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Inconel Alloy 718

Our wide range of Inconel 718 has huge demand in the international market, which is a nickel-chromium-molybdenum alloy developed to resist a number of severely pitting, corrosive environments, and crevice corrosion. They also offer excellent yield, tensile, and creep-rupture properties at high temperatures.

INCONEL® 718

ASTM B637, B 670, B 906
UNS Number N07718
NACE MR-01-75


Other common names: Alloy 718, Haynes® 718, Nicrofer® 5219, Allvac® 718, Altemp® 718

Inconel 718 is a nickel-chromium-molybdenum alloy designed to resist a wide range of severely corrosive environments, pitting and crevice corrosion. This nickel steel alloy also displays exceptionally high yield, tensile, and creep-rupture properties at high temperatures. This nickel alloy is used from cryogenic temperatures up to long term service at 1200° F. One of the distinguishing features of Inconel 718’s composition is the addition of niobium to permit age hardening which allows annealing and welding without spontaneous hardening during heating and cooling. The addition of niobium acts with the molybdenum to stiffen the alloy’s matrix and provide high strength without a strengthening heat treatment. Other popular nickel-chromium alloys are age hardened through the addition of aluminum and titanium. This nickel steel alloy is readily fabricated and may be welded in either the annealed or precipitation (age) hardened condition. This superalloy is used in a variety of industries such as aerospace, chemical processing, marine engineering, pollution-control equipment, and nuclear reactors.

In what forms is Inconel 718 Available at Mega Mex?
What are the characteristics of Inconel 718?
Chemical Composition, %
Ni Fe Cr Cu Mo Nb C Mn
50.00-
55.00
Remainder 17.00-
21.00
.30 max 2.80-3.30 4.75-5.50 .08 max .35 max

P S Si Ti Al Co B
50.00-
55.00
Remainder 17.00-
21.00
.30 max 2.80-3.30 4.75-5.50 .006 max

In what applications is Inconel 718 used? ASTM Specifications
Sheet/Plate Bar Wire
B670 B637 -

Mechanical Properties
Typical room temperature properties, 1800°F annealed condition
Ultimate Tensile Strength, psi .2% Yield Strength psi Elongation % Hardness Rockwell B
135,000 70,000 45 100
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