Customized Gh4169 vs Gh4141 High Temperature Alloy Bar
Customized Gh4169 vs Gh4141 High Temperature Alloy Bar
Custom-made GH4169 and GH4141 are both high-performance nickel-based precipitation-hardening superalloy bars widely used in aerospace and high-temperature engineering. However, due to differences in operating temperature and strengthening mechanism, they meet different professional requirements. GH4169 is more suitable for high strength at low and medium temperatures (up to 650°C), while GH4141 is designed to provide superior strength and oxidation resistance at even higher temperatures (up to 870°C–980°C).
What is GH4169?
GH4169, also known as Inconel 718, is a nickel-chromium alloy renowned for its high-temperature strength, corrosion resistance, and excellent mechanical properties. It is widely used in industries such as aerospace, nuclear power, and oil and gas.
1. Comparison of chemical composition of GH4169 and GH4141 (wt%)
| Element | GH4169 (Inconel 718) | GH4141 (Waspaloy) | Key Difference |
|---|---|---|---|
| Nickel (Ni) | 50.0 – 55.0 | Balance (~55-60) | GH4141 higher Ni |
| Chromium (Cr) | 17.0 – 21.0 | 18.0 – 21.0 | Similar |
| Cobalt (Co) | ≤ 1.00 | 10.0 – 15.0 | GH4141 contains significant Co |
| Molybdenum (Mo) | 2.80 – 3.30 | 3.50 – 5.00 | GH4141 higher Mo |
| Iron (Fe) | Balance (~18-20) | ≤ 2.0 | GH4169 has much higher Fe |
| Niobium (Nb) | 4.75 – 5.50 | – | GH4169 unique – γ″ former |
| Titanium (Ti) | 0.65 – 1.15 | 2.75 – 3.25 | GH4141 higher Ti |
| Aluminum (Al) | 0.20 – 0.80 | 1.20 – 1.60 | GH4141 higher Al |
| Carbon (C) | ≤ 0.08 | 0.02 – 0.10 | Similar |
| Manganese (Mn) | ≤ 0.35 | ≤ 0.10 | GH4169 higher |
| Silicon (Si) | ≤ 0.35 | ≤ 0.15 | GH4169 higher |
| Phosphorus (P) | ≤ 0.015 | ≤ 0.015 | Similar |
| Sulfur (S) | ≤ 0.015 | ≤ 0.015 | Similar |
| Boron (B) | 0.002 – 0.006 | 0.003 – 0.010 | Similar |
| Zirconium (Zr) | – | 0.02 – 0.12 | GH4141 contains Zr |
| Copper (Cu) | ≤ 0.30 | ≤ 0.10 | – |
2. Comparison of room temperature mechanical properties of GH4169 and GH4141
| Property | GH4169 (Aged) | GH4141 (Aged) | Advantage |
|---|---|---|---|
| Tensile Strength, Ultimate (MPa) | ≥ 1275 (185 ksi) | ~1100 – 1200 (160-174 ksi) | GH4169 (~10-15% higher) |
| Tensile Strength, Yield (MPa) | ≥ 1035 (150 ksi) | ~800 – 900 (116-130 ksi) | GH4169 (~20-30% higher) |
| Elongation (%) | ≥ 12 | 15 – 25 | GH4141 (more ductile) |
| Reduction of Area (%) | ≥ 15 | 20 – 30 | GH4141 |
| Hardness (HRC) | 35 – 40 | 34 – 40 | Similar |
| Modulus of Elasticity (GPa) | ~200 | ~211 | Similar |
| Density (g/cm³) | 8.19 | 8.20 | Similar |
GH4169 and GH4141 Performance Applications
GH4169 High-Temperature Alloy Bars
GH4169 (equivalent to UNS NO7718) is a highly stable alloy renowned for its "excellent overall performance."
Properties: Maintains stable yield strength, creep resistance, and fatigue resistance at temperatures ranging from 650°C to 700°C.
