1. Properties and Applications
Superalloys
Properties and Applications

2. Contents Classification of Superalloys Properties Applications
Application in Oil Gas sector
Turbine blades made up of nickel superalloy

3. Classification of Superalloys
These alloys have austenitic FCC structure which have base alloying element of nickel, cobalt and iron.
Further they are classified on the basis of pre-dominant element present in it.
Alloying elements are Fe, Co, Ni, Cr, W (tungsten),
Mo (molybdenum), Nb (niobium) and Ta (tantalum).
Iron based alloys:
9-38 % nickel
15-22 % chromium
32-67 % iron
Common type of Iron based alloy is Incoloy
series.

4. Cobalt based alloys:
Up to 35% nickel
19-30 % chromium
30-65 % cobalt
Cobalt based alloys can retain their strength at
high temperature but they are not as strong as
nickel based alloys.

5. Nickel based alloys:
38-76% nickel
Up to 27 % chromium
Up to 20 % cobalt.
Some of the common type of nickel based alloys
are Nimonic, Hastelloy and Inconel.
These are the most common types of
Superalloy which are widely used in turbine
blades

6. Properties of Superalloys
Excellent mechanical strength and wear resistance at high temperature.
Resistance to corrosion and oxidation at very high temperature.
Good surface stability.

7. Applications of Superalloys
In Aerospace : blades of turbines and in jet/rocket engines.
In Marine : wide use in Submarines.
In Chemical processing industries.
Heat exchanger tubing
Industrial gas turbines
Nuclear Reactors

8. Thank you 