British Standards Document
BS ISO 540
Hard coal. Determination of ash fusibility

https://doi.org/10.3403/30474207U

BS ISO 540 is maintained by W/-. The current release of this standard is:

BS ISO 540:2025 Hard coal. Determination of ash fusibility

https://doi.org/10.3403/30474207 (published 12/08/2025)

This standard is available from the following sources:

Other historical versions of this standard document also exist:

BS ISO 540:2008 [current until 12/08/2025]