IS 2090

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B U U R R E E A A UU O O FF I I N N D D I I A A NN S S T T A A N N D D A A R R D D SS

MANAK

MANAK BHAVANBHAVAN

,,

99 BAHADURBAHADUR SHAHSHAH ZAFARZAFAR MARGMARG NE

NEWW DELHIDELHI 110002110002

(Rea

(Reaffiffirmedrmed 2002000)0)

Edition 2.1 Edition 2.1 (1988-07) (1988-07)

Indian Standard

SPECIFICATION FOR

HIGH TENSILE STEEL BARS USED IN

PRESTRESSED CONCRETE

( First Revision )

(Incorporating Amendment No. 1) (Incorporating Amendment No. 1)

UDC

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BUREAU OF INDIAN STANDARDS BUREAU OF INDIAN STANDARDS This publication is protected under the

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

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

Indian Standard

SPECIFICATION FOR

HIGH TENSILE STEEL BARS USED IN

PRESTRESSED CONCRETE

( First Revision )

Joint Sectional Committee for Concrete Reinforcement, BSMDC 8 Joint Sectional Committee for Concrete Reinforcement, BSMDC 8

C

Chhaaiirrmmaann RReepprreesseennttiinng g S

SHRIHRI G. S. R G. S. R AO AO Central Public Works DepartmentCentral Public Works Department

Members Members S

SUPERINTENDINGUPERINTENDING E ENGINEERNGINEER

(CDO) (

(CDO) ( Alternate Alternate to to S

SHRIHRI G. S. R G. S. R AO AO))

D

DRR. J. L. A . J. L. A JMANIJMANI The Tata Iron & Steel Co Ltd, JamshedpurThe Tata Iron & Steel Co Ltd, Jamshedpur S

SHRIHRI A. N. M A. N. MITRA ITRA ( ( Alternate Alternate )) D

DRR A A NILNIL K K UMARUMAR Cement Research Institute of India, New DelhiCement Research Institute of India, New Delhi

S

SHRIHRI E. T. A E. T. A NTIA NTIA The Concrete Association of India, BombayThe Concrete Association of India, Bombay

S

SHRIHRI P. S P. SRINIVASANRINIVASAN ( ( Alternate Alternate )) S

SHRIHRI S. B S. B ANERJEE ANERJEE Steel Re-Rolling Mills Association of India, CalcuttaSteel Re-Rolling Mills Association of India, Calcutta

S

SHRIHRI S. N. C S. N. CHANDA HANDA Metallurgical and Engineering Consultants (India)Metallurgical and Engineering Consultants (India)

Ltd, Ranchi Ltd, Ranchi S

SHRIHRI R. D. C R. D. CHOUDHARY HOUDHARY ( ( Alternate Alternate ))

C

CHIEFHIEF E ENGINEERNGINEER((D D & & RR)) IIrrrriiggaattiioon n DDeeppaarrttmmeenntt, , GGoovveerrnnmmeennt t oof f PPuunnjjaabb,,

Chandigarh Chandigarh D

DIRECTORIRECTOR (C D) ( (C D) ( Alternate Alternate )) D

DEPUTY EPUTY D DIRECTORIRECTOR, S, STANDARDSTANDARDS

(B & S)-I (B & S)-I

Research, Designs & Standards Organization Research, Designs & Standards Organization

(Ministry of Railways), Lucknow (Ministry of Railways), Lucknow A

A SSISTANTSSISTANT D DIRECTORIRECTOR, S, STANDARDSTANDARDS

(B & S)-II (

(B & S)-II ( Alternate Alternate )) S

SHRIHRI D. I. D D. I. DESAIESAI Gammon India Ltd, BombayGammon India Ltd, Bombay

S

SHRIHRI A. L. B A. L. BHATIA HATIA ( ( Alternate Alternate )) S

SHRIHRI M. R. D M. R. DOCTOROCTOR Special Steels Ltd, BombaySpecial Steels Ltd, Bombay

S

SHRIHRI S. G. J S. G. JOSHIOSHI ( ( Alternate Alternate ))

S

SHRIHRI Z Z ACHARIA ACHARIA G GEORGEEORGE Structural Engineering Research Centre (CSIR),Structural Engineering Research Centre (CSIR), Madras

