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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.

!"#$% '(%)

!"# $ %& #' (")* &" +#,-.Satyanarayan Gangaram Pitroda

Invent a New India Using Knowledge

/0)"1 &2 324 #' 5 *)6Jawaharlal Nehru

Step Out From the Old to the New

7"#1&"8+9&"), 7:1&"8+9&")Mazdoor Kisan Shakti Sangathan

The Right to Information, The Right to Live

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IS 432 Part 982 Reaffirmed 2004ndian StandardSPECIFICATION FORMILD STEEL AND MEDIUM TENSILE STEELBARS AND HARD DRAWN STEEL WIRE FORCONCRETE REINFORCEMENT

P RT H RD DR WN ST L WIRE

Third RevisionEighth Reprint SEPTEMBER 2006

Including Amendment No.1

UDe 669.14 426.124.3:666.982.24

@ opyrfght 1982BUREAU OF INDIAN STANDARDSMANAK BHAVAN 9 BAHADUR SHAH ZAFAR MARG

NEW DELill 110002Gr 2 September 1982

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IS a432 ( Part 1982ndian StandardSPECIFICATION FORMILD STEEL AND MEDIUM TENSILE STEELBARS AND HARD-DRAWN STEEL WIRE FORCONCRETE REINFORCEMENT

P RT H RD DR WN ST L W R

Third RevisionJoint Sectional Committee for Concrete Reinforcement, BSMDC 8

hairmtlnSUI G. S. RAO

RepresentingCentral Public WorksDepartment, New Delhi

Special Steels Ltd, Bombay

MembersSUPERIN rENDING ENGINEER (COO) Alternate toShri G. S. Rao)

DRJ. L. AJMANI The Tata Iron Steel Co Ltd,JamahedpurSHRI A. N. MITRA ( AlternateSHRIS.BANERJEE

Heady Gresham (India) Ltd, New DelhiNational Metallurgical Laboratory CSIR),JamshedpurSRRI N. C.JAIN Stup Consultants Ltd, BombaySHRI M. C. TANDON Alternateonlinued onpage 2 )

Steel Re-rolling Mills Association of India,.CalcuttaSUI S. N. CHANDA Metallurgical and Engineering Consultants (India)Ltd, RanchiSHRIR. D. CHOUDHARY AlternateCIlIEll ENGINEER (D R) Irrigation Department, Government of Punjab,. ChandigarhDmItOTOR (CD) AlternateDEPUTY DIREOTOR STANDARDS Research, Designs Standards Organization;(B S)-I LucknowAsSISTANT DIREOTOR STANDARDS. B S).II AlternateSRRIM. R. DOCTORSHRIS. G.JOSHI AlternateSRRIV. GULATISRRI P. GUl TE

e opyright 1982BUREAU OF INDIAN STANDARDS

This publication is protected under the ndian opyright Act XIV of 1957) andreproduction inwhole or in part by any means except with written permission of thepublisher shall be deemed to be an infringement of copyright under the said Act.

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IS : 432 rt U 1982 ontinued from page I

Tara Consulting Engineers, BombayPublic Works Department, Government of UttarPradesh, LucknowThe Concrete Association of India, BombayHRI Y. K. MEHTA

SHRI E. T. ANTIA AlternateDR P. K . MOH NTY T or Steel Research Foundation in India, CalcuttaDR I N G . P. K. B NERJEE AlternateSBRI A. D. NARAIN Roads Wing, Ministry of Shipping a n d T r an s po rtDR V. P. N R Y N SW MY Structural Engineering Research C en tr e C S IR ) ,Roorkee

embersSRRI M. P.jASUJA.

