In the field of high-temperature alloys, the terms "heat resistance" and "corrosion resistance" are often used interchangeably by purchasing personnel, but for engineers, they represent two distinct concepts.
Pain Point: We have witnessed equipment fail within weeks simply because purchasing personnel, prioritizing "expensive and high-strength," chose GH4169 alloy for acidic environments; or conversely, they chose Hastelloy C276 for rotating turbine components, resulting in deformation at high temperatures.
Choosing between GH4169 (equivalent to Inconel 718) tubing and Hastelloy C276 tubing hinges on prioritizing mechanical load over chemical corrosion. Failure to understand this distinction can lead to millions of dollars in downtime and safety hazards.
Click to contact us for professional material selection for GH4169
Comparison of GH4169 high-temperature resistant pipe and Hastelloy C276 steel pipe
Comparison of GH4169 high-temperature resistant pipe and Hastelloy C276 steel pipe
GH4169 and Hastelloy C276 seamless tubing are both high-performance nickel-based alloy tubing commonly used in harsh environments, but their primary functions differ. GH4169 tubing is primarily a high-temperature structural alloy designed to maintain strength at temperatures ranging from 650°C to 700°C. In contrast, Hastelloy C276 round tubing is a premium corrosion-resistant alloy tubing with exceptional corrosion resistance, capable of withstanding temperatures up to 815°C to 1038°C.
What is the composition of GH4169 alloy?
The chemical composition of GH4169 alloy was as follows: Ni 53.44, Cr 18.56, Mo 3.02, Nb 5.3, Al 0.44, Ti 1.04, C 0.026, P 0.005, S 0.001, B 0.002 and Fe bal (wt. %).
1. Comparison of key technologies of GH4169 and Hastelloy C276
| Technical Feature | GH4169 (Nickel Alloy 718) | Hastelloy C276 (Alloy C276) |
| Global Standard | AMS 5662 / ASTM B637 | ASTM B622 / UNS N10276 |
| Primary Advantage | Elite High-Temperature Strength | Ultimate Corrosion Resistance |
| Max Service Temp | 700°C (1292°F) | 400°C - 600°C (Varies by environment) |
| Chemical Foundation | Ni, Cr, Nb (Niobium), Mo | Ni, Cr, Mo (16%), W (Tungsten) |
| Yield Strength (σp0.2) | ≥ 1030 MPa | ≥ 355 MPa |
| Fabrication | Better Weldability (Delayed Aging) | Excellent general fabricability |
| Corrosion Resistance | Oxidation & Steam resistant | Resistant to Pitting & SCC |
2,Chemical composition (by weight) of GH4169 and Hastelloy C276 pipes
| Element | GH4169 (Inconel 718) | Hastelloy C-276 | Key Difference |
|---|---|---|---|
| Nickel (Ni) | 50.0 – 55.0 | 57.0 min (Balance) | Similar |
| Chromium (Cr) | 17.0 – 21.0 | 14.5 – 16.5 | GH4169 slightly higher |
| Iron (Fe) | Balance | 4.0 – 7.0 | GH4169 has much higher Fe |
| Molybdenum (Mo) | 2.80 – 3.30 | 15.0 – 17.0 | C-276 has 5x more Mo |
| Niobium (Nb) | 4.75 – 5.50 | – | GH4169 unique |
| Titanium (Ti) | 0.65 – 1.15 | – | GH4169 unique |
| Aluminum (Al) | 0.20 – 0.80 | – | GH4169 unique |
| Tungsten (W) | – | 3.0 – 4.5 | C-276 unique |
| Cobalt (Co) | ≤ 1.00 | ≤ 2.5 | Both trace |
| Carbon (C) | ≤ 0.08 | ≤ 0.01 | C-276 much lower |
| Manganese (Mn) | ≤ 0.35 | ≤ 1.0 | – |
| Silicon (Si) | ≤ 0.35 | ≤ 0.08 | – |
| Phosphorus (P) | ≤ 0.015 | ≤ 0.04 | – |
| Sulfur (S) | ≤ 0.015 | ≤ 0.03 | – |
| Boron (B) | ≤ 0.006 | – | GH4169 unique |
| Copper (Cu) | ≤ 0.30 | – | – |
| Vanadium (V) | – | ≤ 0.35 | C-276 unique |
Click to download the GH4169 alloy PDF file now
3,Performance advantages of GH4169 (Alloy 718) & hastelloy c276
GH4169 (Alloy 718): The King of High-Temperature Strength
GH4169 is a precipitation-hardened superalloy primarily designed for environments where mechanical stress is extreme. Its microstructure, strengthened by the γ′′ (Gamma Double Prime) phase, allows it to maintain its yield strength up to 700°C (1292°F).
Best For: Rotating components, high-pressure fuel lines, and turbine discs.
Key Strength: Exceptional creep-rupture strength and fatigue resistance.
Limitation: While it has good general oxidation resistance, it is not designed to handle highly concentrated acids or chlorides.
Hastelloy C276 (UNS N10276): The Ultimate Guardian Against Corrosion
Hastelloy C276 is a solid-solution strengthened alloy with a high Molybdenum (16%) and Tungsten content. It is the gold standard for resisting pitting, crevice corrosion, and stress corrosion cracking (SCC) in the most aggressive chemical media.
Best For: Flue gas desulfurization (FGD), pharmaceutical reactors, and offshore sour gas transport.
Key Strength: Unmatched resistance to ferric/cupric chlorides, hot contaminated media, and wet chlorine gas.
Limitation: It lacks the aging phases of GH4169, meaning its mechanical strength drops significantly as temperatures approach 600°C.
4. Choosing Between GH4169 and Hastelloy C276 Seamless Pipes
If you are designing aircraft engine components, gas turbines, or high-pressure springs, and the material must remain undeformed under extreme thermal and mechanical loads of 650°C to 700°C, choose GH4169 pipe.
If your piping system is used to transport hydrochloric acid, sulfuric acid, or acidic gases from oil fields, choose Hastelloy C276 pipe. In this case, chemical stability and prevention of pitting corrosion are primary considerations for ensuring industrial durability.
Contact our professionals to recommend the right alloy for your project
Why Choose Gnee as Your Nickel-Based Alloy Supplier
As a specialized manufacturer, we eliminate the substitution risk. We provide:
✅️VIM + VAR Double Melting: Ensuring ultra-high purity for both GH4169 and C276.
✅️Full Traceability: Every pipe comes with an EN 10204 3.1 Mill Test Certificate (MTC) documenting the exact heat analysis.
✅️Wholesale Inventory: Massive stock of Seamless and Welded pipes ready for Fast Global Shipping.
✅️Custom Fabrication: We offer 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 Tube Packing
Contact us for the latest export price quote for GH4169 Alloy
FAQ
Q1: Can GH4169 replace C276 in a chemical reactor?
A: Generally, NO. Unless the reactor only handles air or steam at high temperatures. In the presence of chlorides or strong acids, GH4169 will corrode much faster than C276.
Q2: Which alloy is more cost-effective?
A: This depends on the material life cycle. GH4169 is often more expensive due to complex heat treatment (Aging), but if you need strength at 700°C, it is the only viable Cost-effective Solution.
Q3: Do you provide NDT testing for these pipes?
A: Yes. All our GH4169 and C276 pipes undergo 100% Ultrasonic Testing (UT) and Eddy Current Testing (ET) to ensure Zero Defect quality.
