18 1079 : 1994 ( Reaffirmed 1998 ) area ars aed afer areaet FeTT HY TEST wa ofaat — fafarfte ( staat grterr ) Indian Standard HOT ROLLED CARBON STEEL SHEETS AND STRIPS — SPECIFICATION ( Fifth Revision ) First Reprint MAY 1995 URC 669°14-41-122°3 © Bis 1994 BUREAU OF INDIAN STANDARDS MANAK BHAVAN, 9 BAHADUR SHAH ZAFAR MARG NEW DELHI 110002 January 1994 Price Group 3‘Wrought Steel Products Sectional Committee, MTD 4 FOREWORD ‘This Indian Standard ( Fifth Revision) was adopted by the Bureau of Indian Standards, after the draft finalized by the Wrought Steel Products Sectional Committee had been approved by the: Metallurgical Engineering Division Council ‘This standard was first published in 1958 and subsequently revised in 1962, 1968, 1973 and 1988. While reviewing this standard in the light of experience gained during these years, ‘the Committee decided to revise it to align with the present practices being followed by the Indian Industry. In this revision, the following changes have been made: i) Only Grades 0, D, DD and EDD of hot rolled carbon steel sheets and strips have bem retained. The other three grades, that is Grades Fe 330, Fe 410 and Fe 590 have been deleted which are now covered in IS 5986 : 1992 “Hot rolled steel plates, sheets, strips and flats for flanging and forming operation’. ii) Tensile properties have been modified. For the purpose of deciding whether a particuler requirement of this standard is complied with, the final value, observed or ~alculated, expressing the result of a test or analysis, shall be rounded off in accordance with IS 2 : 1960 ‘Rules for rounding off numerical values ( revised )'. The number of significant places retained in the rounded off value should be the same as that of the specified value in this standard.IS 1079 : 1994 Indian Standard HOT ROLLED CARBON STEEL SHEETS AND STRIPS — SPECIFICATION ( Fifth Revision ) 1 SCOPE This standard covers the requirements for hot rolled carbon steel sheets including pack rolled sheets and strips intended for cold forming, drawing and general engineering purposes. 2 REFERENCES The following Indian Standards are necessary adjuncts to this standard: IS No. Title 228 Method for chemical analysis of steel 1599: 1985 Method for bend test “( second revision ) 1608: 1972 Method for tensile testing of steel products (first revision ) 1663: 1972 Method for tensile testing of ‘steel sheet and strip of thickness O'S mm to 3 mm (first revision ) 1730: 1989 Dimensions for steel _ plates, sheets, strips and flats for general engineering purposes (second revision) 1852: 1985 Rolling and cutting tolerances for hot rolled steel products 8910: 1978 General technical delivery requirements for steel and steel products 10175: 1982 Method for modified erichsen cupping test for metallic sheet and strip 3 SUPPLY OF MATERIAL 3.1 General requirements relating to the supply Of hot rolled carbon steel sheets and strips. shall conform to 1S 8910 : 1978. 3.2 Hot rolled carbon steel sheets and strips shall be supplied either with mill edges or flattened and sheared edges. In case of strips in coil form, width above 1500 mm may supplied with mill edges only. Strips of width below 1 500mm Toay be supplied either with mill or sheared edges -4 GRADES “There shall be 4 grades of hot rolled carbon steel sheet and strip designated as follows: 8) 0 — Ordinary quality ~ intended for general fabrication purposes where sheets or strips are used in the flat or for bendi rate. forming and welding operations ig intended for ¥) DD — Drawing quality] intended for ©) DD —Deep drawing | where draw- ‘ualty fog, fevers forming an 4) EDD — Extra deep drawing quality | joey *? $ MANUFACTURE S54 Stel shall be manufactured by any process el making at the discretion of the manufacturer. 