IS-1570-1

IS : 1570 (Part I) - 1978(Reaffirmed 1998) Edition 2.1 (1981-01) Indian Standard SCHEDULES FOR WROUGHT STEELS PART I STEELS SPECIFIED BY TENSILE AND/OR YIELD PROPERTIES ( First Revision ) (Incorporating Amendment No. 1) UDC 669.14.018.295(083.4) © BIS 2003 BUREAU MANAK BHAVAN , 9 BAHADUR SHAH ZAFAR MARG NEW DELHI 110002 OF INDIAN STANDARDS Price Group 4 C. DIAS SHRI M. K. BASU ( Alternate ) SHRI B. B. K. Durgapur Ministry of Defence (DGI) National Metallurgical Jamshedpur Laboratory (CSIR). MUKHERJEE Members SHRI A. New Delhi The Indian Tool Manufacturers Ltd. BISWAS SHRI S. K. Bombay Steel Authority of India Ltd (Alloy Steels Plant). M. BISWAS ( Alternate ) Guest. K. SHRI P. Howrah Representing Steel Authority of India Ltd (Alloy Steels Plant).IS : 1570 (Part I) . N. MUKHERJEE ( Alternate ) SHRI P. C. GHOSH ( Alternate ) SHRI A. Keen. Williams Ltd. DATTA SHRI R. K. D. GUPTA SHRI P. GYNE ( Alternate ) ( Continued on page 2 ) © BIS 2003 BUREAU OF INDIAN STANDARDS 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. K. Navsari SHRI B. M. CHAUDHURY SHRI DASARATHA SHRI S. Durgapur The Visvesvaraya Iron & Steel Ltd. Directorate General of Supplies and Disposals (Inspection Wing). V. CHATTERJEE SHRI K. Calcutta The Tata Iron & Steel Co Ltd. Bhadravati Ahmedabad Advance Mills Ltd. CHAKRAVARTY DR T. DATAR SHRI M. BISWAS SHRI P. JHA ( Alternate ) SHRI S. BASAVARAJ ( Alternate ) . K. GANGOPADHYAY ( Alternate ) National Test House. C.1978 Indian Standard SCHEDULES FOR WROUGHT STEELS PART I STEELS SPECIFIED BY TENSILE AND/OR YIELD PROPERTIES ( First Revision ) Alloy Steels and Special Steels Sectional Committee. Jamshedpur SHRI A. SMDC 19 Chairman DR G. RAMA RAO. R. BIS ( Ex-officio Member ) Director (Struc & Met) Secretary SHRI VIJAY KUMAR Assistant Director (Metals). MEDIRATTA ( Alternate ) SHRI M. ROY The Tata Engineering and Locomotive Co Ltd. ISI Subcommittee for the Revision of Schedule for Wrought Steels for General Engineering Purposes. M. S. C. RANGASHAI Hindustan Machine Tools Ltd. Howrah ( Continued on page 15 ) 2 . K. S. Bombay. K. KHARE SHRI V. SRINIVASAN Steel Furnace Association of India. N. BASU The Tata Iron & Steel Co Ltd. N. BHATIA ( Alternate ) SHRI K. KOTHAWALE Bharat Forge Co Ltd. Ranchi SHRI D. NARAYANA ( Alternate )Mahindra Ugine Steel Co Ltd. Jamshedpur Guest. Bangalore SHRI SANJIT SEN ( Alternate-I ) SHRI P. New Delhi SHRI I. N.IS : 1570 (Part I) . K. and Alloy Steel Producers’ Association of India. VAIDYANATHAN SHRI C. CHATTERJEE ( Alternate ) SHRI Y. M. SUBRAHMANYA Ministry of Defence (DGOF) M. Jamshedpur DR S. Bombay SHRI M. PADMANABHAN SHRI I. BANERJEE ( Alternate ) Ashok Leyland Ltd. Ranchi SHRI S. Thane SHRI B. Keen. LAKKUNDI ( Alternate ) DR D. Bombay SHRI S. Calcutta DR S. Madras SHRI A. SAHA ( Alternate ) DR V. SMDC 19 : 5 Convener SHRI P. S. PAI Firth India Steel Co Ltd. MONDAL ( Alternate ) SHRI D. P. N. Williams Ltd.1978 ( Continued from page 1 ) Members Representing JOINT DIRECTOR (MET) RESEARCH Ministry of Railways DESIGNS AND STANDARDS ORGANIZATION DEPUTY DIRECTOR (MET-II) RDSO ( Alternate ) Indian Register of Shipping. V. LAHIRI Ministry of Defence (R & D). K. Calcutta SHRI K. PATHY Mahindra Ugine Steel Co Ltd. RAMA PRASAD ( Alternate-II ) SHRI A. Calcutta SHRI S. K. PAI ( Alternate ) DR R. Dastur & Co Pvt Ltd. Bombay SHRI R. DAS ( Alternate ) SHRI L. J. PANDAY ( Alternate ) SHRI R. K. R. DAVE ( Alternate ) SHRI C. R. Director General. MEHRA Heavy Engineering Corporation Ltd. K. CHAKRAVARTY Members SHRI S. Pune SHRI S. Mundhwa. S. MISHRA Director General of Technical Development. PRAMANIK Iron & Steel Control. New Delhi SHRI M. RAMASWAMY Research & Development Centre for Iron and Steel (SAIL). K. 2 Schedules for wrought steels for general engineering purposes (IS : 1570-1961) was first published in 1961.IS : 1570 (Part I) . St 42. after the draft finalized by the Alloy Steels and Special Steels Sectional Committee had been approved by the Structural and Metals Division Council. St 50. 