इंटरनेट मानक Disclosure to Promote the Right To Information Whereas the Parliament of India has set out to provide a practical regime of right to information for citizens to secure access to information under the control of public authorities, in order to promote transparency and accountability in the working of every public authority, and whereas the attached publication of the Bureau of Indian Standards is of particular interest to the public, particularly disadvantaged communities and those engaged in the pursuit of education and knowledge, the attached public safety standard is made available to promote the timely dissemination of this information in an accurate manner to the public. “जान1 का अ+धकार, जी1 का अ+धकार” “प0रा1 को छोड न' 5 तरफ” “The Right to Information, The Right to Live” “Step Out From the Old to the New” Mazdoor Kisan Shakti Sangathan Jawaharlal Nehru IS 5788 (1986): Iron castings with spheroidal or nodular graphite for pressure containing parts for use at elevated temperatures [MTD 6: Pig iron and Cast Iron] “!ान $ एक न' भारत का +नम-ण” Satyanarayan Gangaram Pitroda “Invent a New India Using Knowledge” “!ान एक ऐसा खजाना > जो कभी च0राया नहB जा सकता ह” है” ह Bhartṛhari—Nītiśatakam “Knowledge is such a treasure which cannot be stolen” IS : 5788 - 1986 Indian Standard ( Reaffirmed 2005 ) SPECIFICATION FOR IRON CASTINGS WITH SPHEROIDAL OR NODULAR GRAPHITE FOR PRESSURE CONTAINlNG PARTS FOR USE AT ELEVATED TEMPERATURES (First Rev-ision j First Reprint NOVEMBER 1991 UDC 669.131.7-14 @ Copyright 1987 BUREAU MANAK OF BHAVAN. INDIAN 9 BAHADUR STANDAR-DS SHAH ZAFAR MARG NEW DELHI 110002 Gr-4 February 1987 IS :5788- 1986 Indian Standard ~P~FICATION FOR IRON CASTINGS WITH SPHEROIDAL OR NODULAR GRAPHITE FOR PRESSURE CONTAINlNG PARTS FOR USE AT ELEVATED TEMPERATURES ( First Revision) Pig Iron and Cast h-on Sectional Committee, SMDC 9 Chairman Rsfiesrnling Ductron Castings Ltd, Hyderabad SHRI B. G. SASTIZY Members SHRI M. S. DALVI ( Alternate to Shri B. G. Sastry ) SHRI P. K. AROUA Mechanical Engineering Research Development Organization ( CMERI ), Ludhiana . Indian Iron &z Steel Co Ltd, Burnpur Snn~ R. K. BANERJEW SHRI R. DAYAL ( Alternafe ) Ministry of Defence ( DGOF j SHRI T. K. BANERJEE SHRI A. K. SARKA~~ ( Alfern& ) Bhagwati Spherocast Ltd, Hyderabad DR P. N. BHA~WATI SHRI M. R. SHAH ( Alternate ) Visvesvaraya Iron & Steel Ltd, Bhadravat SHRI K. B. D. 5EERlAH SERX B. S. UMAPATEY ( Alternale ) National Test House, Calcutta SH~I A. M. BISWAS SERI K. L. BARVI ( Alternafe ) Indian Institute of Technology, Kharagpur PROBA. K. CHAK~ABOILTY Indian Register of Shipping, Bombay SHRI S. CBANDRA SHRI H. K. TANEJA ( Allernalc ) CHIWIST & M x T A L L u R 0 I s T Ministry ofRailways EASTERN RAILWAY, J AMALPUR Hindustan Machine Tools Ltd, Bangalore SHRI P. P. CHOPRA SHRI H. S. RAWACEIANDRA ( Alternate 11 SERI P. RAYPRASAD ( Alternate IL ) SHRI V. N. VENKATESAN ( Allernate III ) SHRI A. SHANTARAIU ( Alternate IV ) ( Continued on page 2 ) 0 Copyright 1957 BUREAU OF INDIAN STANDARDS This publication is protected under the Indian Copyrighf Act ( XIV of 1957) and reproduction m whole or in part by any means except with written permission of the publisher shall be deemed to be an infringement of copyright under the said Act. IS t 5188 - 1986 ( Continued from pugs 1 ) Reprwnting Members Mercury Iron & Steel Co, Bombay Iron & Steel Control, Calcutta Sash S. H. CO~XISSARIAT SHRI B. K. DUTTA Sxar S. S. SAH~ ( Alfernafs SHRI S. Y. GRORPADE SH~I P. C. JAIN SJXRIK. h. KINKAR ) Sandur Manganese & Iron Ores Ltd, Mysore Joint Plant Committee, Calcutta Institute of Indian