is.432.1.1982 mild steel and medium tensile steel bars.pdf

8/18/2019 is.432.1.1982 MILD STEEL AND MEDIUM TENSILE STEEL BARS.pdf

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IS : 432 Par t I ) - 1 9

Indian StandardSPECIFICATION FOR

MILD STEEL AND MEDIUM TENSILE STEEL RS AND HARD-DRAWN STEBLWIRE FOR

CONCRETE REINFORCEMENTP RT I MILD STEEL N D MEDIUM TENSILE STEEL RS

Third Revision

Fifth Reprint DECEMBER 1992

UDC 669-141·24-422+669-14·018 295-422: 666-982·24

J Copyright 1982

U R E U O F I N D I N S T N D R D S

MANAK BHAVAN, 9 BAHADUR SHAH ZAFAR MARGNEW DELHI 110002

Gr June 1982


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IS : 432 ( Par t I ) • 1982

Indian Standard

SPECIFICATION FORMILD STEEL AND MEDIUM TENSILE .STEELBARS AND HARD-DRAWN STEEL WIRE FOR

CONCRETE REINFORCEMENTPART I MILD STEEL AND MEDIUM TENSILE STEEL BARS

Third Revision

Joint Sectional Committee for Concrete Reinforcement, BSMDC 8

( ontinued onpage 2 )

RepTeJentingCentral Public Works Department New Delhi

hairmanSHRl G. S. RAO

MembersSUl EttINTENDING ENGINEER ( CD O ) ( Alternate to

Shri G. S. Rao )D a ] . L. AJMANI The Tata Iron Steel Co Ltd Jamshedpur

SHRI A. N. MITRA ( Alternate .SHRI S. BANERJEE Steel Re-rolling Mills Association of India CalcuttaSHRI S. N. CHANDA Metallurgical and Engineering Consultants ( India )

Ltd RanchiSHnI R. D. CnOUDIIARY ( Alternate

CHIEF ENGINEER ( D R Irrigation Department Government of Punjab;Chandigarh

SHRI A. JAYAGOPAL

Heatly Gresham ( India Ltd New DelhiNational Metallurgical Laboratory ( CSIR ),Jamshedpur

SaRI N. C. JAIN Stup Consultants Ltd Bombay. SHRI M. C. T ANDON ( Alternate

SHRI M. P. JASUJA Research Development Centre for Iron Steel( Stee l Authority of India Lt d ), Ranchi

Engineer-in-Chief s Branch, Army Headquarters,New Delhi

MAJ R, CHANDRASEKHARAN ( Alternate

DIRECTOR ( CD ) Alternate )DEPUTY DIR.ECTOR STANDARDS Research, Designs Standards Organization,

( B S )-1 LucknowASSISTANT D IR E C To n

STANDARDS ( B S )-11 ( AlternateSaRI M. R. DOCTOR Special Steels Ltd Bombay

SHRI S. G. JOSHI ( Alternate

SHRI V. GULATISURI P. K. GUl TE

opyright 1982BUREAU OF INDIAN STANDARDS

This publication is protected under th e ndian flpyllght Act XIV of 1957reproduction in whole or in part by any means except with written permission of thepublisher shall be deemed to be an infringpment of copyright under the said Act


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Public Works Department, LudmowThe Concrete Association of India, Bombay

IS : 432 r t I - 982

ontinued from page I

embers RepresentingSURI S. Y. KHAN Killick Nixon Ltd, Bombay

SHRI P. S. VENXAT AlternateSHRI K. K KUANNA National Buildings Organization, New Delhi

SURI K. S. SRINIVASAN AlternateSaar M. N. KUANNA Bhilai Steel Plant, Bhilai

SHRI C. DASGUPU AlternateSHRI S. N. MANOHAR Tata Consulting Engineers, Bombay

SRRI N. NAGARAJ AlternateSURI R. K. MATHURSURI Y. K. MEHTA

SURI E. T. ANTIA. AlternateDR P. K MORANTY Tor Steel Research Foundation in India, Calcutta

DR ING. P. K. BANERJEE Alternate .SURI A. D. NARAIN Roads Wing, Ministry of Shipping and TransportDR V. P. NARAYANASWAKY Structural Engineering Research Centre C S I R ,

RoorkeeSHRI Z. GEORGE Alternate

SURI S. N. PA L M. N. Dastur Co P Ltd, CalcuttaSHRI SALIL Roy Alternate

SURI B. K. P ANTHAKY Hindustan Construction Co Ltd, BombaySHRI P. V. NAIK Alternate

DR G. P. SAH I. Gammon India Ltd , BombaySH,RIA. C. Roy Alternate

SHRI T. SEN e Steels Ltd, CalcuttaSURI SHIRISHH. SUAH Tensile Steel Ltd, Bombay

SHRI M S. PATHAK AlternateSHRI C. N. SRINIVASAN C, R. Narayana Rao, Madras

SHRI C. N. RAGHAVENDRAN AlternateSHRI S. SUBRAMANIAN Cement Research Institute of India, New Delhi