Madras S

SHRIHRI G. V. S G. V. SURYAKUMARURYAKUMAR ( ( Alternate Alternate )) S

SHRIHRI V. K. G V. K. GHANEKARHANEKAR Structural Engineering Research Centre (CSIR),Structural Engineering Research Centre (CSIR),

Roorkee Roorkee S

SHRIHRI D. S. P D. S. PRAKASHRAKASH R R AO AO ( ( Alternate Alternate ))

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(( Continued from pageContinued from page 1 1 )) M

Meemmbbeerrss RReepprreesseennttiinng g S

SHRIHRI V. G V. GULATIULATI Heatly & Gresham (India) Ltd, New DelhiHeatly & Gresham (India) Ltd, New Delhi

S

SHRIHRI P. K. G P. K. GUPTEUPTE National National Metallurgical Metallurgical Laboratory Laboratory (CSIR),(CSIR),

Jamshedpur Jamshedpur S

SHRIHRI N. C. J N. C. J AIN AIN Stup Consultants Ltd, BombayStup Consultants Ltd, Bombay

S

SHRIHRI M. C. T M. C. T ANDON ANDON ( ( Alternate Alternate )) S

SHRIHRI M. P. J M. P. J ASUJA ASUJA Research & Development Centre for Iron and SteelResearch & Development Centre for Iron and Steel

(SAIL), Ranchi (SAIL), Ranchi S

SHRIHRI A. J A. J AYAGOPAL AYAGOPAL Engineer-in-Chief’s Branch, Army HeadquartersEngineer-in-Chief’s Branch, Army Headquarters

M

M AJ AJ R. C R. CHANDRASEKHARANHANDRASEKHARAN ( Alternate ( Alternate ))

S

SHRIHRI S. Y. K S. Y. K HANHAN Killick Nixon Ltd, BombayKillick Nixon Ltd, Bombay S

SHRIHRI P. S. V P. S. VENKATENKAT ( ( Alternate Alternate )) S

SHRIHRI M. N. K M. N. K HANNA HANNA Bhilai Steel Plant (SAIL), BhilaiBhilai Steel Plant (SAIL), Bhilai

S

SHRIHRI C. D C. D ASGUPTA ASGUPTA ( ( Alternate Alternate ))

S

SHRIHRI H. N. K H. N. K RISHNA RISHNA M MURTHY URTHY Tor Steel Research Foundation in India, CalcuttaTor Steel Research Foundation in India, Calcutta

D

DRR C. S. V C. S. VISWANATHA ISWANATHA ( ( Alternate Alternate ))

S

SHRIHRI S. N. M S. N. M ANOHAR ANOHAR Tata Consulting Engineers, BombayTata Consulting Engineers, Bombay

S

SHRIHRI N. N N. N AGARAJ AGARAJ ( ( Alternate Alternate )) S

SHRIHRI R. K. M R. K. M ATHUR ATHUR Public Works Department, LucknowPublic Works Department, Lucknow

S

SHRIHRI S. N. P S. N. P AL AL M. N. Dastur & Co (P) Ltd, CalcuttaM. N. Dastur & Co (P) Ltd, Calcutta

S

SHRIHRI S S ALIL ALIL R ROY OY ( ( Alternate Alternate ))

S

SHRIHRI B. K. P B. K. P ANTHAKY ANTHAKY Hindustan Construction Co Ltd, BombayHindustan Construction Co Ltd, Bombay

S

SHRIHRI P. V. N P. V. N AIK AIK ( ( Alternate Alternate ))

S

SHRIHRI T. S T. SENEN IRC Steels Ltd, CalcuttaIRC Steels Ltd, Calcutta

S

SHRIHRI M. V. S M. V. SHASTRY HASTRY Roads Wing (Ministry of Shipping and Transport)Roads Wing (Ministry of Shipping and Transport)

S

SHRIHRI S SHIRISHHIRISH H. S H. SHAHHAH Tensile Steel Ltd, BombayTensile Steel Ltd, Bombay

S

SHRIHRI M. S. P M. S. P ATHAK ATHAK ( ( Alternate Alternate ))

