GH4169 High-temperature alloy pipes for deep-sea oil and gas environments
Gnee Steel
GH4169 High-temperature alloy pipes for deep-sea oil and gas environments
GH4169 (Inconel 718) tubing is widely used in the deep-sea oil and gas industry due to its high strength, corrosion resistance, and high temperature resistance (up to 700°C), making it suitable for harsh environments. A key consideration is its sensitivity to stress concentration and contact point wear, both of which can lead to cracking. Therefore, appropriate heat treatment is crucial for controlling the microstructure and optimizing fatigue performance.
Gnee Steel
What is GH4169?
GH4169 is a nickel-chromium alloy containing significant amounts of iron, niobium, and molybdenum, as well as small amounts of aluminum and titanium. It is known for its high strength, excellent corrosion resistance, and good weldability. It is commonly used in gas turbines and jet engines.
GH4169 High-temperature alloy pipes Material Equivalent Grade
| STANDARD | UNS | EN | WERKSTOFF NR. | JIS | GOST | BS | AFNOR |
| GH4169 | N07718 | – | 2.4668 | NCF 718 | – | – | – |
GH4169 High-temperature alloy pipes Chemical Structure
| element | Minimum | Maximum |
| Si | - | 0.035 |
| C | - | 0.008 |
| P | - | 0.0015 |
| Ti | 0.065 | 1.015 |
| Mn | - | 0.035 |
| B | - | 0.06 |
| Al | 0.02 | 0.08 |
| Cr | 17 | 21 |
| Co | - | 1 |
| Fe | Balance | |
| Cu | - | 0.03 |
| Nb | 4.075 | 5.05 |
| Mo | 2.08 | 3.03 |
| Ni | 50 | 55 |
GH4169 High-temperature alloy Tube Yield Strength
| Temper | Solution-treated | |
| Tensile Rm | 155 | ksi (minimum) |
| Tensile Rm | 1069 | MPa (minimum) |
| R.p. 0.2% Yield | 95 | ksi (minimum) |
| R.p. 0.2% Yield | 655 | MPa (minimum) |
| Elongation (2" or 4D gl) | 30 | % (minimum) |
Advantages for Deep-Sea Applications
High Temperature and Creep Resistance: GH4169 maintains excellent strength and creep resistance at high temperatures, which is crucial for deep-sea operations.
Corrosion Resistance: This nickel-based superalloy resists corrosion from seawater and other corrosive media common in marine environments.
High Strength and Toughness: It possesses high tensile strength, creep resistance, and fracture resistance, effectively preventing deformation and breakage.
Good Weldability: This facilitates the manufacture of complex piping systems.
Materials Testing:
Mechanical Property Testing (e.g., tensile strength testing)
Hardness Testing
Chemical Composition Analysis (e.g., spectral analysis)
Materials Composition Identification (PMI testing)
Flattening Test
Microscopic and Macroscopic Testing
Pitting Resistance Test
Flanging Test
Intergranular Corrosion (IGC) Test
Why Choose Gnee Nickel Alloy (Supplier Example)?
✅ Large stock of GH 4169 stainless steel strip/coil available for fast shipping.
✅ Factory direct sales, highly competitive prices, excellent value for money.
✅ Comprehensive quality assurance: Material Testing Certificate (MTC), Chemical Composition Certificate, and Mechanical Properties Certificate.
✅ Value-added services: Slitting, Cutting, Polishing, Surface Treatment.
✅ Worldwide shipping, secure and reliable packaging, and provision of export documentation.
Email: ss@gneemetal.com
Gnee Steel is a professional manufacturer of various nickel-based alloys, including Nickel 201, Nickel 202, Hastelloy C-276, Hastelloy C-22, Hastelloy B, Hastelloy C-4, Inconel Alloy 600, Inconel 625, Inconel 718, Inconel X-750, Incoloy Alloy 800, Incoloy 800H/HT, Incoloy 825, Monel Alloy 400, Monel K500, and high-temperature alloys. We specialize in the production and sales of alloy materials. Gnee Steel's products are widely used in aerospace, chemical, power, automotive, and nuclear energy industries, and we can provide customized alloy material solutions according to customer needs. For alloy material price inquiries or to request customized alloy material solutions, please feel free to contact us at ss@gneemetal.com for a quote.
