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Incoloy 800H / 800HT Ferrule Fittings are advanced high-performance components designed to handle elevated temperature environments where exceptional strength and oxidation resistance are required. These fittings are composed primarily of nickel, iron, and chromium, which together provide superior corrosion resistance and structural stability. They are widely used in heat exchangers, chemical plants, power generation units, and industrial furnaces. The 800H and 800HT grades are modified versions of Incoloy 800, with improved creep and rupture strength. Their unique chemical balance makes them ideal for use in high-temperature, high-pressure systems.
The Incoloy 800H and 800HT Ferrule Fittings are engineered to maintain excellent mechanical strength even after prolonged exposure to temperatures above 600°C. Both grades possess controlled carbon and aluminum-titanium content, ensuring enhanced creep resistance and metallurgical stability. These fittings are specifically designed to prevent scaling and carburization in high-temperature service conditions. Their exceptional resistance to oxidation, nitridation, and chloride stress cracking makes them a preferred choice in the petrochemical and thermal processing industries. Additionally, they offer excellent ductility and toughness for reliable long-term performance.
Manufactured with precision, Incoloy 800H / 800HT Ferrule Fittings undergo rigorous quality testing and dimensional accuracy checks to ensure leak-proof and durable connections. They are compatible with various tubing systems and are used extensively in instrumentation, hydraulic, and pneumatic applications. The fittings are available in different types including unions, elbows, tees, crosses, and caps. Each fitting is designed to provide a tight grip, ensuring efficient flow control and preventing any fluid or gas leakage. Their superior design ensures easy installation and maintenance in complex piping systems.
One of the standout features of Incoloy 800H and 800HT Ferrule Fittings is their ability to resist corrosion in aqueous and oxidizing environments. This includes resistance to sulfur, phosphoric acid, and nitric acid attack. The fittings also retain their mechanical integrity under cyclic heating and cooling operations, making them perfect for thermal power generation systems. Industries such as chemical processing, petrochemical, and oil refining rely heavily on these fittings for their durability and performance. The ferrule fitting design ensures secure tube connections without the need for welding, reducing downtime during assembly.
Incoloy 800H / 800HT Ferrule Fittings comply with international standards such as ASTM B366, ASME SB366, and DIN specifications. These fittings exhibit excellent metallurgical stability and are heat-treated to achieve the desired combination of strength and ductility. Their controlled grain size and precise alloy composition enhance their ability to withstand carburizing and oxidizing atmospheres. These properties make them ideal for use in furnace equipment, gas turbines, and superheater tubes. Their performance remains consistent even under fluctuating stress and temperature conditions, ensuring system reliability.
The superior thermal stability of Incoloy 800H and 800HT Ferrule Fittings ensures minimal deformation under high mechanical loads. Their nickel-chromium composition provides an outstanding barrier against oxidation and sulfidation. The fittings are also resistant to chloride-induced stress corrosion cracking, a common issue in many industrial applications. Moreover, the fittings are available in various surface finishes, including electropolished, passivated, and bright annealed forms. This enhances their corrosion resistance and improves their overall appearance, especially in critical process environments like refineries and power plants.
In conclusion, Incoloy 800H / 800HT Ferrule Fittings are a vital component in high-temperature systems requiring consistent mechanical integrity and corrosion protection. Their outstanding metallurgical properties, coupled with precise engineering, make them a trusted solution across multiple industries. Whether in heat exchangers, chemical plants, or gas processing units, these fittings ensure reliable performance under extreme conditions. Their adaptability, ease of installation, and long service life make them a cost-effective and dependable choice. As technology advances, Incoloy 800H and 800HT Ferrule Fittings continue to play a key role in ensuring safe and efficient system operations.
Specification Table
| Specifications | Details |
|---|---|
| Product | Incoloy 800H / 800HT Ferrule Fittings |
| Grades | Incoloy 800H (UNS N08810), Incoloy 800HT (UNS N08811) |
| Standards | ASTM B366 / ASME SB366 |
| Size Range | 1/8” OD to 2” OD (3mm to 50mm) |
| Pressure Rating | Up to 6000 PSI (Depending on Size & Wall Thickness) |
| Temperature Range | -50°C to 1100°C (-58°F to 2012°F) |
| Fitting Types | Union, Elbow, Tee, Cross, Adapter, Bulkhead, Nut, Cap, Plug, Reducer |
| Form | Double Ferrule Compression Tube Fittings |
| End Connections | Male / Female / Tube End / NPT / BSP / Metric Threads |
| Surface Finish | Bright Annealed, Pickled, Passivated, or Custom Polished |
| Manufacturing Process | Cold Formed & Precision Machined |
| Testing | Hydrostatic Test, Pneumatic Test, PMI Test, Hardness Test |
| Applications | Power Generation, Heat Exchangers, Petrochemical Plants, Furnace Equipment, Chemical Processing |
| Density | 8.0 g/cm³ |
| Melting Point | 1385°C – 1425°C (2525°F – 2600°F) |
| Features | High Strength, Excellent Creep Resistance, Oxidation Resistant, Leak-Proof Connection |
Chemical Composition (Typical ranges for SSMoly 800H 800HT)
Note: Values are typical ranges. Final composition will be confirmed on MTC provided per lot.
| Element | Incoloy 800H (%) | Incoloy 800HT (%) |
|---|---|---|
| Nickel (Ni) | 30.0 – 35.0 | 30.0 – 35.0 |
| Chromium (Cr) | 19.0 – 23.0 | 19.0 – 23.0 |
| Iron (Fe) | Balance | Balance |
| Carbon (C) | 0.05 – 0.10 | 0.06 – 0.10 |
| Manganese (Mn) | ≤ 1.50 | ≤ 1.50 |
| Silicon (Si) | ≤ 1.00 | ≤ 1.00 |
| Copper (Cu) | ≤ 0.75 | ≤ 0.75 |
| Aluminum (Al) | 0.25 – 0.60 | 0.30 – 1.20 |
| Titanium (Ti) | 0.25 – 0.60 | 0.25 – 1.20 |
| Al + Ti (Total) | 0.85 – 1.20 | 0.85 – 1.20 |
| Sulfur (S) | ≤ 0.015 | ≤ 0.015 |
Mechanical Properties (Typical)
| Property | Incoloy 800H | Incoloy 800HT |
|---|---|---|
| Tensile Strength (MPa) | 520 MPa (min) | 520 MPa (min) |
| Yield Strength 0.2% Proof (MPa) | 205 MPa (min) | 205 MPa (min) |
| Elongation (%) | ≥ 30% | ≥ 30% |
| Hardness (Brinell) | ≤ 200 HB | ≤ 200 HB |
| Melting Point (°C) | 1385 – 1425°C | 1385 – 1425°C |
| Density (g/cm³) | 8.0 | 8.0 |
| Modulus of Elasticity (GPa) | 207 GPa | 207 GPa |
| Poisson’s Ratio | 0.32 | 0.32 |
| Impact Strength | Excellent at elevated temperatures | Excellent at elevated temperatures |
| Creep Rupture Strength | High at 600–870°C | Superior due to higher Al & Ti control |
Equivalent Grades
| Standard | Incoloy 800H | Incoloy 800HT |
|---|---|---|
| UNS | N08810 | N08811 |
| WNR (Werkstoff Nr.) | 1.4958 | 1.4959 |
| ASTM Specification | ASTM B366 / SB366 | ASTM B366 / SB366 |
| ASME Specification | ASME SB366 | ASME SB366 |
| EN | NiCr20TiAl | NiCr20TiAl |
| BS | NA 15 | NA 16 |
| JIS | NCF 800H | NCF 800HT |
| GOST | XH60BT | XH60BT |
| AFNOR | Z8NC32-21 | Z8NC32-21 |
Dimension & Weight Chart (Selected common sizes)
Below is a representative chart showing outside diameter, wall thickness, inside diameter, cross-sectional area of metal and calculated weight per metre (kg/m). Values are calculated using density = 7.93 g/cm³ and are for guidance — use actual MTC values for procurement & engineering.
| Tube OD (inches) | Thread Size | Dimensions (mm) | Approx. Weight (grams) |
|---|---|---|---|
| 1/8” | 1/8” NPT | 17 x 22 | 35 |
| 1/4” | 1/4” NPT | 25 x 28 | 55 |
| 3/8” | 3/8” NPT | 28 x 33 | 80 |
| 1/2” | 1/2” NPT | 35 x 38 | 110 |
| 5/8” | 5/8” NPT | 38 x 42 | 150 |
| 3/4” | 3/4” NPT | 42 x 48 | 200 |
| 1” | 1” NPT | 48 x 56 | 280 |
| 1-1/4” | 1-1/4” NPT | 56 x 64 | 350 |
| 1-1/2” | 1-1/2” NPT | 64 x 72 | 420 |
| 2” | 2” NPT | 72 x 82 | 520 |
Types Of Incoloy 800H 800HT Ferrule Fittingss and Tubes
Stainless Steel Ferrule Fitting
Monel 400 Ferrule Fitting
Hastelloy Ferrule Fitting
Nickel Ferrule Fitting
Super Duplex Ferrule Fitting
Duplex Ferrule Fitting
Inconel 600 Ferrule Fitting
Monel K500 Ferrule Fitting
Frequently Asked Questions (FAQ)
What are Incoloy 800H / 800HT Ferrule Fittings?
Incoloy 800H / 800HT Ferrule Fittings are high-performance nickel-iron-chromium alloy fittings designed for high-temperature and high-pressure environments. They provide excellent resistance to oxidation, carburization, and chloride stress corrosion cracking, making them ideal for use in petrochemical, power generation, and heat treatment industries.
What is the difference between Incoloy 800H and 800HT?
The main difference lies in their carbon, aluminum, and titanium content. Incoloy 800HT has higher controlled amounts of aluminum and titanium, providing improved creep and rupture strength compared to Incoloy 800H, especially at elevated temperatures.
What are the key features of Incoloy 800H / 800HT Ferrule Fittings?
These fittings exhibit high mechanical strength, excellent thermal stability, superior oxidation resistance, and exceptional corrosion resistance in various chemical environments. They maintain structural integrity even after prolonged exposure to high temperatures.
In which industries are Incoloy 800H / 800HT Ferrule Fittings commonly used?
They are widely used in heat exchangers, petrochemical plants, power generation units, furnaces, superheaters, and chemical processing systems where high temperature and corrosion resistance are essential.
What are the available types of Incoloy 800H / 800HT Ferrule Fittings?
Common types include Union, Elbow, Tee, Cross, Adapter, Reducer, Cap, Plug, and Bulkhead fittings. They are available in both single and double ferrule designs for secure, leak-free tube connections.
What standards apply to Incoloy 800H / 800HT Ferrule Fittings?
These fittings are manufactured in accordance with ASTM B366 / ASME SB366 standards, and comply with international specifications like DIN, EN, and JIS standards to ensure quality and compatibility.
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