Relying on "nominal" material parameters carries significant risks when performing finite element analysis (FEA) or 3D modeling for aero-engine turbines or high-pressure nuclear reactors. Key pain points for design engineers and procurement personnel include:
Data inconsistency: The yield strength of standard "commercial-grade" materials varies significantly with temperature, leading to dangerous over-design or premature component failure.
Microstructure segregation: Internal "spots" and coarse grains reduce the accuracy of thermal stress simulations.
Redundant costs: Using excessively high safety factors due to a lack of reliable material property data increases the project's procurement budget.
At Gnee Alloy, we eliminate these uncertainties. Our GH4169 high-temperature alloy is specifically designed to ensure data stability and provide the precise mechanical properties required for your high-risk design drawings.
Click to learn about the mechanical properties of GH4169
Microstructure and Mechanical Properties of GH4169 Superalloy
Microstructure and Mechanical Properties of GH4169 Superalloy
GH4169 is a niobium-strengthened nickel-based superalloy (similar to Inconel 718) renowned for its excellent high-temperature strength, fatigue resistance, and creep resistance up to 650°C. Its microstructure is primarily reinforced by coherent body-centered tetragonal (BCT) and face-centered cubic (FCC) precipitates within a γ matrix, typically controlled by heat treatment (solution treatment at 1010–1095°C). Its mechanical properties are optimized by minimizing the hard, brittle Laves phase while promoting the precipitation of strengthening phases.
What is GH4169 equivalent to?
Inconel 718
GH4169 is a high-strength nickel-based superalloy primarily used in aerospace and high-temperature applications. It is equivalent to: Inconel 718 (USA) Alloy 718 (UNS N07718).
1. Gnee Alloy GH4169 Alloy Process
The "stiffness" of our GH4169 (equivalent to Inconel 718) is achieved through precise control of the γ′′ (γ′) and δ (Delta) phases.
Grain Refinement: We guarantee grain sizes to ASTM E112 Grade 8 or finer. Fine grains are the foundation of industrial durability and high fatigue life.
Vacuum Ion Melting (VIM) + Vacuum Vacuum Tempering (VAR) Melting: Eliminates impurities that cause localized softening, ensuring a consistent response throughout the batch to the double aging heat treatment.
Zero Segregation: Our controlled vacuum tempering (VAR) prevents macrosegregation, ensuring the core and surface of the forging have the same mechanical strength.
Vacuum Ion Melting (VIM) + Vacuum Vacuum Tempering (VAR)
2. Precision mechanical properties of GH4169 alloy
We provide validation data based on AMS 5662 and ASTM B637 standards. These values are the benchmarks for our quality assurance agreements.
Typical mechanical properties of GH4169 (fully aged state):
| Test Temp (℃/°F) | Yield Strength σp0.2 (MPa) | Tensile Strength σb (MPa) | Elongation δ5 (%) | Reduction of Area ψ (%) |
| 20°C (Room) | ≥ 1030 MPa | ≥ 1240 MPa | ≥ 12% | ≥ 15% |
| 650°C (1200°F) | ≥ 850 MPa | ≥ 1000 MPa | ≥ 15% | ≥ 20% |
| 700°C (1292°F) | ≥ 750 MPa | ≥ 880 MPa | ≥ 18% | ≥ 25% |
3. Physical properties of GH4169 alloy
| Property | Value | Significance |
|---|---|---|
| Density | 8.19 g/cm³ (0.296 lb/in³) | Weight calculation |
| Melting Range | 1260 – 1336°C (2300-2440°F) | Fire resistance margin |
| Thermal Conductivity (20°C) | 11.4 W/m·K | Heat dissipation |
| Thermal Conductivity (500°C) | ~16.0 W/m·K | High-temperature performance |
| Coefficient of Thermal Expansion (20-100°C) | 13.0 × 10⁻⁶/°C | Fitting compatibility |
| Coefficient of Thermal Expansion (20-600°C) | ~14.5 × 10⁻⁶/°C | High-temperature design |
| Specific Heat (20°C) | 435 J/kg·K | Thermal capacity |
| Specific Heat (600°C) | ~500 J/kg·K | High-temperature thermal capacity |
| Modulus of Elasticity (20°C) | ~200 GPa (29.0 × 10⁶ psi) | Stiffness |
| Modulus of Elasticity (600°C) | ~175 GPa (25.4 × 10⁶ psi) | Hot stiffness |
| Modulus of Elasticity (700°C) | ~165 GPa (23.9 × 10⁶ psi) | High-temperature stiffness |
| Poisson's Ratio | 0.29 – 0.30 | Stress analysis |
| Electrical Resistivity | 1.25 µΩ·m | – |
| Magnetic Permeability | ~1.005 (slightly magnetic) | – |
Click to download the GH4169 alloy PDF file now
4. Why choose Tier 1 manufacturer Gnee Alloy?
✅️Data Stability: Our materials are produced in ISO 9001 and AS9100 certified facilities, ensuring that the material you test in the lab is the material you get in production.
✅️Direct Factory Price: Eliminate markups from trading agents and secure Wholesale Pricing on premium superalloys.
✅️MTC 3.1 Traceability: Full EN 10204 3.1 Mill Test Certificates detailing elevated temperature tensile testing for every individual heat.
✅️Global Logistics: Fast and secure shipping to Europe, USA, UAE, and Southeast Asia.
Gnee Steel GH4169 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 GH4169 interchangeable with Inconel 718 for FEA simulations?
A: Yes. GH4169 is the technical equivalent of UNS N07718. They share identical physical constants and mechanical responses to heat treatment, making them globally interchangeable in international engineering software.
Q2: How do you ensure "Data Stability" across different batches?
A: We utilize a Closed-Loop Manufacturing system. By keeping the VIM + VAR melting parameters and the double-aging cycle consistent down to the millisecond, we achieve a batch-to-batch property deviation of less than 3%.
Q3: Can you provide customized stress-rupture testing for my project?
A: Absolutely. Our in-house lab can perform custom Creep and Stress-Rupture Testing (e.g., 650°C / 690 MPa) to provide the specific life-cycle data your design team requires.
Q4: Do you support small trial orders for material validation?
A: Yes. As a Reliable Supplier, we support innovation. We offer small MOQs for certified GH4169 sheet specimens and rod samples for your internal testing.
