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.
Abstract: The heat resisting alloy of the invention has a high resistance to oxidation, carburization and creep at very high temperatures; its composition is as follows (in % by weight):______________________________________ Ni 24 - 53 Cr 20 - 44 C 0.01 - 0.6 Mn 0.1 - 1.5 Si 1.3 - 3 Nb 0.5 - 3 N 0.05 - 0.2 (W + Mo) 0.2 - 5 Fe 0 - 47 Cu 0 - 5 ______________________________________The minimum copper content in case the alloy contains tungsten and less than 40% nickel is at least 0.1%; the Ni/Cr ratio is between 1.20 and 1.40.
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