Home | americanflux WEBWe are the world's largest producer of ESR flux, a chemical refining agent used to produce high performance superalloys. Our molybdenum products are also used in superalloys, as well as for the coa We are the world's largest producer of ESR flux, a chemical refining agent used to produce high performance superalloys. Our molybdenum products are also used in superalloys, as well as for the coatings on automotive …