This standard applies to iron, blast furnace and sorted ores, manganese ore concentrates with a particle size of over 10 mm, sinter
GOST 15137-1977 Referenced Document
GOST 20784-1975 Manganese ore concentrates and agglomerates. Methods of sampling and sample preparation for mechanical strength determination
GOST 26136-1984 Iron ores, concentrates, agglomerates and pellets. Methods of sampling and preparation of samples for physical tests*, 1984-04-19 Update
GOST 15137-1977 history
1977GOST 15137-1977 Iron and manganese ores, agglomerates and pellets. Determination of tumbler strength