RepresentingResearch Development Centre for Iron Steel Steel Authority of India Ltd), RanchiS m u A. J AYAGOl AL Engineer-in.Chief s Branch, Army Headquarters Ministry of Defence )M .u R. Cn NDR SEKH R N AlternateSHRI S. Y. KHAN Killick Nixon Ltd, BombaySHRI P. S. VENXAT AlternateSRIll K. K . KHANNA National Buildings Organization, New DelhiSHRI K . S. SIIINIV S N AlternateSRIII M. N. KH NN Bhilai Steel Plant, .BhilaiSHUI C. D SGUPT A AlternaleSHRI S. N. M NOR HSlIRI N. N G R J AlternateSHRI R. K . MATHUR

G a m mo n I nd ia Ltd, Bombay

M. N. Dastur Co P) Ltd, CalcuttaHindustan Construction Co Ltd, Bombay

Director Ceneral, lSI Ex-officioMember

IRC Steels Ltd. CalcuttaTensile Steel Ltd, Bombay

SHRI Z. GEORGE AlternateSHRI S. N. PALSHRI SAUL Roy AlternateSnRlB.K.PANTHAKYSHRI P. V. NAIX AlternateDn G. P. SARASHRI A. C. Roy AlternaleSHRI T. SENSRRI SHIRISII H. SRAHSHRI M. S. P TH K AlternateSHRI C. N. SRINlV S N C. R. N ar av an a R ao , M ad ra sSHRI C N. R GH VlilNDR N Alternate .SHRI S. SUBR M NI N Cement Research Institute of India, N ew D el hiSHRI ANIL KUM R AlternateSHRI G. R M NDirector CivEngg)

SecretarySRIIIM.N.NEELAKANDBANAssistant Director Civ Engg ), lSI

2

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AMENDMENT NO. 1 DECEMBER 2004TOIS 432 PART 2 : 1982 SPECIFICATION FORMILD STEEL AND MEDIUM TENSILE STEEL BARSAND HARD-DRAWN STEEL WIRE FOR CONCRETEREINFORCEMENT

PART 2 HARD-DRAWN STEEL WIRE Third Revision

Page 3, clause 0.4 ) - Insert the following new para at the end of theclause:T he following test methods given in this Indian Standard are technicallyequivalent to those given in ISO Standards:

Sl No. Title IS No. ISO No.i)

ii)Mechanical testing of 1608metals - Tensile testingMethod for re-bend test 1716for metallic wires and bars

68927801

NOTE - For assessing the conformity of the reinforcement to the requirements laid downin this standard, this standard also permits the use of test methods covered by the aboveISO Standards.

CED54Reprography Unit, BIS, New Delhi, India

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IS : 432 Par t II 1982Indian Standard

SPECIFICATION FORMILD STEEL AND MEDIUM TENSILE STEELBARS AND HARD-DRA\VN STEEL WIRE FORCONCRETE REINFORCEMENT

PART HARD DRAW.\ ST L WIRE

Third RevisionOR E W 0 R D

0.1 This Indian Standard ( Part I I Third Revision was adopted by theIndian Standards Institution on 14 Maized bythe Joint Sectional Committee for Concrete Reinforcement had beenapproved by the Civil Engineering Division Council and the Structuraland Metals Division Council.0.2 This standard was first published in 1953 subsequently revised in1960 and 1966. The present revision has been taken up with a view tomodifying the earlier provisions in light of experience gained in workingto this standard by both manufacturers and users.0.3 Apart from incorporating an amendment issued to this standard, thisstandard adopts 51 units in specifying the various physical requirements.Further, certain provisions of the standard have been revised based on thelatest Indian Standards on physical and chemical tests for steel.0.4 In the formulation of this standard, due weightage has been given tointernational co-ordination among the standards and practices prevailingin different countries in addition to relating it to the practices in the fieldin this country.0.5 For the purpose of deciding whether a particular requirement of thisstandard is complied with, the final value, observed or calculated,expressing the result of a test or analysis, shall be rounded off inaccordance with IS : 2-1960 . The number of significant places retainedin the rounded off value should be the same as that of the specified valuein this standard.

Rules for rounding off numerical values revised .

