280 mild steel wire

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IS 280:2006

Indian StandardMILD STEEL WIRE FOR GENERAL ENGINEERING

PURPOSESFourth Revision)

ICS77.140.65

0 BIS 2006BUREAU OF INDIAN ST AN DA RD-SMANAK BHAVAN, 9 BAHADUR SHAH ZAFAR MARG

NEW DELHI 110002March 2006 Price Group 2


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Wrought Steel Products Sectional Committee, MTD 4

FOREWORDThis Indian Standard (Fourth Revision) was adopted by the Bureau of Indian Standards, after the draft finalized by theWrought Steel Products Sectional Committee had been approved by the Metallurgical Engineering Division Council.This standard was first published in 1951 and revised in 1962, 1972 and 1978.In this revision, following changes have been made:

a) All the three Amendments issued have been incorporated.b) Clause on reference of Indian Standard has been modified.

For all the tests specified in the standard (chemical/physical / others), the method as specified in relevant 1S0 standardmay also be followed as an alternate method.For the purpose of deciding whether a particular requirement of this standard is complied with the final value, observedor calculated, expressing the result of a test or analysis, shall be rounded off in accordance with IS 2:1960 Rules forrounding off numerical values (revised. The number of significantplaces retained in the.rounded ofivalue should bethe same as that of the specified value in this standard.


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IS 280:2006Table 1 Tolerances on Diameter of Wire

Chmse-8All dimensionsin millimetres.

Size ofWire

I)All finishesother thangalvanized:UP to 0.25Over 0.25 upto 0.50OVer0.50 upto 1.00over 1.00upto 1 5Over 1.50 upto 2.50Over 2.50 upto 5.00Over 5.0Galvanized:All sizes

Tolerance MaximumDifferenceBetween Two ReadingsTaken onAny TwoDiameters on theCross-Section

2) 3)

i 0.010.015+.0.02* 0.03* 0.04* 0.05 0.06+ 2.5 percentwith

a minimum of 0,025

0.010.0150.020.030.040.050,062.5 percentwith

a minimum of0.025

Table 2 Tensile PropertiesC/azfse 9.1)

Condition Tensile Strength/FinishesOther Than Galvanized

GalvanizedMPa MPa

1) 2) 3)Annealed 500 Max 300-550Soft drawn 550 Max . hard 450-650 1/2hard 600-800 Hard 700-950 550-900NOTES1 1MPa = lN/mm2 = IMN/m2 = 0.1020 kgf/mm2.2 Restrictedrangesof tensile strengthin caseof galvanizedwire maybe agreedto atthe time of enquiry andorder.withstandwithout breaking or splitting being wrappec ~ighttimes round its own diameter and subsequentlystraightened.9.3 Bend TestWire of 5 mm diameter and over shall be subjected tobend test. Thewire shall withstand being bent through anangle of 90 round a former of diameter equal to twice itsown diameter without breaking or splitting.10 -FINISHThe wire shall have one of the following finishes asspecified by the purchaser:

a) Annealed;b) Annealed, cleaned and limed;c) Bright drawn;d) Dull grey (dry drawn);e) Galvanized;f) Coppered;g) Tinned; andh) Coated and drawn (coating may-be of tin, copper

or zinc).11 COATING TEST11.1 The galvanized coating of steel wire shall conformto the requirements for any one of the types of coatingsgiven in IS4826 as per agreement with the purchaser. Thecoating requirements of electro galvanized wires shallconform to the requirements for-any one of the typescoating given in M 12753 or as agreed to between thepurchaser and the manufacturer.11.2 The coating test for finishes other than galvanized,copper coated or tinned shall be subject to agreementbetween the purchaser and the manufacturer.12 SAMPLINGUnless otherwise agreed to, the method of drawingrepresentative samples of the material and the criteria forconformity shall be as prescribed in Annex A.13 FREEDOM FROM DEFECTSAll finished wires shall be well and cleanly drawn to thedimensions specified. The wire shall be sound, free flomsplits, surface flaws, rough jagged and imperfect edgesand other harmful surface defects.14 PACKINGEach coil of wire shall be suitably bound and fastenedcompactly. If required by the purchaser, each coil shallbe protected by suitable wrapping.15 MARKING15.1 Each coil of wire shall be marked legibly with thefinish, size ofwire, lot number and trade-mark or the nameof the manufacturer.15.2 BIS Certification MarkingThe material may also bemarked with the Standard Mark.15.2.1 The use of standard mark is governed by theprovisions of the Bureau oflndian Standards Act, 1986and the Rules and Regulations made thereunder. Thedetails of conditions under which the Iicence for the useof the Standard Mark maybe granted to manufacturers orproducers may be obtained from the Bureau of IndianStandards.

