode 2) sof tooo layers ai Trgst se submitted 2) Pins run with 28 of 345 mm by Sobeequent rune with one ofthe folowing: b.tp with 60 mm or if gecommended by the manu fucturee with Om b2) when the incrcaged metal

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