Disclosure to Promote the Right To Information

Transcription

1 इ टरन ट म नक 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. ज न1 क अ+धक र, ज 1 क अ+धक र Mazdoor Kisan Shakti Sangathan The Right to Information, The Right to Live प0र 1 क छ ड न' 5 तरफ Jawaharlal Nehru Step Out From the Old to the New IS 25 (1979): antifriction bearing alloys [MTD 9: Lead, Zinc, Cadmium, Tin, Antimony and their Alloys]! न $ एक न' भ रत क +नम-ण Satyanarayan Gangaram Pitroda Invent a New India Using Knowledge! न एक ऐस खज न > ज कभ च0र य नहB ज सकत ह ह Bhartṛhari Nītiśatakam Knowledge is such a treasure which cannot be stolen

2

3

4 Is : Indian Standard SPECIFICATION FOR ANTIFRICTION BEARING ALLOYS ( Third Reuision ) Fil th Reprint APRIL 1996 UDC tg Copyright 1980 BUREAU OF INDIAN STANDARD S MANAK BRAVAN, 9 BAMDUR SHAH ZAFAR MARG NEW DELHI Gr2 Aprir 1980

5 Indian Standard SPECIFICATION FOR ANTIFRICTION BEARING ALLOYS ( Third Retiision ) IS : Lead, Zinc, Tin, Antimony and Their Alloys Sectional Committee, SMDC 12 Chairman SHRI F. A. A. JASDANWALLA Representing Indian Standard Metal Co Ltd, Bombay Members SHRI A. M. BEDAGERI Indian Smelting and Retining Co Ltd, Bombay SHRI A. K. BHATTACHARYA National Test House, Calcutta SHRI C. CHAT~ERIEE Indian Standard Metal Co Ltd, Bombay SHRI N. R. MANIAR ( Alternate ) CHEMIST & METALLURGIST, CEN- Ministry of Railways TRAL RAILWAY, BOMBAY CHEMIST AND METALLURGIST, RDSO, LUCKNOW ( Alternate 1 SHRI P. GHOSH Indian Cable Co Ltd. Calcutta SHRI TRILOK SJNGH ( AIternate 1 SHRI A. K. GUHA Directorate General of Supplies & Disposals, New Delhi SHRI K. M. TANEJA ( AIternafe ) SHRI D. P. JAIN Saru Smelting Pvt Ltd, Meerut SHRJ D. N. CHAKRABORTY ( Alternate ) SHRI K~SHORJ LAL National Metallurgical Jamshedpur Laboratory ( CSIR ), SHRI C. S. SJVARAMAKRJSHAN ( Alternate ) SHR~ LAXAMAN MJSHRA Directorste General of Technical Development, New Delhi SHRI M. K. BANERJ~E ( Alternate ) SHRI G. D. MODJ Ail India Type Founders Association, Bombay SHRI PRITOSH DHAR ( Afternate I ) SHRI A. M. TH~RUNAVAKARAM ( Akrnate 11 ) SHRI K. R. NARASIMHA Metal Box Company of India Ltd. CopyfiRht 1980 (Continued on page 2 ) BUREAU OF INDIAN STANDARDS This publication is protected under the Indian Copyright Act ( XIV of 1957 ) and reproduction in whole or in part by any means except with wruten permission ol the publisher shall be deemed to be an infringement of copyright under the sail Act.

6 IS : (Continued from page 1) Members Representing SHRI A. T. PAL Ministry of Defence ( R & D ) SHRI I. N. BHATIA ( Alternate ) SHRI RAMAN LAL NAOINDAS PARIKH Star Metal Refinery Private Ltd, Bombay SHRI HARISH CHANDRA SHARMA ( Alternate ) SHRI B. R. RAI Cominco Binani Zinc Ltd, Calcutta SHRI N. SRINNASAN ( Alternate ) SHRI M. K. RAO Binani Metal Works Ltd. Calcutta SHRI B. N. RAY Ministry of Drfence (DGI ) SHRI P. M. SENGUPTA ( Alternate ) SHRI T. R. SHANMUOAM Bharat Electronics Ltd. Bangalore SHR~ N. SRBENIVASAN Union Carbide India Ltd, Calcutta SHRI R. K. MEHROTRA ( Alternate ) SHRI V. R. SUBRAUANIAN Indian Lead/Zinc Information Centre, New Delhi SHRI A. C. WADHAVAN Hindustan Zinc Ltd, Udaipur DR B. R. L. Row ( Alternate ) SHRI C. R. RAMA RAO, Director General, ISI ( Ex-officio Member ) Director ( Strut & Met ) Secretary SHRI S. L. BALI Deputy Director ( Metals ), IS1 2