5.2 Steel sheets and strips shall be supplied in the rimmed semi-killed or killed condition as agreed to between the purchaser and the manu. facturer, However, EDD grade shall be supplied in Killed condition only. 6 CHEMICAL’COMPOSITION 6.1 Ladle Analysis Ladle analysis of the material when carried out either by the method specified in the relevant part of IS 228 or any other established instru- ‘mental/chemical method, shall be as given in Table 1. In case of dispute, the procedure given in the relevant part of 1S 228 shall be the referce method. 6.2: Product Aualysis, Permissible variations in case of product analysis from the limits specified in ‘Table 1 shall be as given in Table 2. 7 TENSILE TEST 7.4 Nomber of Tensile Tests One tensile test shall be taken from each lot of 50 t of material or a part thereof from each cast. However, in case of material supplied after heat treatment, one tensile test shall be conducted. for each heat treatment batch or a lot of $0't whichever is less.IS 1079 : 1994 Table 1 Chemical Composition ( Clause 6.1) ‘Grade Constituent Percent, Max “Carbon Manganese Sulphur Phosphorus} o @ oOo o ° ous 060 0055 oss D on 050 004 = 0-040 DD 019 040 0-035 003s EDD 08. 040 0030 0030 NOTES 1 Steele of these grades can be supplied with the Mddition of microsiloying clement like "boron, {teal feb and vanagion, he ier tloying elements shal not excee cent 0 fase of boron aad 0-20 percent in cake of olber ‘lements. 2 The nitrogen content of the steel shall not be ore than 0.007 percent, For aluminiurs ‘killed or ilicon-aluminium killed, the nitrogen ‘content Shall not exceed 012 percent. Thit as to be fetored bythe manufactter by ocsisional check 3. Grade EDD shall be supplied in fully alursioium Killed condition onl 4. Wheg the steel is aluminium Killed, the total ‘Aluminium content shall not be less. than 0-02 Dereent. When the sel is silicon killed, the silicon Gentent shall‘not be fess than O'percent. When the steel is aluminium silicon kifea, the silicon Content shall not be less. than 0-0) ‘percent and sminium conteat shall not be lese than 0-01 '5 When copper bearing steel is required the copper ontent shall be Detween 0'20 and 0'35 percent. fe case of product analysis. the copper content hall be between 017 and 0-38 percent, 6 For pack rolled sheets of grade 0, the phosphorus Content can be relaxed up to” O09 percent by ‘mutual sgreement between the purchaser and the supplier . 17 Resisicted chemistry for EDD grade may be ‘mutually agreed to between the purchaser and the supplier. Table 2 Permissible Variations for Product Analysis (Clause 6.2) Constituent — Percentage Liwit of Variat ‘Constitaent Over Speeited Limit, Percent, ‘Max w @ @ carbon Uptoo23 02 Manganese Uptoo-so 003 Above 0-50 0-04 Sulphur 0-005 Phosphorus o-005 ‘NOTE — Product analysis shall not be applicable ‘torimming steel, 2 7.1 Where sheet ond strip of more than one: thickness are rolled from the same cast, one additional tensile test shall be made for'each thickness of sheet and strip. 1.2 Tensile Test Pieces Tensile test pieces shall normally be cut transverse to the direction of rolling. Longi- tudinal test pieces may be cut in the case of strips having width less than 150 mm. 7.3 When {ested in accordance with IS 1663: 1972 or IS 16C8 : 1972 as applicable, the tensile strength, yield stress and percentage elongation shall be as given in Table 3. Table 3 Tens ‘e Properties (Claus 3) “Grade Tensile Yield Percent Elongation Strength, Stress, at Gauge Length MPa Mie’ Ses ''S0, Bin MPa w @ ° wo ° — - ~ D 240.400 = 2s DD 260.390 - 24 EDD 260-380 - 2 TBA Should a test piece break outside the middle half of its gauge fength and the percentage elongation obtained is iess than that, specified, the test may be discarded at the option of the manufacturer aad anotiier est made from the sample selected representing the same cast and batch. 8 BEND TEST ‘One bend test shall be taken from ench lot of 50t of material or a part thereof from each cast. However, in the case of material supplied after heat-treatment, one bend test shall be conducted for each heat-treated batch or alot of 50 t, whichever is less. 8.1.1 When material is supplied in coils, one bend test shall be conducted from cither end of the coil 8.1.2 When sheet and strip of more than one, thickness are rolled from the same cast, one additional bend test shall be made for each thickness of sheet and strip. 