IS 1470: 2013 Hkkjrh; ekud flfydksseSaxuhT-k fof'kf"V — ¼ pkSFkk iqujh{k.k ½ Indian Standard SILICOMANGANESE — SPECIFICATION ( Fourth Revision ) ICS 77.100 © BIS 2013 B U R E A U O F I N D I A N S T A N D A R D S MANAK BHAVAN, 9 BAHADUR SHAH ZAFAR MARG NEW DELHI 110002 April 2013 Price Group 1 Ferro Alloys Sectional Committee, MTD 5 FOREWORD This Indian Standard (Fourth Revision) was adopted by the Bureau of Indian Standards, after the draft finalized by the Ferro Alloys Sectional Committee had been approved by the Metallurgical Engineering Division Council. This standard was first published in 1960 and subsequently revised in 1969, 1979 and 1990. In the light of the experience gained during the years it has been felt necessary to revise this standard. The following main modifications have been made in this revision: a) Two new grades Si23Mn68LS and Si26Mn60LP have been incorporated in view of the international trade practices and the present need of the industry. b) Particle size ranges have been modified. c) Informations to be given while ordering the material have been incorporated for the benefit of the purchaser. d) New clauses have been incorporated to avoid wide segregation of the chemical constituents, thereby safeguarding the small consumers of this product. 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 accordance with IS2:1960 ‘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 1470 : 2013 Indian Standard SILICOMANGANESE — SPECIFICATION ( Fourth Revision ) 1 SCOPE 3.3.2 Graded Lot Method — A consignment constituted by the graded lot method consists of a This standard covers the requirements and condition number of melts (or parts of continuous taps) of one of delivery for silicomanganese used by iron and steel silicomanganese designation. industry and foundries. The silicomanganese content of the melts (or parts of 2 REFERENCES continuous taps) constituting the consignment shall not differ from each other by more than 3 percent. The following standards contain provisions which through reference in the text, constitute provisions of 3.3.3 Blended Lot Method—A consignment constituted this standard. At the time of publication, the editions by the blended lot method consists of a number of melts indicated were valid. All standards are subject to (or parts of continuous taps) of one silicomanganese revision and parties to agreement based on this designation, which have been crushed to a particle size standard are encouraged to investigate the possibility less than 50 mm and thoroughly mixed. of applying the most recent editions of the standards The content of the main constituent of the melts (or indicated below: part of continuous taps) constituting the consignment IS No. Title may vary between the minimum and maximum limits specified for the appropriate silicomanganese 1387 : 1993 General requirements for the supply designation. of metallurgical materials (second revision) 4 GRADES 1472 : 1977 Methods of sampling ferro alloys for determination of chemical This standard covers 8 grades of silicomanganese, as composition ( first revision) specified in Table 1. 1559 : 1961 Methods of chemical analysis of 5 PARTICULARS TO BE SPECIFIED WHILE ferro alloys ORDERING 3 TERMINOLOGY For the benefit of the purchaser, particulars to be specified while ordering for the material to this For the purpose of this standard, the following specification shall be as follows: definitions shall apply. a) Quantity of the material; 3.1 Silicomanganese — A master alloy of iron, b) Constitution of consignment; manganese and silicon with a minimum manganese content in the range of 50-75 percent by mass and c) Name of the material; silicon content in the range of 10-35 percent by mass, d) Grade designation; obtained by reduction. e) Size range; and 3.2 Cast (Melt) — The product of any of the f) Necessary requirements for analysis reports, following: packing, etc, as appropriate. a) One furnace heat; or 6 SUPPLY OF MATERIALS b) One tap of continuous furnace; or General requirements relating to the supply of the c) A number of furnace or crucible heats of material to this standard shall be as laid down in similar composition mixed in a ladle or IS1387. holding furnace and used for making a cast. 7 REQUIREMENTS 3.3 Constitution of Consignment 7.1 Constitution of Consignment 3.3.1 Tapped Lot Method — A consignment constituted by the tapped lot method consists of silicomanganese Silicomanganese shall be delivered in consignments mass of one melt (or one part of a continuous tap) . constituted by one of the methods defined in 3.3. 1 IS 1470 : 2013 7.2 Chemical Composition 8 SIZE DESIGNATION 7.2.1 Each batch of the material shall conform to The material shall be supplied in lumps of as crushed the requirements of the chemical composition and screened particles in size designations 1 to 3. The specified in Table 1 and if so specified by the particle size ranges and tolerances shall be as given in purchaser at the time of enquiry and order, the Table 2. The undersize values shall be valid at the point manufacturer shall supply a test certificate of of delivery to the purchaser. chemical analysis for each melt. 9 EXTRANEOUS CONTAMINATIONS Table 1 Chemical Composition of Silicomanganese (Clauses 4, 7.2.1, 7.2.2 and 7.2.3) The material shall be reasonably free from extraneous contaminations like slag and non-metallic inclusions, Sl Grade Constituents, Percent1) No. Designation etc. Mn Si C P S Max Max Max 10 SAMPLING (1) (2) (3) (4) (5) (6) (7) Each batch of the material shall be sampled in i) Sil8Mn72 70-74 16-20 1.5 0.20 0.03 accordance with IS 1472. ii) Si23Mn68LS 65-70 20-25 1.0 0.30 0.03 iii) Si23Mn68 65-70 20-25 1.5 0.30 0.05 11 PACKING iv) Si18Mn68 65-70 16-20 2.0 0.30 0.02 v) Si19Mn63 60-65 17-20 2.0 0.30 0.03 The material shall be packed in suitable containers, in vi) Si16Mn63 60- 65 15-17 2.5 0.30 0.03 vii) Si26Mn60LP 60 Min 26 Min 0.2 0.05 0.03 quantities as mutually agreed to between the purchaser viii) Si26Mn53 50-55 24-28 0.1 0 30 0.03 and the supplier. 1) Except where ranges specified. 12 MARKING 7.2.2 If specified by the purchaser at the time of enquiry and order that each lump of the batch should conform 12.1 The material shall be marked with the following: to the chemical composition specified in Table 1, this a) Indication of the source of manufacture; shall be as agreed to between the purchaser and the b) Grade designation, cast or lot and size manufacturer. designation; NOTE — The material belonging to a melt which is out of c) Quantity; specification shall not be blended or mixed with the material of another cast/melt. d) Date of manufacture; and 7.2.3 The chemical composition given in Table 1 shows e) Shelf life, if required. only the main constituent elements and usual impurities. 12.2 BIS Certification Marking If the purchaser requires closer ranges for the main element contents and different limits for specified The material may also be marked with the Standard elements and/or non-specified elements, this shall be Mark. agreed to between the purchaser and the manufacturer. 12.2.1 The use of the Standard Mark is governed by 7.2.4 The chemical composition of the material shall be the provisions of Bureau of Indian Standards Act, 1986 determined either by the method specified in IS 1559 or and the Rules and Regulations made thereunder. The any other established instrumental/chemical method. details of conditions under which the licence for the In case of dispute the procedure given in IS1559 shall use of the Standard Mark may be granted to be the referee method. However, where the method is manufacturers or producers may be obtained from the not given in IS 1559, the referee method shall be agreed Bureau of Indian Standards. to between the purchaser and the manufacturer. Table 2 Particle Size Range (Clause 8) Sl No. Class Particle Size Range Undersize, Max, Percent by Mass Oversize, Max, Percent by mm Mass Total Below 3.15 mm (1) (2) (3) (4) (5) (6) i) 1 100-315 15 51) 10 No of piece to exceed ii) 2 25-200 15 71) 1.15 × the maximum iii) 3 10-100 15 71) limit of the size range iv) 4 3.15-50 7 specified in two or three v) 5 3.15-25 7 directions vi) 6 Up to 3.15 — 1) If not otherwise specified, these values are for information on ly. 2 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 goods 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; 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 amendments or edition by referring to the latest issue of ‘BIS Catalogue’ and ‘Standards: Monthly Additions’. This Indian Standard has been developed from Doc No.: MTD 5 (4803). 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