7 IS : Indian Standard SPECIFICATION FOR ANTIFRICTION BEARING ALLOkS ( Third Reoision ) 0. FOREWORD 0.1 This Indian Standard ( Third Revision ) was adopted by the Indian Standards Institution on 22 June 1979, after the draft finalized by the Lead, Zinc, Tin, Antimony and Their Alloys Sectional Committee had been approved by the Structural and Metals Division Council. 0.2 This standard was originally published in 1950 and, subsequently revised in 1961 and In this revision of the standard, clause on shapes and weights of ingots has been revised. Sampling clause has been modified and impurity limits for Grade 6 have been revised, Pouring temperature ranges and typical uses of the alloys are given in Appendix A for information. 0.3 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 : *. The number of significant places retained in the rounded off value should be the same as that of the specified value in this standard. 1. SCOPE 1.1 This standard covers the requirements for ten grades of antifriction bearing alloys ( see Table 1 ). 2. SUPPLY OF MATERIAL 2.1 General requirements relating to the supply of antifriction bearing alloys shall conform to IS: t. 3. CHEMICAL COMPOSITION 3.1 The material when analyzed in accordance with IS : : shall have the chemical composition as given in Table 1. *Rules for rounding off numerical values ( revised ). tgeneta1 requirements for the supply of metallurgical materials ( first revision ). SMethods of chemical analysis of antifriction bearing alloys. 3

8 TABLE 1 CHEMICAL COMPOSITION OF ANTIFRICTION BEARING ALLOYS ( CImuu 1.1 wld 3.1 ) GRADE ALLOYING Em- PER~XWT hwvnmes, PERCENT, Max TOTAL OF 5 A t *, INDICATED J.%I Sb Pb cu Ni Cd As Zn Fe As Al Bi Zn Cd IMPURITIES, PERCENT, Max (1) 90 (2) (3) (4) (5) (6) 9OJuin (7) (8) (9) (10) (11) (12) (13) (14) (15) (16) 0.15 tl k I 84 84hfin PO-11.0 W3Max 5~0-~ OW Remainder OW Of) P 69 68s7OQ 0.2 Max O-3 MUJS 1~0-1* o O Remainder *0 14lXl&O Remainder Xk O-10 Or ~0 Remainder 0%&1*20 O s I % WOO O @1&0 Max

9 4. FREEDOM FROM DEFECTS IS: The ingots shall be homogeneous and free from non-metallic inclusions, and have a clean appearance, and fine grain structure. 5. SHAPE AND WEIGHT OF INGOTS 5.1 The shape and weight of ingots shall be agreed to between the purchaser and the manufacturer. 6. FRACTURE TEST 6.1 Unless otherwise agreed to between the purchaser and the manufacturer, two percent of the ingots from each melt shall be broken at the notch to find out the nature of fracture. The fractured surfaces shall not show segregation, dross, dirt, spots, overheated metal or any type of non-metallic inclusions. 7. SAMPLING 7.1 Sampling for Chemical Analysis - Unless otherwise agreed to between the purchaser and the manufacturer, two ingots or two percent of the ingots, whichever is greater shall be, selected at random from each melt The method of preparing samples for chemical analysis from the ingots selected under 7.1 shall be in accordance with IS : Sampling for Fracture Test - Unless otherwise agreed to between the purchaser and the manufacturer, sampling shall be done as given in RE-TESTS 8.1 Re-test for Chemical Cqmposition - If the sample prepared under fails to meet the requirements under 3.1, two more tests shall be conducted on the same sample in order to confirm that the analysis has been done correctly. If both the test results satisfy the relevant requirements, the lot shall be accepted. Should either of the re-tests fail, the lot represented shall be deemed as not complying with this standard. 8.2 Re-test for Fracture Test - If the samples selected and tested to meet the requirements under 6.1 fail, two further samples shall be selected from the same melt and shall be broken at the notch to find out the nature of the fracture. Should the fractured surfaces of any one of the ingots show segregation, dross, dirt, spots, overheated metal or any type of non-metallic inclusions, the lot shall be deemed as not complying with this standard. *Methods of chemical analysis of antifriction bearing alloys. 5

