In the field of high-performance nickel-based alloys, GH4169 (Alloy 718) and Inconel 625 often compete for the same project budget. For purchasing managers and engineers, the biggest challenge lies in balancing performance with processing complexity.
The dilemma of GH4169: It possesses unparalleled strength, but the complex double-aging heat treatment (over 16 hours) increases delivery time and cost.
The dilemma of Inconel 625: It is a "weld-and-maintain" material, but may not provide the mechanical stiffness required for rotating turbine components.
At Gnee Alloy, we eliminate these concerns. As a wholesale supplier, we offer both grades of material and help you choose the most cost-effective solution for your specific operating environment.
View the wholesale price list for GH4169 and Inconel 625 now
Is the GH4169 better than the Inconel 625? Comparing their price-performance ratios
Is the GH4169 better than the Inconel 625? Comparing their price-performance ratios
GH4169 (the Chinese version of Inconel 718) and Inconel 625 are both high-performance nickel-based superalloys, but there is no absolute "superiority" between them; on the contrary, they each have their own advantages in different application fields according to performance requirements.
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. Comparison of chemical composition (weight percentage) of GH4169 and Inconel 625
| Element | GH4169 (Inconel 718) | Inconel 625 | Key Difference |
|---|---|---|---|
| Nickel (Ni) | 50.0 – 55.0 | 58.0 min (Balance) | Inconel 625 has higher Ni |
| Chromium (Cr) | 17.0 – 21.0 | 20.0 – 23.0 | Inconel 625 higher Cr |
| Iron (Fe) | Balance (~18-20) | ≤ 5.0 | GH4169 has much higher Fe |
| Molybdenum (Mo) | 2.80 – 3.30 | 8.0 – 10.0 | Inconel 625 has ~3x more Mo |
| Niobium (Nb) | 4.75 – 5.50 | 3.15 – 4.15 | GH4169 higher Nb |
| Titanium (Ti) | 0.65 – 1.15 | ≤ 0.40 | GH4169 higher |
| Aluminum (Al) | 0.20 – 0.80 | ≤ 0.40 | GH4169 higher |
| Carbon (C) | ≤ 0.08 | ≤ 0.10 | Similar |
| Manganese (Mn) | ≤ 0.35 | ≤ 0.50 | Similar |
| Silicon (Si) | ≤ 0.35 | ≤ 0.50 | Similar |
| Phosphorus (P) | ≤ 0.015 | ≤ 0.015 | Similar |
| Sulfur (S) | ≤ 0.015 | ≤ 0.015 | Similar |
| Boron (B) | 0.002 – 0.006 | – | GH4169 unique |
| Cobalt (Co) | ≤ 1.00 | ≤ 1.0 | Similar |
Click to download the GH4169 alloy PDF file now
2. GH4169 and Inconel 625 technology comparison
| Feature | GH4169 (Alloy 718) | Inconel 625 (Alloy 625) | Commercial Impact |
| Strengthening Method | Precipitation (Aging) | Solid Solution | GH4169 is "Stiffer." |
| Yield Strength at 650°C | ≥ 850 MPa | ~ 300 - 350 MPa | 718 is nearly 3x Stronger. |
| Weldability | Excellent (Delayed Aging) | Superior (No Aging Req.) | 625 is easier for field repair. |
| Max Service Temp (Load) | 700°C (1292°F) | 600°C (1112°F) | Choose 718 for dynamic parts. |
| Pitting Resistance | Moderate | Elite (PREN 45-52) | 625 is better for seawater. |
| Cost Profile | Premium ($) | Economical () | Match budget to stress. |
3. High-Temperature Mechanical Properties of GH4169 and Inconel 625
| Temperature | Property | GH4169 (718) | Inconel 625 |
|---|---|---|---|
| 500°C | Tensile Strength | ~1150 MPa | ~800 MPa |
| Yield Strength | ~950 MPa | ~400 MPa | |
| 600°C | Tensile Strength | ~1100 MPa | ~750 MPa |
| Yield Strength | ~900 MPa | ~380 MPa | |
| 650°C | Tensile Strength | ~1000 MPa | ~700 MPa |
| Yield Strength | ~850 MPa | ~370 MPa | |
| 700°C | Tensile Strength | ~850 MPa | ~600 MPa |
| Yield Strength | ~750 MPa | ~350 MPa | |
| 800°C | Tensile Strength | ~500 MPa | ~450 MPa |
| Yield Strength | ~450 MPa | ~280 MPa | |
| 900°C | Tensile Strength | – | ~300 MPa |
| Yield Strength | – | ~200 MPa |
4. Physical properties of GH4169 and Inconel 625
| Property | GH4169 (718) | Inconel 625 |
|---|---|---|
| Density | 8.19 g/cm³ | 8.44 g/cm³ |
| Melting Range | 1260 – 1336°C | 1290 – 1350°C |
| Thermal Conductivity (20°C) | 11.4 W/m·K | 9.8 W/m·K |
| Thermal Conductivity (500°C) | ~16.0 W/m·K | ~15.5 W/m·K |
| Coefficient of Thermal Expansion (20-100°C) | 13.0 × 10⁻⁶/°C | 12.8 × 10⁻⁶/°C |
| Coefficient of Thermal Expansion (20-600°C) | ~14.5 × 10⁻⁶/°C | ~14.0 × 10⁻⁶/°C |
| Specific Heat (20°C) | 435 J/kg·K | 410 J/kg·K |
| Modulus of Elasticity (20°C) | ~200 GPa | ~207 GPa |
| Electrical Resistivity | 1.25 µΩ·m | 1.29 µΩ·m |
| Magnetic Properties | Slightly magnetic | Non-magnetic |
5. GH4169 and Inconel 625 Weldability and Machining: Saving You Production Time
One of the key differences affecting project schedule is post-weld heat treatment (PWHT).
