PURPOSE: To improve the wear resistance and strength of a heat resistant Co- Cr-Fe-C alloy at high temp. while maintaining the corrosion resistance at high temp. by dispersing a specified percentage of the carbide, nitride or carbonitride of a group IVa, Va or VIa metal in the periodic table in the alloy having a specified composition.

CONSTITUTION: The titled sintered alloy consists of 3W30wt% hard dispersed phase of carbides, nitrides or carbonitrides of one or more kinds of metals selected from the group IVa, Va and VIa metals in the periodic table ro two or more kinds of such compounds and 97W70wt% binding phase of a Co alloy consisting of 20W40% Cr, 10W30% Fe, 0.2W3.0% C and the balance Co. The alloy has higher wear resistance in a hot corrosive atmosphere and higher strength at high temp. than a heat resistant Co alloy manufactured by conventional melting and casting or a sintered alloy having a composition which is different from said composition in the amount of each component.