Magnesium residual content

Magnesium content in the casting which is preserved as a residue after treatment and the associated bonding of the sulfur. Determination of an optimum magnesium residual content for the existing product mix is a very important task that also serves for quality assurance. The following factors have to be taken into account in this context:

  • Time between the treatment and the last casting process
  • Number of recasting operations
  • The lowest magnesium content required for the last casting
  • Fading characteristic of the magnesium in the melt which has to be determined specifically for each foundry
  • Sulfur content of the melt after treatment

The residual magnesium content should generally be between 0.035 and 0.055%.

Additional references:
Nodular graphite cast iron
Magnesium fading
Magnesium yield
Fading effect