Sets out a method for the preparation of a test specimen of a refractory material and the determination of its pyrometric cone equivalent (refractoriness). This Standard is identical with and has been reproduced from ISO 528:1983.RECONFIRMATION NOTICETechnical Committee MN-007 has reviewed the content of this publication and in accordance with Standards Australia procedures for reconfirmation, it has been determined that the publication is still valid and does not require change.Certain documents referenced in the publication may have been amended since the original date of publication. Users are advised to ensure that they are using the latest versions of such documents as appropriate, unless advised otherwise in this Reconfirmation Notice.Approved for reconfirmation in accordance with Standards Australia procedures for reconfirmation on 4 April 2013.The following are represented on Technical Committee MN-007:Australasian Institute of Mining and MetallurgyAustralian Ceramic SocietyBureau of Steel Manufacturers of AustraliaCement Industry FederationCSIRO Manufacturing