Foundrymen, Calcutta SHRI H. H. SINGE ( Allarnofe ) SHRI V. B. KHANNA Directorate General of Supplies & Disposals ( Inspection Wing ), New Delhi SHRI T. N. UBOVEJA ( Alfarnate \1 Electrosteel Castings Ltd, Calcutta SIIRI B. v. LU SHRI S. B. SEX?QUPTA( Altcrnats) Heavy Engineering Corporation Ltd ( Foundry SERI M. MOHAN Forge Plant ), Ranchi SERI I. ALI ( Alternate ) New Standard Engineering Co Ltd, Bombay ’ SHRI P. _K. MUKHERSEE SHRI DEEPAK SEARMA ( Alternate ) Tata Engineering & Locomotive Co Ltd, Dn P. S. PATTIHAL Jamshedpur Sam U. M. NADQAR ( Alternafe ) SteeE$ority of India Ltd (Bhilai Steel Plant), Da G. RAI SteeLtiu$ority SHRI S. V. RAJWADE SRRI R. R. SARIN ( Alternate ) SIIHK C. P. RAMAMURTI~Y SIII~I D. VA:U~XVA RAO Slllll P. P. KAWOOI Srler S. Ctlouue~ RIXPRE~~:NTATIVE REPXESENTATIVI SHRI A. K. SAHA SHRI B. P. SINoH ( Ahernate) of India Ltd (Bbilai Steel Plant), Shah Malleable Castings Ltd, Bombay Ennore Foundries Ltd, Madras Steel Authority of India Ltd ( Rourkela Plant ), Rourkela Steel Development Commissioner ( Small Scale Industries ), New Delhi Maruti Udyog Ltd, Gurgaon Bokaro Steel Plant, Bokaro ( Alternate ) Directorate General of Technical Development, Nl w Delhi Kesoram Spun Pipes & Foundries, Calcutta Sang P. J. SHENuY SIII~I S. C. NAI(SARIA ( Atternnte ) Tata Iron & Sleel Co Ltd, Jamshedpur SIHU I. S. P. SJJWTY SlIIlI u. SEN SIII:I T. SUL)IIXAI~ ( illlerrrde ) Fertilizer Corporation of India Ltd, Sindri SHnl R. K. SINIJA Walchand Nagar Industry Ltd, Satara SIIUI P. S. N. SUNDRAM Southern Alloy Foundries Pvt Ltd, Madras SH~I S. THIAQHAI:AJAN SIIIII A. TIJAXQAV~LU ( Alternote ) National lMetallurgica1 Laboratory ( CSIR ), Dn S. K. TIWARY Jamshedpur Federation of Engineering Industries of India, SHRI V.~N. UPADI~AYAYA New Delhi SHRI H. L. BHARDWAJ ( Alternatr ) 1 Continued on puge 14 ) 2 IS: 5788.1986 Indian Standard SPECIFICATION -FOR IRON CASTINGS WITH SPHE-ROIDAL -OR NODULAR GRAPHITE FOR PtiESSURE CONTAINING PARTS FOR USE AT ELEVATED TEMPERATURES ( First Revision) 0. FOREWORD 0.1 This Indian Standard ( First Revision ) was adopted by the Indian Standards Institution on 16 June 1986, after the draft finalized by the Pig Iron and Cast Iron Sectional Committee had been approved by the Structural and Metals Division Council. 0.2 This standard was first published in 1970. While reviewing this standard in the light of the experience gained during these years, the Committee has decided to revise this standard aligning it with other existing standards on the subject. 0.3 This standard keeps in view the manufacturing and trade practice being followed in the country in this field. Assistance has also been derived from ASTM A-395-1980 - Ferritic ductile iron pressure retaining castings for use at elevated temperatures, issued by the American Society of Testing and Materials. 0.4 This standard contains clauses which require the purchaser agreement and/o: to specify these requirements, if necessary, while placing the order. 9.5 For the purpose of deciding whether a particular requirement of this standard is complied with, the final value, observed or calculated, expressing the result of a test or analysis shall be rounded off in accordance with IS : 2-1960”. The number of significant places retained in the rounded off value should be the same as that of the specified value in this standard. *Rules for roundingoff numerical values ( rsviscd) . 3 IS :5788- 1986 1. SCOPE 1.1 This standard covers the requirements for iron castings with spheroidal or nodular graphite for pressure containing parts for use at elevated temperatures. 