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• In Gray Iron, The combination of Calcium and Barium in 73% FeSi-Ca+Ba with Barium from 2-3% provides a potent nucleating effect with about 40% less needed to obtain equivalent chill depths produced by the use of standard inoculating grade Ferro Silicons. • This combination of Ca and Ba has the greatest effect on improvement of mechanical properties. The combination of Calcium and Barium minimizes undercooling and promotes eutectic solidification with Type A graphite and a pearlitic matrix. The alloy is based on 70-73% ferrosilicon, & its reaction with liquid is exothermic, ensuring excellent dissolution and consistency of results• In Ductile Iron, Alloys containing over 70% silicon have long been the favored inoculation material for ductile iron. In special carbide prone work, it is reported by many foundries that increased nucleation and elimination of chill because of the more potent effect of Calcium plus Barium. It is experienced on shop floor the Calcium plus Barium alloy produced nodule counts 18% higher. Therefore FeSi-Ca+Ba can be used in all grades of ductile iron. |
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