Inconel 718 Sheet
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 degree. 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.
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 |
|
.015 max |
.015 max |
.35 max |
.65-1.15 |
.20-.80 |
1.00 max |
.006 max |
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Inconel 718 Sheet dimesion:
Thickness:0.3-20mm Width:100-1500mm Length:500-3000mm
Standard of Inconel 718 Sheet
ASTM B670
The 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
Applications of Inconel 718
Chemical processing Aerospace Liquid fuel rocket motor components Pollution-control equipment Nuclear reactors Cryogenic storage tanks Valves, fasteners, springs, mandrels, tubing hangers Well head completion equipment and blow out preventers Gas turbine engine parts
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