GH4169 (Inconel 718) High-Temperature Alloy Round Bar | 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 (1202°F).

✓ Oxidation Resistance: Stable Cr₂O₃ oxide layer formation at 800°C (1472°F), reducing scaling by 80% vs. 310S stainless steel.

✓ Cryogenic-to-High-Temperature Performance: Maintains ductility from **-250°C (-418°F)** to 700°C (1292°F).

✓ Precision Machinability: Hot-rolled and cold-drawn bars with **±0.5% diameter tolerance** and Ra ≤0.8μm surface finish for CNC machining.

GH4169 (Inconel 718) High-Temperature Alloy Round Bar

Engineered for aerospace, oil & gas, and nuclear applications demanding extreme mechanical strength and thermal stability, GH4169 alloy round bar 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 (1292°F). Certified to AMS 5662, AMS 5663, and ASTM B637, 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.

Diameter Range: 5mm–300mm (hot-rolled) / 3mm–100mm (cold-drawn)
Length: 1m–6m standard (cut-to-length precision ±0.5mm)
Surface Finishes: Turned & Polished (Ra ≤0.4μm), Electropolished (Ra ≤0.2μm), 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), AMS 5663 (Aerospace), ASTM B637 (International)
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	Hot-rolled, Cold-drawn, Annealed & Pickled, Ground, Polished (Ra ≤0.8μm).
Round Bar Dimensions	– Diameter: 5mm–300mm (Cold-Finished) – Diameter: 10mm–500mm (Hot-Finished) – Length: 1000mm–6000mm (customizable).
Key Applications	Aerospace turbine disks, rocket engine components, nuclear reactor parts, high-temperature fasteners, and oil/gas downhole tools.

GH4169 (Inconel 718) High-Temperature Alloy Round Bar Applications

Industry	Critical Components	GH4169 Round Bar Advantage
Aerospace	Jet engine turbine disks, landing gear bolts	1,100 MPa yield strength at 650°C for 20,000+ flight cycles.
Oil & Gas	Subsea wellhead connectors, drill collars	Resists H₂S/CO₂ corrosion at 200°C (392°F) + 25,000 psi.
Nuclear	Reactor core fasteners, control rod drive mechanisms	Immune to neutron embrittlement and stress corrosion cracking (SCC).
Energy	Gas turbine shafts, steam valve stems	Withstands creep deformation at 700°C (1292°F).

GH4169 (Inconel 718) High-Temperature Alloy Round Bar Product Packaging

GH4169 (Inconel 718) High-Temperature Alloy Round Bar 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 Round Bar 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-stress applications?

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 mechanical 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 5663 specs.

Q3: Are bars certified for aerospace turbine components?

Full compliance includes: