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Laboratory tests and inverse methods are used for the determination of the thermophysical properties of a CuCrZr alloy. The solidification path (temperature versus solid fraction curve) is determined using the Single Pan Thermal Analysis (SPTA) technique developed at LSMX. The temperature dependent thermal conductivity is identified by inverse analysis using temperature measurements in one dimensional solidified casting. The thermophysical properties will be used as input data in numerical models of the laboratory test aiming at evaluating the hot cracking sensitivity of copper based alloy in electron beam welding for the International Thermonuclear Experimental Reactor (ITER) project.