Inconel X-750 (UNS N07750 / W.Nr. 2.4669)

Inconel X-750 (UNS N07750 / W.Nr. 2.4669) is a nickel-chromium alloy similar to Inconel 600 but made precipitation hardenable by additions of aluminum and titanium. It has good resistance to corrosion and oxidation along with high tensile and creep-rupture properties at temperatures to 1300˚C. Its excellent relaxation resistance is useful for high-temperature springs and bolts. Used in gas turbines, rocket engines, nuclear reactors, pressure vessels, tooling, and aircraft structures.

Equivalent Grades

Trademark	GB	GOST	ASTM	UNS	DIN	W.Nr.	NF	BS	JIS	SS
Inconel X-750	GH4145	ЭИ974	Inconel X-750	N07750	XCr15Fe7TiAl	2.4669	XCr15Fe7TiAl	XCr15Fe7TiAl	NCF 750	–

Chemical Composition, %

Alloy

Inconel X-750

≤0.08

≤0.50

≤1.00

≤0.015

≤0.010

14.0-17.0

≥70.0

≤1.0

0.7-1.2

0.4-1.0

2.25-3.75

≤0.50

5.0-9.0

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

Density, g/cm3	Melting Point, ℃	Tensile Strength, MPa	Yield Strength, MPa	ELongation, %	Hardness, HRB
8.28	1390-1430	855	427	40	–

Available Products and Specifications

Rod, Bar, Wire and Forgings	ASTM B637/ASME SB637, ISO 9723/9724/9725, EN 10269, BS HR505(Wire), SAE AMS 5698/5699(Wire)
Plate, Sheet and Strip	ISO 6208, SAE AMS 5542/5598
Pipe and Tube	–
Welding Product	–
Others	SO 6208, SAE AMS 5542/5598

Features

High strength at temperatures to 1500oF (816℃) after suitable heat treatment
Creep-rupture strength at high temperatures to about 700℃(1290oF)
High tensile and creep-rupture properties
Resistance to a wide variety of industrial corrosives under both oxidizing and reducing conditions
Excellent workability including machinability and welding
Resistance to chloride ion stress-corrosion cracking
Precipitation hardenable