8.2 Bend test shall be carried out with IS 1599 : 1985. accordance: 8.2.1 Bend test piece shall be cut so that the axis of the bend is parallel to the direction of rolling, that is, the longer axis of the test piece: shall be at 90° to the direction of rolling.8.2.2 The test piece shall be bend cold through 180°. The internal diameter of the bend for different grades of material shall be as given in Table 4. “The test pieces shall be deemed to have passed the test if the outer convex surface is free from cracks after complete bending. Table 4 Internal Diameter of Bend ( Clause 8.2.2) Grade Toternal Diameter of Bend ° 2 D ' pp Close EDD Close Where tis the thickness of test piece. 8.2.2.1 ILis sometimes difficult to ensure that the material is accurately following the radius, Incase of dispute, the test piece may be pushed into block of lead by a former of ‘appropriate diameter. 9 CUPPING TEST 9.1 Cupping test as specified in 1S 10175 : 1982 ‘may be carried out only for sheets and strips of D, DD and EDD grades having thickness from O'S mm up to 2mm, if agreed to between the purchaser and the supplier. 9.2 The cupping test values shall be agreed upon between the purchaser and the suppl 10 STRAIN AGEING TEST 10.1 The test is to be carried out om where steel is supplied with non-ageing. properties/evarantee. This shall be agreed to beiween the purchaser and the supplier. 10.2 Selection of ymple ‘The sample shail be selected in such a way that the axis of bend is parallel to the direction of final rolling, In case of material too narrow, to emit this, the axis of bend shall be of 90° to the direction of rolling, 10.3 Size of test piece shall be as follows: Thickness Size Below 3mm 75 mm long and 25 mm wide 3mmand above 75 mm long and 40 mm wide For smaller sizes, the maximum obtainable width shall be taken. ‘The edges of the test pieces shall be rounded ‘or smoothed longitudinally to an approximate semicircle. ‘YS 1079 : 1994 10.4 The test piece shall be bent cold through 90° over a radius equal to one and a half times the thickness, about an_axis at right angles to the length of the ‘test piece. ‘Them’ the piece shall be heated at 100°C for 1h ( or at 325 to- 350°C for 15 min) and the sample cooled. “The test picce shall be fattened by hammer and the piece shall not develop crack near the bend. 11 RETEST Should any one of the tests pieces, first stléc- ted, fail to pass any of the tests specified in this standard, two further semples shall be selected from the sare lot for testing in respect of each failure, Should the test pieces from both these additional samples pass, the material represen- ted by the test sample shall be deemed to comply with the requirement of thet particular test, Should the test pieces from either of these additional samples fail, the material represented by the test sample shali be deemed as not conforming to this standard. 12 FREEDOM FROM DEFECTS 12.1 The finished material in cut lengths shall be free from harmful defects which will affect the end use. When the material is supplied in the form of coils, the degree or amount of surface defects are expected to be more than i cut length sheets since the inspection of coil does not afford the same opportunity to reject the portion containing defects as with cut Tength. However, an excessive number of defects may be a cause for rejection. The standards for acceptance in such cage can be agreed to between the purchaser” and the supplier. 12.2 Steel sheets supplied shall be free from coit breaks and waviness in accordance with the purchaser's requirements. 12.3 Edges may be mill edges or slit edges as. agreed to between the supplier and purchase When mill edges are specified, the depth of the defects shall be within 5 mm from the edge of the coils on both sides. 