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Product Overview

Introduction To Inconel 718 / Alloy 718 / UNS N07718

Inconel 718

MOKSH TUBES & FITTINGS LLP proudly manufactures, supplies, exports, and stocks a wide range of INCONEL 718 (UNS N07718) products. These include Pipes & Tubes, Pipe Fittings, Flanges, Fasteners, Sheets & Plates, Coils, Wires, Round Bars, Flat Bars, Angles, Channels, Welding Rods, Wire Mesh, and other custom and difficult-to-source Alloy 718 components.

INCONEL 718 is a nickel chromium alloy known for its excellent high strength, corrosion resistance, and weldability, particularly in high temperature environments ranging from cryogenic up to 700°C (1290°F). A key advantage of INCONEL 718 is its ability to be precipitation hardened, providing high tensile, fatigue, creep, and rupture strength. It is highly resistant to post-weld cracking, oxidation, and a wide range of corrosive environments. These properties make it ideal for use in the aerospace, marine, chemical processing, and power generation industries.

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INCONEL 718 Specifications

Category Details
Grade INCONEL® 718
UNS N07718
Alloy Family Nickel-Based Superalloy
Condition Supplied Solution Annealed, Aged, Cold Worked
Heat Treatment Solution Annealed + Aged
Welding Excellent (No post-weld cracking)
Testing Chemical, Mechanical, PMI, UT / RT (on request)
Certification EN 10204 3.1 / 3.2

Chemical Composition of INCONEL 718

Element Range (%)
Nickel (Ni + Co) 50.0 – 55.0
Chromium (Cr) 17.0 – 21.0
Iron (Fe) Balance
Niobium (Nb + Ta) 4.75 – 5.50
Molybdenum (Mo) 2.80 – 3.30
Titanium (Ti) 0.65 – 1.15
Aluminum (Al) 0.20 – 0.80
Cobalt (Co) ≤ 1.00
Carbon (C) ≤ 0.08
Manganese (Mn) ≤ 0.35
Silicon (Si) ≤ 0.35
Phosphorus (P) ≤ 0.015
Sulfur (S) ≤ 0.015
Boron (B) ≤ 0.006
Copper (Cu) ≤ 0.30

Technical Composition of Alloy 718

Physical Properties of Alloy 718

Property Condition Value
Density Annealed 0.296 lb/in³
Density Annealed & Aged 0.297 lb/in³
Melting Range 2300–2437°F (1260–1336°C)
Specific Heat 0.104 Btu/lb°F (435 J/kg°C)
Curie Temperature Annealed -320°F (< –196°C)
Curie Temperature Aged -170°F (–112°C)
Magnetic Permeability @ 200 Oersted Annealed 1.0013
Magnetic Permeability @ 200 Oersted Aged 1.0011

Heat Treatment of INCONEL 718

Process Temperature Range Purpose
Solution Annealing 940 – 980°C Dissolves precipitates, restores ductility
Aging (Single) 720°C → 620°C Develops high strength
Double Aging 720°C + 620°C Improves creep & fatigue resistance
Stress Relieving 600 – 650°C Dimensional stability

INCONEL 718 achieves strength only through precipitation hardening.

Mechanical Properties of Inconel 718

Condition Tensile Strength Yield Strength Elongation Hardness Impact Strength
Cold Worked + Solution Annealed + Aged High High 40–30% High ≥ 20 ft-lb
Hot Worked + Solution Annealed + Aged High High 40–30% High ≥ 20 ft-lb
Heavy Section (203–254 mm) Slightly Lower Slightly Lower 25% High ≥ 20 ft-lb

INCONEL 718 provides exceptional creep rupture strength, fatigue life, and fracture toughness.

International Standards & Equivalent Grades

Standard Equivalent
UNS N07718
W.Nr 2.4668
DIN NiCr19NbMo
AMS 5662 / 5663 / 5664
ISO NiCr19NbMo

Products in Inconel 718

INCONEL 718 products suitable for high-stress, high-temperature, and cryogenic applications. These products are widely used in aerospace, power generation, oil & gas, chemical processing, and marine engineering.

Seamless Pipes
Welded Pipes (ERW & EFW)
Tubes (Capillary, U-Bend)
Sheets & Plates
Coils & Strips
Round Bars, Flat Bars, Hex Bars, Square Bars
Pipe Fittings (Elbows, Tees, Reducers, Caps, Stub Ends)
Flanges (Weld Neck, Slip-On, Blind, Socket Weld, Threaded)
Fasteners (Bolts, Nuts, Screws, Washers, Studs)
Custom Fabricated Components

This alloy meets several recognized industry standards, including:

Uses and Advantages

Outstanding strength and durability across a wide temperature range
Precipitation hardenable for enhanced mechanical performance
Excellent weldability without post-weld cracking
High resistance to stress corrosion cracking, pitting, and crevice corrosion
Exceptional fatigue and creep-rupture strength

Applications of Inconel 600

Inconel 718 is a precipitation-hardenable nickel-chromium alloy known for its outstanding strength, corrosion resistance, and creep-rupture performance at temperatures up to 700°C (1290°F). Its unique ability to combine weldability, high yield strength, and resistance to oxidation makes it a trusted material for mission-critical components across multiple industries.