2. SUPPLY OF MATERIAL 2.1 General requirements relating to the supply of the material as laid down in IS : 1387-1967*. shall be 3. MANUFACTURE 3.1 The method of manufacture shall be left to the discretion of the manufacturer provided that the castings conform to this standard. 4. CHEMICAL COMPOSITION 4.1 The castings, when tested in accordance have the following chemical composition: with IS : 228-1972t, Constituent Percent Total carbon, Min Silicon, Max Phosphorus, Max 3-O 2.50 0.08 +hall NOTE1 - For each reduction of 0’01 percent below the maximum specified phosphorus content, an,increase of 0?08 percent silicon above the specified maximum will be permitted,up to a maximum of 2’75 percent. NOTE2 - Silicon content above 2’75 percent, or phosphorus above 0.08 percent have a tendency to lower the impact resistance of the material. If the carbon content is below 3.00 percent, excessive cementite may form during cooling and if this is not removed during the annealing cycle, the impact resistance of the material may be lowered. 5. WORKMANSHIP AND FINISH 5.1 The castings shall be accurately moulded in accordance with the pattern of working drawings supplied by the purchaser with the addition of such letters, figures or marks as may be specified. 5.2 The drawings shall specify the tolerance on all important dimensions. On other dimensions, the toltrance specified in IS : 8350-1977$ shall apply. *General requirements for the supply of metallurgical materials (jirst rcuision ). tMethods of chemical analysis of steels ( second reuision ). +,Deviations for untoleranced dimensions of spheroidal castings. 4 or nodular graphite iron + 6. HEAT TREATMENT 6.1 All castings shall be~given a ferritizing heat treatment to ensure uniform mechanical properties throughout each section and to produce substantially a ferritic structure that contains no massive carbides. 6.2 When specified in the purchase order, castings with mechanical properties obtained ‘as cast’ may have a stress relief heat treatment at a minimum temperature of 550°C. 7. FREEDOM FROM DEFECTS 7.1 The castings shall be free from surface defects, such as adhering sand and shall be reason‘ably smooth. The runners, risers, fin.9and other extraneous metals shall be removed from the castings. They shall be well dressed and fettled. 7.2 The castings shall not~berepaired by welding or brazing but may be plugged in case they leak on hydrostatic test, provided that the diameter of the plug does not exceed 50 mm. The details of the plugging of the casting may be agreed to between the purchaser and the manufacturer. Also any inherent defect revealed during subsequent machining, notwithstanding any previous certificate of satisfactory testing might make the -castings liable to rejection. 8. TEST SAMPLES 8.1 Test samples shall be cast separately in sand moulds. They shall be poured from the same ladle of metal as that used to produce the castings they iepresent and immediately after the castings are poured. Some additional recommendations regarding casting the test samples are given in Appendix A. 8.1.1 The test pieces used for the test specified in 10.1 and 10.2 shall be machined from one of the following type of test samples: a) U-ty#e test samples - The test piece shall be machined from the keei ( that is, the cross-hatched section of Fig. 1 ), b) 22yfie test samples - The test piece shall be machined from the keel ( that is, the cross-hatched section of Fig. 2 ), and c) Knock-oJ type test samples -See Fig. 3. 