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The influence of reactivity of different sheath metals such as Ag, Fe, Cu, Ni and SS on the superconducting properties of NdFeAsO sub(0.6)F sub(0.4) wires has been investigated. The observed structural and superconducting properties of the metal sheathed wires conclude that among the five candidates Ag and Fe are technically compatible to be used as sheath materials in terms of reactivity. However, the best superconducting properties such as T sub()Cand transport J sub()Cwere exhibited by Ag sheathed NdFeAsO sub(0.6)F sub(0.4) wires.