For engineers in the aerospace, nuclear, and petrochemical industries, material reliability under pressure is a major challenge. At temperatures up to 650°C (1200°F), standard stainless steel or low-grade alloy tubing suffers from the following problems:
Creep cracking: Under sustained high-temperature stress, the tube wall thins and eventually cracks.
Oxidation and corrosion: High-pressure, high-temperature gases cause pitting and scaling in inferior materials.
Weld integrity issues: In many applications, welded pipes become localized weak points.
Our GH4169 nickel-based alloy seamless tubing is the ideal solution. As a leading manufacturer, we offer tubing with performance comparable to alloy 718, specifically designed to maintain structural integrity under extreme pressure and temperature conditions.
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GH4169 Nickel Alloy High Temperature and High Pressure Seamless Tube
GH4169 Nickel Alloy High Temperature and High Pressure Seamless Tube
GH4169 (equivalent to Inconel 718 or UNS N07718) tube is a high-quality precipitation-hardening nickel-based superalloy seamless tube designed for extreme working conditions. Seamless tubes made from this material are specially designed to withstand both high temperature and high pressure.
What is GH4169 equivalent to?
Inconel 718
GH4169 (equivalent to the American brand Inconel 718) is a precipitation-hardening nickel-based superalloy widely used in the aerospace industry due to its excellent mechanical properties (Lu et al., 2014).
1. GH4169 Seamless Tube Manufacturing Process
Unlike welded tubes, our GH4169 seamless tubes are manufactured using a hot piercing and multi-stage precision cold drawing and rolling process. This ensures:
Zero joint risk: Uniform mechanical properties across the tube's circumference maximize the safety of high-pressure fuel and hydraulic lines.
VIM + VAR purity: Our tubes are made from ingots produced using vacuum induction melting and vacuum arc remelting, ensuring an ultra-clean microstructure that enhances fatigue resistance.
Aerospace-grade standards met: We manufacture strictly according to AMS 5589 and AMS 5590 standards.
VIM + VAR purity
2. GH4169 Seamless Steel Pipe 🧪 Chemical Composition (approximate percentage)
| Element | Composition (%) |
|---|---|
| Nickel (Ni) | 50.00 – 55.00 |
| Chromium (Cr) | 17.00 – 21.00 |
| Iron (Fe) | Balance |
| Niobium (Nb) + Tantalum (Ta) | 4.75 – 5.50 |
| Molybdenum (Mo) | 2.80 – 3.30 |
| Titanium (Ti) | 0.65 – 1.15 |
| Aluminum (Al) | 0.20 – 0.80 |
Click to download the GH4169 alloy PDF file now
3. 🔧 GH4169 Manufacturing and Technical Specifications
Process: Cold-drawn or Cold-rolled Seamless.
Standards: Typically conforms to AMS 5589/5590 or Chinese GB/T 14992 / GB/T 15065 standards.
Heat treatment: solution treatment + aging treatment to obtain the optimal microstructure (y'' phase).
4. 📋 Key technical data points of GH4169
| Property | Value |
|---|---|
| Density | ≈ 8.24 g/cm³ |
| Melting Range | 1260 – 1336°C |
| Yield Strength (650°C) | ≈ 850+ MPa |
| Tensile Strength (650°C) | ≈ 1000+ MPa |
Download GH4169 Seamless Tube Technical Datasheet
5. Gnee Steel GH4169 Seamless Pipe Inspection Methods
As a reliable supplier, Gnee Steel understands that in critical heat-resistant applications, there is no room for error. Every meter of GH4169 pipe undergoes the following inspections:
100% Ultrasonic Testing (UT): Detects internal voids or microcracks.
100% Eddy Current Testing (ET): Ensures surface integrity.
Hydrostatic Testing: Verifies its ability to withstand high-pressure operating limits.
Traceability: Each batch of products comes with a complete EN 10204 3.1 factory test certificate (MTC).
6. GH4169 Piping Applications
Our heavy-duty GH4169 piping is widely used in:
Gas turbines: High-pressure fuel lines and heat exchangers.
Nuclear engineering: High-strength structural ducts and sensor housings.
Petrochemicals: Critical heat-resistant piping for high-pressure chemical reactions.
Aerospace: Hydraulic systems and engine manifolds.
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FAQ
Q1: Is GH4169 the same as Inconel 718 tubing?
A: Yes. GH4169 is the Chinese designation that maps directly to Inconel 718 (UNS N07718). Our GH4169 tubes are chemically and mechanically identical to Alloy 718, making them a globally accepted Cost-effective Solution.
Q2: What are the advantages of seamless GH4169 over welded pipes?
A: Seamless tubes offer significantly higher burst pressure ratings and are immune to the intergranular corrosion that can occur at the weld zone in high-temperature service. For aerospace and high-pressure nuclear use, seamless is always preferred.
Q3: Can you provide tubes in the solution-annealed state for easier bending?
A: Absolutely. We can supply pipes in the Solution Treated condition (for easy fabrication/bending) or the Fully Aged condition (for maximum strength), depending on your project requirements.
Q4: Do you offer bulk discounts for major projects?
A: Yes. As a direct Tier-1 Manufacturer, we offer competitive Wholesale Pricing and volume discounts for large-scale energy and industrial projects.