This is used inSG iron to increase carbon levels .Their Carbon pick up ranges from a minimum of 95% to a maximum of 99.9%. The Sulphur levels are even better as all their products have a maximum Sulphur range of 0.01%. This gives foundries the extra edge on their castings. The extremely low level Nitrogen avoids pin holes and high carbon pick up helps the foundries to make high quality castings smoothly