In order to estimate the feasibility to Electromagnetic Casting(EMC)to
different metals, the mathematical model of the Electromagnetic
Dimensionless Number (EMDN) and its expression have been presented. By the theoretical analysis of the EMDN, it can be concluded that the distinct feasibility of EMC to
different metals under the given experimental parameters
results from the different physical properties. By discussion of the EMDN application in copper, aluminum, steel and Sn-3%Pb alloy, it can be noticed that:1) copper, steel and Sn-3%Pb require a higher magnetic intensity than aluminum does to attain EMC; 2) copper, steel and Sn-3%Pb need an approximately equal magnetic intensity about 0.08T~0.1T to achieve EMC and aluminum only needs 0.04T. Experiments were carried out by use of Sn-3%Pb alloy and aluminum and the experimental results agree well with the calculated results, and the veracity of the EMDN has been proved then.Theoretical equation of the EMDN model and the prerequisite to attaining the EMC of a metal is given as follows: ? 2 πfσμ ?t ? 2 B0 ? (1 ? e? )2 > 10 t ≤ δ 2 3 ξ = ?? ρ gt πfσμ ? 2 ?? 2 B0 (1 ? 1/ e)2 ρ g μ t > 10 t > δ