IN718

IN718 is a nickel base precipitation hardening equiaxed superalloy. Alloy to‘ γ’ Phase is the main strengthening phase‘ γ’ The phase is auxiliary strengthening phase.

Equivalent Grades

Trademark	GB	GOST	ASTM	UNS	DIN	W.Nr.	NF	BS	JIS	SS
–	K4169	–	IN718	–	–	–	–	–	–	–

Chemical Composition, %

Alloy

IN718

0.02-0.08

≤0.35

≤0.015

17.0-21.0

50.0-55.0

≤1.0

2.8-3.3

0.3-0.7

0.65-1.15

4.4-5.4

≤0.10

Bal

Typical Physical and Mechanical Properties (RT, Solution Annealed)

Density, g/cm3	Melting Point, ℃	Tensile Strength, MPa	Yield Strength, MPa	ELongation, %	Hardness, HRB
8.22	1243-1359	1035	890	15	/

Available Products and Specifications

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

Features

The alloy has high strength and plasticity in a wide medium and low temperature range of – 253-700℃, excellent corrosion and radiation resistance, good welding and forming properties, and good resistance to strain aging cracks.

Applications

The alloy is widely used in aviation, aerospace engines, nuclear reactors and chemical fields. It is suitable for making engine blades, blade casings and other structural parts working below 650℃.