Inconel 718 Nickel Based Alloy Pipe

Jiangsu Ji Lai Da Nickel-Based Alloy Co., Ltd. supplies Inconel 718 nickel based alloy pipe in the dimensional range of OD 6 mm to 89 mm, wall thickness from 3 mm to 9 mm, and cut lengths from 3,000 mm to 10,000 mm. Each tube begins as a vacuum-induction-melted (VIM) billet and is hot-extruded into a seamless hollow — a process that preserves the alloy's fine-grained structure while achieving a material yield rate of ≥ 95%. After extrusion, the pipe undergoes solution annealing followed by precipitation aging (per AMS 5662 / AMS 5663), which precipitates the gamma-prime (γ') and gamma-double-prime (γ″) strengthening phases responsible for Inconel 718's legendary high-temperature strength. This is not a commodity stainless steel pipe — it is a precision-engineered nickel-based superalloy product purpose-built for critical service. Ji lai da welcomes trial orders, blanket purchase agreements, and third-party inspection by SGS, BV, or TÜV.

Product Parameter

Key Features

Precipitation-Hardening Strength — Far Beyond Stainless Steel

This is the defining difference between Inconel 718 and ordinary stainless steel pipes. While 304 and 316 rely solely on solid-solution strengthening and work hardening — losing substantial load-bearing capacity above 500 °C — Inconel 718 nickel based alloy pipe from Ji lai da is precipitation-hardenable. Through controlled aging heat treatment, nanometer-scale γ' (Ni₃(Al,Ti)) and γ″ (Ni₃Nb) precipitates form throughout the austenitic matrix, delivering yield strengths in excess of 1,000 MPa in the aged condition. For gas turbine components, downhole tools, and high-pressure cryogenic valves, this strength advantage is irreplaceable.

Exceptional High-Temperature & Cryogenic Performance

Inconel 718 maintains useful strength from cryogenic temperatures (-253 °C / liquid hydrogen) up to approximately 700 °C in long-term service. The alloy exhibits outstanding creep-rupture resistance, low thermal expansion, and minimal softening after prolonged thermal exposure — properties that no standard 300-series stainless steel can match. Ji lai da's hot-extruded Inconel 718 nickel based alloy pipe is the material of choice for jet engine bleed-air ducts, nuclear reactor internals, and deepwater subsea hardware where failure is not an option.

Seamless Hot Extrusion with ≥ 95% Yield — Minimal Material Loss

At Jiangsu Ji Lai Da Nickel-Based Alloy Co., Ltd., every Inconel 718 nickel based alloy pipe is produced by hot extrusion — a single-step forming process that converts a cylindrical billet into a precision hollow tube with dense, directional grain flow and zero weld seams. Our process achieves a finished-product yield rate of ≥ 95% with raw material loss below 5%, and the as-extruded surface is smooth and free of laps, folds, or scale. This directly benefits buyers: less waste means competitive pricing even on nickel-based superalloy orders where raw material cost dominates.

Excellent Fatigue & Stress-Rupture Resistance

Inconel 718 is renowned for its resistance to low-cycle fatigue and stress-rupture under cyclic thermal and mechanical loading. Unlike welded stainless steel pipes — which concentrate stress at the seam heat-affected zone and are vulnerable to premature fatigue cracking — the seamless, homogeneous structure of Ji lai da's Inconel 718 nickel based alloy pipe distributes stress uniformly, significantly extending service life in pulsating pressure and vibration-intensive applications such as reciprocating compressors and high-pressure pumps.

China Factory-Direct Supply with Full Certification

Jiangsu Ji Lai Da Nickel-Based Alloy Co., Ltd. is a genuine China manufacturer — not a trading intermediary. Every Inconel 718 nickel based alloy pipe ships with EN 10204 3.1 Mill Test Certificates covering chemical analysis (Ni, Cr, Nb, Mo, Ti, Al), mechanical properties (tensile, yield, elongation, hardness), hydrostatic test results, and dimensional inspection. We support third-party witness testing and can supply material in solution-annealed, aged, or stress-relieved conditions per project specification. Contact Ji lai da for a proforma invoice and lead-time estimate today.

Product Application

Inconel 718 nickel based alloy pipe from Jiangsu Ji Lai Da Nickel-Based Alloy Co., Ltd. is specified where temperature, pressure, and corrosion converge to exceed the limits of standard stainless steels:

● Aerospace: jet engine compressor and turbine sections, bleed-air ducts, exhaust systems, liquid rocket engine thrust chambers.
● Oil & Gas: downhole tool bodies, MWD/LWD housings, subsea Christmas tree components, high-pressure high-temperature (HPHT) wellhead tubing.
● Power Generation: gas turbine hot-section casings, nuclear reactor core support structures, supercritical steam piping.
● Cryogenics: liquid hydrogen / LNG transfer lines, cryogenic valve stems and seats, superconducting magnet structural tubing.
● Chemical Processing: high-temperature acid-handling systems where Hastelloy-grade corrosion resistance is needed alongside structural strength.

Frequently Asked Questions (FAQ)

Q1: What makes Inconel 718 different from 304 or 316 stainless steel?

A: The gap is fundamental. 304 and 316 are iron-based solid-solution alloys that soften significantly above 500 °C. Inconel 718 is a nickel-based, precipitation-hardenable superalloy — it can be heat-treated to form strengthening precipitates that deliver 3–4× the yield strength of annealed 316, and it retains this strength to ~700 °C. If your application involves sustained high temperature, high pressure, or cyclic loading, 316 stainless steel pipe will not perform; Inconel 718 nickel based alloy pipe from Ji lai da will.

Q2: Is Ji lai da capable of producing nickel-based superalloy pipes in-house?

A: Yes. Jiangsu Ji Lai Da Nickel-Based Alloy Co., Ltd. operates our own hot extrusion line and heat treatment furnaces, and we have extensive experience processing nickel-based alloys including Inconel 718, Inconel 625, Hastelloy C276, and Monel 400. We are a genuine China manufacturer — factory visits and process audits are welcomed by procurement teams worldwide.

Q3: What heat treatment conditions can you supply?

A: We supply Inconel 718 nickel based alloy pipe in solution-annealed condition (AMS 5662) or solution-annealed + precipitation-aged condition (AMS 5663). The aged condition delivers maximum strength and is recommended for most structural and pressure-containing applications. Please specify your required condition and mechanical property targets when submitting your RFQ.

Q4: Do you provide testing beyond standard mill certification?

A: Absolutely. In addition to EN 10204 3.1 MTC, we can arrange ultrasonic testing (UT), eddy current testing (ET), dye penetrant inspection (DPI), positive material identification (PMI), intergranular corrosion testing (ASTM A262), and mechanical testing at elevated temperatures. Third-party inspection by SGS, BV, TÜV, or Lloyd's Register is fully supported.

Q5: What are your minimum order quantities and lead times?

A: Ji lai da supports both trial orders and large-scale production runs. Minimum order quantities depend on the specific dimensions and heat treatment requirements — please send us your target specification for a tailored quotation. As a factory-direct China manufacturer, we offer shorter lead times than distributors because we control the entire production chain from billet to finished pipe.