Storage and/or transport systems for liquefied gases

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A storage and/or transport system for a liquefied gas comprises a container (4, 6) which is intended to be in contact with the liquified gas, wherein the container consists substantially of metal sheets which are welded together in a fluid-tight manner, at least one metal sheet being an alloy based on iron/manganese comprising, by weight : 25.0% ≤ Mn ≤ 32.0%; 7.0% ≤ Cr ≤ 14.0%; 0 ≤ Ni ≤ 2.5%; 0.05% ≤ N ≤ 0.30%; 0.1 ≤ Si ≤ 0.5%; optionally 0.010% ≤ rare earth metals ≤ 0.14%; the remainder being iron and residual elements resulting from the processing operation.