NIMONIC® Alloy PK33

A nickel-chromium-cobalt alloy that is precipitation hardenable and also contains a relatively high (7%) level of molybdenum for solid-solution strengthening. It has an exceptional combination of high-temperature strength, creep resistance, and ductility when welded. The alloy is especially suitable for welded sheet structures. Used in gas turbines for flame tubes and other components.

Limiting
Ni Balance    
Cr 16.00 - 20.00 %
Co 12.00 - 16.00 %
Mo 5.00 - 9.00 %
Ti 1.50 - 3.00 %
Al 1.70 - 2.50 %
Fe max. 1.00 %
Mn max. 0.50 %
Si max. 0.50 %
Cu max. 0.20 %
Zr max. 0.06 %
S max. 0.015 %
B max. 0.005 %
Density
g/cm³   8.21
lb/in³   0.297