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.

Non-binding information

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