For engineers in aerospace propulsion and gas turbine fields, insufficient materials validation is a major pain point. Relying on "nominal" values is risky when performing finite element analysis (FEA) or 3D modeling at temperatures as high as 650°C. You need validated mechanical properties to ensure structural integrity under extreme thermal and mechanical loads.
Our GH4169 high-temperature alloy tubing undergoes rigorous high-temperature testing. Utilizing the precipitation strengthening mechanism of the γ′′ (γ′) phase, our tubing maintains excellent yield strength even after thousands of hours of heat exposure, ensuring your components reach their expected long-term service life.
Request GH4169 Technical Datasheet & High-Temp Test Reports
Mechanical Properties of GH4169 Superalloy Pipe
Mechanical Properties of GH4169 Superalloy Pipe
GH4169 (UNS N07718) is a nickel-based superalloy that is widely used in aerospace applications (launch vehicles, engines) for seamless tubes, bends and structural components due to its excellent strength, fatigue resistance and corrosion resistance at temperatures up to 650°C.
What is GH4169 equivalent to?
Inconel 718
GH4169 (equivalent to the American brand Inconel 718) is a precipitation-hardened nickel-based superalloy, widely used in the aerospace industry because of its excellent mechanical properties (Lu et al., 2014).
1. GH4169 Mechanical Performance Data Table
Our material manufacturing standards exceed the requirements of AMS 5589 and ASTM B637, ensuring that your international blueprints meet global standards.
Typical mechanical properties of GH4169 tube (fully aged state):
| Temperature (℃/°F) | Yield Strength σp0.2 (MPa) | Tensile Strength σb (MPa) | Elongation δ5 (%) | Reduction of Area ψ (%) |
| 20°C (Room) | ≥ 1030 MPa | ≥ 1240 MPa | ≥ 12% | ≥ 15% |
| 650°C (1200°F) | ≥ 850 MPa | ≥ 1000 MPa | ≥ 15% | ≥ 20% |
| 700°C (1292°F) | ≥ 750 MPa | ≥ 950 MPa | ≥ 18% | ≥ 25% |
Creep fracture strength of high-temperature alloy GH4169 pipe (modeling anchor):
| Applied Stress (MPa) | Temperature (℃) | Rupture Life (h) | Elongation (%) |
| 690 MPa | 650°C | ≥ 100 Hours | ≥ 12% |
Click to download the GH4169 alloy PDF file now
2. Mechanical Properties of GH4169 Tubes (Solution-Treated State)
The mechanical properties of GH4169 seamless tubes (TWST) are highly dependent on the solution treatment (ST) temperature, which controls grain size, phase precipitation, and texture.
Yield Strength (Circumferential): Ranges from 260 to 305 MPa depending on the treatment temperature (e.g., approximately 305 MPa at 970°C; approximately 260 MPa at 1030°C).
Tensile Strength (Circumferential): Ranges from approximately 578 to 671 MPa.
Elongation (Circumferential): Exhibits high ductility, ranging from 27% to 36%, and increases with increasing solution treatment temperature.
Work Hardening Index (n): Typically between 0.34 and 0.36, indicating good deformation potential.
3. GH4169 pipe industrial applications
As a reliable supplier, Gnee Steel offers high-strength GH4169 pipes for:
Aero-engine Fuel Lines: Handling high-pressure fuel under vibration and heat.
Hydraulic Actuators: Maintaining precision tolerances in flight control systems.
Nuclear Structural Members: High-strength conduit requiring extreme radiation and heat resistance.
Cryogenic Components: Maintaining toughness down to -253°C for rocket fuel systems.
Contact us now to get the latest export price for GH4169 in 2026
Why choose Gnee Steel?
✅️Direct Factory Price: Eliminate middleman markups and secure the best rates for bulk energy projects.
✅️MTC 3.1 Traceability: Full heat-analysis and mechanical property verification included with every batch.
✅️Custom Fabrication: We offer precision cutting and centerless grinding to h8-h11 tolerances for specialized assemblies.
✅️Global Fast Shipping: We maintain a massive Wholesale Inventory for immediate dispatch.
Contact us for a quote on high-performance GH4169 !
Stop paying exorbitant prices for Western brands. We can offer you the same aerospace-grade GH4169 superalloy at a lower price. Our team is ready to provide you with a rapid quote (RFQ) within 12 hours.
Email: [ru@gneesteelgroup.com]
WhatsApp/WeChat: +86 15824687445
Website: [https://www.china-plate-steel.com/]
FAQ
Q1: Does the solution treatment temperature affect the final creep life?
A: Yes. Higher solution temperatures can coarsen the grain, which slightly improves creep strength but severely degrades fatigue life. We utilize a balanced solution cycle (940°C - 1010°C) to ensure the best overall Industrial Durability for your parts.
Q2: Is GH4169 tubing equivalent to Inconel 718 in terms of stress-rupture?
A: Absolutely. GH4169 is the Chinese designation that maps directly to the global UNS N07718 specification. Our material meets all international stress-rupture benchmarks for Inconel 718.
Q3: Can GH4169 pipes be used in high-pressure hydrogen service?
A: Yes. GH4169 has excellent resistance to hydrogen embrittlement due to its stable austenite matrix, making it a preferred choice for modern hydrogen storage and transport tubing.
Q4: Do you offer elevated temperature tensile testing for each individual order?
A: Yes. For critical aerospace or nuclear projects, we can perform custom high-temp testing and provide a certified lab report alongside your MTC 3.1.