S

SHRIHRI C. N. S C. N. SRINIVASANRINIVASAN C. R. Narayana Rao, MadrasC. R. Narayana Rao, Madras

S

SHRIHRI C. N. R C. N. R AGHAVENDRAN AGHAVENDRAN ( Alternate ( Alternate )) S

SHRIHRI K. S. S K. S. SRINIVASANRINIVASAN National Buildings Organization, New DelhiNational Buildings Organization, New Delhi

S

SHRIHRI A. K. L A. K. L AL AL ( ( Alternate Alternate ))

S

SHRIHRI G. R G. R AMAN AMAN,,

Director (Civ Engg) Director (Civ Engg)

Director General, BIS (

Director General, BIS ( Ex-officio MemberEx-officio Member )) Secretary

Secretary S

SHRIHRI M. N. N M. N. NEELAKANDHANEELAKANDHAN

Assistant D

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3 3

Indian Standard

SPECIFICATION FOR

HIGH TENSILE STEEL BARS USED IN

PRESTRESSED CONCRETE

( First Revision )

0. 0. F O R E W O R DF O R E W O R D 0.1

0.1 This Indian Standard (First Revision) was adopted by the IndianThis Indian Standard (First Revision) was adopted by the Indian Standards Institution on 14 March 1983, after the draft finalized by Standards Institution on 14 March 1983, after the draft finalized by the Joint Sectional Committee for Concrete Reinforcement had been the Joint Sectional Committee for Concrete Reinforcement had been approved by the Civil Engineering Division Council.

approved by the Civil Engineering Division Council. 0.2

0.2 This standard was first published in 1962 to cover theThis standard was first published in 1962 to cover the requirements of high tensile steel bars used in prestressed concrete. requirements of high tensile steel bars used in prestressed concrete. The present revision has been taken up with a view to incorporating The present revision has been taken up with a view to incorporating modifications found necessary as a result of experience gained in

modifications found necessary as a result of experience gained in usingusing this standard both by

this standard both by manufacturermanufacturers and users.s and users. 0.3

0.3 In this revision, modifications have been incorporated in In this revision, modifications have been incorporated in provisionsprovisions relating to tolerances, proof stress and relaxation test. The relating to tolerances, proof stress and relaxation test. The requirement of young’s modulus has been deleted. Further S.I. units requirement of young’s modulus has been deleted. Further S.I. units have been adopted for specifying the various physical requirements in have been adopted for specifying the various physical requirements in the standard and references to various other Indian Standards the standard and references to various other Indian Standards appearing in this standard have been updated.

appearing in this standard have been updated. 0.4

0.4 In the formulation of this standard, due weightage has been givenIn the formulation of this standard, due weightage has been given to international co-ordination among the standard and practices to international co-ordination among the standard and practices prevailing in different countries in addition to relating it to the prevailing in different countries in addition to relating it to the practices in the field in this country.

practices in the field in this country. 0.5

0.5 This edition 2.1 incorporates Amendment No. 1 (July 1988). SideThis edition 2.1 incorporates Amendment No. 1 (July 1988). Side bar indicates modification of the text as the result of incorporation of bar indicates modification of the text as the result of incorporation of the amendment.

the amendment. 0.6

0.6 For the purpose of deciding whether a particular requirement of For the purpose of deciding whether a particular requirement of this standard is complied with, the final value, observed or calculated, this standard is complied with, the final value, observed or calculated, expressing the result of a test or analysis, shall be rounded off in expressing the result of a test or analysis, shall be rounded off in acco

accordanrdance with ISce with IS :: 2-1962-1960*. The n0*. The number oumber of signif significanficant plact placeses retained in the rounded off value should be the same as that of the retained in the rounded off value should be the same as that of the specified value in this standard.

specified value in this standard.

