UNS N07718 (Inconel 718)

Inconel 718 /UNS N07718

Inconel 718 Material grades and equivalents

Inconel 718 / GB GH4169 / UNS N07718 / SEW VDIUV W.Nr.2.4668 NiCr19Fe19Nb5Mo3 / BS NA 51/ AFNOR NC19FeNb

Inconel 718 Chemical composition:

%	Ni	Cr	Fe	Mo	Nb	Co	C	Mn	Si	S	Cu	Al	Ti
Min.	50	17	balance	2.8	4.75							0.2	0.7
Max.	55	21		3.3	5.5	1	0.08	0.35	0.35	0.01	0.3	0.8	1.15

 

Inconel 718 Physical properties:

Density	8.2 g/cm³
Melting point	1260-1340 ℃

 

Inconel 718 Alloy minimum mechanical properties in the roomtemperature:

Alloy	Tensile strength Rm N/mm²	Yield strength R P0. 2N/mm²	Elongation A 5 %	Brinell hardness HB
Solutiontreatment	965	550	30	≤363

 

Inconel 718 Characteristic as below：

1.workability

2.High tensile strength,endurance strength,creep strength and rupture strength at 700℃.

3.High inoxidability at1000℃.

4.Steady mechanical performance in the low temperature.

5.Good welding performance.

Inconel  718 Metallurgical structure:

Inconel 718 is Austenitic structure, precipitation hardening generate “γ” made it excellent mechanical performance. G rain boundary generate “δ” made it the best plasticity in the heat treatment.

Inconel  718 Corrosion resistance:

Inconel 718 with extremely resistance to stress corrosion cracking and pitting ability in high temperature or low temperature environments, especially the inoxidability in the high temperature.

Inconel 718 Application field：

1. The elevated temperature strength, excellent corrosion resistance and workability at 700℃ properties made it use in a wide range of high requirement environments.

2. 1.Steam turbine 2.Liquid-fuel rocket

3. 3.Cryogenic engineering 4.Acid environment 5.Nuclear engineering

Specifications:

 

Sheet/Plate	AMS 5599/AMS 5879/ASME SB-443 Gr. 1/ASTM B670
Wire	ASTM B670
Bar/Forging	AMS 5666/ASME SB-446 Gr. 1/ASTM B-446 Gr. 1