8.1.2 In principle, test sample Type IIa or IIb of 25 mm effective thickness, shall be used; however, if its mass differs widely from, the casting it represents, another test sample type may be used, by agreement between the manufacturer and the purchaser. j 5 IS : 5788 Types l 1986 I, Ila, Ill and IV Type Ilb L---I RS t I- . F R5 DXVENSIONSIN MJLLWETR,ES BOB TYPIC DIMENSIONS -- I IIa Ilb i11 W 12 25 25 50 75 40 55 90 90 125 30 40 40 60 65 80 100 100 150 165 -- - - A function of the test piece length FIO. 1 ‘U’ TYPE TEST SAMPLES 8.1.3 In exceptional cases, and by prior agreement betw.een the partiesj the test samples may be attached to the castings; in such cases, their location should be agreed to between the manufacturer and the purchaser. 8.1.4 The test samples shall be cast in sand moulds and stripped at a temperature not exceeding 5OOW. 8.1.5 All test samples shall be heat-treated simultaneously adjacent to the relevant casting or castings in the same furnace. with and 9. SAMPLING 9.1 Sampling for Chemical Analysis - Two spoon samples shall be taken during the pouring .of each cast or ladle when about one-third and two-thirds of the metal has been discharged. The spoon sainples so obtained shall be cast separately in dry sand in the form ,of 30 mm diameter bars about 75 mm long. Alternatively, the mould may be filled directly from the metal stream; The test bars shall be suitably marked so that the castings they represent could be identified. 6 - DIMENSIONS IN MILLWETRES BOG TYPE II I 111 IV U 12 25 50 75 I 40 55 100 125 x 25 40 50 65 150 175 135 Y I I % NOTE - The casting shall be 140 I 1 I A function thickness of the 40 mm minimum 181) mm minimum FIG. 2 sand of the test piece mould surrounding length I I the test sample during for types I and II; for types III and IV. ‘Y’ TYPE TEST SAMPLES 9.1.1 After cleaning the surface, two flats shall be ground near the bottom of each test bar and the test bar drilled with a 25 mm drill from one clean surface to the other. The speed of the drill should not be more than 9 to 10 rev/min. Drillings after being thoroughly mixed shall constitute the sample for chemical analysis. 9.1.2 For the determination of total carbon the molten metal shall be -poured into a special split mould ( see Fig. 4 ). This gives pins of iron 3 mm in diameter which have solidified white and which can be broken off and used direct for total carbon determination. Carbon determination from drillings taken from grey samples shall not be done. 9.2 Sampling for Mechanical Tests 9.2.1 If one ladle of metal treated to produce spheroidal or nodular graphite iron is used to make one or more castings, one tensile test shall be made on a’test sample poured from that ladle. 7 L Z=ACCORDING OF TEST TO LENGTH PIECE AN AS-CAST TEST SAMPLE MOULD All dimensions FIG. 3 in millimetres. cK~~~~-O~~’ TYPE TEST SAMPLES IS : 578%- 1986 FRONT AND SIDE ELEVATION All dimensions in millimetres. FIG. 4 PIN MOULD FOR CARBON SAMPLES 9.2.2 If successively treated ladles filled from one furnace are used to produce castings, one tensile test shall be made from each O-5 tonne of castings or part thereof. If more than one treated ladles are involved in the production of this quantity of castings, the manufacturer shall take steps to ascertain that the treatment of other ladles is done by such method as may be agreed to between the purchaser and the manufacturer. He may examine the procedure adopted and satisfy himself that this is adequate. 9 IS : ‘5788 - 1986 9.2.3 In the case of large tonnage of castings being produced continuously the minimum II~UIII~~~of test bars to be provided shall be one tensile test representing ‘every two hours production froni a melting furnace. 