*Rules for rounding off numerical values (

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1. SCOPE 1. SCOPE 1.1

1.1 This standard covers the requirements for high tensile steel barsThis standard covers the requirements for high tensile steel bars used in prestressed concrete.

used in prestressed concrete. 2. TERMINOLOGY

2. TERMINOLOGY 2.0

2.0 For the purpose of this standard, the following definitions shallFor the purpose of this standard, the following definitions shall apply.

apply. 2.1 Bar

2.1 Bar — A rolled rod or — A rolled rod or bar of steel of circular cross-section.bar of steel of circular cross-section. 2.2

2.2 EloElongangatiotionn — The increase in length of a tensile test specimen — The increase in length of a tensile test specimen under stress. The elongation at fracture

under stress. The elongation at fracture is conventionally expressed asis conventionally expressed as a percentage of the original gauge length of the standard test specimen. a percentage of the original gauge length of the standard test specimen. 2.3

2.3 High High TensiTensile le SteelSteel — Alloy steel having a tensile strength of not — Alloy steel having a tensile strength of not les

less thas than 98n 9800 N/mN/mmm22.. 2.4 Nominal Size

2.4 Nominal Size — The dimension — The dimension of the diameter of of the diameter of the bar.the bar. 2.5

2.5 ProProof Sof Stretressss — The stress which — The stress which produces a residual strain of 0.2produces a residual strain of 0.2 percent of the original gauge length

percent of the original gauge length (non-proportiona(non-proportional elongation).l elongation). 2.6

2.6 TensTensile ile StrenStrengthgth — The maximum load reached in a tensile test — The maximum load reached in a tensile test divided by the original cross-sectional area of the gauge length portion divided by the original cross-sectional area of the gauge length portion of the test specimen.

of the test specimen.

3. MANUFACTURE AND CHEMICAL COMPOSITION 3. MANUFACTURE AND CHEMICAL COMPOSITION 3.1

3.1 The steel shall be manufactured by the open-hearth, electric,The steel shall be manufactured by the open-hearth, electric, duplex, acid bessember, basic oxygen (LD) process or a combination of duplex, acid bessember, basic oxygen (LD) process or a combination of these processes with the addition of necessary alloying elements. In these processes with the addition of necessary alloying elements. In case any other process is

case any other process is employed in the manufacture, prior approvalemployed in the manufacture, prior approval of the purchaser shall be obtained. The steel shall be hot rolled into of the purchaser shall be obtained. The steel shall be hot rolled into bars and subsequently processed to give the required physical bars and subsequently processed to give the required physical properties. Where the bars are threaded the thread shall be either cut properties. Where the bars are threaded the thread shall be either cut or rolled. Threaded ends shall be protected from corrosion and damage. or rolled. Threaded ends shall be protected from corrosion and damage. 3.1.1

3.1.1 The ladle analysis of steel when made in accordance with theThe ladle analysis of steel when made in accordance with the rele

relevant parvant parts of ISts of IS :: 228* sha228* shall show tll show that stehat steel contel contains noains not more tht more thanan 0.050 percent of sulphur and not more than 0.050 percent of 0.050 percent of sulphur and not more than 0.050 percent of phosphorus.

phosphorus. 3.2

3.2 All All finished finished bars bars shall shall be be cleanly cleanly rolled rolled to to specified specified dimensions.dimensions. They shall be sound

They shall be sound and free from splits, harmful surface flaws, rough,and free from splits, harmful surface flaws, rough, jagged

jagged and and imperfect imperfect edges; aedges; and othnd other defecter defects. Unless s. Unless otherwise otherwise agreedagreed between the purchaser and the manufacturer or supplier the

between the purchaser and the manufacturer or supplier the bars shallbars shall not carry on its surface lubricants, rust or other matter to a degree not carry on its surface lubricants, rust or other matter to a degree likely to impair its

likely to impair its adhesion to concrete.adhesion to concrete.

*Methods for chemical analysis of steels (

(6)

5 5 4. NOMINAL SIZES

4. NOMINAL SIZES 4.1

4.1 Bars shall be manufactured in the following nominal sizes: Bars shall be manufactured in the following nominal sizes: 10, 12, 1

10, 12, 16, 20, 26, 20, 22, 25, 22, 25, 28 and 328 and 32 mm.mm. 5. TOLERANCES

5. TOLERANCES 5.1

5.1 NomNominainal Sil Sizeze — The tolerance on the nominal size shall be — The tolerance on the nominal size shall be ±

± 0.0.55 mm mm fofor br barars us up tp to ano and id incncluludiding ng 2525 mm amm and nd ±± 0.0.66 mm fmm for or babarsrs ab

abovove 2e 255 mmmm.. 5

5.2.2 MMaassss — The — The tolerance on ttolerance on the mass of he mass of the finished the finished bar shall be bar shall be ±± 55 perc

percent foent for bars of dr bars of diametiameter up to er up to and inand includicluding 16ng 16 mm and mm and ±± 33 perc

percent foent for bars ar bars above bove 1616 mm.mm.

