Inconel

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Inconel

Inconel is a family of high-performance nickel-chromium-based superalloys known for their exceptional resistance to oxidation, corrosion, and high-temperature strength. These alloys maintain their mechanical integrity even in extreme environments such as aerospace, marine, and chemical processing industries. Inconel 600 offers excellent resistance to chloride-ion stress corrosion cracking, Inconel 601 is ideal for high-temperature oxidation resistance, Inconel 625 is renowned for its outstanding fatigue and creep-rupture strength, and Inconel 718 provides superior tensile and yield strength with remarkable weldability. With their ability to withstand both acidic and alkaline conditions, Inconel alloys are a preferred choice for demanding industrial applications.

Monel Products and their Grades

Product Grades
Refractory Anchors ASTM B166 UNS N06600, ASTM B167 UNS N06601, ASTM B443 UNS N06625, ASTM B670 UNS N07718
Pipes B167, B517, B444, B704
Tubes B167, B775, B516, B861, B444, B704
Pipe Fitting B366
Forged Fitting B564
Flanges B564

Chemical Composition of Inconel Alloys

Grade Ni (%) Cr (%) Fe (%) Mo (%) Nb + Ta (%) Co (%) Al (%) Ti (%) C (%) Si (%) Mn (%) S (%)
Inconel 600 72.0 min 14.0 – 17.0 6.0 – 10.0 - - 1.0 max 0.35 max 0.35 max 0.15 max 0.50 max 1.0 max 0.015 max
Inconel 601 58.0 – 63.0 21.0 – 25.0 Balance - - 1.0 max 1.0 – 1.7 0.3 – 0.6 0.10 max 0.50 max 1.5 max 0.015 max
Inconel 625 58.0 min 20.0 – 23.0 5.0 max 8.0 – 10.0 3.15 – 4.15 1.0 max 0.40 max 0.40 max 0.10 max 0.50 max 0.50 max 0.015 max
Inconel 718 50.0 – 55.0 17.0 – 21.0 Balance 2.8 – 3.3 4.75 – 5.50 1.0 max 0.20 – 0.80 0.65 – 1.15 0.08 max 0.35 max 0.35 max 0.015 max

Mechanical Properties of Inconel Alloys

Grade Tensile Strength (MPa) Yield Strength 0.2% Proof (MPa) Elongation (%) Hardness (HB)
Inconel 600 655 240 40 ~150
Inconel 601 620 205 30 ~160
Inconel 625 827 414 30 ~220
Inconel 718 1375 1100 12 ~330

Applications of Inconel Alloys

Inconel alloys, including Inconel 600, 601, 625, and 718, are renowned for their exceptional resistance to oxidation, corrosion, and extreme temperatures. They maintain high strength and stability even under the most demanding environments, making them ideal for aerospace, marine, power generation, and chemical processing industries.

Aerospace Industry

Used in jet engines, turbine blades, and exhaust systems due to outstanding heat and oxidation resistance.

Chemical Processing

Ideal for reactors, heat exchangers, and piping systems handling corrosive chemicals at high temperatures.

Power Generation

Used in steam generators, gas turbines, and nuclear reactors for their high creep and fatigue strength.

Marine Applications

Applied in marine exhaust systems, seawater-cooled heat exchangers, and offshore platforms.

Heat Treatment Equipment

Used for furnace hardware, retorts, and fixtures due to excellent resistance to high-temperature scaling.

Oil & Gas Industry

Used in downhole and subsea equipment exposed to sour gas and high-pressure, high-temperature environments.