Inconel 718 (UNS N07718 / W.Nr. 2.4668)

Inconel 718 (UNS N07718 / W.Nr. 2.4668) is a precipitation-hardenable nickel-chromium alloy also containing significant amounts of iron, niobium, and molybdenum along with lesser amounts of aluminum and titanium. It combines corrosion resistance and high strength with outstanding weldability including resistance to post weld cracking. The alloy has excellent creep-rupture strength at temperatures to 700℃.

Equivalent Grades

Trademark	GB	GOST	ASTM	UNS	DIN	W.Nr.	NF	BS	JIS	SS
Inconel 718	GH4169	–	Inconel 718	N07718	NiCr19Fe19Nb5Mo3	2.4668	NiCr19Fe19Nb5Mo3	NiCr19Fe19Nb5Mo3 ATG C1	–	–

Chemical Composition, %

Alloy

Nb+Ta

Inconel 718

≤0.08

≤0.35

≤0.015

17.0-21.0

50.0-55.0

≤1.0

2.8-3.3

4.75-5.50

0.2-0.8

0.65-1.15

≤0.30

Bal

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

Density, g/cm3	Melting Point, ℃	Tensile Strength, MPa	Yield Strength, MPa	ELongation, %	Hardness, HRB
8.19	1260-1336	≥1275	≥1034	–	≥331

Available Products and Specifications

Rod, Bar, Wire and Forgings	ASTM B637/ASME SB637, ISO 9723/9724/9725, DIN 17752-17754
Plate, Sheet and Strip	ASTM B670/ASME SB670, ASTM B906/ASME B906, ISO 6208, DIN 17750
Pipe and Tube	SAE AMS 5589/5590, DIN17751
Welding Product	Inconel Filler Metal 718-AWS A5.14/ERNiCrFe-2
Others	ASTM B366/ASME SB366(Fittings), DIN 17744

Features

Good mechanical properties – tensile, fatigue and creep-rupture
Yield tensile strength, creep, and rupture strength properties are exceedingly high
Highly resistant to chloride and sulfide stress corrosion cracking
Resistant to aqueous corrosion and chloride ion stress corrosion cracking
High temperature resistant
Age-hardenable with a unique property of slow aging response that permits heating and cooling during annealing without the danger of cracking.
Excellent welding characteristics, resistant to postweld age cracking