Strengthening Mechanism: Primarily strengthened by gamma-phase precipitates, enabling it to withstand high stresses.
Customization: Can be customized using specialized manufacturing processes such as vacuum induction melting (VIM), electroslag remelting (ESR), and vacuum arc remelting (VAR).
Applications: Ideal for fasteners, turbine components, and nuclear applications due to its superior strength and fatigue resistance.
GH4141 High-Temperature Alloy Bars
GH4141 is a difficult-to-deform high-temperature alloy designed for harsher high-temperature environments.
Performance: Exhibits exceptional strength at temperatures above GH4169 (up to 870°C) and excellent oxidation resistance at temperatures up to 980°C.
Composition: Contains a high content of alloying elements designed to form a γ-phase strengthening phase.
Manufacturing Challenges: Due to its high alloy content, it is considered "difficult to deform" and requires precise machining. Hot forging is employed to prevent cracking.
Applications: Commonly used in components such as turbine blades, fasteners, and combustion chamber parts that require high structural integrity at extreme temperatures.
5. GH4169 and GH4141 Selection Guide
As a Tier 1 supplier, Gnee Alloy recommends that customers switch to GH4141 for the following high-risk applications:
If your application involves high vibration and loads strictly below 700°C, order GH4169 (718 alloy). It is the most cost-effective solution for turbine discs, engine shafts, and fasteners.
If you are designing turbine blades, nozzle baffles, combustion chamber liners, or specialized engine bolts exposed to sustained high temperatures above 750°C, upgrade to GH4141 (Rene 41). In these applications, GH4141 provides creep rupture strength that GH4169 cannot achieve.
7. Gnee Alloy GH4169 Custom Bar Service
Both alloys can be custom-made into round bars, typically supplied by Gnee Alloy, etc., with specifications such as diameter, length, and heat treatment tailored to customer requirements.
Common customization services include:
Processing: Forging, hot rolling, or cold drawing;
Inspection: Ultrasonic testing, chemical composition analysis, and third-party inspection;
Size: Diameter range from small (e.g., 4 mm) to large (e.g., 600 mm).
Contact us to customize GH4169 products to fit your project dimensions
Why choose to purchase GH4169 products from Gnee Alloy?
✅️VIM + VAR Melting: Mandatory double-vacuum refining for both grades to ensure zero internal inclusions and maximized fatigue life.
✅️Expert Heat Treatment: We provide GH4141 in specialized solution-annealed states to minimize Strain-Age Cracking during your fabrication.
✅️Total Traceability: Every order includes an EN 10204 3.1 Mill Test Certificate (MTC) and high-temperature stress-rupture logs.
✅️Wholesale Pricing: Benefit from Direct Factory Price on bulk tonnage for global energy and aerospace overhauls.
Gnee Alloy GH4169(inconel 718) 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 Alloy GH4169 Product Packing
Contact us for the latest export price quote for GH4169 Alloy
FAQ
Q1: Can I weld GH4141 as easily as GH4169?
A: No. GH4141 (Rene 41) is sensitive to Strain-Age Cracking (SAC). It requires very precise welding parameters and rapid post-weld solution treatment. We provide a specialized Fabrication SOP to all our GH4141 clients.
Q2: Is GH4141 equivalent to Rene 41 in price?
A: Generally, GH4141 is more expensive per kg due to its high Cobalt (Co) and Molybdenum (Mo) content. However, the cost of a material failure at 850°C makes GH4141 the far more economical choice in the long run.
Q3: Can GH4141 handle cryogenic temperatures?
A: While it is a high-heat specialist, it performs well at room temperature. However, for cryogenic service down to -253°C, GH4169 remains the preferred "Dominant Gene" alloy.
Q4: Do you offer custom forged bars in GH4141?
A: Yes. We offer Custom Fabrication, providing hot-forged round bars and rings tailored to your turbine nozzle guide vane blueprints.