N

NOTEOTE — When bars are ordered by mass, the mass of the bars shall be calculated on — When bars are ordered by mass, the mass of the bars shall be calculated on

the basis that hig

the basis that high tensile steel wh tensile steel weighs 0.785eighs 0.785 kg/cmkg/cm22 of cross-sectional area per metre of cross-sectional area per metre run.

run.

5.3

5.3 When necessary, other tolerances may be agreed between theWhen necessary, other tolerances may be agreed between the purchaser and the manufacturer.

purchaser and the manufacturer. 6. PHYSICAL REQUIREMENTS 6. PHYSICAL REQUIREMENTS 6.1

6.1 The tensile strength, proof stress and alongation, when determinedThe tensile strength, proof stress and alongation, when determined in accordance with

in accordance with 7.2.27.2.2 shall be as given in shall be as given in Table 1.Table 1.

6.2

6.2 RelRelaxaxatiationon — The relaxation of stress in the bar, when tested in — The relaxation of stress in the bar, when tested in accordance with

accordance with 7.37.3, sha, shall noll not excet exceed 49ed 49 N/mmN/mm22 at t at the ehe end ond of 1f 1 000000 hours. Alternatively, the manufacturer shall provide proof that the hours. Alternatively, the manufacturer shall provide proof that the quality of bar supplied is such as to comply with this test requirement. quality of bar supplied is such as to comply with this test requirement. 7. TESTS

7. TESTS

7.1 Selection of Test Specimens 7.1 Selection of Test Specimens 7.1.1

7.1.1 All All test test specimens specimens shall shall be be of of sufficient sufficient length length for for the the specifiedspecified tests and may be cut either from the ends of the bars before cutting to tests and may be cut either from the ends of the bars before cutting to

TAB

TABLE LE 11 MEMECHCHANIANICACAL PL PROPROPERERTIETIES OS OF BAF BARSRS (( ClauseClause 8 8..11 ))

C

CHARACTERISTICHARACTERISTIC RREQUIREMENTEQUIREMENT

Tensile strength,

Tensile strength, MinMin 989800 N/N/mmmm22 P

Prroooof f ssttrreessss NNoot t lleesss s tthhaan n 880 0 ppeerrcceennt t oof f tthhee minimum specified tensile minimum specified tensile strength

strength Elongation at rupture on a gauge

Elongation at rupture on a gauge length 5.65

length 5.65 √√ A, A, MinMin (where A is (where A is the area of cross-section)

the area of cross-section)

10 percent 10 percent

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finished lengths or from any part of the bar in the presence of the finished lengths or from any part of the bar in the presence of the purchaser or his

purchaser or his authorized representative.authorized representative. 7.1.2

7.1.2 Before the specimens are selected, the manufacturer or supplierBefore the specimens are selected, the manufacturer or supplier shall furnish the purchaser or his authorized representative with shall furnish the purchaser or his authorized representative with copies of mill records giving the number of bars in each cast with sizes, copies of mill records giving the number of bars in each cast with sizes, marks, etc, whereby the bars can be identified.

marks, etc, whereby the bars can be identified. 7.2 Tensile Test

7.2 Tensile Test 7.2.1

7.2.1 The test specimens shall not be annealed or otherwise subjectedThe test specimens shall not be annealed or otherwise subjected to heat treatment unless the bars from which they are cut are to heat treatment unless the bars from which they are cut are similarly treated in which case the specimen shall be similarly and similarly treated in which case the specimen shall be similarly and simultaneously treated with the bars before testing.

simultaneously treated with the bars before testing. 7.2.2

7.2.2 The tensile strength, proof stress and elongation shall beThe tensile strength, proof stress and elongation shall be determined in accordance with the methods specified in determined in accordance with the methods specified in IS

IS :: 16160808-1-197972*2*..

