Nickel Alloy PK33/ Nimonic PK33

Technical Data Sheet

Chemical Composition Limits
Weight% Ni Cr Mo Fe Al Ti C
PK33 Bal 16-20 5-9 1.0 max 1.7-2.5 1.5-3.0 0.07 max
Weight% Cu Si Mn Co B Zr S
PK33 0.2 max 0.5 max 0.5 max 12.0-16.0 0.005 max 0.06 max 0.015 max

Alloy PK33 is a nickel- chromium - cobalt precipitation hardenable alloy but the addition of Molybdenum makes Alloy PK33 solid-solution strengthened. PK33 is commonly used in gas turbines as flame tubes because of its high temperature strength, creep resistance and welded sheet structures.

Typical Mechanical Properties

Material Condition 20°C 0.1 % Proof Stress MPa Tensile Strength MPa Elongation % Reduction of Area %
PK33 Bar Heat Treatment 2h/1100°C/AC +4h 850°C/AC 664 1127 33 41

PK33 is available in Sheet, Plate, Round Bar, Flat Bar, Forging Stock, Extruded Section and Welding Wire. For all stock availability contact Sales.


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Every effort is made to ensure that technical specifications are accurate. However, technical specifications included herein should be used as a guideline only. All specifications are subject to change without notice.

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