0. the Sectional Committee has decided to revise the standard and issue it in parts. *Already published as IS : 1570 (Part V)-1972.3 The following major modifications have been made in this revision: a) Steel designations have been modified in accordance with IS : 1762 (Part I)-1974†. St 55 and St 63.1 This Indian Standard (Part I) (First Revision) was adopted by the Indian Standards Institution on 20 November 1978. A new grade St 70 has been added to cover the values of tensile between St 63 and St 78. The other parts of the standard are as follows:* Part II Part III Part IV Part V Part VI Carbon steels Carbon and carbon manganese free cutting steels Alloy steels (excluding heat-resisting steels) Tool steels stainless and Stainless and heat-resisting steels* 0. St 47. b) Grades St 39. for the sake of easy identification old designations are also given within brackets. St 52. St 58 and St 66 given in IS : 1570-1961 have been deleted as the tensile ranges covered by these grades are already available in grades St 37. †Code for designation of steels: Part I Based on letter symbols ( first revision ). However. On the basis of the experience gained in the production and use of steels. F O R E W O R D 0.1978 Indian Standard SCHEDULES FOR WROUGHT STEELS PART I STEELS SPECIFIED BY TENSILE AND/OR YIELD PROPERTIES ( First Revision ) 0. St 44. 3 . 0.4 This schedule does not give limits for sulphur and phosphorus.5 Although both yield and tensile values have been specified in Table 1. SCOPE 1. 4 . sections. or revising the existing standards. forgings and tubes.1978 c) Each grade of steel has been sub-divided into two sub-grades. These ratios have been fixed after consulting the relevant Indian Standards and ISO Recommendations.7 For the purpose of deciding whether a particular requirement of this standard is complied with. one with a low yield to tensile ratio and the other with a high yield to tensile ratio. expressing the result of a test or analysis.IS : 1570 (Part I) . 0. 1. the yield value should be ignored if the specification is evolved on the basis of tensile strength. The standard ranges for sulphur and phosphorus and the method for designating steel according to its sulphur and phosphorus content. steel making practice and method of deoxidation is detailed in Appendix A for information. 2. The *Rules for rounding off numerical values ( revised ). These have to be specified in the detailed specifications. 0. bars. Side bar indicates modification of the text as the result of incorporation of the amendment. GENERAL GUIDELINES FOR THE USE OF THE SCHEDULE 2. when the main criterion in the selection and inspection of the steel is either the tensile strength or the yield stress which is used as a basis for design.1 incorporates Amendment No. Similarly the tensile strength should be ignored if the specification is based on yield stress.1 While preparing Indian Standards. steels listed in this schedule shall be selected.6 This edition 2.1 This schedule (Part I) is applicable to carbon and low alloy steels which are put into service in the hot-rolled. This schedule is not intended to be used as a standard. The number of significant places retained in the rounded off value should be the same as that of the specified value in this standard. observed or calculated. shall be rounded off in accordance with IS : 2-1960*. 1 (January 1981). the final value. 0. normalized or annealed condition in the form of plates. such as weldability.IS : 1570 (Part I) . 2. Since different levels of sulphur and phosphorus are required according to the severity of the conditions in service.65 A which is now internationally accepted.1978 specification of mechanical properties different from those given in this schedule should not be made unless special conditions of service render this essential. 2. For tensile tests on tubes.4 In addition to the tensile and yield stress. etc. it would be necessary to specify the silicon content. but the quality of the material is controlled. 