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IS 25 (1979): antifriction bearing alloys [MTD 9: Lead,Zinc, Cadmium, Tin, Antimony and their Alloys]

Is : 25 - 1979

Indian Standard

SPECIFICATION FOR ANTIFRICTION BEARING ALLOYS

( Third Reuision )

Fil’th Reprint APRIL 1996

UDC 669.018.24

tg Copyright 1980

BUREAU OF INDIAN STANDARD S MANAK BRAVAN, 9 BAMDUR SHAH ZAFAR MARG

NEW DELHI 110002

Gr2 Aprir 1980

IS : 25 - 1979

Indian Standard

SPECIFICATION FOR ANTIFRICTION BEARING ALLOYS

( Third Retiision )

Lead, Zinc, Tin, Antimony and Their Alloys Sectional Committee, SMDC 12

Chairman Representing

SHRI F. A. A. JASDANWALLA 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 Laboratory ( CSIR ),

Jamshedpur 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. Calcutta

(Continued on page 2 )

@ CopyfiRht 1980

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.

IS : 25 - 1979

(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

IS : 25 - 1979

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 1966. 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, express- ing 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.

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: 1387-1967t.

3. CHEMICAL COMPOSITION

3.1 The material when analyzed in accordance with IS : 1409-1959: 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

TABLE 1 CHEMICAL COMPOSITION OF ANTIFRICTION BEARING ALLOYS tl

( CImuu 1.1 wld 3.1 ) k I

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,

(1) 90

84

75

P 69

(2) (3) (4) (5) (6)

9OJuin 65-75 @3Mux 2-5-3-5 -

84hfin PO-11.0 W3Max 5~0-~0 -

749769 10’0-12-0 Remainder 275-3-25 -

68s7OQ 0.2 Max O-3 MUJS 1~0-1*4 -

60

20

590-61.0 11912-O Remainder 25-3.5 -

19+21*0 14lXl&O Remainder 1.25-1.75 -

10 9’0-11’0 13Xk15.0 Remainder @50-1-O -

6 5.0-7’0 14’0-1~0 Remainder 0%&1*20 O-80- 0.70. 0s - 1.50 I.50 0.80

5

1

45-5.5 14%160 Remainder @30-@70 -

O-75-125 15.@1&0 Remainder @5 Max - - 0.8-1.1 -

(7) (8) (9)

- - -

- - 29.0. 31.0

- - -

(10) (11) (12) (13) (14) (15)

0.08 0.10 0.005 0’05 0’008 0.05

0.08 0.10 ‘OW5 0.05 0’008 0.10

0.08 0.10 OW5 0’05 Of)08 0.10

0.10 0.15 o-005 0.08 - 0.10

0.10 0.15 0905 0.08 0.01

0.10 0.20 0’005 0.10 0.01

O-10 Or20 0.005 0.10 0.01

0’10 - 0.05 0.10 005

0.10 0.25 WOO5 0.10 0.01 0.10

@IO - 0*005 @lo 001 0.10

0’10

0.10

@lo

PERCENT, Max

(16)

0.15

0.17

0.17

0.22

0.22

0.26

0.28

0.15

0.28

0.28

IS:25-1979

4. FREEDOM FROM DEFECTS

4.1 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 manufac- turer, 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.

7.1.1 The method of preparing samples for chemical analysis from the ingots selected under 7.1 shall be in accordance with IS : 1409-1959”‘.

7.2 Sampling for Fracture Test - Unless otherwise agreed to between the purchaser and the manufacturer, sampling shall be done as given in 6.1.

8. RE-TESTS

8.1 Re-test for Chemical Cqmposition - If the sample prepared under 7.1.1 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 require- ments, 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

Is:25-1979

9 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 A

( Clause 0.2 )

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

Typical Uses

90 340 to 390 84 430 to 460

75 360 to 400

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

IS:25-1979

Grade

69

60

6

Pouring Temperature

in “C

500 approx

370 to 400

370 to 410

500 to 530

350 to 390

Typical Uses

For underwater applications as a bearing alloy and gland packings

For lining of bearings required for medium speeds, such as centrifugal pumps, cir- cular 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, cross- heads 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 0.076 mm thick

7

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