5450 International Standard (ISO INTERNATIONALORGANIZATION FOR STANDARDIZATION MEKAYHAPOAHAR OPFAHW3AUMA HO CTAHAAPTW3AUMWORGANISATION INTE RNATIONALE DE NORMALISATION Ferrotungsten - Specification and conditions of delivery Ferro-tungstene-Spécificationsetconditionsdelivraison First edition - 1980-12-01 ISO 5450-1980 (E) UDC669.15'27-198 Ref.No.1SO5450-1980(E) Descriptors :ferroalloys, ferrotungsten, specifications, delivery conditions, chemical composition. Price based on 3 pages 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 right to be represented on that'committee. International organizations, governmental 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 theISo Council. International Standard ISO 5450 was developed by Technical Committee ISO/TC 132, Ferroalloys, and was circulated to the member bodies in November 1979. 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 disapprovai of the document. InternationalOrganizationforStandardization,1980 Printed in Switzerland ISO5450-1980(E) INTERNATIONALSTANDARD Ferrotungsten - 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 ferrotungsten usually supplied for steelmaking and foundry use. Ferrotungsten shall be delivered in consignments constituted byoneof thefollowing methods. 2 References 5.1.1 Tapped lot method ISo565,Testsieves-Wovenmetalwireclothandperforated A consignment constituted by the tapped lot method consists plate -Nominal sizes of apertures. of a ferrotungsten mass of one melt (or one part of a con- Iso 3713,Ferroalloys -Sampling and preparation of samples tinuous tap). General rules.1) 5.1.2 Graded lot method Definition A consignment constituted by the graded lot method consists 3 of a number of melts (or parts of continuous taps) of one 3.1 ferrotungsten : A master alloy of iron and tungsten with ferrotungstendesignation. a minimumtungstencontent of 70,0%bymass,anda The tungsten content of themelts (or parts of continuous taps) maximum tungsten content of 85,0 % by mass, obtained by constituting the consignment shall not differ from each other reduction. by more than 3 % absolute. 4 Information for ordering 5.1.3Blended lot method A consignment constituted by the blended lot method.consists Orders for ferrotungsten shall include the following informa- ofanumberofmelts(orpartsof continuoustaps)ofone tion. ferrotungsten designation, which have been crushed to a parti- a) Quantity. clesizelessthan50mmandthoroughlymixed. The content of the main constituent of the melts (or parts of b) Constitution of consignment. continuoustaps)constitutingtheconsignmentmayvary Chemical composition in accordance with the designa between the minimum and maximum limits specified for the c) tions given in table 1. appropriate ferrotungsten designation. d) Particle size ranges in accordance with the classes 5.2 Chemical composition given intable2. 5.2.1 The chemical composition of ferrotungsten shall beas e) Necessary requirements for analysis reports, packing specified in table 1. The limits stated correspond to particle size etc.,asappropriate. ranges in classes 1 to 4 in accordance with table 2. 1) At present at the stage of dra