This part of ISO 7989 specifies the requirements for the coating mass per unit area, for other properties and also for testing of non-ferrous metallic coatings on steel wire products, of circular or other cross-section. This part of ISO 7989 deals with general application requirements, and is of use for those coatings for which no particular requirements have been laid down in ISO 7989-2. Deviations are possible, particularly if required for well-defined products. In such cases, appropriate requirements are part of the relevant product standard.