13 DIMENSIONS AND TOLERANCES 13.1 Dimensions of steel sheet and strip shall Sonform to the dimension specified in 18 1730 : 1989. 13.2 Tolerances on length, width, thickness and mass of the steel sheet and strip ‘shall conform to the limits specified in IS 1852 : 1985. 13.3 The edge camber that is, lateral departure: Of the edge of the material from a straight line forming chord ( see Fig. 1) of hot rolled steel shpets, including descaled sheets, in cut lengths55 1079: 1994 and coil shall not exceed the tolerances given elow: Form Camber Tolerance ( Max) * Cut length 0°S percent * length Coil 25 mm in any 5.000 mm length NOTE — Camber is the greatest 4 side edge from 2 straight line, the being’ takea en the concave cage. ha aight SIDE EDGE yomees Fig. | Epos Cause 13.4 Flatness Tolerances When the sheets are required to be supplied in the flattened condition either by roller or stretcher, levelling the permissible maximum flatness (‘see Fig. 2) shall be as given in Tables 5 to7. NOTE — Maximum deviation from a flat horl- zontal surface with the sheet lying under its own fase with the concave side uppermost on a fat Surface, the maximum distance between the lower Surface of the sheet an the fat horizontal surface {tthe maximum daeviation from flatness. MAXIMUM DEVIATION FROM FLAINESS Fig. 2 FLATNESS TOLERANCE ‘Table 5 Standard Flatness Tolerances for Hot Rolled Steel Sheet ( Including Descaled Sheet } ‘Cat Lengths (Clause 13.4) All dimensions in millimetces. “Thick wie Upto2 Upto 200 ‘Above 1 200 up to 1 500 ‘Above 1.500 Upto 1200 ‘Above 1 200 up to 1 500 Above 1 500, Above 2 ‘Thiekoces ‘Table 6 Special Flatness Tolerances for Hot Rolled Steel Sheet ( Including Descaled Sheet ), Rolled Levelled Standard Cat Lengths (Clause 13.4) All dimensions ia millimetres. wise Length | Flatness Tolerance Upto2 Upgo 1200 Upto 2500 9 ‘Above 1200 Above 2.500 15 Above2 Upto 1200 Upto 2500 8 ‘Above 1 200 Above 2.500 B Thlekness ‘wiet Length Fl ‘Tolers Upto 2 Upto 1200 Upto2s00 0 § ‘Above 1200 Above 25000 8 Above2 Upto 1200 Upto 250 = 3. Above 1200 Above 2500 6 ‘Table 7 Special Flatuess Tolerances for Hot Rolled Sheets ( Including Desealed Sheet ), Stretcher Levelled Standard Cat Length ( Clause 13.4) All dimensions in millimetres. [NOTE — These tolerances are applicable for sheets ‘upto $ metres in length, For sheets supplied in treater lengths, the tolerances, shall be as agreed {0 between the purchaser and the manufacturer. 13.8 Out-of-Square Tolerances The out-of-square tolerance for sheets ‘of all fiages and all ize shall be 10 péceat of width ‘see Fig. 3). NOTE —Outof-square isthe greitest deviation Of aa edge from a straight tine diawn af a sight ‘ngle to the other edge of the sheet, touching one ‘comet and extending the opposite edge. Fig. 3 MEASUREMENT OF OUT-OF-SQUARENESS 14 CALCULATION OF WEIGHT ‘The mass of the material shall be calculated on the basis that steel weighs 7°85 giem*.415 DELIVERY 15.1 The material may te supplied in any one Cor, in combinaticn ) of the following condi- tions subject to mutual agreement between, the supplier and the purchaser: 8) Hot rolled, b) Annealed, ©) Normalized, and 4) Desealed. 18.2 Subject to prior agreement between the manufacturer and the purchaser, a suiteble protective treatment may be given to the material. 16 MARKING 161 Sheets shall be supplied in bundles, and IS 1079 : 1994 strips either in bundles or coils. The mass of the bundle or coil shall not exceed 12°5 tonnes. Each bundle or coil shall carry a metal tag bearing the cast number and the manufacturer's name or trade-mark, Alterratively, the top sheet or strips in each bundle shall'be legibly marked with the cast number, name of the ‘manufacturer or trade-mark. 16.2 Standard Marking The material may also be marked with Standard Mark. 16.2.1 The use of the Standard Mark is governed, by the provisions of Bureau of Indian Standards ‘Act 1986, and the Rules and Regulations made thereunder. The details of conditions under which the licence for the use of Standard Mark may be granted to manufacturers or producers may be