This specification covers four grades of ferrotitanium designated as A,B,C and D. The grades which are available in different sizes shall conform to the required chemical composition for titanium, carbon, silicon, and aluminum and for supplementary elements such as manganese, phosphorus, sulfur, chromium, nickel, molybdenum, copper, cobalt, vanadium, lead, arsenic, bismuth, tin, zinc, zirconium, boron, and nitrogen.