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ISO 528:1983

Refractory products — Determination of pyrometric cone equivalent (refractoriness)

Dec 1, 1983

General information

90.60     Jun 5, 2025

ISO

ISO/TC 33

International Standard

81.080  

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Scope

The specified method is used for determining the pyrometric cone equivalent (refractoriness) of siliceous, low alumina fireclay and fireclay refractory materials and products. Its usefull range of application depends on the availability of suitable pyromeric reference cones. It may also be used for roughly determining the refractoriness of other refractory materials. The pyrometric cone equivalent of the test material is expressed by the number or numbers of the pyrometric reference cone or cones.

Life cycle

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PUBLISHED
ISO 528:1983
90.60 Close of review
Jun 5, 2025