Aerospace and Jet Engines

Used extensively in turbine discs, compressor blades, engine casings, fasteners, and exhaust parts. INCONEL 718 maintains strength and fatigue resistance under extreme conditions, making it ideal for flight-critical components.

Gas Turbines and Power Generation

Applied in land-based turbines, transition ducts, combustion liners, and hardware that must endure prolonged exposure to high heat and pressure.

Nuclear and Marine Applications

Selected for components like core support structures, reactor pressure boundaries, springs, and fasteners that require high strength and stability in corrosive or radioactive environments.

Automotive and Motorsports

Employed in turbocharger rotors, exhaust valves, and high-performance engine components where resistance to heat and mechanical stress is critical.

Oil and Gas Exploration

Commonly used in downhole tools, wellhead equipment, fasteners, and mandrels. INCONEL 718 performs exceptionally well in high-pressure, high-temperature (HPHT) wells and corrosive environments containing hydrogen sulfide and chlorides.

Cryogenic Storage and Transportation

Thanks to its excellent toughness and ductility at low temperatures, it’s often used in cryogenic vessels, valves, and structural parts for liquefied gas systems.

Chemical Processing Equipmen

Used in heat exchangers, reactor vessels, and processing units where both strength and corrosion resistance are needed in acidic and oxidizing chemical environments

WHY CHOOSE US?

Unmatched expertise in high-performance nickel alloys
Wide inventory of hard-to-source materials
Custom solutions with precision engineering
International shipping and quick turnaround
Total quality control and compliance with global standards

INCONEL 718 Price per kg in India

Typical Range: ₹4,800 – ₹8,500 per kg

(Price depends on form, size, heat treatment & certification)

Contact us for exact quotation based on size and quantity.

FAQ's

What is Inconel 718 and what makes it special?

Inconel 718 (UNS N07718) is a high-performance nickel-chromium alloy known for its outstanding strength, corrosion resistance, and weldability in extreme temperature environments. Unlike many other alloys, Inconel 718 can be precipitation hardened, which gives it superior tensile, fatigue, creep, and rupture strength. It performs reliably from cryogenic temperatures up to 700°C (1290°F) while resisting oxidation, post weld cracking, and corrosive attack, making it a preferred material for aerospace, marine, chemical processing, and power generation industries.

Where is Inconel 718 commonly used?

Inconel 718 is widely applied across industries that demand both mechanical strength and corrosion resistance. In aerospace, it is used for turbine discs, compressor blades, casings, and fasteners. Power generation plants rely on it for gas turbines, transition ducts, and combustion hardware. It also plays a key role in nuclear and marine components, automotive and motorsport engine parts, oil and gas exploration tools, cryogenic storage systems, and chemical processing equipment where long term stability in aggressive environments is crucial.

What are the key advantages of Inconel 718?

The main advantages of Inconel 718 include its outstanding strength across a wide temperature range, excellent weldability without post-weld cracking, and its ability to be precipitation hardened for enhanced mechanical performance. It offers superior resistance to stress corrosion cracking, pitting, and crevice corrosion while maintaining exceptional fatigue and creep-rupture strength. These properties make it highly durable and cost effective for industries where materials must withstand high pressure, extreme heat, and chemically aggressive conditions.

How does the chemical composition of Inconel 718 enhance its performance?

The chemical composition of Inconel 718 includes 50–55% nickel, 17–21% chromium, and controlled additions of niobium, molybdenum, titanium, and aluminum, with iron making up the balance. The nickel chromium base provides superior corrosion resistance in oxidizing and reducing environments, while niobium and molybdenum contribute to precipitation hardening for improved strength. Titanium and aluminum enhance creep resistance and structural stability, giving Inconel 718 the ability to maintain its mechanical properties under extreme operating conditions.

Why choose Moksh Tubes & Fittings LLP for Inconel 718 products?

Moksh Tubes & Fittings LLP is a trusted global manufacturer, supplier, exporter, importer, and stockist of Inconel 718 products in various forms, including pipes, tubes, fittings, flanges, fasteners, sheets, plates, coils, wires, bars, and custom-fabricated components. With unmatched expertise in high performance nickel alloys, a wide inventory of rare materials, advanced engineering capabilities, and a strong international supply chain, the company ensures timely delivery and top-quality products. Customers prefer Moksh Tubes & Fittings LLP for its commitment to precision, reliability, and global compliance standards in every Inconel 718 solution.

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