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( Reaffirmed 1994 )

8/4/2019 IS code 6


IS : 6 - 1983

Indian Standard

SPECIFICATION FOR

MODERATE HEAT DUTY FIRE CLAY

REFRACTORIES, GROUP ‘A’

( Fourth Rev ision )Refractories Sectional Committee, SMDC 18

Chairman

DR D. N. NANDI

Members

Representing

Kum ar dhu bi Fireclay & Silica Works Ltd, Calcut ta

DR G. D. SIN GH ( Alfcrnofc t oDr D. N. Nandi ) ’

SHRI P. S. V. AXANPHAXARA- Engineering & Mineral Industr ial Research Labora-

YANA tory, Bangalore

SHRI D. K. BINERJ EE Indian Iron & Steel Co Ltd, Burn pur

SHKI A. I(. MUKHE RJ EE ( Alfernate )

SHRI BHARAT BI~AS~AR Ishwar Industries Ltd. New Delhi

SHRI RAJ EE V BRAS~AR ( Aifernafe )

DR A. K. BOSE Associated Cemen t Compa nies Ltd, Bomba y

SH RI M. R. VINAYAICA ( Alfcrnafc I )

DR .4. K. CHXI’TERJEE ( Alternate II )

SHR~ S. K. CHATTERJ EESteel Aut hority of India Ltd (Dur gapu r Steel

Plant ) , Durgapur

SHRI P. K. ROYCHOWDRURY ( Alfernatc )

SHRI B. K. P. CHHIBBAR Steel Auth ority of India Ltd ( Boka ro Steel Plant ),

Bokaro Steel City

SRRI A. S. KRAL~HO ( Alter na te )SHRI M. H. DALJ IIA Orissa Cemen t Ltd, Rajgangpu r

SHRI K. K. PE ASAD ( Al~ernale )

S~HI S. K. Das Directorat e Genera l of Supplies and Disposals

SRRI 1~. N. SbHA ( Ahnate )

( In spection Wing ), New Delh i

DEP UTY ~DIR~CTC>K ( MET )-I Ministr y of Railways

RDSO. Lucsrrow&EXIST & METALLURGIST

( SF 1 CLW. CHICTARANJAX I Alternate 1__SHRI f). M. G~&A

SHR~ T. K. GROSE ( Afternate )

‘Belpaha r Refra ctories Ltd, Belpaha r

SHRI A. V. HINGORA~I Steel Aut horit y of Ind ia Ltd ( Alloy Steels Plan t ),

SHRI S. K. J HUN .IHUNWALA

DurgapurOrissa Industries Ltd, Rourkela

SHRI M. M. Sanu ( Alternate )

( Continued on page 2 )

@ Copyright 1983

INDI AN STANDARDS INSTI TUTION

This publicat ion is protected un der th e Indian Copyr igh, ACI ( XIV of 1957 ) and

repr oduction in whole or-in par t by an y mea na except with writt en perm iaaion of th e

publisher ah all be deemed to be an infringement of copyright under the said Act.

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IS : 6 - 1983

( Contbued from pap 1 )

dfr&crr Refircscnting

S,IF.I S. R. KHAXS_< Dire;t;;&lEeneral of Technical Development,

ljH,,I R. S.\CHDTW ( df/CVJQ/t )

SHRJ I. C. Mom Steel Authority of India Ltd, Rourkela Steel plant,

RourkelaSHRI R. K. S ASOHl ( ithernolc’

SHRI S. I i . hfoH 4NrT Ministry of Defence ( DGOF )SJ-~RI N. C. ~~IXHERJEE India Fir&ricks & Iwulation Co Ltd, Marx

SHI~I V. S. BHUT.~ ( .flk-rJ~d~)

SHRI s. K. ~~UKJiEI IJ I :E Bharat Refractories Ltd, Bokaro Steel C:it)

SHRI H. N. ?~PATHI ( A[frmnle )SHRI J. R. K. M~-J~YH~- Harry Refractory & Ceramic Works Pvt Ltd.