obtained from the Bureau of Indian Standards.Bureau of Indian Standards BIS is a statutory institution established under the Bureau of Indian Standards Act, 1986 to promote harmonious development of the activities of standardization, marking and quality certification of gcods ‘and attending to connected matters in the country. Copyright 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 preclude the free use, in the course of implementing 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 Standards Amendments are issued to standards as the need arises on the basis of comments, Standards are also reviewed periodically; a standard along with amendments is reaffirmed when such review indicates that no changes are needed; ifthe review indicates that changes are needed, itis taken up for revision. Users of Indian Standards should ascertain that they are in possession of the latest amendments or edition by referring to the latest issue of ‘BIS Handbook’ and ‘Standards Monthly Additions’. ‘This Indian Standard has been developed from Doc : No. MTD 4 ( 3933 ) “ Amendments Issued Since Publication ‘Amend No. Date of Issue ‘Text Affected BUREAU OF INDIAN STANDARDS: ‘Headquarters: Manak Bhavan, 9 Bahadur Shah Zafar Marg, New Delhi 110002 Telegrams : Manaksanstha ‘Telephones : 323 01 31, 323 83 75, 323 94 02 (Common to all offices) Regional Oftices : Telephone Central: Manak Bhavan, 9 Bahadur Shah Zafar Marg 323.7617 NEW DELHT 110002 323.3841 Eastern: V4 C. LT. Scheme VIIM, V. I.P. Road, Manikiola 337 84 99, 337 85 61 CALCUTTA 700054 337 86 26, 337 91 20 Northern: $CO 335.336, Sector 34-A, CHANDIGARH 160022 6038 43 660.2025 Southern : C. 1. T. 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Printed at Patograph, New Delhi (INDIA),AMENDMENT NO. 1 JUNE 1996 TO IS 1079: 1994 HOT ROLLED CARBON STEEL SHEETS AND STRIPS — SPECIFICATION (Fifth Revision ) (Page 1, clause 2 a) Substitute “1608: 1995 Mechanical testing of metals — Tensile testing (second revision J for "1608 : 1972 Method for tensile testing of steel products (first revision J. 1b) Delete ‘1663 : 1972 Method for tensile testing of stee! sheet and strip of thickness 0.5 mm to 3 mm (first revision ). ©) Substitute “10175 ( Pat 1) : 1993 Mechanical testing of metals — Modified crichsen cupping test — Sheet and strip: Part 1 Thickness up to 2 mm ( first revision J’ for ‘10175 : 1982 Method for modified erichsen ‘cupping test for metallic sheet and strip’. (Page 2, clause 73, fines 1 and 2) — Substitute ‘IS 1608 : 1995" for “IS 1663 : 1972 or IS 1608 : 1972 a8 applicable’. ( Page 3, clause 9.1, ine 1) — Substitute "IS 10175 ( Past 1): 1993" for "1S 10175 : 1982" (Page 5, clause 16.1, line 3) — Delete the words ‘or coil’. (ump 4) ‘Reproprapiy Unit, BS, New Bel, diaAMENDMENT NO. 2 OCTOBER 1997 To IS 1079: 1994 HOT ROLLED CARBON STEEL SHEETS AND STRIPS — SPECIFICATION (Fifth Revision) ( Page 3, clause 13.1, line 1) — Insert at the beginning ‘Unless agreed otherwise,’. (MTD 4) ——__ Printed at Prntograph, New Delhi (NDIA)AMENDMENT NO. 3 APRIL 2002 TO IS 1079: 1994 HOT ROLLED CARBON STEEL SHEETS AND STRIPS — SPECIFICATION (Fifth Revision ) (Page 1, clause 7.1) — Substitute the following for the existing: “TA. Number of Tensile Tests ‘Number of samples to be tested from a casUeat shall be as follows: 1) for casteat size up to 100 tonnes —2 samples, ») for cast size between 100-200 tonnes — 3 samples, and ©) for cast size over 200 tonnes — 4 samples. However, in case of material supplied after heat treatment, one tensile test shall bbe conducted for each heat treatment batch or a lot of 50 tonnes, whichever is less” (MTD 4)AMENDMENT NO. 4 NOVEMBER 2002 TO IS 1079: 1994 HOT ROLLED CARBON STEEL SHEETS AND STRIPS — SPECIFICATION (Fifth Revision ) ( Foreword ) — Insert the following before last para: “For all the tests specified in this standard (chemical/physical/others), the method as specified in relevant ISO standard may also be followed as an alternate method.” cmp 4), _—— ‘Reprograpy Uni, BIS, New Del, dia