N

NOTEOTE — In cases where the manufacturing process includes cold working, test to — In cases where the manufacturing process includes cold working, test to

determine compliance with proof stress requirements need not be made within 48 determine compliance with proof stress requirements need not be made within 48 hours of such cold working.

hours of such cold working.

7.3

7.3 ConsConstant Strtant Strain Relaxain Relaxation Tesation Testt — If required by the — If required by the purchaser, the manufacturer shall provide evidence from records of purchaser, the manufacturer shall provide evidence from records of tests of similar bars that the relaxation of stress from an initial stress tests of similar bars that the relaxation of stress from an initial stress of 70 percent of the specified minimum tensile strength conforms to of 70 percent of the specified minimum tensile strength conforms to that specified in

that specified in 6.26.2. During the whole period of test the temperature. During the whole period of test the temperature shal

shall be mainl be maintainetained at 20d at 20 ±± 2°C. Th2°C. The initie initial load sal load shall be aphall be applied iplied in an a period of not more than 5 minutes and shall then be held constant for a period of not more than 5 minutes and shall then be held constant for a further period of one minute. Thereafter no adjustment of

further period of one minute. Thereafter no adjustment of load shall beload shall be made, and the load relaxation readings shall commence from the end made, and the load relaxation readings shall commence from the end of sixth minute. On no account shall the test piece be overstressed. The of sixth minute. On no account shall the test piece be overstressed. The number of specimens tested shall be as agreed between the purchaser number of specimens tested shall be as agreed between the purchaser and the manufacturer.

and the manufacturer.

8. SAMPLING AND CRITERIA FOR CONFORMITY 8. SAMPLING AND CRITERIA FOR CONFORMITY 8.1 Scale of Sampling

8.1 Scale of Sampling 8.1.1

8.1.1 LotLot — In any consignment, all the high tensile steel bars of the — In any consignment, all the high tensile steel bars of the same size and manufactured from the same cast shall be grouped same size and manufactured from the same cast shall be grouped together to constitute a lot.

together to constitute a lot. 8.1.2

8.1.2 The number of bars to be selected at random from the lot shallThe number of bars to be selected at random from the lot shall depend upon the size of the lot and shall be in accordance with col 1 depend upon the size of the lot and shall be in accordance with col 1 and col 2 of Table 2.

and col 2 of Table 2.

*Method for tensile testing of steel products (

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7 7 8.2 Number of Tests

8.2 Number of Tests 8.2.1

8.2.1 All All the the bars bars selected selected as as inin 8.1.28.1.2 shall be examined for freedom shall be examined for freedom from defects (

from defects ( seesee 3.23.2 ) and tolerance on nominal size and mass () and tolerance on nominal size and mass ( seesee 55 ).). 8.2.2

8.2.2 Requisite material from any one of the bars in the lot shall beRequisite material from any one of the bars in the lot shall be subjected to chemical analysis (

subjected to chemical analysis ( seesee 3.1.13.1.1 ).). 8.2.3

8.2.3 The number of bars to be subjected to the tensile test (The number of bars to be subjected to the tensile test ( seesee 7.27.2 )) shall be equal to the size of

shall be equal to the size of the sub-sample as given in col 3 of the sub-sample as given in col 3 of Table 2.Table 2. 8.3 Criteria for Conformity

8.3 Criteria for Conformity 8.3.1

8.3.1 The lot shall be considered as conforming to the requirements of The lot shall be considered as conforming to the requirements of this specification if the conditions mentioned in

this specification if the conditions mentioned in 8.3.28.3.2 toto 8.3.58.3.5 areare satisfied.

satisfied. 8.3.2

8.3.2 The number of bars failing to satisfy one or more of theThe number of bars failing to satisfy one or more of the requirements specified in

requirements specified in 44 and and 66 shall not exceed the corresponding shall not exceed the corresponding permissible number given below:

permissible number given below:

8.3.3

8.3.3 The results of chemical analysis for phosphorus and sulphurThe results of chemical analysis for phosphorus and sulphur content on the sample tested shall satisfy the requirements given content on the sample tested shall satisfy the requirements given