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IS 280:2006ANNEX AClause 12

SAMPLING AND CRITERIA FOR CONFORMITY

A-1 LOTA-1.l In any consignment, all the coils of wire of thesame grade and diameter, manufactured under essentiallysimilar conditions of manufacture, shall be groupedtogether to constitute a lot.A-1.l.l Samples shall be taken from each lot and testedfor ccmformity to the standard.A-2 SAMPLINGA-2.1 The number of coils to be taken from a lot shall beaccording to COI2 and 4 of Table 3. These coils shall bechosen at random (see IS 4905). Samples shall be cutfrom each coil so chosen as per A-3.1 and A-3.2 forphysical and chemical requirements.

Table 3 Scale of Sampling and Permissible Numberof DefectiveClauses A-2.1, A-3.1 and A-3.2)

No.of Coils No. of Coils Permissible No. of Coilsin a Lot for Phydcal Defective for ChemicalRequirements Requirements1 2 3 4

upto25 2 0 126-50 3 0 151-150 5 0 2151-300 8 I 2301 and above 13 1 2

A-3 PREPARATION OF SAMPLES AND NUMBEROF TESTSA-3.1 Tests for Physical RequirementsFrom the coils selected from col 2 of Table 3, adequatelength of test piece shallbe cut from each end and subjectedto physical tests, namely, size, surface condition, tensile,bend, wrapping and coating tests. A test piece failing tomeet any of the requirements shall be called a defective.If the number of defective found is less than or equal tothe permissible number of defective specified in COI3 ofTable 3, the lot shall be considered to have conformed tophysical requirements.A-3.2 Tests for Chemical RequirementsUnless otherwise agreed, the following procedure shallbe followed for chemical requirements:

From those test pieces which have conformed to physicalrequirements, further test pieces shall be selected atrandom according to COI4 of Table 3. These samplesshall be tested for all the chemical requirements. If atest piece fails to meet the respective chemicalrequirements, it shall be called a defective. The lot.shallbe considered to have conformed to the chemicalrequirements, if all the individual test pieces tested forchemical requirements pass the test.

A-4 CRITERIA FOR CONFORMITYA lot shall be considered to have conformed to therequirements of the specification, ifA-3.1 and A-3.2 aresatisfied.


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Bureau of Indian StandardsBIS is a statutory institution established under the Bureau of Indian Standards Act, 1986 to promoteharmonious development of the activities of standardization, marking and quality certification of goodsand attending to connected matiers in the country.CopyrightBIS has the copyright of all its publications. No part of these publications may be reproduced in any formwithout the prior permission in writing of BIS. This does not preclude the free use, in the course ofimplementing the standard, of necessary details, such as symbols and sizes, type or grade designations.Enquiries relating to copyright be addressed to the Director (Publications), BIS.Review of Indian StandardsAmendments are issued to standards as the need arises on the basis of comments. Standards are also reviewedperiodically; a standard along with amendments is reaffirmed when such review indicates that no changes areneeded; if the review indicates that changes are needed, it is taken up for revision. Users of Indian Standardsshould ascertain that they are in possession of the latest amendments or edition by referring to the latest issue ofBIS Catalogue and :St dards-: Monthly Additions.This Indian Standard has been developed from Doc :No. MTD 4 (4432).

Amendments Issued Since PublicationAmend No. Date of Issue Text Affected

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Pmted at Rabhat Offset Press, New Delhi-2

280 mild steel wire

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