3

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IS : 432 P a r t II 19821. SCOPE1.1 This standard Part II covers th e requirements of hard-drawn steelwire of medium strength for use as reinforcement in concrete.2. TERMINOLOGY2.0 For th e purpose of this standard, th e following definitions shall apply.2.1 Bundle - Two or more coils or a number of l engt hs properl ybound together.2.2 Co i l One continuous piece of wire as drawn in th e form of a coil.2.3 Elongation - The increase in length of a tensile test piece understress. The elongat ion at fracture is conventionally expressed as apercentage of the original g au ge len gth of a standard test piece.2. 4 Parce l Any quantity of finished wire whether in coils or, bundles presented for examination and test at anyone time.2.5 P r o o f St res s The stress which is just sufficient to produce, underload, a non-proportional eiongation eq ual to a specified percentage of th eoriginal gauge length.2.6 UltilUate Tensile St r e s s - The maximum load reached in a tensiletest divided by the original cross-sectional area of t he g au ge l en gt h portionof th e test piece.2.7 W i r e - Cold-drawn steel wire of circular cross section.3.M AN UF AC TU RE A ND CHEMICAL COMPOSITION3.1 The wire shall be cold-drawn from mild steel made by the openhearth, electric d up lex, acid bessemer, basic oxygen, or a combination ofthese processes. In case any other process is employed in th e manufactureof steel, prior approval of the purchaser should be obtained. In case basicoxygen process is employed for manufacture, th e n itro gen con tent of th esteel shall not exceed 8percent.

3.1.1 The ladle analysis when made in accordance with relevant partsof IS : 228* shall show that th e steel contains not more than 5 percentof sul phur and no t more than 5 percent of phosphorus.*Methods for chemical analysis of steels secondrevisi n) beinf,; issued in parts .

4

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IS: 43Z P a r t -19824. FREEDOM FROM DEFECTS

. 4,1 All finished wire, subject to the provisions of 7 shall be cleanly drawnto the specified size an d shall be sound, free from splits, surface flawsand other defects likely to impair its use for concrete reinforcement, andfinished in a workmanlike manner.5. NOMINAL SIZES5,1 Hard-drawn wire shall be supplied in the following nominal sizes:

Diameters of hard-drawn wire 2 65,3 0, 3 15, 3 55, 4 0,4 5,4 75, 5 0, 5 3, 5 6, 6 0 6 3, 7 1,7 5, 8 0, s o 9 5 and 10 mmNOTE - It is proposed to rationalize th e diameters of hard-drawn wire an dinclude only 3, 4, 5, 6. 8 an d 10 mrn in the n ex t revision of the stan dar d. Sizes otherthan these arc now incl uded to facilitate manufact urers and users to change over tothe rationalized sizes in this period,

6. TOLERANCES6.1 The tolerance on the nominal diameter shall be percent.

6,1.1 For purposes of determining whether the actual diameter of th ewire is within the specified tolerances, the diameter shall be d et er min edwit h a mi crometer by t ak in g two measurements at right angles to eachother at three places along a length o f not less than 250 mm and th eaverage of these six measurements shall be t ake n as th e diameter of thewire,6.2 Cutting Tolerances on Length - Cut ti ng tolerance for wire s ha llbe as follows:

engthOver 3 mLess than 3 m

olerance 1 3 m m 6 m m

7. PHYSICAL REQ.UIREMENTS7.1 The ultimate tensile stress, proof stress an d elongation of the wirewhen tested in accordance with 8,2 shall not be less than the followingvalues:

a) Ultimate tensile stress, N/mm2 570b) Proof stress 0 2 percent ), N/mm2 480c) Elongation over a gauge length of 7t8 where is the dia of wire,percent

5

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: 432 Par t II 19822 The wire shall withstand the reverse bend test specified in 8.3.TESTS