Calcutta; and Indian Refractory Makers Aswcia-

tion, CalcuttaSHXI~. C. S.\na ( Abern&) Harry Refractory & Cwamic \\-arks Pvt Ltd,

CalcuttaSH~I R. ,C. N.\xI,Y M. N. Dastur & Co (P) Ltd, Calcutta

SHRI A. K. GJ~OSH ( .-lltmmfc)DR T. D. PAXD;\ Dalmia Institute of Scientific and Industrial

DR N. SAHOO ( Alter,~~tc )

DRT.V. PR.ASAII

SHRI B. Ra.\r.~r~~~x~r..~s

Research, Rajgangpur

Engineers India Ltd, New DelhiMetallurgical & Engineering Consultants ( India )

Ltd. KanchiSHI~I T. B. SINCK ( rlllernnte )

SHI~I R.MKSH CHASI) .I11 India Glass Manufacturers Federation.

New DelhiDn M. R. K. RAO Xationai Metallurgical Laboratory ( CSIR \.

JamshedpurSHHI P. C:. SI‘X ( .Iltcr,infe )

SlIRI A. K. S.~HA Sational Test House. CalcuttaSHRI Il. Kar~-s~:o i ,lltu,;nte )

SHRX 0. ?. S.kS uimlll Steel Xuthoritv of India Ltd, Retearch & Develop-ment Wing, New Delhi

SHRI 1;;. c. cti A’r’rE,<JEE ( i~krnnle )SKRI R. SANYARAS Bharat Heavy Electricals Ltd, Tiruchchirappalli

SHRI C. S. R. hnIXJTJlY-aX ( .-lhnate)hfinistry of Defcnce ( DGI ) Directorate of Produc-IfRI K. c. S1SH.X

tion and Inspection ( ?;avy )SH W R.\.TEsI)R.\ PJ~ ASAD ( .4l/rm zfe )

DR S. R. SIR-.\I: (:entral Glass & Ceramic Research Institute

SHllI K. R.\xes.\x ( .1Ilew& )( CSIR ): Calcutta

Dn n. V. St-r3R.P I<.\0SHRI K. S. .SW.%xU.< TRAX

hlinistry of Defence ( R&D ), Hyderahad

The Tata Iron 8; Steel Co Ltd, JamshedpurSARI B. x. C;HUSH ( .~fhrJJ~te ;I

%fnI B. s. \ ‘I?S;.\ TAH i\ M,.\ XI Steel Authority of India .Ltd ( Bhilai Steel Plant ),

Bhilai

SHHI B. ~~KEERJI

Senior Deputy Director ( Metals ), IS1

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Indian Standard

IS : 6 - 1983

SPECIFICATION FOR

MODERATE HEAT DUTY F\ RECLAYR.EFRACTORIES, GROUP ‘A’

( Fourth Revision )

0. FOREWORD

0.1 This Indian Standard ( Fourth Revision ) was adopted by theIndian Standards Institution on 21 April 1983, after the draft finalized

by the Refractories Sectional Committee had been approved by theStructural and Metals Division Council.

0.2 Fireclay refractories are classified into ‘high heat duty’ and ‘moderateheat duty’ refractories, the latter being sub-divided into t\vo groups,

namely, Group A and Group B on the baTis of certain well established

properties. This standard deals with moderate heat duty fireclay

refractories of Group A.

0.3 This standard was first issued in 1949 and subsequently revised in1953, 1958 and 1967. In this revision an additional variety of moderateheat duty fireclay refractories has been included and the requirements

for this have been specified separately as ‘Type 2 refractories. Thespalling resistance test has been retained in thisstandard as an optionalrequirement for both Type 1 and Type 2 refractories.

0.4 It is to be pointed out that although a riumber of tests have beenprescribed in this standard, it is not intended that all of them should becarried out in each case, as by a judicious application of some of thetests it. should be possible to judge the quality of bricks in a given lot.

However, the tests to be conducted in each case would depend upon the

service conditions for which the bricks are required. Purchasers are, /therefore, advised to indicate these conditions at the time of placing anindent or order.

0.5 This standard kkeps in view the manufacturing and trade practicesfollowed in the country in this field.

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IS : 6 - 1983

0.6 For the purpose of decidin- g 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 accord-

ance with IS : 2-1960*. The number of significant places retained in

1he 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 moderate heat duty burnt

fireclay refractories, Group ‘A’ for general purposes.

2. SUPPLY OF MATERIAL

2.1 General requirements relating to the supply of moderate heat dutyfireclay refractories shall be as laid down in IS : 1387-1967t.