TA

TABLE BLE 22 SIZSIZE OF TE OF THE SHE SAMPAMPLE LE AND AND SUBSUB-SA-SAMPMPLELE (( ClausesClauses 8.1 8.1.2 an.2 and 8.2d 8.2.3.3 ))

L

LOTOT S SIZEIZE SSIZEIZE OFOF S S AMPLE AMPLE SSIZEIZE OFOF S SUBUB--SAMPLESAMPLE

((11)) ((22)) ((33)) U Upp ttoo 5500 55 22 5 511 ttoo 110000 1100 22 1 10011 ttoo 220000 1155 22 2 20011 ttoo 330000 2200 33 3 30011 ttoo 550000 3300 33 5 50011 aanndd aabboovvee 4400 55 S

Siizze e oof f SSaammppllee PPeerrmmiissssiibblle e NNuummbbeerr 5 5 00 10 10 11 15 15 11 20 20 22 30 30 33 40 40 33

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under

under 3.1.13.1.1. If the test results for any of the characteristics fail to. If the test results for any of the characteristics fail to satisfy the corresponding requirements, two more tests for that satisfy the corresponding requirements, two more tests for that character

characteristic shall be done and istic shall be done and both these test results shall satisfy both these test results shall satisfy thethe requirements for that characteristic.

requirements for that characteristic. 8.3.4

8.3.4 For physical requirements except proof stress, the mean and theFor physical requirements except proof stress, the mean and the range of the test results obtained for the various characteristic shall range of the test results obtained for the various characteristic shall satisfy the appropriate condition(s) given below:

satisfy the appropriate condition(s) given below: a)

a) (Mean + 0.6 R(Mean + 0.6 Range) shall ange) shall be less than be less than or equal to or equal to the maximumthe maximum specification limit.

specification limit. b)

b) (Me(Meanan –– 0.6 0.6 RanRange) sge) shalhall be gl be greareater tter than ohan or equr equal to tal to thehe minimum specification limit.

minimum specification limit. 8.3.5

8.3.5 For proof stress, all the test specimens shall satisfy theFor proof stress, all the test specimens shall satisfy the requirements of the

requirements of the characteristic.characteristic.

9. DELIVERY, INSPECTION AND TESTING FACILITIES 9. DELIVERY, INSPECTION AND TESTING FACILITIES 9.1

9.1 Unless otherwise specified, general requirements relating to theUnless otherwise specified, general requirements relating to the supp

supply of materly of material, insial, inspectpection and testion and testing shaling shall conforl conform to ISm to IS :: 1387- 1387-1967*.

1967*. 9.2

9.2 No material shall be despatched from the manufacturers’ orNo material shall be despatched from the manufacturers’ or suppliers’ premises prior to its being certified by the purchaser or his suppliers’ premises prior to its being certified by the purchaser or his authorized representative as having fulfilled the tests and authorized representative as having fulfilled the tests and requirements laid down in this standard except where the bundle or requirements laid down in this standard except where the bundle or coil containing the wire is

coil containing the wire is marked with the ISI marked with the ISI Certification Mark.Certification Mark. 9.3

9.3 The purchaser or his authorized representative shall be at libertyThe purchaser or his authorized representative shall be at liberty to inspect and verify the steel maker’s certificate of cast

to inspect and verify the steel maker’s certificate of cast analysis at theanalysis at the premises of the manufacturer or supplier; when the purchaser required premises of the manufacturer or supplier; when the purchaser required an actual analysis of finished material, this shall be made at a place an actual analysis of finished material, this shall be made at a place agreed to between the purchaser and the

agreed to between the purchaser and the manufacturer or supplier.manufacturer or supplier. 9.4

9.4 ManuManufactfacturer Certurer Certificaificatete — In the case of bars which have not — In the case of bars which have not been inspected at the manufacturer’s works, the manufacturer or been inspected at the manufacturer’s works, the manufacturer or supplier, as the case may be, shall supply the purchaser or his supplier, as the case may be, shall supply the purchaser or his authorized representative with the certificate stating the process of authorized representative with the certificate stating the process of manufacture and test sheets signed by the manufacturer giving the manufacture and test sheets signed by the manufacturer giving the result of each mechanical test applicable to the material, and the result of each mechanical test applicable to the material, and the chemical composition if required. Each test sheet shall indicate the chemical composition if required. Each test sheet shall indicate the number or identification mark to be found on the material.

number or identification mark to be found on the material. 9.5

9.5 When test for relaxation is required to be carried out, the cost of When test for relaxation is required to be carried out, the cost of testing shall be borne by

testing shall be borne by the purchaser.the purchaser.

