Products Description
Built for the world's harshest operating conditions, our Inconel 718 seamless pipe is a precipitation‑hardened nickel‑chromium superalloy tubular solution, engineered to hold stable mechanical performance across cryogenic to 700 °C working temperatures. Free of welded joints, it delivers exceptional pressure tightness, fatigue resistance and anti‑corrosion capacity against sour gas, chloride and thermal oxidation. Many field‑proven projects rely on this tubing to avoid unexpected shutdowns in high‑stress industrial systems. Every batch undergoes strict PMI‑OES, hydrostatic and dimensional inspection before shipment, matching ASTM B983, AMS 5589 and UNS N07718 standards.
Chemical Composition&Mechanical Properties
Chemical Composition (UNS N07718, wt.%)
| Element | Min | Max |
|---|---|---|
| Nickel (Ni) | 50.0 | 55.0 |
| Chromium (Cr) | 17.0 | 21.0 |
| Niobium + Tantalum (Nb+Ta) | 4.75 | 5.50 |
| Molybdenum (Mo) | 2.80 | 3.30 |
| Titanium (Ti) | 0.65 | 1.15 |
| Aluminum (Al) | 0.20 | 0.80 |
| Iron (Fe) | Balance | Balance |
Mechanical Properties (Room Temp, Solution‑treated & Aged per ASTM B983)
| Property | Minimum Value |
|---|---|
| Ultimate Tensile Strength | 896 MPa (130 ksi) |
| 0.2% Offset Yield Strength | 758 MPa (110 ksi) |
| Elongation (50 mm gauge) | 12 % |
Note: Actual values vary with wall thickness and heat‑treatment condition. Solution‑annealed pipes offer better formability with lower strength; precipitation‑aged condition delivers maximum high‑temperature strength for critical service.
Typical Applications
This alloy pipe serves critical hardware where ordinary stainless steel fails.
Aerospace & Gas Turbine: Engine fuel lines, hydraulic tubing, bleed‑air ducts, turbine auxiliary piping, coping with repeated thermal cycling.
Oil & Gas HPHT wells: Downhole tool tubing, wellhead flow lines, resisting H₂S / CO₂ sour‑gas corrosion, compliant with NACE MR0175 requirements.
Chemical & Petrochemical: Heat‑exchanger tubes, reactor auxiliary piping for corrosive high‑temperature process media.
Power & Nuclear Energy: Instrumentation tubing and cooling circuit parts requiring long‑term dimensional stability.
About Us – Jiangsu Cunrui Metal Products Co., Ltd.
We are a professional nickel‑base superalloy manufacturer and exporter located in Jiangsu, China. Our factory runs complete cold‑drawing, heat‑treatment and surface‑treatment workshops for high‑end alloy pipes, bars and sheets. We do not only supply standard stock sizes, but also handle custom‑dimension orders against client drawings. Our in‑house lab carries out full material testing, and we issue EN 10204 3.1 test certificates for every lot. Over years of export experience, we have supported engineering buyers from aerospace, oil‑gas and energy sectors worldwide.
Our Business Scope
Jiangsu Cunrui Metal Products Co., Ltd supplies full‑range nickel‑base alloys, duplex steel and special stainless products: seamless pipe, welded tube, round bar, plate, sheet and matching pipe fittings. We support small trial orders and large‑volume project procurement. We provide seaworthy IPPC packing, VCI anti‑rust protection, full set export documents, and arrange shipping solutions for sea freight, air cargo or courier delivery. We serve clients across North America, Southeast Asia, Europe, Middle East and CIS regions. Besides standard inventory, we accept custom OD, wall thickness, cutting‑length and special heat‑treatment requirements.
FAQ
Q: What certifications can you provide for Inconel 718 seamless pipe?
A: Standard supply includes EN 10204 3.1 mill test report with full heat‑number traceability. Third‑party inspection (SGS / BV) and PMI test reports are available upon your request.
Q: What size ranges are available? Can you make custom sizes?
A: OD from 6 mm up to 273 mm, various wall thickness / SCH grades. Custom outer diameter, wall thickness and fixed cutting lengths are acceptable based on production feasibility.
Q:What is the difference between seamless and welded Inconel 718 pipe?
A: Seamless version has no weld seam, better pressure‑bearing and anti‑fatigue performance, which is mandatory for HPHT, aerospace and sour‑gas critical services. Welded type fits lower‑pressure general‑purpose use with more competitive cost.
Q: What is your typical lead time for Inconel 690 seamless pipes?
A: For standard sizes in stock, shipment is available within 7–15 days. Custom orders typically require 4–6 weeks depending on specifications and quantity.
Q: What is your MOQ and lead‑time?
A: Small trial orders are welcome. Lead‑time depends on stock status or custom production schedule; we will offer clear timeline in formal quotation.
Q: How do you pack the superalloy pipes for export?
A: Products get VCI anti‑rust treatment first, then packed into IPPC marked wooden cases or bundles, suitable for long‑distance ocean transportation.
