BS ISO 556:2020

What is ISO 556 about?  

ISO 556 specifies a method for the determination of the mechanical strength of coke having a particle size greater than 20 mm. 

ISO 556 specifies test procedure and test results of Micum indices and  Irsid indices on coke. 

Who is ISO 556 for?  

ISO 556 on the determination of mechanical strength of coke is beneficial for  

• Coke testing laboratories  
• Chemical engineers  
• Mineral metallurgists   
• Steel industry 

Why should you use ISO 556?  

Micum indices and  Irsid indices are done to determine the strength and impact resistance of coke by mechanical action. 

ISO 556 provides information on sample preparation, test procedure, calculation, micum indices, irsid indices required to determine the mechanical strength of coke. 

As a user of ISO 556, you can be ensured of the mechanical strength of the coke. 

Information provided on Micum indices and  Irsid indices by ISO 556 assist the user in determining the mechanical strength of coke. ISO 556 helps the user in improving the quality of coke which also helps the steel industries in manufacturing high-quality steel. 

What’s changed since the last update?  

BS ISO 556:2020 supersedes ISO 556:1980, which has been withdrawn. 

The main changes compared to the previous edition are as follows: 

• The sample of coke used for Micum and Irsid tests may be analyzed with a bottom size greater than 20 mm (e.g. 40 mm or 60 mm) and should the starting bottom size of coke used to be different from 20 mm, it is to be stated in the test report. 
• Addition of a new set of tables specifying: Sample, test conditions and results for Micum and Irsid tests, dimensions of the cylindrical steel drum for Micum and Irsid tests, Suitable set of sieves. 
•  In reporting coke Micum and/or Irsid results, it is required to specify if a single determination or a duplicate determination was made and if a full or half Micum drum was used.