9.2.4 For castings weighing more than one tonne, one tensile test shall be conducted on a test sample for each casting, the test sample being cast as an integral part of the casting. 9.2.5 If more than one furnace is used to fill the ladles, then one tensile test shall be made on a test sample poured from a treated ladle of each of the furnaces. 9.2.6 Ml test samples and castings fication. 10. MECHANICAL shall be marked strictly for identi- TEST 10.1 Tensile Test - The tensile test shall be carried out in accordance with IS : 1608-1972*, unlrss otherwise agreed to between the purchaser and the manufacturer. The test piece shall have a gauge diameter of 14 mm and a gauge length of 70 mm ( see Fig. 5 ). To determine compliance with proof stress requirements, thk material tested shall be considered to have passed the test if it dots not undergo an elongation exceeding the specified percentage on being subjected to the specified minimum stress for a period of 15 seconds. R20 d=@\L+0.09 R20 / NOTE - The method of gripping the ends-of the test pieces,.together length 11, may be agreed between the manufacturer and the purchaser. with their Lo is theoriginal gauge length; here & = 5d; d is the original diameter of the test piece; LC is the parallel length; LC >~~I% by agreement between the manufacturer and the purchaser ( in principle LC - LO > d ); and Lr is the total length of the test piece, which depends on LO and It. All dimensions FIQ. 5 in millimetres. TENSILE TEST PIECE *Method -for tensile testing of steel products (Jirst revision ). 10 . IS : 5788 - 1996 19.1.1 In case of samples of type I, the test piece having a reduced diameter shall comply with the following formula: L, - 5+35$?. s 5d where L ,, = original gauge length, S, - original cross-sectional area, and d - original diameter of the test piece. 10.1.2 The mechanical properties shall be as specified in Table TABLE 1, MECHANICAL 1. PROPERTIES REQUIREXENT CEARACTEI~ISTIC Tensile strength, MPa, Min Proof Stress ( 0’2 percent ), Min Elongation percent, Min 410 270 16 10.1.3 In the case of tests carried out on test bars ‘cut from the finished castings, the mechanical properties shall be as agreed to between the purchaser and the manufacturer. when 10.2 Hardness Test - The Brine11 hardness of the meterial, tested in accordance with IS : 1500-1983*, shall be between 142 and 187 HB. 10.2.1 The hardness test shall be carried out on either on a test coupon representing the material of’ the casting. 11. VALIDITY the casting or OF TESTS 11.1 A test may be disregarded if proof results are obtained which are not due to the quality of the cast iron itself, but to any of the following reasons: a) Faulty mounting of the test piece or test machine; defective operation of the b) Defective casting or machining of the test piece; c) Fracture of the tensile test piece beyond the gauge marks; and d) Casting defects in the test piece, evident after fracture. 11.1.1 In the above cases, a new test piece may be taken from the same test sample and the results substituted for those of the defective test piece. *Method for Brine11 hardness test for metallic 11 meterials, ( second reuision ). 16 : 5298 - 1986 12. RE-TEST 12.1 Should any of‘the tests fail to meet the specified property requirements, two re-tests per failed test shall be carried out. 12.1.1 The batch is regarded as conforming to the specified requirements when the results of the two re-tests conform to the values specified in the standard. However, the batch may be rejected if one of the re-tests fails. 