*General requirements for the supply of metallurgical materials (

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9 9 10. IDENTIFICATION AND

10. IDENTIFICATION AND MARKINGMARKING 10.1

10.1 The bar manufacturer shall attach to every bundle a suitableThe bar manufacturer shall attach to every bundle a suitable metal tag which shall bear the manufacturer’s name, the size of the metal tag which shall bear the manufacturer’s name, the size of the bar, the heat number of the cast from which the bars have been rolled bar, the heat number of the cast from which the bars have been rolled and the designation of the standard. All bars or bundles of bars shall and the designation of the standard. All bars or bundles of bars shall be marked in such a way that it is possible to trace all finished bars to be marked in such a way that it is possible to trace all finished bars to the cast from which they were made.

the cast from which they were made. 10.1.1

10.1.1 Each bar or the metal tag attached to every bundle of bars mayEach bar or the metal tag attached to every bundle of bars may also be marked with

also be marked with the Standard Mark.the Standard Mark.

N

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

(11)

harmonious development of the activities of standardization, marking and quality certification of harmonious development of the activities of standardization, marking and quality certification of goods and attending to connected matters in the country.

goods and attending to connected matters in the country. Copyright

Copyright

BIS has the copyright of all its publications. No part of these publications may be reproduced in any BIS has the copyright of all its publications. No part of these publications may be reproduced in any form without the prior permission in writing of BIS. This does not

form without the prior permission in writing of BIS. This does not preclude the free use, in the coursepreclude the free use, in the course

of implementing the standard, of necessary details, such as symbols and sizes, type or grade of implementing the standard, of necessary details, such as symbols and sizes, type or grade designations. Enquiries relating to copyright be addressed to t

designations. Enquiries relating to copyright be addressed to t he Director (Publications), BIS.he Director (Publications), BIS.

Review of Indian Standards Review of Indian Standards Amendments are

Amendments are issued to standarissued to standards as the needs as the need arises on d arises on the basis of the basis of comments. Standarcomments. Standards are alsods are also reviewed periodically; a standard along with amendments is reaffirmed when such review indicates reviewed periodically; a standard along with amendments is reaffirmed when such review indicates that no changes are needed; if the review indicates that changes are needed, it is taken up for that no changes are needed; if the review indicates that changes are needed, it is taken up for revision. Users of Indian Standards should ascertain that they are in possession of the latest revision. Users of Indian Standards should ascertain that they are in possession of the latest amendments or

amendments or edition by reedition by referring to ferring to the latest issuthe latest issue of ‘BIS e of ‘BIS Catalogue’ and Catalogue’ and ‘Standards‘Standards :: MonthlyMonthly Additions’.

Additions’. This Indian

This Indian Standard has Standard has been devebeen developed by loped by Technical CTechnical Committeeommittee :: BSMDC 8BSMDC 8

Amendments Issued Since

Amendments Issued Since PublicationPublication

Amend No.

Amend No. Date of IssueDate of Issue

Amd. No. 1

Amd. No. 1 July 1988July 1988

BU

BUREREAUAU OFOF ININDIDIANAN SSTATANDNDAARDRDSS Headquarters:

Headquarters:

Manak Bhavan, 9 Bahadur Shah Zafar Marg, New Delhi 110002. Manak Bhavan, 9 Bahadur Shah Zafar Marg, New Delhi 110002. Telephones:

Telephones: 323 01 31, 323 01 31, 323 33 75, 323 33 75, 323 94 02323 94 02

Teleg

Telegrams:rams: ManakManaksansthsansthaa (Common to all offices) (Common to all offices) R

ReeggiioonnaallOOffffiicceess:: TTeelleepphhoonnee

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600 2200 2255 S

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