2.2 The refractories shall be compact, of homogenous texture and free

from cracks, voids and other flaws. They shall be burnt evenly

throughout shall have no soft corners and have sufficient mechanical

strength.

3. TYPES

3.1 Moderate heat duty fireclay refractories Group ‘A’ shall be of thefollowing two types:

Type 1 - suitable for general applications, and

Type 2 - suitable for more critical application, like steel plant

usage.

4. CHEMICAL COMPOSITION.f

4.1 The alumina and silica contents of both the types of-refractories,when determined in accordance with the methods given in IS : l-527-1960:, shall be as follows:

Percent

Alumina, Min 30

Silica, Max 65

NOTE - The aluminium content may also be determined.according to the methodsgiven in IS : 1335-1959s.

.-

*Rules for rounding off numerical values ( r&cd) .

tGcnera1 requirements for the supply of metallurgical materials (jrsl revision ).‘$Methods for chemical analysis of fireclay and silica refractory materials (jirfirst

recision ) .§Methods for direct determination of silica in refractory materials (first rcuision ).

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IS i 6 - l383

5. PH YSICAL TtiST RE~ QUIR EMENTS

5.1 Moderate heat ,duty fireclay refractories, when tested in accordancewith the test methods specified, shall conform to the requirements, givenin Table 1.

TABLE I PHYEICAL TEST REQUIREMENTS ,

SL CHARACTERWTI~

No.

REQUIREMENT TEST METROU~---_--h,---~ ( &SF TO PAlSOF

‘Me 1 Type 2 IS : I528-’ )

(3)

25z”5

Part 8

( for hand moul-ded shapes )

20 22’5 Part 417.5

( for hand moul-ded shapes )

30 30 Part 1

t1) (2)

i) Apparent porosity, percentby volume, &far

ii) Co!P?;~ng strength,

iii) Pyrometric cone equival-ent, standard cone

( ASTM ) No.,Mitt

iv) Refractories under load,taT, Min

v) Permanent linear changeefter heating at 1 350°C

3r 5 h, percent, Max

vi) Spelling resistance test

1 300 1 300

1.0 1.0

Subject to Subject tomutual mutual

agreement agreement

Part 2

Part 6

Nom - The requirements of apparent porosity and cold crushing strength in caseof special shapes to be hand-moulded, conforming to Type 1, shall be as agreed tobetween the purchaser and the manufacturer.

NOTE 2 - 1 MPa = 10.2 kg/cm*.

*Methods of sampling and physical tests for refractories:

Part 8 Determination of apparent porosity (first revision ).Part 4 Determination of cold crushing strength (first revision ).

Part 1 Determination of pyrometric cone equivalent ( BCE ) or softening point( second revision ).Part 2Part 6

Determination of refractoriness under load (jrst revision ).

Determination of permanent change after reheating (jrst rezirion .

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IS:601983

6. TOLERAFCE dN SIZE

6.1 Variation from specified dimensions, covering both warpage andshrinkage, shall be allowed to the extent of 12 percent nor &l mmwhichever is greater for Type 1 refractories and f 1 percent or -&1 mmwhichever is greater for Type 2 refractories.

6.2 The size tolerance for hand-moulded shapes shall be as mutuallyagreed to between.the purchaser and the manufacturer.

7. SAMPLING

7.1 Representative samples shall be drawn according to the scheme ofsampling given in IS : 1528 ( Part 7 )-1974*.

8. MARKING

8.1 Each refractory brick or shape shall be clearly marked with themanufacturer’s name or trade-mark.

8.1.1 Refractory brick or shape may also be marked with the IS1Certification Mark.

NOTE - The use of the ISI~Certification Xfark is governed by the provisions ofthe Indian Standards Institution ( Certification hlarks ) Act and the Rules and Regu-lations made thereunder. The IS1 Mark on products covered by an Indian Standard

conveys the assurance that they have been produced to comply with the require-ments of that standard under a well-defined sxstcm of inspection, testing and qualitycontrol which is devised and supervised by IS1 and operated by the producer. IS1marked nroducts are also continuouslv checked bv IS1 for conformitv to thatstandard’as a further safeguard. Details of conditions under which a licence for theuse of the ISI Certification Mark mav be granted to manufacturers or processors,may be obtained from the Indian Standards Institution.

*Methods of sampling and physical tests for refractory materials: Part 7 Methods ofsampling and criteria for conformity (first rcuision .

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is code 6

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