Graphite carbon
From :CS Ceramic Co.,Ltd

Graphite carbon is spherical, namely spheroid graphite cast iron. Such can be included in the form that the carbon directly influences the performance of iron and steel. sulfur usually exist in steel and iron mainly in form of Mns and Fes, only with few other sulfide, such as Cr2S3, VS, TiS, NbS, and ZnS, and there is quite few of sulfur in free state. sulfur is steel and iron, usually it is hard to be dissolved in acids to produce sulfate in oxidizing acids and the hydrogen sulfide in non-oxidizing acids.