IN738

IN738 is a nickel base precipitation hardening equiaxed grain casting superalloy. It is one of the alloys with the best thermal corrosion resistance. The service temperature is less than 900 ℃. The alloy contains high chromium, tantalum and niobium.

Equivalent Grades

Trademark	GB	GOST	ASTM	UNS	DIN	W.Nr.	NF	BS	JIS	SS
–	K438	–	IN738	–	–	–	–	–	–	–

Chemical Composition, %

Alloy

IN738

0.1-0.2

≤0.3

≤0.2

≤0.015

15.7-16.3

Bal

8.0-9.0

2.4-2.8

1.5-2.0

3.2-3.7

3.0-3.5

0.6-1.1

1.5-2.0

0.005-0.015

0.05-0.15

≤0.5

Typical Physical and Mechanical Properties (RT, Solution Annealed)

Density, g/cm³	Melting Point, ℃	Tensile Strength, MPa	Yield Strength, MPa	ELongation, %	Hardness, HRB
8.16	1260-1330	1030	880	8	/

Available Products and Specifications

Rod, Bar, Wire and Forgings	–
Plate, Sheet and Strip	–
Pipe and Tube	–
Welding Product	–
Others	–

Features

The alloy has excellent thermal corrosion resistance, medium high temperature strength and good structural stability.

Applications

Alloys have been widely used in long-life turbine blades and guide vanes of ships and ground industrial gas turbines, as well as turbine parts and corrosion-resistant parts of aeroengines.