A copper base alloy, which is resistant or immune to carburization, metal dusting and coking, and resistant to oxidation, the alloy having the following composition (all contents in weight %):

• Al 0-15
• Si 0-6
• Mg 0-6
• one or more of the group of Rare Earth Metal (REM), yttrium, hafnium, zirconium, lanthanum, cerium) up to 0.3 wt. % each;
• Cu balance; and
• normally occurring alloying additions and impurities. Related articles of manufacture and methods are also described.