inconel 718

Unifit Metalloys Inc (UMI) Unifit Metalloys Inc is one of the leading Manufacturer, Supplier & Exporter of Inconel 718 Round Bars, Sheets,Pipes, Pipe Fittings, Flanges and Fasteners . We also offer these Material in different specifications. These pipes & tubes are widely used in various applications industry like oil and gas, petrochemical, medicine, food, paper, machinery, natural gas etc. The Inconel 718 Seamless Pipes ASTM B444 UNS N07718 are manufactured to sustain very high pressure and product warranty. We can meet most ASME, ASTM, and other specifications, and can cross-reference to most international standards.

Inconel 718
UNS: N07718 W. Nr./EN: 2.4668

Alloy 718 is a high strength nickel base superalloy used for cryogenic temperatures up to long term service at 1200°F. The alloy is readily fabricated and
may be welded in either the annealed or precipitation (age) hardened condition. Anneal 1700 -1850°F, air cool or faster. Age 1325°F 8 hours, furnace cool
to hold at 1150°F, for a total aging time of 18 hours, air cool. Alloy 718 will show a contraction of 0.0008 inch/inch after precipitation hardening.
Forms of Inconel 718 Available at UNIFIT METALLOYS INC

  • Sheet
  • Plate
  • Bar
  • Wire

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

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

 

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 (BOP’s)
  • Gas turbine engine parts

Features of Inconel 718
Good mechanical properties: tensile, fatigue and creep-rupture
Excellent welding characteristics, resistant to postweld age cracking
Oxidation resistant throughout its useful temperature range

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

s

 

 

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