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है”ह”ह

IS 7557 (1982): Specification for Steel wire : uartto 20 mmfor the manufacture of cold forged rivets [MTD 4: Wrought StSteel Products]

IS:7557 - 1982

Indian Standard

SPECIFICATION FOR STEEL WIRE ( UP TO 20 mm ) FOR

THE MANUFACTURE OF COLD-FORGED RIVETS

( First Revision )

Wrought Steel Products Sectional Committee, SMDC 5

Chariman

Dn U. N. BI~RANY

Members

SHRI S. BANERJER

SHRI S. K. BASU SHRI G. K. JHA ( Alternate )

SHRI A. P. BHATNACA~L

SHRI J. BANERJ~E ( Alternale ) SHRI Y. P. S.BISHNOI SHRI A. M. BISWAS

SHRI K. L. BARUI ( Alternate ) DEPUTY DIRECTOR ( MET ) SHRI S. C. DEY SHRI B. K. DUTTA

SHRI P. R. DAS ( Alternate ) SHRI C. R. GHOSH Mukand Iron & Steel Works Ltd, Bombay

SHRI H. P. PRIOLKA~~ ( Alternate J SHRI A. K. JEE Ministry of Defence ( DGI )

SHRI V. I. RAMASWAMY ( Alternate ) SHRI SUDHAXAR JHA Steel Authority of India Ltd ( R & D Centre for

Iron & Steel, Ranchi ) JOINT DIRECTOR STDS (W)/I&L Ministry of Railways

.JOINY DIRECTOR ( IRON & STEEL ) ( Alter&e )

SHRI ONKA~~ S. KANW.~R Association of Indian Engineering Industry ( Steel Tubes Division ), New Delhi

SHRI v. B. KHANNA Directorate General of Supplies & Disposals ( Inspection Wing ), New Delhi

SHRI D. K. PAUL ( Alternate )

Representing

Modella Steel & Alloys Ltd, Bombay

Steel Re-Rolling Mills Association of India, Calcutta

M. N. Dastur & Co Pvt Ltd, Calcutta

Steel Authority of India Ltd (Durgapur Steel Plant )

Steel Authority of India Ltd ( Bokaro Steel Plant ) National Test House, Calcutta

Ministry of Railways Central Boilers Board, New Delhi Iron & Steel Control, Calcutta

( Contznued on page 2 )

@ Copyrighf 1983 INDIAN STANDARDS INSTITUTION

This publication is protected under the Indian Copyright Act ( XIV of 1957 ) and 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.

IS:7557 - 1982

( Continuedfrom Page 1 )

Members Repescnnng DR K. V. KRISHNA~IURTHY Bharat Heavy Electricals Ltd

SHRI A. K. MITTAL ( Alternate I ) SHRI U. MOHAN RAO ( Alternate II )

SHRI C. K. KURIAKOSE Hindustan Shipyard Ltd, Vishakhapatnam SHRI N. S. R. V. RAJU ( Alternate )

DR T. MUEHERJEE SHRI A. N. MITRA ( Alternate )

Tata Iron & Steel Co Ltd, Jamshedpur

SHRI SATISH MURANJAN Special Steels Ltd, Bombay SHRI M. R. DOCTOR ( Alternute )

SHRI K. R. NARASIMRAN Metal Box India Ltd, Calcutta SHRI A. G. SHRIMANKAR ( Alternate )

SHR1K.V. PA1 Steel Authority of India Ltd ( Indian Iron & Steel Co Burnpur )

SHRI T. K. DATTA ( Alternate ) PROP S. S. PANI Steel Authority of India Ltd ( Rourkela Steel Plant )

SHRI S. G. TUDEKAR ( Alternate ) SHRI RAOHIJBIE SIN~H National Metallurgical

Jamshedpur Laboratory ( CSIR),

SHRI SISIR SEN Steel Authority of India Ltd ( Bhilai Steel Plant ) SHRI D. SRINIVASAN Joint Plant Committee, Calcutta

SRRI B. P. GHOSH ( Alternate ) SHRI Y. P. SYNCAL Federation of Engineering Industries of India, New

Delhi SHRI H. L. BHARDWAJ ( Alternate )

SHRI C. R. RAMA RAO, Director General, IS1 ( Ex-o&o Member ) Director ( Strut &Met )

Secretary

SHRI V. K. JAIN Deputy Director ( Metals ), ISI

Panel for Rivet Bars, SMDC 5 : P37

Conuener

SHRI P. K. MUNSRT Ministry of Railways

Members

&RI R. BHATTACH~RYA Guest, Keen, Williams Ltd, Howrah SHRI I. CHAKRAV.<R~Y ( Alternate )