SHRI Asn KUMAR AlternateSURI G. RAMAN Director General,BIS -ojfi io Mnnlur

Director Civ Engg

Se TdtlrySHRi M. N. NEELAKANDHAN

Assistant Director Civ Engg BIS

2


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AMENDMENT NO. 1 DECEMBER 2004TO

IS 432 PART : 1982 SPECIFICATION FORMILD STEEL AND MEDIUM TENSILE STEEL BARSAND HARD DRAWN STEEL WIRE FOR CONCRETE

REINFORCEMENTP RT MILD STEEL ND MEDIUM TENSILE STEEL B RS

Third evision

Page 4 clause0.7

- Insert the following new para at the end ofthe

clause:

The following test methods given in this Indian Standard are technically .equivalent to those given in ISO Standards:

Sl No Title IS No ISO No

i

ii

Mechanical testing of 1608metals - Tensile testing

Method for bend test 1599

6892

10065

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.

CED 54Reprography Unit BIS New Delhi. India


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IS : 432 P a r t I ) - 1982

Indian Standard

SPECIFICATION FORMILD STEEL AND MEDIUM TENSILE STEELBARS AND HARD-DRAWN STEEL WIRE FOR

CONCRETE REINFORCEMENTPART I MILD STEEL AND MEDIUM TENSiLE STEEL BARS

Third Revision)

o. R E W R

0.1 T hi s I nd ia n Standard Part I ) Third Revision) was adopted by theIndian Standards Institution on 31 March 1S 82 after the draft finalizedby the Joint Sectional Committee for Concrete Reinforcement had beenapproved by th e Civil Engineering Division Council and the Structuraland Metals Division Council.

0. 2 This standard was first published in 1953 and subsequently revisedin 1960 and 1966. The present, revision has been taken up with a viewto modifying the earlier provisions in the light of th e experience gainedduring the use of this standard by both manufacturers and users.

0.3 This standard adopts SI units in specifying the various physicalrequirements. Further, some of the provisions have been revised basedon the latest Indian Standards, such as IS : 226-1975*, IS : 961-l975t,IS : l599-l974t, IS : l608-l972§, IS : 1732 197111 IS : 1762 Pa r t 1) 9 7 ~and IS : 1977-1975**.

0. 4 The concrete reinforcement having an ultimate tensile strength ofno t less than 540 mm has been categorized as medium tensile steel •instead o f high tensile steel see IS : 96l- l975t) in this standard. Inconcrete reinforcement, the term h igh tensile steel is, as a general

*Specification for structural steel standard quality) i th revision ).tSpecification for structural steel high tensile) se ond revision).:j:Method for bend test for s teel products other than sheet, strip, wire and lube first

revision ).§Method for tensile testing of steel products first revision).IIDimensions for round and square steel bars for structural and general engineering

purposes first revision).~ C o d efor designation of steel: Part I Based on letter symbols first revision).·*Specification for structural steel ordinary quali ty) se ond reois ou ).

3


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IS : 432 ( Par t I ) • 1982

practice, used mean steel having tensile strengths in a still higherrange, say 1 000-2 Q Njmm 2 which is generally used in prestressedconcrete.

0.5 Grade I I mild steel bars are not recommended for use in structureslocated in earthquake zones subjected to severe damage and forstructures subjected to dynamic loading (other than w in d l oa di ng ),such as railway and highway bridges see IS : 1893-1975* andIS : 1977-l97.5t).

0.6 \\ elding of reinforcement b an covered in this specification shall .done in accordance with the requirements o r I S : 2751-1966t.

0.7 In the formulation o f this s tandard , due weightage has been given tointernational coordination among t he s ta nd ar ds a nd practices prevailingin different countries in addition to relating it to the nract ices in the fieldin this country.

0. 8 For the purpose of de ci din g w het he r a particular requirement ofthis standard is compl ied wi th , 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§. 'Ehe number of significant places retained in therounded off value should the same as that of the specified value in thisstandard.

1. SCOPE

1.1 This standard ( Part I ) covers the requirements of mild steel andmedium tensile steel plain bars in round and square sections for use asreinforcement in concrete.

2. TERMINOLOGY

2.0 For the purpose of this s tan dar d, the following definitions shallapply.

2.1 B ar - A hot-rolled bar of steel of circular or square cross-section.

2.2 Bundle - Two or more co i l s or a number of lengths properlybound together,

2.3 o i l One continuous bar as rolled in the form of a coil.

