Multicore 309 cored wires are manufactured with a range of flux contents. Although users will normally be using products with a nominal flux content of 3%. Multicore 309 cored wires are available in a variety of alloys conforming to J-STD-006 and EN 29453 or alloys conforming to similar national or international standards. For details refer to document “Properties of Alloys used in Cored Solder Wires ”. A wide range of wire diameters is available. Alternative flux contents and alloys may be manufactured to special order.