Products Description
Product Specifications
| Standards | SAE AMS 5589 |
| Steel Grades | Inconel 718 (UNS N07718) |
| Equivalent Standards | ASTM B444, ASTM B829, EN 2.4668, UNS N07718 |
| Outer Diameter (OD) | 3 mm – 219 mm |
| Wall Thickness (WT) | 0.3 mm – 25 mm |
| Length | 6/12 m |
| Surface Treatment | Bright annealed (BA), pickled |
| Production Process | Cold Pilgering / Cold Drawing |
| Condition | Solution Annealed |
Inconel 718 tubing operates reliably across a temperature range from cryogenic levels (-253°C) to high temperatures (704°C), with an oxidation resistance limit of 982°C, making it ideally suited for the fluctuating thermal conditions found in aero-engines.
With its high nickel and chromium content, Inconel 718 offers superior resistance to pitting and intergranular corrosion-outperforming martensitic precipitation-hardening stainless steels like 17-4PH-when exposed to sulfur-bearing gases from jet fuel combustion and marine salt-spray environments.
Customized Services
- TORICH offers aerospace-grade high-purity pickling and passivation, bright annealing, and precision polishing of both inner and outer surfaces to enhance the smoothness of the tube's internal wall.
- We support processes such as bending, flaring, swaging, end beveling, and forming, and can customize various specialized aerospace tubing assemblies.
- Solution treatment temperatures can be adjusted based on service conditions (with precise control within the 941–996°C range), and hardness specifications can be tailored to requirements (standard ≤40 HRC; hardening treatments available for high-strength applications).
Chemical Composition
| Element | Ni | Cr | Nb+Ta | Mo | Ti | Al | C | Mn | Si | S | P | Co | Cu |
| Inconel 718 | 50–55 | 17–21 | 4.75–5.50 | 2.80–3.30 | 0.65–1.15 | 0.20–0.80 | ≤0.08 | ≤0.35 | ≤0.35 | ≤0.015 | ≤0.015 | ≤1.00 | ≤0.30 |
Mechanical Properties
| Property | Tensile Strength | Yield Strength (0.2% MPa) | Elongation (%) | Hardness (Rockwell C) |
| Value | ≥ 965 MPa | ≥ 550 MPa | ≥ 30 | ≤ 36 |
Possible Alternative Grades
- Inconel 625 is the most common alternative to Inconel 718; although it has lower tensile strength, it offers superior corrosion resistance and lower cost, making it suitable for cryogenic fluid piping and non-critical cooling systems in aerospace applications.
- For aerospace piping systems transporting highly corrosive media, Hastelloy C276 is an option; it provides excellent corrosion resistance but comes at a higher cost than Inconel 718.
- For combustion zone components and gas turbine parts requiring high oxidation resistance at temperatures above 700°C, Hastelloy X (UNS N06002) is a suitable choice.
application areas
- Aircraft engine systems: engine fuel delivery lines, fuel manifolds, hydraulic control lines, etc.
- Aerospace hydraulic systems: flight control hydraulic lines, actuator control piping, etc.
- Gas turbine applications: turbine instrumentation piping, compressor monitoring lines, etc.
Products Show
Testing Equipment
Factory Equipment
Pickling equipment
Polishing equipment
Cold drawing equipment
Products Package
FAQ
Q: What are the key differences between SAE AMS 5589 and AMS 5590 Inconel 718 tubing?
A: AMS 5589 covers seamless tubing in the solution-annealed condition, offering excellent weldability and formability suitable for tube bending and welded assemblies; AMS 5590 covers tubing in the precipitation-hardened condition, which offers higher hardness and strength but reduced formability.
Q: What is the product delivery condition? Is additional heat treatment by the customer required?
A: The standard delivery condition is solution-annealed, descaled, and clean (free of oil/grease). The material meets all performance specifications, so no further heat treatment is required for standard applications; the tubing is ready for immediate machining and assembly.
Q: Do you supply finished tube assemblies with end fittings?
A: Yes, we provide tube-end forming services based on customer drawings, including 37-degree flaring, ISO 6149 fitting pre-assembly, spherical seal machining, and welding of threaded adapters.
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