SHRI M. N. KHANNA SHRI U. C. SHARMA ( Alternate )

Steel Authority of India Ltd ( Bhilai SterI Plant)

SHRI A. N. MITRA Tata Iron & Steel Co Ltd, Jamshedpur SRRI S .C. MOHANTY ( Alternate)

SHRI SATISH MURAN~AN Special Steels Ltd, Bombay SHRI K. M. TANESA Dire;ctz.--; General of Supplies & Disposals, New

2

IS:7557-1982

Indian Standard

SPECIFICATION FOR STEEL WIRE ( UP TO 20 mm ) FOR

THE MANUFACTURE OF COLD-FORGED RIVETS

( First Revision )

0. FOREWORD

0.1 This Indian Standard ( First Revision ) was adopted by the Indian Standards Institution on25 November 1982, after the draft finalized by the Wrought Steel Products Sectional Committee had been approved by the Structural and Metals Division Council.

0.2 This standard was first published in 1974. In the light of experience gained during subsequent years, the Committee decided to revise this standard making the following main modifications:

4

b)

4 d)

Strengths have been specified in terms of MPa, in alignment with adoption of SI units both nationally and internationally.

Strength requirements have been specified for wires in annealed as well as drawn condition.

Requirements for shear strength have been specified.

Retest clause has been deleted as it is duly covered in IS : 8910- 1978*.

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 accord- ance with IS : 2-1960t. The number of significant places retained in the 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 steel wire up to 20 mm diameter for the manufacture of cold-forged rivets for structural purposes.

‘General technical delivery requirements for steel and steel products. +Rules for rounding off numerical values ( rev&-d ).

3

IS : 7557 - 1982

2. SUPPLY OF MATERIAL

2.1 General requirements relating to the supply of steel wires shall conform to IS : 8910-1978*.

2.2 Unless otherwise agreed to between the purchaser and the manu- facturer, the steel wire shall be supplied in coils weighing not more than 600 kg each.

3. MANUFACTURE

3~1 Wire shall be made from steel manufactured by open-hearth, electric, duplex, basic oxygen or a combination of these processes. In case any other process is employed by the manufacturer, prior approval of the purchaser should be obtained.

3.1.1 Steel shall be supplied semi-killed or killed. Rimming steel may also be permitted subject to agreement between the purchaser and the manufacturer.

4. CHEMICAL COMPOSITION

4.1 Ladle Analysis - Ladle analysis of the steel, when carried out either by the method specified in the relevant parts of IS : 228t or any

other established instrumental/chemical method shall be as given below. In case of dispute the procedure given in ,relevant parts of IS : 2287 shall be the referee method:

Constituent Percent, Max

Carbon 0.23

Sulphur 0.050

Phosphorus 0.050

NOTE - If required, lower limit of carbon may be specifed as mutually agreed to between the purchaser and the manufacturer.

4.2 Product Analysis - Permissible variation, in case of product analysis, over the limits specifiedunder 4.1, shall be as follows:

Constituent Variation Ouer the Specified Maximum Limit, Percent

Carbon 0.02

Sulphur 0*005

Phosphorus 0’005

*General technical delivery requirements for steel and steel products. ’ tMethods for chemical analysis of steels ( ~SSUC~ in several parts ),

4

IS : 7557 - 1982

4.3 When steel is required in copper bearing quality, copp-er content shall be between 0.20 to 0.35 percent. In case of product analysis, the permissible variation shall not exceed f 0.03 percent.

4.4 When the steel is silicon-killed, silicon content in the product analysis shall not be less than 0.10 percent. When the steel is silicon-aluminium killed or aluminium-killed, the requirement regarding minimum silicon content shall not apply.

5. FREEDOM FROM DEFECTS

5.1 Steel wire shall be well and cleanly drawn to the dimensions and tolerances specified, The finished material shall be free from such surface and internal flaws, as would be detrimental to the end use of the material.

6. DIMENSIONAL TOLERANCES

6.1 The wires shall comply with the following dimensional tolerances:

Diameter of Wire Tolerance

mm mm

Upto 0.05

Over 2 up to 3 0.06

Over 3 up to 6 0.075

Over 6 up to 10 0.09

Over 10 up to 20 0.12

6.1.1 All the tolerances specified shall be minus tolerances. When special plus and minus tolerances are required by the purchaser the sum of such tolerances shall not be specified as less than the above total tolerances.

7. HEAT TREATMENT

7.1 The steel wire shall be supplied in annealed and/or as-drawn condition.

8. SELECTION OF TEST SAMPLES

8.1 Test samples shall be selected by the purchaser from the coils, supplied in the annealed and/or as-drawn condition.

8.2 Test samples shall not be cut from the coils except in the presence, or with the approval, of the purchaser. .

5

IS:7557 -1982

samples are selected, full particulars regarding the mass or number of coils in each cast shall be furnished

by the manufacturer to the purchaser.