Criteria for earthquake resistant design of structures thir revision ).t p e c i f i ~ t i o nfor structural steel ( ordinary quali ty) ( se ond rel ision ).tCode of practice for welding of mild steel ban used for reinforced concret e

.construction. Rules for rounding off numerical values ( rlllislfl

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IS : 432 Part I • 1982

2.4 Elongation - Increase in length of a tensile test piece under .stress.The elongation at fracture is conventionally expressed as a percentage ofthe original gauge length of a standard test piece.

2.5 Nom inal Size - The nominal size of a bar shall be the dimensionof the diameter of round bars and side of square bars.

2.6 Parcel - Any quantity of bars whether in coils or bundles, presentedfor examination and test at anyone t ime . 2.7 Ultim ate Ten sile S tres s - The maximum load reached in atensile test divided by the original cross-sectional area of t he gauge lengthportion of the test piece.

8 Yield Stress - Stress tha t is, load per unit cross-sectional area)

at which elongat ion firstoccurs

in the test piecewithout

increasingthe

load during tensile test. In the case of steels with no such definite yieldpoint , the yield stress is th e stress under the prescribed testing conditionsat which the: observed increase in the ga ug e len gt h is 1/200 of the gaugelength when the rate at which the load applied is not more than 5N/mm /s when approaching the yield stress.

3. TYPES AND GRADES

3.1 Reinforcement supplied in accordance with this standard shall beclassified into th e following types:

a Mild steel bars, andb Medium tensile steel bars.

3.1.1 Mild steel bars sha ll be supplied in th e following two grades:

a Mild steel bars, Grade I; andb MiLl steel bars, Gracie II.

4. MANUFACTURE AND CHEMICAL COMPOSITION

4.1 Steel for mild steel reinforcement bars, Gracie I shall be manufacturedand have the chemica l composition in accordance with the r equ ir em en tsof Steel Designation Fe 41O-S ofJS : 226-1975*.

4.2 Steel for mild steel r einforcement bar s, Grade I I shall be manu-factured and have the chemical composition in accordance with therequirements of Steel Designation Fe 410-0 ofIS : 1977-1 975t.

·Specification for structural steel standard qual i ty) i t h revision .tSpecification for structural steel ordinary quali ty) second revision

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5, 6, 8, 10, 12, 16, 20, 22, 25, 28.32, 36, 40, 45 and 50 mm

be in accordance with IS : 1732-

IS : 432 Par t I ) • 1982

4. 3 Medium tensile steel bars shall be manufactured and have thechemical composition in accordance with the requirements of SteelDesignation Fe 540 W-HT ofIS : 961-1975*

5. FREEDOM FROM DEFECTS

5.1 All finished bars shall be well and cleanly rolled to the dimensionsand weights specified. They shall be free from cracks, surface flaws,laminations and rough jagged and imperfect edges and all other harmfuld e r e ~ .

6. NOMINAL SIZES AND MASS

6.1 Sizes - Mild steel and medium tensile steel bar s sha ll be supplied inthe following nominal sizes:

Diameter of round bars or sideof square bars

6.2 Mass - The mass of bars shall1971 t.7. TOLERANCES

7.1 The rolling and cutting tolerances shall be in accordance with IS :1852-1973t.

8. PHYSICAL REQ.UIREMENTS8.1 The ultimate tensile stress, yield stress and percentage elongationwhen determined in accordance with 9.2 shall be as given in Table I;

8.2 The bars shall also withstand the bend test specified in 9.3.

9. TESTS

9.1 Selection and Prepara t ion o f Test S a m p l e s . - Unless otherwise specified in this standard the requirements ofIS : 226-1 S75§ shall

apply.

9.1.1 All test pieces of bars shall be selected by the purchaser or hisauthorized representative, either:

a) from the cut ting of bars; or

*Specification for structural steel h igh tensile ) se on revision ).tDimensions for ro und a nd square steel bars for s tructural an d general engineering

purposes first mi Hon ).tSpecification for rolling an d cutting tolerances for hot-rolled steel products se otut

revision ).§Specification for structural s teel standard quality fifth nsion

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IS : 432 P a r t I • 1982

TABLE 1 MECHANICAL PROPERTIES OF BARS Claus 8.1

SL No. y p AN D NOJ f1 AL SIZEOF BA R

U LT I K AT ET N S L

S T R E 8 8 ,

Min

Y I E L D STRES )

Min

E L O N G AT I O NP E R C E N T,

in

Jfild Steel Grad I

Fo r bars up to an d including 410 250 2320mm

Fo r bars over 20 mm, up to .10 2 4 23an d including 50 mm

2. il d Steel r de

Fo r bars up to an d including 370 225 2320mm

For bars over 20 mm, up to 370 215 25an d including 50 mm

3. M dium Tensile Steel

For bars up to an d including 540 350 2016mm

For bars over 16 mm, up to 540 340 20and including 32 mm

For bars over 32 mm, up to 510 330 20an d Including 50 mm

-Elongation on a gauge length 5·65 So where So is the cross-sectional area of theteat piece.

b if he so desires, from any bar or the coil, after it has been cut tothe required or specified length an d the test piece taken from anypart of it.

