General Description

Inconel 718 is a age-hardenable alloy that is highly corrosion resistant. Its high strength, corrosion resistance, and ease of weld fabrication have made alloy 718 the most popular superalloy used in industry.

Inconel 718 has good to excellent resistance to organic acids, alkalies and salts, and seawater. Fair resistance to sulfuric, hydrochloric, hydrofluoric, phosphoric, and nitric acids. Good to excellent resistance to oxidation, carburization, nitridation, and molten salts. Fair resistance to sulfidation.

Age-hardenable Inconel 718 combines high-temperature strength up to 700 °C (1300 °F) with corrosion resistance and excellent fabricability. Its welding characteristics, especially its resistance to postweld cracking, are outstanding. Because of these attributes, Inconel 718 is used for parts for aircraft turbine engines; high-speed airframe parts, such as wheels, buckets, and spacers; high-temperature bolts and fasteners, cryogenic tankage, and components for oil and gas extraction and nuclear engineering.

Chemical Composition

Grade Ni% Cr% Mo% Nb% Fe% Al% Ti% C% Mn% Si% Cu% S% P% Co%
Inconel 718 50-55 17-21 2.8-3.3 4.75-5.5 Bal. 0.2-0.8 0.7-0.15 Max 0.08 Max 0.35 Max 0.35 Max 0.3 Max 0.01 Max 0.015 Max 1.0

Specifications

Grade UNS Werkstoff Nr.
Inconel 718 N07718 2.4668

Physical Properties

Grade Density Melting Point
Inconel 718 8.2g/cm3 1260°C-1340 °C

Mechanical Properties

Inconel 718 Tensile Strength Yield Strength Elongation Brinell Hardness (HB)
Solution Treatment 965 N/mm² 550 N/mm² 30% ≤363

Our Production Specification

  Bar Forging Pipe/Tube Sheet/Strip Wire
Standard

ASTM B637
AMS 5662

AMS 5664

ASTM B637 AMS 5589/5590 ASTM B670 AMS 5832

Size Range

Inconel 718 wire, bar, rod, strip, forging, plate, sheet, tube, fastener and other standard forms are available.

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Check here: Inconel 718 used in oil and gas service