GH4169 Machining: Requires a double aging treatment of 16 hours to achieve its performance specifications. This is ideal for aerospace-grade shop fabrication.
Inconel 625 Machining: Can be used directly in the weld condition. It is the material of choice for field repairs and large petrochemical piping systems where in-furnace heat treatment is not feasible.
Contact us to customize GH4169 products to fit your project dimensions
6. GH4169 vs. Inconel 625 Price/Performance Ratio Comparison (2026 Trends)
Price: The prices of both alloys are highly dependent on the prices of nickel, molybdenum, and niobium. In 2026, the price of standard Inconel rolled products will typically be between $33 and $45 per pound ($66 to $90 per kilogram), with lower prices sometimes available in the Chinese market. GH4169 will generally be priced similarly to or slightly lower than Inconel 625, depending on the sourcing channel.
Performance Highlights:
Choose GH4169 for high-performance strength at a competitive price: It offers higher strength and hardness at high temperatures, especially up to 650°C.
Choose Inconel 625 for high-performance corrosion resistance at a competitive price: It offers excellent resistance to pitting and crevice corrosion, and generally provides better long-term durability in marine or harsh chemical environments.
Contact us now for the latest export price of GH4169 in 2026
7. Cost Comparison Table of GH4169 and Inconel 625
| Cost Factor | GH4169 (Alloy 718) | Inconel 625 (Alloy 625) | Commercial Insight for Buyers |
| Raw Material Price | **~ 8.0 - 10.0** | **~ 7.0 - 9.0** | GH4169 is usually 10-15% more expensive per kg due to higher Niobium (Nb) content. |
| Heat Treatment Cost | High | Low | GH4169 requires a 16-hour double-aging cycle; 625 only needs solution annealing. |
| Machining Difficulty | Extreme | High | GH4169 work-hardens faster; tool consumption is 20-30% higher than for 625. |
| Welding & Rework | Moderate | Lowest | 625 is "Weld-and-Go"; 718 requires post-weld aging to reach full strength. |
| Lead Time | Standard | Shorter | 625 has a wider supply chain; 718 often involves longer vacuum melting queues. |
Why should you source G4169 from a reliable Gnee Alloy wholesale supplier?
As a Tier-1 Supplier specializing in both 718 and 625 materials, we provide:
✅️Massive Bulk Inventory: Seamless tubes, bars, and sheets In Stock for immediate dispatch.
✅️Bulk Discounts: Tiered pricing models to support your large-scale infrastructure projects.
✅️Total Traceability: Full EN 10204 3.1 MTC documentation provided with every heat number.
✅️Custom Fabrication: Precision cutting, centerless grinding (h8-h11), and custom bending services.
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 always "Better" than Inconel 625?
A: No. "Better" is environment-dependent. If your application involves high rotation or pressure at 650°C, GH4169 is better. If your system handles seawater or phosphoric acid with low pressure, Inconel 625 is better and more durable.
Q2: Can I use Inconel 625 for high-pressure fuel lines?
A: Only if the pressure and vibration are low. For safety-critical turbine fuel systems, GH4169 is the global standard due to its superior vibration fatigue resistance.
Q3: Which alloy has a shorter lead time?
A: Inconel 625 typically has a shorter overall lead time because it doesn't require the aging heat treatment phase. However, we maintain an inventory of pre-aged GH4169 bars for immediate high-strength use.
Q4: Do you offer trial orders for small batch fabrication?
A: Absolutely. We support prototype development and offer Flexible MOQs for both GH4169 and Inconel 625 tubing and bars.