8.3 Before the test cast number, size,

9. TENSILE TEST

9.1 One tensile test shall be made from the finished steel wire for every 10 tonnes of a cast or part thereof. When more than one diameter of wire is specified, one additional test shall be made for each variation in diameter.

9.1.1 No tensile test shall be carried out for wire below 6 mm diameter.

9.2 The tensile properties of steel wire when determined in accordance with IS : 1608-1972* or IS : 1521-19727 shall be as given below:

Characteristic Requirement ~-_------A-_--_-_-~

Annealed Condition As-Drawn Condition

(1) (2) (3)

Tensile strength, MPa 330-410 410-490

Yield stress, Min, MPa 160 190

Elongation, Min, percent 30 20 ( on gauge length 5.65 1/K)

NOTE - 1 MPa = 1 N/mm2 = 1 MN/m2 = 0102 0 kgf/mm2.

9.3 Tensile properties other than those specified at 9.2 may be mutually agreed to between the purchaser and the supplier.

10. SHE-AR STRENGTH

10.1 One shear strength test shall be carried out for every 10 tonnes of a cast and part thereof. One additional test shall be made for each variation in diameter.

lo;2 Shear strength for wire conforming to this standard shall not he less than 270 MPa for annealed condition and 300 MPa for drawn condition. The shear strength test shall be carried out in accordance with IS : 5242- 1979+,.

*Method for tensile testing of steel products (jif;rst revision ). tMethod for tensile testing of steel wire (first revision ). $Method of test for determination of shear strength of mild steel (jirst revision ).

6

IS:7557-1982

11. DUMP TEST

11.1 One dump test shall be made from the furnished steel for every 10 tonnes of a cast or part thereof. done additional test shall be made for each variation in diameter.

11.2 The test piece having a length equal to twice its diameter, cut from the wire shall, at room temperature, withstand without fracture and shall not reveal any harmful cracks while being compressed to half its length.

11.3 Minor surface flaws which do not tend to open out wider than 0.4 mm + 0.04 times the diameter of the steel wire shall not be the cause for rejection. For special applications, the limit for minor surface defects shall be as agreed to between the purchaser and the manufacturer.

Xl.4 No dump test shall be carried out on wire below 6 mm in diameter.

12. BEND TEST

12.1 One bend test shall be carried out for every 10 tonnes of a cast or part thereof. One additional test shall be made for each variation in diameter.

12.2 The test piece, when cold, shall withstand without fracture, being bent through an angle of 180” round a radius not greater than half of its diameter.

13. PACKING AND MARKING

13.1 Each coil of wire shall be bound and fastened compactly and a metal tag marked with the following shall be attached to each coil:

a) Manufacturer’s name or trade-mark,

b) Cast number or identification mark by which the steel can be traced to the cast from which it was made, and

c) Diameter, mass and condition of the wire.

13.2 The material may also be marked with the IS1 Certification Mark.

NOTE - The use of the ISI Certification Mark is governed by the provisions of the Indian Standards Institution ( Certification Marks ) 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 system of inspection, testing and quality control which is devised and supervised by IS1 and operated by the producer. IS1 marked products are also continuously checked by IS1 for conformity to that standard as a further safeguard. Details of conditions under which a licence for the use of the IS1 Certification Mark may be granted to manufacturers or processors, may be obtained from the Indian Standards Institution.

7

INTERNATIONAL SYSTEM OF UNITS ( SI UNITS )

Base Units

QUANTITY

Length

Mass

Time

Electric current

Thermodynamic temperature

Luminous intensity

Amount of substance

Supplementary Unitm

QUANTITY

Plane angle Solid angle

Derived Units

QUANTITY

Force

Energy

Power

Flux Flux density

Frequency

Electric conductance

Electromotive force

Pressure, stress

UNIT

metre

kilogram

second

ampere

kelvin

candela

mole

UNIT

radian

steradian

UNIT

newton

joule

watt

weber

tesla

hertz

siemens

volt

Pascal

SYMBOL

lx3

kg

A

K

cd

mol

SYMBOL

rad sr

SYMBOL

N

J W

Wb

T

HZ

s

V

Pa

DBFINITION

1 N = 1 kg.m/ss

1 J = 1 N.m

1 W=lJ/s

1 Wb = 1 V.s

1 T = 1 Wb/m

1 Hz = 1 c/s (s-1)

1 S = 1 A/V

1 V = 1 W/A 1 Pa = 1 N/ma