ISO INTERNATIONAL STANDARD 8050 First edition 1988-12-01 INTERNATIONAL ORGANIZATION FOR STANDARDIZATION SO ORGANISATION INTERNATIONALE DENORMALISATION ME>KAYHAPOAHAAOPTAHM3ALMANOCTAHAAPTW3ALMM Ferronickel ingots or pieces -- Sampling for analysis Ferro-nickel en lingots ou en morceaux - Echantillonnage pour analyse Referencenumber ISO 8050:1988 (E) ISO8050 :1988 (F) Foreword ISo (the International Organization for Standardization) is a worldwide federation of national standards bodies (Iso member bodies). The work of preparing International Standards is normally carried out through Iso technical committees. Each member body interested in a subject for which a technical committee has been established has the right to be represented on that committee. International organizations, govern- mental and non-governmental, in liaison with ISo, also take part in the work. ISO collaborates closely with the international Electrotechnical Commission (IEC) on all matters of electrotechnical standardization. Draft International Standards adopted by the technical committees are circulated to the member bodies for approval before their acceptance as International Standards by the ISo Council. They are approved in accordance with Iso procedures requiring at least 75 % approval by the member bodies voting. International Standard ISO 8050 was prepared by Technical Committee ISO/TC 155, Nickelandnickelalloys Annex A forms an integral part of this International Standard. Annexes B, C and D are for information only. International Organization for Standardization, 1988 Printed in Switzerland INTERNATIONALSTANDARD ISO 8050 :1988 (E) Ferronickel ingots or pieces - Sampling for analysis 1Scope 3 Sampling of each heat at the producer's plant This International Standard specifies a method for sampling of ferronickel lots in ingot or piece form with a view to obtaining a 3.1 Taking the primary sample during casting representativelaboratorysampleforthedeterminationofthe chemicalcompositionofthelot. 3.1.1 Each increment2) shall be taken using a spoon and cast As agreed between the purchaser and the supplier, a choice is inamouldto obtainasuitablesmallingotforchemical or tobemadebetweentwoprocedures: physical analysis.Theusual geometryof such ingots isthatofa frustum. Itis desirable thatthedimensions liewithinthefollow- The first procedure can be applied at the producer's ing limits: plant during casting (description in clauses 3 and 5). height: 100 to 140 mm The second procedure canbe applied to lots as upper diameter: 35 to 50 mm delivered at the buyer's premises1) (description in clauses 4 and 5). It includes two alternatives for sample taking (drill- lower diameter: 30 to 40 mm ing and milling). The ingot mould shall be made of material that allows the Each party is entitled to participate in (or be represented at) sample to cool rapidly; a large block of copper would meet samplingoperations. this requirement. If necessary, the sample shall be killed to obtain a smallingot of Normative references sound metal (free of cracks and blowholes). Killing is most 2 often done with aluminium, in wire or chip form, at 1 to 2 g of aluminium per kilogram. Thefollowingstandardscontainprovisions which,through reference in this text, constitute provisions of this International The large height of the small ingots permits small shrinkholes to Standard. At the time of publication, the editions indicated be confined to the upper part, thus ensuring that the lower part were valid. All standards are subject to revision, and parties to of the ingot is perfectly sound and homogenous and hence agreements based on this International Standard are encour suitable for analysis. Generally, a height of 120 mm will aged to investigate the possibility of applying the most recent guarantee that the sound portion extends at least 70 mm up editionsofthestandardslistedbelow.MembersofIEC andISO from the base. maintain registers of currently valid International Standards. IS0513:1975,Applic