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है”ह”ह

IS 9805 (1981): High conductivity copper castings [MTD 8:Copper and Copper Alloys]

IS I 9805 - 1981

Indian Standard SPHCIFICATION FOR

HIGH CONDUCTIVITY COPPER CASTINGS

Copper and Copper Alloys Sectional Committee, SMDC 11

Chairman Reprrsenfing

DR L. R. VAIDYANATE Indian Copper Information Centre. Calcutta

Members

SHKI DEV KUMAR AQ~ARWAL Bralco Metal Industries Pvt Ltd, Bombay SHRI V. R. GADRE ( Alfcrnafc )

SHRI S. N. BARNA SH~I N. M, BAWNA ( Altcrnets )

Covcntary Metals Rajaathan Pvt Ltd. Jodhpur

SHRI J. N~ogaH BHATT Indian Telephone Industries Ltd, Bangalore SHRT A. DWARKANATH ( A&Y& )

SHHI V. N. Brrrnx Directorate General of Ordnance Factories, Calcutta SHRI S. K. MOHANTY ( Altrrnate )

SHRI S. N. GHANHA Bengal Ingot Co Ltd, Calcutta SHRI S. K. DAS

SHHI S. C. PAUL ( Altrrnata ) Ministry of Dcfence ( DGI )/DPI (N)

SHRI P. Gnosn Indian Cable Co, Jamshedpur SHRI Tnrr,otr Srriau ( Alternafc )

SHRI A. K. Gun.4 Directorate General of Supplier & Disposals, New Delhi

SHHI A. V. HABNE Bharat Heavy Elcctricals Ltd. Sccunderabad SHR~ T. MUIZHERJIE ( Aknatc I ) SKRI K. N. WADHWA ( A&ma/e 11 )

SHRI D. P. JAIN Saru Smelting Pvt Ltd, Meerut SHRI D. N. CHAKRABORTY ( Alfcrnate )

SHHI S. L. JAIN Alcobcx Metals (P) Ltd, Mccrut SHRI S. RAMAKRIRHNAN ( Altdrnars)

SHRI F. A. A. JABDANWALI.A Indian Standard Metal Co Ltd, Bombay SHRI C. CHATTERJIW ( Alternate )

SHRT S. K. KHAN~ERAR Vanaz Engineers (P) Ltd, Punt SHRI A. S. SullYnN.4RAIN ( Alternate )

SHRI J. MAHWAHA Ministry of Steel & Mines, New Delhi; and Hindustan Copper Ltd, Ghatsila

DH S. K. B~swns ( Alternats )

( Continued on pap 2 )

@ Copyright 1981

INDIAN STANDARDS INSTITUTION

This publication is protected under the Indian Copyright Act ( XIV of 1957 ) and reproduction in whole or in part by any mcanl except with written permission of the publisher shall be deemed to be an infringement of copyright under the laid Act,

IS : 9805 l 1981

( Continued from pagr 1 )

Members

SE~RI LAXAMAN MISHRA

Repmenting

Directorate Genera 1 of Technical Development, New Delhi

SHRI T R. MOHAN RAO ( Alternate ) SHRI B. M. MISTRY Ministry of Finance SHRI A. K. MITHA National Pipes & Tubes Co Ltd, Calcutta SHRI S. V. NADKARNI Advani Oerlikon Ltd, Bombay

SHRI S. K. SIXNQUPTA ( Alternate ) SHRI A. T. PAL Ministry of Dcfence ( R & D )

SHRI I. N. BHATIA ( Altcrnotr ) SHRI H. S. PARQHI Kamani Metals and Alloys Ltd, Bombay

SHBI A. H. SABHACHANDANI ( Alternate ) DR E. G. RAMACHANDRAN Indian Institute of Technology, Madras SHRI P. S. RAIKASWAMY Bhar&;yba~etallurgical Corporation Pvt Ltd,

SHRI M. K. RAO Indian Non-Ferrous Metals Manufacturers Associa- tion, Calcutta; and The Binani Metal Works Ltd, Calcutta

SHRI B. NAQOHAUDEURI ( Ahrnatc ) REPRESENTATIVE Institution of Engineers ( India ), Calcutta; and

Khctri Copper Complex, Jodhpur SHRI S. K. ROY Ministry of Defence t DGI )

SHRI P. K. L. P. NIMANKAR ( Alternote ) SHRI D. K. SEHOAL Leader Engineering Works, Jullundur

SHRI V. K. CHOUDHURY ( Altarnatr ) SENIOR CHEMIST & METALLUR- Ministry of Railways

oIST, CENTRAL RAILWAY, BOMBAY

DEPUTY DIRECTOR ( MET )-II RDSO, LUCKNOW ( Alternaf~ )

SHRI S. C. SIVARAMAKRISHNAN National Metallurgical Laboratory, Jamshedpur SHRI N. S. SURANA Multimetals Ltd, Calcutta SERI S. S. VAIDYANATHAN J. B. Metal Industries Pvt Ltd, Bombay SHRI C. R. RAMA RAO, Director General, ISI ( Ex-o&cio Membsr )

Director ( Strut & Met )

Secretary

SHRI 0. N. DASQUPTA Deputy Director ( Met ), ISI

2

IS I 9805 - 1981

Indian Standard SPECIFICATION FOR

HIGH CONDUCTIVITY COPPER

0. FOREWORD

CASTINGS

0.1 This Indian Standard was adopted by the Indian Standards Institution on 24 April 1981, after the draft finalized by the Copper and Copper Alloys Sectional Committee had been approved by the Structural and Metals Division Council.

