INCONEL® alloy 718 UNS N07718/W.Nr. 2.4668

Short Description:

INCONEL 718(UNS N07718) is a high-strength corrosion resistant nickel chromium material. The age-hardenable alloy can be readily fabricated. even into complex parts. Its welding characteristics. especially its resistance to post weld cracking, are outstanding. The ease and economy with which INCONEL alloy 718 can be fabricated, combined with good tensile, fatigue creep, and rupture strength, have resulted in its use in a wide range of applications. Examples of these are components for liquid fueled rockets, rings, casings and various formed sheet metal parts for aircraft and land-based gas turbine engines, and cryogenic tankage. It is also used for fasteners and instrumentation parts.

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Product Detail

Product Tags

Chemical Composition

Alloy	element	C	Si	Mn	S	P	Ni	Cr	Al	Ti	Fe	Cu	B
Alloy718	Min						50.0	17.0	0.20	0.65	Balance
Alloy718	Max	0.08	0.35	0.35	0.015	0.015	55.0	21.0	0.80	1.15		0.3	0.06
Other element	Mo:2.80~3.30,Nb:4.75~5.50;Co:1.0Max

Mechanical Properties

Aolly Status

Tensile strength

Rm Mpa

Min

Yield strength

R P 0. 2 Mpa

Min

Elongation

A 5

Min %

Reduction

of Area,

Min, %

Brinell hardness

Min

Solution

965

550

solution precipitation harden

1275

1034

331

Physical Properties

Density g/cm³	Melting Point ℃
8.20	1260~1336

Standard

Rod, Bar,Wire and Forging Stock - ASTM B 637, ASME SB 637

Plate, Sheet and Strip - ASTM B 670, ASTM B 906,ASME SB 670, ASME SB 906, SAE AMS 5596

Pipe and Tube - SAE AMS 5589, SAE AMS 5590

Characteristics of Inconel 718

● 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

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