Cancels and replaces the second edition (1981). Specifies a method of determining the characteristic fusion temperatures of ash from solid mineral fuels.
ISO 540:1995 history
2008ISO 540:2008 Hard coal and coke - Determination of ash fusibility
1995ISO 540:1995 Solid mineral fuels - Determination of fusibility of ash - High-temperature tube method
1981ISO 540:1981 Solid mineral fuels; Determination of fusibility of ash; High-temperature tube method
1974ISO 540:1974 Title missing - Legacy paper document