Alloy IN 6201 satisfies the requirement for an alloy as strong as IN 792 with the corrosion resistance of IN 939, for investment cast blades in advanced industrial and marine gas turbines. Alloy IN 6203 was developed to optimise the combination of creep rupture strength and hot corrosion resistance available in directionally solidified blades for marine gas turbines. Following an outline of the basis for selecting the compositions of these alloys, data are provided on foundry characteristics, mechanical properties, corrosion resistance, alloy stability, and the result of trial casting of blades in IN 6201.
MST/904
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