Udimet 720

Udimet 720 is a nickel base alloy, solid solution strengthened with tungsten and molybdenum and precipitation-hardened with titanium and aluminum. The alloy combines high strength with metallurgical stability as demonstrated by excellent impact strength retention after long exposures at elevated temperatures. Good oxidation and corrosion resistance combined with high strength make the alloy useful in gas turbine blade and disc applications.

Equivalent Grades

Trademark	GB	GOST	ASTM	UNS	DIN	W.Nr.	NF	BS	JIS	SS
Udimet 720	–	GH4720Li	Udimet 720	–	NiCr18Co15TiMoAl	–	–	–	–	–

Chemical Composition, %

Alloy

Udimet 720

0.01-0.02

≤0.20

≤0.15

≤0.015

15.5-16.5

Bal

14.0-15.5

1.0-1.5

2.75-3.25

2.25-2.75

4.75-5.25

0.025-0.050

0.01-0.02

≤0.05

Typical Physical and Mechanical Properties (RT, Solution Annealed + Aged)

Density, g/cm3	Melting Point, ℃	Tensile Strength, MPa	Yield Strength, MPa	ELongation, %	Hardness, HRB
8.14	1194-1338	1620	1166	11	/

Available Products and Specifications

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

Features

The alloy has high high temperature strength, fatigue resistance and creep resistance; It has good sulfur corrosion resistance, oxidation resistance and long-term structural stability

Applications

The alloy has been used to make aeroengine turbine disk and passed the test. It can also be used to make the integral turbine rotor of a new generation of strategic missiles and high thrust rocket engines, as well as the turbine disk of ground gas turbine working below 750 degrees for a long time. The alloy has been used to make aeroengine turbine disk and passed the test. It can also be used to make the integral turbine rotor of a new generation of strategic missiles and high thrust rocket engines, as well as the turbine disk of ground gas turbine working below 750 degrees for a long time.