Abstract: A method of connecting a manganese steel part to another carbon steel part including the steps of depositing an austeno-ferritic stainless steel at the end of a carbon steel part and welding the latter provided at its end with the deposit to a manganese steel part, the method being applicable to assembling a rail to a common crossing railway track part.

Abstract: An insert for connecting a part made from a steel containing 12-14% by weight of manganese to at least one carbon steel part, said insert being made from an austenitic-ferritic alloy having the following chemical composition (in % by weight):______________________________________ Carbon 0.025-0.035% Manganese 6-11% Silicon 0.5-1.5% Nickel 5-8% Chromium 17.5-20% Molybdenum <0.5% Nitrogen 0.12-0.20% Phosphorus and sulfur .ltoreq.0.030% ______________________________________and the delta ferrite content of which (in percent by volume) as measured by micrographic counting ranges between about 5% and 15%.

Abstract: The invention alloy has the following by-weight composition:______________________________________ carbon 0.05 to 0.60% nickel 20 to 55% chromium 15 to 40% silicon 0.5 to 2% manganese 0.5 to 2% nitrogen 0.03 to 0.20% niobium 0 to 2% tungsten and/or molybdenum 0 to 5% aluminium 2 to 8% copper 0 to 5% iron and usual impurities in as small quantities as the balance possible ______________________________________an increased resistance to carburization is obtained by endogenous formation of a barrier opposing the penetration of aluminium.