5 .2 In the case of steels belonging to this schedule it is not usual to specify a detailed chemical composition. but should be specified in a specification at levels appropriate to the method of steel production. SMDC 19. *Method for elongation conversions for steel ( first revision ). for example. 2. are given in Table 1. in such cases. In some structural steels. this should be specified in the standard. are involved. values for the specified minimum percentage elongation. corresponding to the standard tensile ranges. copper content is found to be beneficial for increasing resistance to corrosion and. These elongation values are based on a gauge length of 5. by specifying the maximum permissible percentage of sulphur and phosphorus. and its approval obtained.3 Where special factors. where necessary. Where necessary. the specified percentage elongation should be based on the formula of 950 divided by the actual tensile strength when using a gauge length equivalent to 5. etc. semi-killed.65 A gauge length are used. should be included in the standard. In the case of killed and semi-killed variety of steel. conditions of service. full reasons for the proposed departure from the steels specified in this schedule shall be submitted to the Alloy Steels and Special Steels Sectional Committee. killed. it may be desirable to include a maximum limit on the carbon content in the specification. elongation conversions may be obtained from IS : 3803-1974*. In that event. If test pieces of other than 5. the type of steel.65 A or of 1 100 divided by the actual tensile strength in kgf/mm2 when using a gauge length equivalent to 4 A. limits for these elements are not included in the schedule. IS : 8500 — — — — — — — — — (5) (6) (3) N/mm2† 290 290 310 310 330 330 360 360 410 FeE 310 Fe 490 FeE 370 Fe 540 FeE 400 Fe 620 FeE 460 Fe 690 FeE 520 Fe 770 FeE 580 Fe 870 FeE 650 — (St 50) — (St 55) — (St 63) — (St 70) — (St 78) — (St 88) — 410 490 490 540 540 620 620 690 690 770 770 870 870 310 290 370 320 400 380 460 410 520 460 580 520 650 23 21 21 20 20 15 15 12 12 10 10 8 8 *Code for designation of steel: Part I Based on letter symbols ( first revision ). IS : 2831. IS : 5986 — IS : 226.81 N/mm2.4 ) NEW OLD DESIGNATION DESIGNATION [See IS : 1762 (PART I)1974*] (1) Fe 290 FeE 220 Fe 310 FeE 230 Fe 330 FeE 250 Fe 360 FeE 270 Fe 410 (2) (St 30) — (St 32) — (St 34) — (St 37) — (St 42) TENSILE STRENGTH. IS : 6915 — IS : 1079.65 A ) (4) N/mm2† 170 220 180 230 200 250 220 270 250 27 27 26 26 26 26 25 25 23 — — IS : 432. IS : 432. Min YIELD ELONGATION REFERENCE TO STRESS. ‡See Appendix B for titles. †1 kgf/mm2 = 9.IS : 1570 (Part I) . 6 . IS : 5986. IS : 1977. IS : 1148. IS : 6914.1978 TABLE 1 TENSILE AND YIELD PROPERTIES OF STANDARD STEELS ( Clauses 0. IS : 5986 — IS : 1979. IS : 3503. IS : 1079. INDIAN STANDARD‡ Min Min (GAUGE LENGTH 5. IS : 1977. IS : 2831. IS : 6915 — IS : 1079. IS : 3503. IS : 8500 — IS : 432. IS : 2100. IS : 3503. PERCENT. IS : 2830. IS : 1978. IS : 5272. IS : 3039.5 and 2. IS : 961. IS : 2062. the following symbols *Code for designation of steel: Part I Based on letter symbols ( first revision ). Part I fall in this category. Details of the new designation system are given in IS : 1762 (Part I)-1974*. STEELS DESIGNATED ON THE BASIS OF MECHANICAL PROPERTIES A-1.1978 APPENDIX A ( Clause 0.IS : 1570 (Part I) . A-1. Steels listed in this Schedule. whether the steel is killed. the figure shall be 00. by specifying certain quality levels. GENERAL A-0. semi-killed or rimming variety. c) Chemical symbols for characterize the steel. b) Figure indicating the minimum tensile strength or yield stress in N/mm2. provided the specified mechanical properties are attained it is not usual to specify a detailed chemical composition but the quality of the material is designated. elements the presence of which d) If necessary. If no minimum tensile strength or yield stress is guaranteed.1 These steels are carbon