1 All test pieces of wire shall be selected by the purchaser or hisrepresentative eithera from the cuttings of lengths of wires or ends of coils of wires, orb if he so desires, from the coil or length of wire after it has

been cut to the required or specified length and the test piecetaken from any part of it.8.1.1 In neither case, the test piece shall be detached from the coil orof wire, except in the presence of the purchaser or his authorised

8.1.2 Before test pieces are selected, the manufacturer or supplier shallthe purchaser or his authorized representative with copies of therecords giving the number of coils or bundles in each cast with sizeswell as the identification marks whereby each coil or bundle of wirean be identified.Tensile Test - The ultimate tensile stress, proof stress and elongationf wire shall be determined in accordance with IS : 1.521-1972*. The testshall be cut from the finished material and straightened whereThe test pieces shall not be annealed or otherwise subjected tot treatment. Any slight straightening which may be required shall be

cold.3 Reverse Bend Test - Reverse bend test shall be made on a testcut from the finished product. The test piece shall not be annealedr subjected to any heat treatment before testing. The test piece shallone complete cycle of reverse bend around a pin of sizebelow without showing any sign of fracture when reverse bendst is carried out in accordance with the reg uirements of IS : 1716-1971

Dia pecimen Wire75 mm and underOver 7S mm

Dia of PinEqual to diameterof specimenTwice the diameterof specimen

Method for tensile testing of steel wire first revision . Method for reverse bend testing of steel wire fiHt rlvisi n .

6

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IS :432 P a r t D -19828. 4 Re-tests - Should anyone of th e test pieces first selected fail to passany of the tests specified in this standard, two further samples shall beselected for testing in respect of each failure. Should the test pieces fromboth these additional samples pass, th e material represented by the testsamples shall be deemed to comply with the requirements of that particular test. Should the test piece from either of these additional samplesfail, the mat-erial represented by the test sample shall be considered asnot having complied with this standard.8.5 Sampling - One tensile test and one bend test each shall be madefor ev ery 5 tonnes or less in an y parcel of wire.9. DELIVERY, INSPECTION AND T ES TI NG F AC IL IT IE S9.1 Unless otherwise specified, general requirements relating to the supplyof material, inspection and testing shall conform to IS: 1387-1967*.9.2 No material shall be despatched from the manufacturer s or supplier spremises prior to its being certified by the purchaser or his authorizedrepresentative as having fulfilled th e tests and requirements laid down inthis standard except where the bundle or coil c ontaining th e wire ismarked with the Certification Mark.9.3 The purchaser or his authorized representative shall be at liberty toinspect and verify the steel maker s certificate of cast analysis at th epremises of the manufacturer or the supplier; when the purchaser requiresan actual analysis of finished material, this shall be made at a placeagr eed to between the purchaser and the manufacturer or supplier.9.4 Manufacturer s Certificate - In the case of wires which have no tbeen inspected at the manufacturer s works, th e manufacturer or supplier,as the case may be, shall supply the purchaser or his authorized representatives with th e certificate stating the process of manufacture and also thetest sheet signed by th e manufacturer giving the result of each mechanicaltest and the chemical composition, if required.. Each test sheet shallindicate t he n um be r or identification mark of th e cast to which it applies,corresponding to th e number or identification mark to be found on thematerial.10. IDENTIFICATION AND MARKING10.1 The manufacturer or supplier shall have ingots, billets and wires, orbundles of wires marked in such a way that all finished wires can be

Specification for g en er al requirements for the s upply of metallurgical materialsfirst recision}7

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IS : 432 Par t 1982traced to the cast from which they were made Every facility shall begiven to the purchaser or his authorized representative for t racing thewires to the cast f rom which they were made10.2 BIS Certification MarkingThe product may also be marked with Standard Mark.10.2.1 The use of the Standard Mark is governed by the proV S ns ofBureau of Indian Standards Act 986 and the Rules and Regulations madethereunder. The details of conditions under which the licence for the use ofStandard Mark may be granted to manufacturers or producers may be obtainedfrom the Bureau of Indian Standards.

8

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