For engineers in the aerospace propulsion, nuclear, and oil & gas sectors, the primary pain point is Material Reliability under Pressure. When your system operates at temperatures up to 650°C (1200°F) and high internal pressures, standard stainless steel pipes simply won't cut it. They suffer from:
Burst Risk: Welded pipes have a longitudinal weak point (the weld seam) prone to failure under cyclic pressure.
Strength Loss: Many alloys soften rapidly above 500°C, leading to "ballooning" or rupture.
Corrosion Attack: High-temp corrosive media can lead to rapid pitting and wall thinning.
Our GH4169 nickel-based alloy seamless tubes are engineered to master these extremes. As a leading Manufacturer, we combine the precipitation-hardening strength of Alloy 718 with precision-cold-drawing technology to ensure Industrial Durability.
Check GH4169 Tube Stock & Wholesale Pricing Today
GH4169 Nickel-based Alloy High-Pressure Heat-Resistant Seamless Tube Manufacturer
GH4169 Nickel-based Alloy High-Pressure Heat-Resistant Seamless Tube Manufacturer
GH4169 (Inconel 718) seamless tubing is a premium nickel-based precipitation-hardening superalloy tubing designed for extreme pressure, temperature, and corrosive environments. These seamless tubes offer exceptional creep strength up to 700°C, high tensile strength, and excellent oxidation resistance, making them ideal for aerospace, nuclear, and petrochemical applications.
Is Inconel 718 a nickel-based superalloy?
Inconel 718 is a nickel-based superalloy, ideal for applications requiring high strength to be maintained over a temperature range from low temperatures to 1400°F (760°C).
1. GH4169 Seamless Pipe Technology
Unlike welded pipes, our seamless pipes are produced using hot piercing and multiple cold drawing/rolling processes.
Zero Weld Seams: Eliminates the risk of intergranular corrosion and weld stress concentration.
Precision Tolerances: We offer ultra-tight outer diameter and wall thickness tolerances to ensure perfect matching with high-pressure fuel lines and hydraulic systems.
VIM + VAR Purity: Our pipes are made from high-purity steel ingots (vacuum induction melting + vacuum arc remelting), ensuring a clean microstructure and effective resistance to fatigue cracking.
VIM + VAR Purity
2. GH4169 Tube Specifications & Technical Data
We maintain a large inventory of standard-sized wholesale products that can be shipped immediately. We also offer custom processing services to meet non-standard needs.
GH4169 pipe size range:
| Feature | Range / Specification | Commercial Advantage |
| Outside Diameter (OD) | 6mm to 219mm (1/4" to 8") | Covers all hydraulic & fuel specs. |
| Wall Thickness (WT) | 0.5mm to 25.0mm | High-Pressure Rated options. |
| Standard Schedules | Sch 40, Sch 80, Sch 160, XXS | In-stock for Fast Global Shipping. |
| Length | 1000mm to 6000mm | Custom Cut-to-Size service. |
Mechanical properties of GH4169 seamless tube at 650°C (complete aging):
| Property | Value at 650°C (1200°F) | Why it Matters |
| Yield Strength (σp0.2) | ≥ 850 MPa | Prevents deformation under high pressure. |
| Tensile Strength (σb) | ≥ 1000 MPa | High safety factor against bursting. |
| Stress Rupture Life | ≥ 100h at 690 MPa | Ensures Long-term Service Life. |
Get a quote and technical consultation for GH4169 seamless steel pipe now
3. Advantages of GH4169 Seamless Tubes
Superior Corrosion Resistance: Withstands harsh environments, including high-salt environments and chemical processing.
High Strength: Superior creep rupture properties, high tensile and yield strength.
Excellent Welding: Can be welded in both annealed and age-hardened conditions, though heat treatment is often applied.
Customization: Available in various sizes, shapes (round, hollow), and finishes (pickled, annealed).
4. Industrial Applications of High Temperature Alloy GH4169 Seamless Tubes
Aerospace: High-pressure fuel lines, engine manifolds, and hydraulic actuator tubing.
Nuclear Engineering: Heat exchanger tubing and high-strength structural conduit.
Oil & Gas: Deep-sea downhole hydraulic control lines and sour gas (H2S) transport.
Chemical Processing: Critical heat exchangers handling hot corrosive media.
Why Choose Gnee as Your Nickel-Based Alloy Supplier
✅ Over 18 years of export experience, products sold to more than 80 countries
✅ Certified by ISO, SGS, and BV
✅ Global inventory of Inconel, Hastelloy, Incoloy, and Monel alloy tubing, plates, and bars
✅ Custom processing services available – including cutting, polishing, CNC machining, and packaging
✅ Fast delivery within 7-15 days, supported by global logistics partners
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 your GH4169 tube equivalent to Inconel 718?
A: Yes. GH4169 is the Chinese designation that maps directly to Inconel 718 (UNS N07718). Our tubes are produced to be globally interchangeable and meet the same high-pressure performance standards.
Q2: Can GH4169 tubes be easily welded during installation?
A: Absolutely. GH4169 is famous for its Superior Weldability compared to other superalloys. Because the aging response is delayed, it can be welded in the solution-treated state without risk of post-weld cracking.
Q3: What is the maximum pressure rating for a Sch 80 GH4169 pipe?
A: This depends on the OD and operating temperature. For a 1/2" Sch 80 pipe at 650°C, the allowable working pressure is significantly higher than 316L stainless steel. We can provide Pressure Rating Calculations for your specific design upon request.
Q4: Do you offer bulk discounts for major infrastructure projects?
A: Yes. We provide attractive Bulk Discounts and dedicated project management for large-scale procurement in the aerospace and energy sectors.
