Sulphur

Chemical Formula	Available Form	Description of the Product
S – 98%	Dia = 9, 13mm Cored Wire, Powder	It is used as an alloying addition to improve machinability. Increasing the sulfur content from a nominal, say 0.008% to 0.060% lowers the Charpy upper shelf level, thereby raising the transition temperature as fixed by a given impact energy. Steel that must be machined may contain sulfur to break up chips and reduce tool wear. Cheapest free machining addition agent in steel.