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Studies on temperature distribution during welding are very important because this may pave the way for application of microstructure modeling, thermal stress analysis, residual stress/distribution and welding process simulation. An attempt has been made in this paper to predict of temperature variation of entire plates during welding and after welding through an analytical solution is derived from the transient multi dimensional heat conduction of infinite plate to finite thickness. The heat input that is applied on the plate is exactly same amount of heat lost for electric arc is assumed to be a moving double central conicoidal heat source with Gaussian distribution for Submerged Arc Welding process. The prediction was compared with experimental results with generally good agreement.