GH4169 (Inconel 718) High-Temperature Alloy Pipe | Unmatched High-Temperature Strength & Fatigue Resistance

✓ Ultra-High Yield Strength: Achieves 1,275 MPa yield strength after aging – 40% stronger than Inconel 625 at 650°C (1,202°F).

✓ Oxidation Resistance: Stable Cr₂O₃ oxide layer formation at 800°C (1,472°F), reducing scaling by 80% vs. 310S stainless steel.

✓ Cryogenic-to-High-Temperature Versatility: Maintains ductility from **-250°C (-418°F)** to 700°C (1,292°F).

✓ Precision Manufacturing: Seamless/welded pipes with **±0.1mm wall thickness tolerance** and Ra ≤0.8μm internal finish for high-pressure systems.

GH4169 (Inconel 718) High-Temperature Alloy Pipe

Engineered for aerospace, oil & gas, and nuclear applications demanding extreme mechanical strength and thermal stability, GH4169 alloy pipe combines a nickel-chromium-iron matrix (Ni-52.5%, Cr-19%, Fe-18.5%, Nb-5%, Mo-3%) to deliver exceptional yield strength, creep resistance, and corrosion resistance up to 700°C (1,292°F). Certified to AMS 5662, ASTM B637, and ASME SB637, this age-hardenable superalloy outperforms Inconel 625 and Waspaloy in high-stress, high-temperature environments, offering 2x the fatigue lifespan of 316L stainless steel in cyclic load applications.

Sizes: OD 10mm–600mm × WT 1mm–40mm (seamless) / OD 600mm–1,500mm × WT 5mm–60mm (welded)
Length: 1m–12m standard (cut-to-length precision ±2mm)
Surface Finishes: Pickled, Electropolished (Ra ≤0.4μm), Shot Peened
Mechanical Properties (Aged): Yield Strength ≥1,100 MPa | Tensile Strength ≥1,400 MPa | Elongation ≥12% | Hardness ≤40 HRC

Parameter Category	Value/Description
Material Standard	GB/T 14992 (China), ASTM B637 (International), AMS 5663 (Aerospace)
Chemical Composition (%)	Ni (Balance), Cr 17–21, Fe ≤18, Nb+Ta 4.75–5.5, Mo 2.8–3.3, Ti 0.65–1.15, Al 0.2–0.8, C ≤0.08, Mn ≤0.35, Si ≤0.35, S ≤0.015, P ≤0.015, Cu ≤0.3
Tensile Strength (MPa)	≥1240 (Solution Treated & Aged)
Yield Strength (MPa)	≥1035 (Solution Treated & Aged)
Elongation (%)	≥12 (in 50mm gauge length)
High-Temperature Strength	– 650°C: Tensile Strength ≥950 MPa – 650°C: 100h Creep Rupture Strength ≥300 MPa
Hardness	Brinell (HBW): 330–400; Rockwell (HRC): 35–45
Density (g/cm³)	8.19
Melting Range (°C)	1260–1336
Thermal Conductivity (W/m·K)	11.4 (at 20°C)
Thermal Expansion (10⁻⁶/°C)	13.0 (20–600°C)
Electrical Resistivity (Ω·m)	1.28 × 10⁻⁶ (at 20°C)
Elastic Modulus (GPa)	200
Oxidation Resistance	Excellent oxidation resistance up to 700°C in air. Stable under cyclic thermal stress.
Corrosion Resistance	Resists pitting, chloride stress corrosion, and high-temperature oxidation. Avoid strong acids (e.g., HNO₃).
Heat Treatment	– Solution Treatment: 980°C (1h, air cooling) – Aging: 720°C (8h, furnace cool to 620°C, hold 8h, air cool).
Surface Finishes	Seamless, Annealed & Pickled, Polished (Ra ≤0.8μm), or Cold-Drawn.
Pipe Dimensions	– Outer Diameter (OD): 10mm–500mm (Seamless) – Wall Thickness: 1mm–50mm – Length: 1000mm–12000mm (customizable).
Key Applications	Aerospace engine exhaust systems, nuclear reactor coolant pipes, oil/gas downhole tubing, chemical processing pipelines, and high-pressure hydraulic systems.

GH4169 (Inconel 718) High-Temperature Alloy Pipe Applications

Industry	Critical Use Cases	GH4169 Pipe Advantage
Aerospace	Jet engine fuel nozzles, turbine exhaust ducts	1,100 MPa yield strength at 650°C for 20,000+ flight cycles.
Oil & Gas	Subsea wellhead connectors, sour gas pipelines	Resists H₂S/CO₂ corrosion at 200°C (392°F) + 25,000 psi.
Nuclear	Reactor coolant pipes, control rod housings	Immune to neutron embrittlement and stress corrosion cracking (SCC).
Energy	Gas turbine shafts, steam valve manifolds	Withstands creep deformation at 700°C (1,292°F).

GH4169 (Inconel 718) High-Temperature Alloy Pipe Product Packaging

GH4169 (Inconel 718) High-Temperature Alloy Pipe are engineered for aerospace turbines, nuclear reactors, and high-stress industrial applications (operating up to 1,300°C). To ensure dimensional accuracy and metallurgical integrity during global transit, we deploy aerospace-grade packaging systems and thermal-controlled logistics compliant with AMS 5662, NACE MR0175, and ISO 4955 standards.

Why Choose Us

Where Precision Meets Partnership，25 years of focus on metal material science，Not only a supplier, but also your engineering consultant，Fast and zero compromise，Sustainable trust cycle。

GH4169 (Inconel 718) High-Temperature Alloy Pipe Shipping

Sea transport

40HQ container (loading capacity 28 tons) / bulk carrier (LCL minimum 1 ton)

Air transport

reach major airports around the world within 7 days (DDP/DAP terms)

Land transport

door-to-door within China (qualification for dangerous goods transportation)

Our Services

We guarantee global door-to-door delivery within 7–15 business days via partnerships with DHL, Maersk, and UPS.

FAQ

Q1: How does GH4169 compare to Inconel 625 in high-pressure piping?

A: GH4169 offers 40% higher yield strength at 650°C and superior fatigue resistance, while Inconel 625 excels in chloride-rich environments.

Q2: What aging treatment optimizes GH4169 pipe properties?

A: Solution anneal at 955–980°C (1,750–1,800°F) for 1h, air cool, then age at 720°C (1,330°F) for 8h and 620°C (1,148°F) for 8h to achieve AMS 5662 specs.

Q3: Are pipes certified for aerospace turbine components?

Full compliance includes: