5453 International Standard (ISO Ferroniobium - Specification and conditions of delivery Ferro-niobium-Spécificationset conditions delivraison First edition - 1980-12-01 ISO 5453-1980 (E) UDC 669.15293-198 Ref.No. ISO 5453-1980 (E) Descriptors : ferroalloys, specifications, delivery conditions, chemical composition. Price based on 3 pages CoDvriaht I Foreword Iso (the International Organization for Standardization) is a worldwide federation of national standards institutes (Iso member bodies). The work of developing Inter- national Standards is carried out through Iso technical committees. Every member body interested in a subject for which a technical committee has been set up has the and non-governmental, in liaison with Iso, also take part in the work. Draft International Standards adopted by the technical committees are circulated to the member bodies for approval before their acceptance as International Standards by theisoCouncil. International StandardISO5453wasdevelopedbyTechnical CommitteeISO/TC132, Ferroalloys,andwascirculatedtothememberbodiesinNovember1979. It has been approved by the member bodies of the following countries : Australia Germany, F.R. Romania Austria India South Africa, Rep. of Brazil Italy Sweden Canada Japan UnitedKingdom China Norway USA Czechoslovakia Poland USSR France Portugal Yugoslavia No member body expressed disapproval of the document. @International Organization for Standardization, 1980 Printed in Switzerland INTERNATIONALSTANDARD ISO5453-1980 (E) Ferroniobium - Specification and conditions of delivery 1 Scope and field of application 5 Requirements This International Standard specifies requirements and con- 5.1 Constitution of consignment ditions of delivery for ferroniobium usually supplied for steel- making and foundry use. Ferroniobiumshall bedeliveredinconsignmentsconstitutedby one of the following methods. 2 References 5.1.1 Tapped lot method ISo565,Test sieves --Wovenmetalwire cloth andperforated A consignment constituted by the tapped lot method consists plate - Nominal sizes of apertures. of a ferroniobium mass of one melt (or onc part of a continuous tap). ISo3713,Ferroalloys -Sampling andpreparation of samples - General rules. 1) 5.1.2 Graded lot method Aconsignmentconstitutedbythegradedlotmethod consists 3 Definition of a number of melts (or parts of continuous taps) of one ferroniobium designation. 3.1 ferroniobium : A master alloy of iron and niobium with a minimum niobium content of 55,0 % by mass, and a max- Theniobium contentof themelts (orpartsofcontinuoustaps) imum niobium content of 70,0 % by mass, obtained by reduc- constituting the consignment shall not differ from each other tion. by more than 3 % absolute. 5.1.3Blended lotmethod 4· Information for ordering A consignment constituted by the blended lot method consists Orders for ferroniobium shallinclude the following information. of a number of melts (or parts of continuous taps) of one ferroniobium designation, which have been crushed to a parti- a) Quantity. cle size less than 50 mm and thoroughly mixed. b) Constitution of consignment. The content of the main constituent of the melts (or parts of continuoustaps)constitutingtheconsignmentmay vary c Chemical composition in accordance with the designa- between the minimum and maximum limits specified for the tions given in table 1. appropriate ferroniobium designation. d) Particle size ranges in accordance with the classes 5.2 Chemical composition given in table 2. 5.2.1 The chemical composition of ferroniobium shall be as e) Necessary requirements for analysis reports, packing, specified in table 1.The limits stated correspond to particle size etc., as appropriate. ranges in classes 1 to 4 in accordance with table 2. 1) At present at the stage of draft. 1