Inconel 718 Welded Pipes

We are one of the main manufacturers, suppliers, stockists, and exporters of high-performance Inconel 718 Welded Pipes of a variety of sizes, wall thicknesses and specifications. Such Welded Pipes are made using precipitation-hardened nickel-chromium alloy UNS N07718 (W.Nr. 2.4668), which has a high strength, resists corrosion, and oxidation even at high temperatures.

Our Inconel 718 Welded Pipe product is extensively utilized in the aerospace, oil and gas, marine, power generation and chemical processing sectors because it is higher in mechanical strength and ability to resist stress corrosion cracking. The pipes are produced with high ERW (Electric Resistance Welding) and EFW (Electric Fusion Welding) technologies with the aim of generating accurate dimensions and structure integrity.

The quality control procedures of our production and supply process are very strict. All welded pipes: UNS N07718 Welded Pipe are subjected to destructive and non-destructive testing (NDT), such as PMI, ultrasonic testing and hydro testing. We will be in accordance with international standards including ASTM B517, ASTM B705, and ASME SB517 of welded nickel alloy pipes.

Our specialization is Inconel 718 Welded Pipes, which are used in high pressure and high temperature use, as well as in all the schedules and diameters. Every order is thoroughly packed into export-grade packaging to avoid any transit damage and we offer full Mill Test Certificates (MTC) to ensure full traceability and transparency.

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Specification of Inconel 718 Welded Pipes

Our W.Nr. 2.4668 Welded Pipes are engineered for high-stress environments and manufactured in accordance with ASTM B517, ASTM B705, and ASME SB517 standards. These specifications ensure high-pressure compliance, dimensional accuracy, and long service life across demanding industrial applications.

Feature	Details
Size Range (OD)	0.5" to 24"
Wall Thickness (WT)	6.0 mm to 30.0 mm
Dimensional Standards	ASME B36.19, ASME B36.10
Schedules	SCH 5, 10, 20, 40, 80, 120, 160, XXS
Length	Single Random, Double Random, Cut Length
Forms	Round, Square, Rectangular
Manufacturing Types	ERW (Electric Resistance Welded), EFW (Electric Fusion Welded)

UNS N07718 Pipe Equivalent Grades

STANDARD	WERKSTOFF NR.	UNS
Inconel 718	2.4668	N07718

W.Nr. 2.4668 ERW Welded Pipe Chemical Composition

Grade	C	Mn	Si	S	Cu	Fe	Ni	Cr
Inconel 718	0.08 max	0.35 max	0.35 max	0.015 max	0.30 max	Balance	50.00 – 55.00	17.00 – 21.00

Mechanical Properties of ASTM B163 UNS N07718 ERW Pipes

Element	Density	Melting Point	Tensile Strength	Yield Strength (0.2% Offset)	Elongation
Inconel 718	8.2 g/cm³	1350 °C (2460 °F)	Psi – 135,000 \| MPa – 930	Psi – 75,000 \| MPa – 482	45 %

Types of Inconel Alloy 718 Pipes

Inconel 718 Condenser Pipe

Alloy 718 ERW Pipe

UNS N07718 ERW Welded Pipe

W.Nr. 2.4668 Heat Exchanger Pipe

Inconel 718 Rectangular Pipe

Inconel 718 Polished Pipe

Inconel 718 Round Pipe

Alloy 718 Square Pipe

UNS N07718 Welded Square Pipe Schedule Chart

Pipe Size (IPS / O.D.)	Schedules	Pipe Size (IPS / O.D.)	Schedules
6" IPS (6.625" O.D.)	SCH 10, 5, 80, 40, 160, 120 XXH	1/2" IPS (.840" O.D.)	SCH 5, 40, 10, 160, 80, XXH
3 1/2" IPS (4.000" O.D.)	SCH 40, 10, 160, 80, XXH	1/8" IPS (.405" O.D.)	SCH 40, 80
16" IPS (16.000" O.D.)	SCH10 (.188), SCH40 (.375)	2" IPS (2.375" O.D.)	SCH 40, 10, 160, 80, XXH
4" IPS (4.500" O.D.)	SCH 40, 10, 160, 80, XXH	1/4" IPS (.540" O.D.)	SCH 40, 10, 80
8" IPS (8.625" O.D.)	SCH 10, 5, 80, 40, 160, 120 XXH	3/4" IPS (1.050" O.D.)	SCH 40, 10, 160, 80, XXH
10" IPS (10.750" O.D.)	SCH 10, 20, TRUE 80 (.500), 40, 80 (.500)	1" IPS (1.315′ O.D.)	SCH 5, 40, 10, 160, 80, XXH
5" IPS (5.563" O.D.)	SCH 40, 10, 160, 80, XXH	3/8" IPS (.675" O.D.)	SCH 40, 10, 80
12" IPS (12.750" O.D.)	SCH 10, 20, TRUE40 (.406), 40 (.375), SCH80 (.500)	1-1/4" IPS (1.660" O.D.)	SCH 40, 10, 160, 80, XXH
14" IPS (14.000" O.D.)	SCH10 (.188), SCH40 (.375)	1-1/2" IPS (1.900" O.D.)	SCH 40, 10, 160, 80, XXH
18" IPS (18.000" O.D.)	SCH-40 (.375)	3" IPS (3.500" O.D.)	SCH 5, 40, 10, 160, 80, XXH
		2 1/2" IPS (2.875" O.D.)	SCH 40, 10, 160, 80, XXH

Manufacturing Process of Inconel 718 Welded Pipes

Inconel 718 Welded Pipes (UNS N07718 / W.Nr. 2.4668) are manufactured using high-quality alloy plates or strips that meet ASTM B517 and ASME SB517 standards. The material is first tested for chemical composition and quality compliance. It is then cold-formed into a cylindrical shape before the welding process begins.

After welding, the pipes undergo solution annealing and age hardening to improve strength, durability, and resistance to high temperature and pressure. Each pipe is inspected through non-destructive testing (NDT) to ensure weld integrity and dimensional accuracy.

Electric Resistance Welding (ERW) Process

In the ERW process, the edges of the formed Inconel 718 strip are heated using high-frequency electrical current and pressed together without filler material. This creates a strong and uniform longitudinal weld seam. ERW Inconel 718 Welded Pipes are ideal for small to medium diameters and offer good dimensional accuracy, smooth finish, and cost-effective production.

Electric Fusion Welding (EFW) Process

The EFW process is used for larger diameters and thicker wall Inconel 718 Welded Pipes. In this method, the edges of the plate are fused together using an electric arc, with or without filler metal. EFW pipes provide deeper weld penetration and are suitable for high-pressure and high-temperature applications in industries such as oil & gas and power generation.

Testing on Alloy 718 ERW Pipes

Flaring Test
Microstructure Test
Chemical Analysis
PMI Test
Mechanical Test and Flattening Test
Intergranular Corrosion (IGC) Test
Hardness Test
Macro Examination
Hydrostatic Test
Ultrasonic Testing

Applications of Inconel 718 Welded Pipes

Inconel 718 Welded Pipes are extensively used in:

Aerospace engine components
Gas turbines
Oil & gas exploration equipment
Heat exchangers
Pressure vessels
Nuclear power plants
Chemical processing systems
Marine exhaust systems

Their high tensile strength, creep resistance, and excellent weldability make Alloy 718 Welded Pipes suitable for extreme temperature and pressure environments.

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