12.2 Should the samples of castings supplied in the heat-treated condition fail%0 pass the test, the manufacturer shall have the,right to reheat-treat the castings together with the representative test bars and resubmit &em for inspection and testing. 13. ADDITIONAL ~TESTS 13.1 If the purchaser desires any special tests or requirements, such as hydrostatic test or microstructure, not specified in this standard, he shall state these when placing the enquiry and order for the material. The details of these tests shall be as agreed to between the purchaser and the manufacturer. 14. MARKING 14.1 Unless the purchaser desires otherwise, each casting, wherever practicable, shall be legibly marked with a number or identification mark by which it can be traced to-the melt from which it was made. 14.1.1 Wherever practicable, the castings may also bear the ISI fication Mark. Certi- NOTE - The use of the IS1 Certification Mark is governed by the provisions of the Indian Standards Institution ( Certification Marks ) Act and the Rules and Regulations made thereunder. The IS1 Mark on products covered by an Indian Standard conveys the assurance that they have been produced to comply with the requirements of that standard under a well-defined system of inspection, testing and quality control which is devised and supervised by IS1 and operated by the producer. IS1 marked products are also continuously checked by IS1 for conformity to that Details of conditions under whicha licence for the standard as a further safeguard. use. of the IS1 Certification Mark may be granted to manufacturers or processors, may be obtained from the Indian Standards Institution. 12 1s : 5’188 - 1986 APPENDIX A ( Clause 8.1 ) RECOMMENDATIONS FOR CASTING OF TEST SAMPLES A-l. The test sample may be cast in sand to any convenient size and shape, .provided the sample is sound and free from any casting -defect. A-l.1 Suitable samples for providing a proportional sound tensile test piece are represented in Fig. 1, 2 and 3. These keel or U-blocks have been found satisfactory in service. A-I.2 A convenient form of test sample cut from one of the castings, as agreed to between the purchaser and the manufacturer, may be used for the purpose of testing strength of the casting. A-I.3 In case of sand moulds for test samples of Type III and IV ( see Fig. 1 and 2 ), a rigid COB sand mould is recommended. 13 fS:5788-1986 MCfl,bCtS Re~wcscnting DR G. VENICATARAMAN Bharat Heavy Electricals Ltd Snur A. K. MIWAI> ( Alternafe) SARI K. RAoaAv1sN1maN, Director General, IS1 ( Ex-oficio Mmbsr ) Director ( Strut & Met ) Secrelary SJiRI S. S. SRTHI Joint Director Spheroidal Graphite ( Metals ), IS1 Iron Castings Subcommittee, SMDC 9 : 2 Comerrcr DR P. N. I~J~AOWATI Uhagwati Spherocast Ltd, Ahmadabad Members SHILI M. 11. SllhJr ( flbmnle Dr 1’. N. Bhagwati ) SHRI S. K. AIIU.I,\ Snsr 1). 13. Vyas ( Allcrrrale ) DEPUTY DIRECTOR ( MET )-I to Indian Smelting & REfining Co Ltd, Thane Research, Designs Lucknow Sr Standards Organisation, A~SISTAN~I, RI.:SI~A~L~X0a~:lcx.I~ ( MW-III ) ( illfemale ) Mysorc Kirloskar Ltd, Harihar SIII:I D. K. DI\I’~ ‘il!I~I u. S. (:OVlNI, ( /,llrrtftife ) EIindustan Machiue Tools Ltd, Bangalore SHl<I 1~. A. GANJ)III Hindustan Motors Ltd, Trivellore SllltI v. S. UiX.\NA’l 11 S~tax Ii. SI~INIV.