0.2 High conductivity copper, because of its high thermal and electrical conductivity, finds extensive application in areas where these properties are of prime importance, such as electrode clamps for arc furnaces, conductor roll for high tension switchgear, short circuiting rings of induction motor, coil lugs for electrical machines, lance nozzle tips for L.D. process, copper hose, cooling rings for blast furnace, etc.

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 : 2-1960*. The number of significant places retained in the rounded off value value in this standard.

1. SCOPE

1.1 This standard covers ductivity copper castings,

2. TERMINOLOGY

should be the same -as that of the specified

the requirements of two grades of high con-

2.0 For the purpose of this standard, the following definitions shall

apply-

*Rules for rounding off numerical values ( rmiscd ).

3

IS : 9805 - 1981

2.1 Cast - A cast is to be taken as either:

a) The product of one furnace melt,

b) The product of one crucible melt, and

c) The product of a number of furnace or crucible melts where such are aggregated and mixed prior to casting.

2.2 Melt - The quantity of metal melted in a crucible or furnace at one time.

3. SUPPLY OF MATERIAL

3.1 The general requirements relating to the supply of material shall be as laid down in IS : 1387-1967*.

4. FREEDOM FROM DEFECTS

4.1 The casting shall be clean, sound and free from harmful defects such as blow holes, porosity, shrinkage, cracks, etc.

5. INSPECTION PROCEDURE

5.1 Castings may be inspected in accordance with IS : 1408-1968T.

6. CHEMICAL COMPOSITION

6.1 The material when analysed in accordance with IS : 440-1964: shall have the chemical composition as given in Table 1.

7. ELECTRICAL CONDUCTIVITY/RESISTIVITY

7.1 Resistivity/conductivity when referred to in this standard is volume resistivity/conductivity. Each resistivity/conduclivity test specimen shall normally originate as a casting of suitable size poured during the cast- ing period of the furnace. The measurement of resistivity/conductivity when measured in accordance with IS : 8130-19763 shall be as given in Table 2.

*General requirements for the supply of mrtallurgical materials (J;rrr rcuirion ). tRecommcndcd procedure for inspection of copper-base alloy sand castings (Jirsr

rruision ). $Methods of chemical analysic of copper ( rrubrd ). §Sprcification for conductors for insulated electric cables and flexible cords.

4

1s t 9805 - 1991

TABLE 1 CHEMICAL COMPOSITION

( CIcurr 6.1 )

CONSTITUENTB GBADE 1 GSUDE -2

Copper, Min

Lead, Mox

Bismuth, Max

Antimony, Mox

Iron, Max

Phosphorus, Maz

Arsenic, Mox

Nickel, Mav

Tin, Max

Selenium + Tellurium, Max

Tellurium, Max

Total of all impurities excluding silver and oxygen, Max

Total of impuritier excludin rilver, nickel, arsenic an 8 phosphorus, Mar

9990

4~005

0’0025

-

0’04

*99w

@Ol

0901

0.005

0’03

0.03

0~0s

0.10 q

0’01

0.02

0.01

0’06

NOTE - Oxygen should be limited to 0’06 percent subject to agreement between the supplier and the purchaser.

*Includes silver. -

TABLE 2 ELECTRICAL CONDUCTIVITY* ( Claus8 7.1 )

GRADE 1 GRADII 2

Electrical conductivity percent, 9090 8090 IACS, Min

*The value of 1,724 1 micro-chm-cm at 20’ C is the International Annealed Copper Standard value for the resirtivity of annealed copper and corresponds to 100 percent IACS.

5

IS : 9805 - 1981

8. PRESSURE TEST

8.1 If the castings are to withstand some specified pressure, the pressure test to be done may be prescribed by mutual agreement between the supplier and the manufacturer. Such pressure castings shall not be plugged, welded, or impregnated without the written permission from the purchaser.

NOTE - Generally the casting is tested at hydraulic pressure which is 1’5 times the working pressure specified, for a period of 10 minutes without leakage or sweating.

9. MARKING

9.1 Each casting shall have manufacturer’s identification stamp and if required, grade number may also be marked.

9.1.1 The castings may also be marked with the IS1 Certification Mark.

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 Rcgu- lations made thereunder. The IS1 Mark on product$ covered by an Indian Standard convevs the assurance that thcv have been woduced to com~lv with the rcouiremcntr 1 ofthat standard under a well-defined system of inspcct;o& testing and qualitv control which is devised and supervised by IS1 and operated by the producer. IS1 marked products are also continuously checked by ISI for conformity to that standard as a further safeguard. Details of conditions under which a liccnce for the use of the IS1 Certification Mark may be granted to manttfacturers or processors, may be obtained from the Indian Standards Institution.

6‘