For international purchasing managers and aerospace engineers, the biggest challenge when encountering the GB/T 14992 GH4169 standard lies in the uncertainty of equivalence.
Is the chemical purity of Chinese-made GH4169 the same as Inconel 718?
Can its mechanical properties pass rigorous aerospace or nuclear energy audits?
Can the manufacturer provide documentation that meets global engineering specifications?
At Gnee Steel, we eliminate substitution risks. Our GH4169 seamless steel pipes are fully compatible with UNS N07718. We provide cost-effective solutions for global energy and aerospace projects while ensuring structural integrity.
Contact our professionals to recommend the right alloy for your project
GB/T 14992 GH4169 Global Equivalent Inconel 718 UNS N07718 Seamless Steel Pipe
GB/T 14992 GH4169 Global Equivalent Inconel 718 UNS N07718 Seamless Steel Pipe
GB/T 14992 GH4169 is a grade of high-strength precipitation-hardening nickel-chromium-iron superalloy in the Chinese national standard. Its function is identical to that of the globally recognized Inconel 718 pipe (UNS N07718 / W.Nr. 2.4668). Seamless steel pipes made from this alloy are designed for extreme environments, exhibiting excellent tensile strength, creep rupture strength, and corrosion resistance at temperatures up to 700°C (1300°F).
What are the properties of UNS N07718 material?
Inconel Alloy 718 (UNS designation N07718) is one of the most commonly used nickel-based superalloys, an alloy class defined by high strength and resistance to elevated temperatures, corrosion, and oxidation. IN718 is especially designed for fatigue and creep resistance at temperatures up to 700°C.
1. GH4169 alloy pipe global standard
To ensure your project proceeds as planned, our GH4169 meets multiple international engineering standards.
| Country | Standard | Designation | Product Form |
| China | GB/T 14992 / GB/T 15062 | GH4169 | Seamless Tubes / Bars |
| USA | AMS 5589 / ASTM B637 | UNS N07718 (Alloy 718) | Aerospace / Industrial |
| Europe | DIN 17751 / W.Nr. 2.4668 | NiCr19NbMo | Energy Sector |
| UK | BS HR 202 | NA 51 | Aviation Standards |
Each order comes with an EN 10204 3.1 Factory Test Certificate (MTC) proving that its metallurgical properties meet these global standards.
2. Chemical composition of GH4169 seamless tube (based on UNS N07718)
| Element | Ni | Cr | Nb (Niobium) | Mo | Ti | Al | P/S |
| GH4169 Spec | 50.0-55.0% | 17.0-21.0% | 4.75-5.50% | 2.8-3.3% | 0.65-1.15% | 0.20-0.80% | ≤0.010% |
3. Mechanical properties of GH4169 tube (fully aged)
| Property | Room Temp (20°C) | Elevated Temp (650°C) | Why It Matters |
| Yield Strength | ≥ 1030 MPa | ≥ 850 MPa | Resists permanent deformation. |
| Tensile Strength | ≥ 1240 MPa | ≥ 1000 MPa | Prevents pressure bursting. |
| Elongation | ≥ 12% | ≥ 15% | Excellent ductility & safety. |
Click to download the GH4169 alloy PDF file now
4. GH4169 Pipe Common Specifications and Dimensions
Seamless pipes/fittings (GH4169/UNS N07718) are typically manufactured according to standards such as ASTM B163 (condensers/heat exchangers), ASTM B983 (seamless pipe), and ASME SB163.
Manufacturing Processes: Cold rolled, hot rolled, seamless.
Outer Diameter (OD): Range from 10.3 mm to 324 mm (or larger, depending on the supplier).
Wall Thickness: Available in various wall thickness grades (Sch5S, Sch10S, Sch40S, Sch80S).
5. GH4169 seamless steel tubes are primarily used in the following fields
Aerospace: Jet engine components, turbine blades, casings, and fasteners.
Oil & Gas: Downhole tools, valves, and high-pressure wellhead components.
Power Generation: Gas turbines, nuclear reactors, and steam turbines.
Chemical Industry: Heat exchangers and reactor coils.
Why choose to purchase GH4169 pipes from Gnee Steel wholesale supplier?
✅️Tier-1 Supplier Quality: We serve global OEMs in the aerospace, nuclear, and oil & gas sectors.
✅️Wholesale Inventory: We maintain an active stock of Sch 40 and Sch 80 GH4169 pipes ready for Immediate Dispatch.
✅️Direct Factory Price: Skip the international trading agents and secure original manufacturer rates.
✅️Global Logistics: Fast shipping to USA, Europe, UAE, and Southeast Asia with specialized seaworthy packaging.
Gnee Steel GH4169(inconel 718) Certificate
📦 Packaging and Shipping
All Nickel Based Alloy products are packaged using the following methods:
Wooden pallets or crates
Moisture-proof packaging
Labels with furnace number, standard, and size labels
Shipped worldwide by sea, air, or express
Gnee Steel GH4169 Product Packing
Contact us for the latest export price quote for GH4169 Alloy
FAQ
Q1: Is GH4169 chemically identical to Inconel 718?
A: Yes. GH4169 is the technical designation used within the Chinese GB/T standard system for the exact same metallurgical system as Inconel 718 (UNS N07718). They are used interchangeably in global engineering blueprints.
Q2: Can your GH4169 tubes pass aerospace quality audits?
A: Absolutely. Our materials are manufactured in AS9100 certified facilities and are tested according to AMS 5589/5590 requirements, ensuring they meet the world's most rigorous aerospace quality protocols.
Q3: Do you offer cut-to-length and precision grinding?
A: Yes. We offer Custom Fabrication, including precision cutting and centerless grinding to achieve h8-h11 tolerances for specialized assemblies.
Q4: Do you support small batch prototype orders?
A: Yes. As part of our Wholesale Supply model, we support innovation by offering flexible MOQ options for both GH4169 and Alloy 718 tubing.
