A copper-base alloy with increased melting point above 1000.degree. C., which is resistant or immune to carburization, metal dusting and coking, resistant to oxidation at elevated temperatures. The alloy has the following composition (in weight-%): Al 4 15, Si 0.1 6, Mo 0.5 40, W 0 40, where the total of Mo and W do not exceed 40%, one or more of the group of Rare Earth Metals (REM), such as yttrium, hafnium, zirconium, lanthanum and/or cerium, up to 1.0 weight-% of each element or a total of maximum 3.0 weight-%, Cu balance and normally occurring alloying additions and impurities. A method for the alloy's production, and the alloy's use as construction components in CO-containing atmospheres, ammonia containing atmospheres, and/or hydrocarbon containing atmospheres or solid carbon containing processes, are also disclosed.

 
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