~SAN ( nllertrale ) Escorts Ltd, Faridabad SERI Sarv I). K~[ANNA SHRI NAXINIMR SINC~I ( Allernale ) Business Combine Ltd, Nasik SHRI s. B. PATlIAR Snnr P. R. Txxavult ( dllernale ) Tata Engineering & Locomotive Co DR P. S. PATTIIIAL Jamshedpur DR P. 6. DASUTI<AI~ ( dllemnfe ) AShok Leyland Ltd, Madras REPRESENTA’JIVE . SHRI R. C. PItASAD HMlW, Ranchi SHRI D.K. DAM ( A&male ) Premier Automobiles Ltd, Bombay SHRI K. S. SHAII SEW M. S. SAIIANI ( Aller&e ) Ductron Castings Ltd, Hydcrabad SHRI B. G. SAsTRY SIIHI M. S. DALVI ( rlhunfe ) Tractors & Farm Equipment Ltd, Madras SERI N. S. SWAMLNA’PHAN SHRI S. NATESAN ( Allerfrale ) Fouthcrn Alloy Foundries Pvt Ltd, Madras SHRI S. THIAWXARAJAN SHRI A. TEENGAVELU ( Allertrale ) 14 Ltd, BUREAU INDIAN OF STANDARDS Headquarters: Manak Bhavan, Telephones: Regional Central 9 Bahadur 331 01 31, Shah Zafar Marg, 331 13 75 NEW DELHI 110002 Telegrams: ( Common Manaksanstha to all Offices) Telephone Offices: : Manak Bhavan, 9 Bahadur Shah Zafar Marg, NEW DELHI I?0002 : 1 /14 C. I. T. Scheme VII M, V. I. P. Road. *Eastern Maniktola, CALCUTTA 7-00054 Northern : SC0 445-446, Sector 35-C, CHANDIGARH 160036 Southern : C. I. T. Campus, TWestern : Manakalaya, BOMBAY Branch MADRAS E9 MIDC, 400093 600113 Marol, Andheri I 331 01 31 331 1375 36 24 99 2 18 43 3 16 41 41 24 42 41 25 19 i 41 2916 ( East ), 6 32 92 95 I Offices: ‘Pushpak’. Nurmohamed Shaikh AHMADABAD 380001 SPeenya Industrial Area BANGALORE 560058 Marg, Khanpur, 2-63 I 1 st Stage, Bangalore Tumkur Road Gangotri Complex, 5th Floor, Bhadbhada Road, T. T. Nagar, ~BHOPAL 462003 Plot No. 82/83. Lewis Road, BHUBANESHWAR 751002 531’5. Ward No. 29, R.G. Barua Road, 5th Byelane, GUWAHATI 781003 5-8-56C L. N. Gupta Marg ( Nampally Station Road ), HY DERABAD 500001 Rl4 .Yudhister 117/418 Marg, C Scheme, B Sarvodaya Nagar, JAIPUR KANPUR 208005 ( With 16 5 36 27 3 31 77 23 1083 ( Patliputra Industrial Estate, PATNA 800013 No. 14/1421. University P.O.. Palayam TRIVANDRUM 695035 Offices 667 6 34 6 98 21 68 I 21 82 6 23 16 21 16 21 302005 T.C. /nspaction i 48 2 63 49 38 49 55 38 49 56 71 32 76 92 05 04 17 Sale Point ): Pushpanjali, First Floor, 205-A West High Court Road, Shankar Nagar Square, NAGPUR 440010 Institution of Engineers ( India ) Building, 1332 Shivaji Nagar, PUNE 411005 2 51 71 5 24 35 *Sales Office in Calcutta is at 5 Chowringhee Approach, P. 0. Princep 27 68 00 Street. Calcutta 700072 tSales Office in Bombay is at Novelty Chambers. Grant Road, 89 65 28 Bombay 400007 $Sales Office in Bangalore is at Unity Building, Nerasimharaja Square, 22 36 71 Bangalore 566002 Reprography Unit, BE, New Delhi, India AHENDMENT NO. 1 NOVEMBER 1987 TO IS:5788-1986 SPECIFICATION FOR IRON CASTINGS WITH SPHEROIDILL. OR NODULAR GRAPHITE -FOR PRESSURE CONTAINING PARTS FOR USE AT ELEVATED TEMPERATURES (First Revision) 4.1) - Substitute (Page 4, clause following for the existing clause: the '4.1 The chemical composition of the castings when determined in accordance with the methods specified in IS:228-1959* and/or any of its relevant part or by any other established instrumental/chemical method, shall be as given below: Constituent Percent Total carbon, Min Silicon, Max PhosphorurMax 3.0 2.50 0.08 In case of dispute the procedure specified in X:228-1959* or in its relevant part shall be the referee method. No~te 1 - For each reduction of 0.01 percent the maximum below specified phosphorus content, an increase of 0.08 percent silicon above the specified maximum will be permitted ’ up to a maximum of 2.75 percent. * .’ Note 2 - Silicon content above 2.75 percent, or phosphorus above 0.08 percent have a tendency to lower the impact resistance of the material. If the carbon content is below 3.0 percent, excessive cementfte may form during cooling and if this is not removed during the annealing cycle, the impact resistance of the material may be lowered.' *Method of chemical analysis of pig iron, cast iron plain carbon and low alloy and steels(revised). (SMDC 9) Reprography Unit, BIS, New Delhi, India