and low alloy steels where the main criterion in the selection and inspection of steel is the tensile strength or yield stress. The designation of these steels consists of the following in the order given: a) Symbol ‘Fe’ or ‘FeE’ depending on whether the steel has been specified on the basis of minimum tensile strength or yield strength. symbols indicating special characteristics as follows: 1) Method of Deoxidation — Depending upon.4 ) NEW SYSTEM OF DESIGNATION OF STEELS A-0. In such cases.1 The new system of designation of steel is based on the draft ISO proposal submitted by India to ISO/TC 17 ‘Steel’ for formulation of an international standard. where necessary. 7 . and Q5 — Internal homogeneity guaranteed. it shall mean that the steel is of semi-killed type.070 0.025 0. Q4 — Inclusion controlled.1978 shall be used to indicate the steel making practice: i) R for rimming steel.055 Sulphur 0.050 0.035 0. 8 .070 0.035 0.025 0.055 The above symbols use the letter ‘P’ followed by 1 000 times the maximum percentage of sulphur and phosphorus. *Rounding off shall be done according to the rules given in IS : 2-1960 ‘Rules for rounding off numerical values ( revised ). Q2 — Freedom from flakes. Q3 — Grain size controlled.IS : 1570 (Part I) . the following procedure shall be followed: Symbol SP shall be used to indicate the levels followed by:* i) 1 000 times the maximum sulphur rounded off* to the nearest integer. 3) Degree of Purity — The sulphur and phosphorus levels (ladle analysis) shall be expressed as follows: Symbol P25 P35 P50 P70 No symbol will mean Maximum Content in Percent                      Phosphorus 0. 2) Steel Quality — The following symbols shall be used to indicate steel quality: Q1 — Non-ageing quality. and ii) K for killed steel. NOTE — If no symbol is used. In case the maximum contents of sulphur and phosphorus are not same.050 0. ii) 1 000 times the maximum phosphorus rounded off* to the nearest integer. ‘B0’. B0. ‘B2’ or ‘B4’ indicating resistance to brittle fracture based on the results of the V-notch Charpy impact test. B2 and B4 a test should be made with Charpy V-notch specimens.035 percent .045 percent = 0. 5) Resistance to Brittle Fracture — Symbol ‘B’. and W1 = Weldable by resistance welding but not fusion weldable.IS : 1570 (Part I) . Steels B. taken in the direction of rolling with the notch perpendicular to the surface of the plate or product. B2 and B4 are characterized by an average V-notch Charpy impact value according to the following table: Steels Specified UTS Range                           Energy (4) J 40 28 40 28 40 28 40                         370 to 520 N/mm2 500 to 700 N/mm2 (1) B B0 B2 B4 Energy (2) J 28 28 28 28 Temperature (3) °C 27 0 – 20 – 40 Temperature (5) °C 27 – 10 0 – 30 – 20 – 50 – 40 9 = 0. B0.1978 Example: Maximum sulphur Maximum phosphorus Designation: SP 44 4) Weldability Guarantee — Guaranteed weldability of steel as determined by tests mutually agreed between the purchaser and the supplier shall be indicated by the following symbols: W = Fusion weldable. For steels B. Notes — If no symbol is used. 8) Surface Finish ( Applicable to Sheet Only ) — The following symbols shall be used to indicate the surface finish: F1 F2 F3 F4 F5 F6 F7 F8 F9 — General purpose finish. it shall mean that the surface is in as-rolled or as-forged condition. D2 — Deep drawing quality. F12 — Mirror finish. — Exposed. it shall mean that the steel is commercial quality. — Plating finish. — Matt finish. S2 — Descaled. 10 . and D3 — Extra deep drawing quality. F10 — Polished and coloured blue. S3 — Pickled (including washing and neutralizing). — Unpolished finish. — Polished finish. NOTE — If no symbol is used. 7) Formability ( Applicable to Sheet Only ) — The following symbols shall be used to indicate drawability: D1 — Drawing quality. — Unexposed. S4 — Shot. F11 — Polished and coloured yellow. — Bright finish. S5 — Peeled (skinned). — Full finish. grit or sand blasted.1978 6) Surface Condition — The following symbols shall be used to indicate surface condition: S1 — Deseamed or scarfed.IS : 1570 (Part I) . S6 — Bright drawn or cold-rolled. and S7 — Ground. only the room temperature properties shall be indicated in the designation. 11) Cryogenic Quality — For guarantee with regard to low temperature properties. 10) Elevated Temperature Properties — For guarantee with regard to elevated temperature properties. Solution-treated. and Hardened and tempered. Controlled rolled. and F14 — Direct annealed finish. Controlled cooled. it means that the steel is hot-rolled. Stress-relieved. the letter ‘L’ shall be used. However. Solution-treated and aged. if done. However. Patented. Case-hardened*. Bright annealed.IS : 1570 (Part I) . Normalized*. Annealed. 11 . NOTE — If no symbol is used. 9) Treatment — The following symbols shall be used to indicate the treatment given to the steel:* T1 T2 T3 T4 T5 T6 T7 T8 T9 T10 T11 T12 T13 T14 — — — — — — — — — — — — — — Shot-peened. Spherodized. Elevated temperature properties shall be intimated to the purchaser separately by the manufacturer.1978 F13 — Vitreous enamel finish. the letter ‘H’ shall be used. Hard-drawn. Examples: Fe 410 Cu K — Killed steel containing copper as alloying element with a minimum tensile strength of 410 N/mm2 FeE 300 P 35— Semi-killed steel with a minimum yield strength of 300 N/mm2 and degree of purity as follows: *Includes tempering. in the designation only the room temperature properties shall be shown. IS : 432 (Part I).035 Max Fe 470W — Steel with a minimum tensile strength of 470 N/mm2 and of guaranteed fusion welding quality FeE 550 S6 — Bright drawn or cold rolled steel with a minimum yield strength of 550 N/mm2 Fe 00R — Rimming quality steel with no guarantee of minimum tensile or yield strength FeE 590 F7 — Sheet steel of plating finish and minimum yield strength of 590 N/mm2 Fe 510 Ba — Steel in annealed condition with a minimum tensile strength of 510 N/mm2 and resistance to brittle fracture = B — Steel with guaranteed elevated temperature properties and a minimum room temperature tensile strength of 710 N/mm2 — Semi-killed non-ageing quality steel with S & P = 0. 1. IS : 226-1975 Title Specification for structural steel (standard quality) ( fifth revision ) 2.IS : 1570 (Part I) .Mild steel and medium tensile steel bars and 1966 hard drawn steel wire for concrete reinforcement : Part I Mild steel and medium tensile steel bars ( second revision ) 12 .055 and minimum tensile Max = 410 N/mm2 — Semi-killed steel in controlled rolled condition with a minimum tensile strength of 600 N/mm2 — Cryogenic quality steel with a minimum room temperature tensile strength of 520 N/mm2 Fe 710 H Fe 410 Q1 Fe 600 T4 Fe 520 L APPENDIX B LIST OF INDIAN STANDARDS REFERRED IN COLUMN 6 OF TABLE 1 Sl No.1978 S & P = 0. IS : 1570 (Part I) . IS : 961-1975 5. IS : 3039-1965 15.1978 3. IS : 5272-1969 . IS : 1148-1973 7. IS : 2100-1970 12. blooms and slabs for re-rolling into structural steel (standard quality) ( first revision ) Specification for carbon steel billets. IS : 1979-1971 10. pressure vessels and welded machinery structures Carbon steel sheets for integral coaches 13 13. blooms and slabs for re-rolling into structural steel (ordinary quality) ( first revision ) Specification for structural steel (shipbuilding quality) Specification for steel for marine boilers. IS : 1978-1971 9. IS : 1079-1973 6. IS : 3503-1966 16. IS : 2062-1969 11. IS : 1977-1975 8.Mild steel and medium tensile steel bars and 1966 hard drawn steel wire for concrete reinforcement : Part II Hard drawn steel wire ( second revision ) 4. bars and sections for boilers ( first revision ) Specification for carbon steel billets. IS : 432 ( Part II ). IS : 2830-1975 Specification for structural steel (high tensile) ( second revision ) Specification for hot rolled carbon steel sheet and strip ( third revision ) Specification for rivet bars up to 40 mm for structural purposes ( second revision ) Specification for structural steel (ordinary quality) ( second revision ) Specification for line pipe ( first revision ) Specification for high test line pipe ( first revision ) Specification for structural steel welding quality) ( first revision ) (fusion Specification for steel billets. IS : 2831-1975 14. IS : 6915-1973 20.IS : 1570 (Part I) . IS : 6914-1973 19.1978 17. IS : 5986-1970 Hot rolled steel plates and flats for cold forming and flanging operations for automobile and general purposes Carbon steel cast billet ingots for rolling into structural steel (standard quality) Carbon steel cast billet ingots for rolling into structural steel (ordinary quality) Specification for weldable structural steel (medium and high strength quality) 18. IS : 8500-1977 14 . BALARAMAMOORTHY ( Alternate ) Bihar Alloy Steels Ltd. R. K. Calcutta Heavy Engineering Corporation Ltd. K. Ranchi SHRI R. Bombay Mahindra Ugine Steel Co Ltd. CHATTERJEE SHRI M. Pathy is also alternate to Shri A. V. V. DAS ( Alternate ) SHRI A. C. Tiruchchirappalli DR G. JHA ( Alternate ) JOINT DIRECTOR (MET) RESEARCH Ministry of Railways DESIGNS & STANDARDS ORGANIZATION ASSISTANT DIRECTOR (MS) ( Alternate ) Bhabha Atomic Research Centre. SUBRAMANIAN Bharat Heavy Electricals Ltd. VENKATARAMAN *Dr R. K. Khopoli. Durgapur SHRI M. SEN ( Alternate ) Alloy Steels Plant. K.IS : 1570 (Part I) . KONDAL RAO SHRI K.1978 ( Continued from page 2 )* Members Representing Ministry of Defence (DGI) SHRI P. C. V. DUTTA SHRI R. Subramanian of Mahindra Ugine Steel Co Ltd. MOHAN Alloy Steels Producers Association of India. Khopoli SHRI A. PRAMANIK Iron & Steel Control. 15 . K. V. ROY Association of Indian Automobile Manufacturers. PRASAD SHRI D. Trombay DR N. Ranchi DR N. R. Bombay DR R. K. PATHY* SHRI M. No. 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 Catalogue’ and ‘Standards : Monthly Additions’. THIRUVANANTHAPURAM. if the review indicates that changes are needed. COIMBATORE. FARIDABAD. NALAGARH. Review of Indian Standards Amendments are issued to standards as the need arises on the basis of comments. BHUBANESHWAR. I. New Delhi 110002. BIS. This does not preclude the free use. NAGPUR. 1 Date of Issue January 1981 BUREAU OF INDIAN STANDARDS Headquarters: Manak Bhavan. P. T. 337 85 61   337 86 26. Amd. 832 78 58   832 78 91. 9 Bahadur Shah Zafar Marg NEW DELHI 110002 : 1/14 C. such as symbols and sizes. Andheri (East) MUMBAI 400093 BANGALORE. Campus. VISHAKHAPATNAM . 832 78 92 Northern : SCO 335-336. 1986 to promote harmonious development of the activities of standardization. Sector 34-A. a standard along with amendments is reaffirmed when such review indicates that no changes are needed. Copyright BIS has the copyright of all its publications. RAJKOT. 235 04 42   235 15 19. V. I. Scheme VII M. 323 94 02 Regional Offices: Central Eastern : Manak Bhavan. Standards are also reviewed periodically. Road. HYDERABAD. Enquiries relating to copyright be addressed to the Director (Publications). KANPUR. I. in the course of implementing the standard. IV Cross Road. of necessary details. GHAZIABAD. No part of these publications may be reproduced in any form without the prior permission in writing of BIS. PUNE. 337 91 20  60 38 43   60 20 25  235 02 16. 323 33 75. CHANDIGARH 160022 Southern : C. JAIPUR. marking and quality certification of goods and attending to connected matters in the country. type or grade designations. 235 23 15  832 92 95. LUCKNOW. E9 MIDC. Branches : AHMEDABAD. Marol. Telephones: 323 01 31. it is taken up for revision. CHENNAI 600113 Western : Manakalaya. T. Kankurgachi KOLKATA 700054 Telegrams: Manaksanstha (Common to all offices) Telephone  323 76 17   323 38 41  337 84 99. 9 Bahadur Shah Zafar Marg. This Indian Standard has been developed by Technical Committee : SMDC 19 Amendments Issued Since Publication Amend No. GUWAHATI.Bureau of Indian Standards BIS is a statutory institution established under the Bureau of Indian Standards Act. PATNA. BHOPAL.