10 Is: MARKING 9.1 Each ingot shall be legibly marked with: a) Cast number; b) Grade of the material; and c) Manufacturer s name, initials or trade-mark. 9.2 BIS Certifkation hh-kiag The product may also be msrked with Standard Mark. 9.2.X The use of the Standard Mark is governed by the provisions of the Bureau of Indian Standards Act, 1986 and the Rules and Regulations made thereunder. The details of conditions under which the Iicence for the use of Standard Mark may be granted to manufacturers or producers may be obtained from the Bureau of Indian Standards. APPENDIX ( Clause 0.2 ) A POURING TEMPERATURE RANGES AND TYPICAL USES OF ANTIFRICTION BEARING ALLOYS The information given below is only to indicate to the purchaser the pouring temperature ranges and the typical uses of various alloys specified 111 this standard: Grade Pourfng Temperature in C to to to 400 Typical Uses For lining of petrol and diesel engine bearing cross-heads in steam engine and other bearings used at high speeds. (As the tin content drops in these alloys, their resistance to shock and heavy load increases ) Mostly used for repair jobs in mills and marine installations. ( Because of its long plastic range, it can be spread in as a wipe joint ) 6

11 Grade Pouring Temperature in C 500 approx 370 to to to to 390 Typical Uses IS: For underwater applications as a bearing alloy and gland packings For lining of bearings required for medium speeds, such as centrifugal pumps, circular saws, convertors, dynamos and electrical motors For low speed bearings, such as pulp crushers, concrete mixers and rope conveyors Heavy duty bearings, rolling mill bearing in sugar, rubber, paper, steel industries, etc. Bearings for diesel engines, crossheads in steam engines, turbines, etc. Generally replaces the high tin bearings for heavy duty jobs For mill shaftings, railway carriage and wagon bearings Used as a thin line overlay on steel strips where the white metal lining material is mm thick 7

12 BUREAU OF INDIAN STANDARDS Headquarters: Manak Bhavan, 9 Bahadur Shah Zafar Marg, NEW DELHI Telephones: , Telegrams: Manaksanstha ( Common to all Offices ) Regional Offices: Telephone Central : Manak Bhavan, 9 Bahadur Shah Zafar Marg. I NEW DELHI Eastern : l/14 C. I. T. Scheme VII M, V. I. P. Road, Maniktola, CALCUTTA Northern : SC , Sector 35-C, I CHANDIGARH I. T. MADRAS t ; 22: % Southern : C. Campus, TWestern : Manakalaya, E9 MIDC, Marol, Andhdri ( East ), BOMBAY Branch Offices: Pushpak. Nurmohamed Shaikh Marg, Khanpur, I AHMADABAD ,Peenya Industrial Area 1 st Stage, Bangalore Tumkur Road I BANGALORE Gengotri Complex, 5th Floor. Bhadbhada Road, T. T. Nagar, BHOPAL Plot No. 82/83. Lewis Road. BHUBANESHWAR i6. Ward No. 29, R.G. Barua Road, 5th Byelane, GUWAHATI C L. N. Gupta Marg ( Nampally Station Road ), HYDERABAD R14 Yudhister Marg. C Scheme, JAIPUR { /418 B Sarvodaya Nagar, KANPUR { ;: :; 32 Patliputra Industrial Estate, PATNA T.C. No. 14/l 421. University P.O.. Palayam ( TRIVANDRUM s Inspection Offices ( With Sale Point ): Pushpanjali. First Floor, 205-A West High Court Road, Shankar Nagar Square, NAGPUR Institution of Engineers ( India ) Building, 1332 Shivaji Nagrr, PUNE *Salor Office in Calcutta is at 6 Chowringhoo Approach, P. 0. Prinoep &)g Stroot. Calcutta tsalrs Office in Bombay is st Novelty Chambers, Grsnt Road, Bombav $Salrr Office in Bangalore is at Unity Building, Narasimh@rajr Square, Bangalora Reprography Unit, BIS, New Delhi, India