9.1.1.1 In neither case, the test piece shall be detached from the baror the coil, except in the presence of the purchaser or his authorizedrepresentative.

9.1.1.2 Before test pieces are selected, the manufacturer or suppliershall furnish the purchaser or his author ized representative with copiesof the mill records giving the number of bars in each cast with sizes aswell as the identification marks whereby the bars from their cast or eachcoil can be identified.

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IS : 432 ( Pa r t I ) • 1982

9.2 Tensile Tes t - The ultimate tensile stress, yield stress anti elongation of bars shall be determined in accordance with the requirements ofIS : 1608-1972* read in conjunction with IS : 226-1975t. h e testpieces shall be cut from the finished material and st ra ightened wherenecessary. They shall not be annealed or otherwise subjected to heattreatment. Any slight straightening which may be required shall be donecold.

9.2.1 In case of bars, the size of which is nbtuniform throughout thelength of test piece, limits shall be applied according to the actua l maxi-mum thickness of the piece selected for testing.

9.2.2 Should a tensile test piece break ontside the middle half of itsgauge length and the percentage elongation obtained is less than thatspecified, the test may be discarded at the manufacturer s option, andanother test mace from the same bar.

9.3B,end Tes t - The bend test-shall be performed in accordance withthe requirements of IS : 5 9 9 9 i 4 ~read in conjunction with 1S : 2261975t.

9.4 Retest - Should anyone of the 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, the material represented by the testsamples shall be deemed to comply with the requirements of that parti-cular test. Should the test piece from either of these additional samplesfail, the material represented by the test: samples shall be considered asnot having complied with this standard.

9.5 Sampling - Sampling for tensile and bend tests shall be in accord ..ance with IS : 226-1975t.

10. DEUVERY, INSPECTION AND TESTING FACILITIES

10.1 Unless otherwise specified,general requirements relat ing to thesupply of material, inspection and testing: shall conform to IS :.13871967§.

10.2 No. material shall be despatched from the manufacturer s orsuppliers premises prior to its being certified by the purchaser or hisauthorized representative as having fulfilled the tests and requirementslaid down in this standard except where the bundle or coil containingthe bars is marked with the lSI Certification Mark.

Method for tensile testing of steel products irst rezisiontSpecification for structural steel ( standard quality ) i th re;;isitmtMethod for bend test for steel products other than sheet strip, wire .. and tube

irst rezisiiJn ).§General requirements for t ~ p l yof metallurgical materials irst m£ n rl ).

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IS : 432 P a r t I ) - 1982

10.3 The- purchaser or his authorized representative shall be at libertyto inspect : and verify the steel maker s certificate of cast analysis at thepremises of the manufacturer or supplier; when the purchaser requiresan actual analysis of finished material this shall be made at a placeagreed to between the purchaser and the manufacturer or supplier.

10.4 Manufacturer s Cert if icate - In the case of bars which havenot been inspected at the manufacturer s works, the manufacturer orsupplier, as the case may be, shall supply the purchaser or his authorizedrepresentative with. the certificate stating the process of manufaCtureand also the test sheet signed by the manufacturer giving the result ofeach mechanical test applicable to the mater ia l purchased and thechemical composition, i f required. Each test sheet shall indicate thenumber or identification mark of the cast to which it applies, corres

ponding to the number or identification mark to be found on thematerial.

11. IDENTIFICATION AND MARKING

11.1 The manufacturer or suppl ier shall have ingots, billets and bars orbundles of bars marked in such a way that all finished bars can be tracedto the cast from which they were made. Every facility shall be given tothe purchaser or his authorized representative for tracing the bars to thecast from which they were made.

11.2 The medium tensile steel bars shall be suitably marked to identifythem from mild steel bars. Mild steel bars Grade I and II shall havedistinctive identification tags.

11.3 Each bundle or coil containing the bars may also be suitablymarked with the Standard Mark in which case the concerned test certi-ficate shall also bear the Standard Mark.

OT - The use of the Standard Mark is governed by the provisions of the

Bureau of Indian Standards Act, 1986and the Rules and Regulations made thereunder. The Standard Mark on products covered by an Indian Standard conveysthe assurance that they have been produced to comply with the requirements of thatstandard under a well defined system of inspection, testing and quality controlwhich is devised and supervised by BIS and operated by the producer .. Standardmarked products are also continuously checked by BIS for conformity to that standard as a further safeguard. Details of conditions under which a licence forthe use of the Standard Mark may be granted to manufacturers or producers maybe obtained from the Bureau of Indian Standards.


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is.432.1.1982 mild steel and medium tensile steel bars.pdf

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