ASTM B366 Inconel 718 Fittings: The Ideal Choice for Versatile Applications
ASTM B366 Inconel 718 Fittings are essential components widely used in industries that demand high strength, corrosion resistance, and the ability to withstand extreme temperatures. These fittings are made from Inconel 718, a nickel-chromium alloy, and adhere to the ASTM B366 standard, which ensures they meet stringent quality and performance requirements. In this article, we will dive deep into what ASTM B366 Inconel 718 fittings are, their properties, and advantages, and why they are preferred in various industries.
What is ASTM B366 Inconel 718 Fittings?
ASTM B366 is a standard specification that covers wrought nickel and nickel alloy fittings, including Inconel 718. The specification ensures that these fittings are manufactured to meet the necessary mechanical and chemical property standards, providing reliable performance in critical applications. Inconel 718, an age-hardenable nickel-chromium alloy, is known for its remarkable resistance to corrosion, oxidation, and high-temperature environments. The ASTM B366 Inconel 718 fittings are used to connect sections of piping or tubing in a way that ensures strength and stability under harsh conditions.
Inconel 718 fittings produced according to the ASTM B366 standard are designed to deliver exceptional performance in environments where other materials would fail. These fittings are crucial in industries such as aerospace, power generation, chemical processing, oil and gas, and marine engineering due to their durability and resistance to various stresses.
Properties of ASTM B366 718 Inconel Fittings
The properties of ASTM B366 718 Inconel fittings make them ideal for a wide range of demanding applications. These properties include:
- High-Temperature Strength: Inconel 718 can maintain its strength and structure in temperatures as high as 1300°F (704°C). This makes it perfect for applications in high-heat environments, such as gas turbines and exhaust systems.
- Corrosion Resistance: One of the primary reasons for using Inconel 718 fittings ASTM B366 is their excellent resistance to corrosion. They can withstand exposure to both oxidation and reducing environments, which is crucial for applications in harsh chemical and marine environments.
- Oxidation Resistance: The high chromium content in Inconel 718 makes it highly resistant to oxidation, even at elevated temperatures. This property ensures that the fittings will not degrade in oxygen-rich environments, providing long-term durability.
- Cryogenic Properties: Inconel 718 fittings maintain their toughness and strength at very low temperatures, making them suitable for applications that operate in sub-zero environments, such as cryogenic storage systems.
- Weldability: These fittings are highly weldable, making them easier to install and integrate into piping systems. The ability to join the fittings without sacrificing mechanical integrity is a significant advantage.
- Creep and Fatigue Resistance: ASTM B366 Inconel 718 fittings offer outstanding resistance to creep and fatigue, meaning they can endure prolonged exposure to high stress and pressure without deformation or failure.
- Chemical Compatibility: Inconel 718 is highly resistant to acidic and alkaline chemicals, ensuring that the fittings remain intact even in aggressive chemical processing environments.
Advantages of ASTM B366 718 Inconel Fittings
There are several reasons why industries choose ASTM B366 718 Inconel fittings over other materials. Below are some of the key advantages:
- Longevity in Harsh Environments: Due to their superior resistance to oxidation, corrosion, and high temperatures, Inconel ASTM B366 fittings have a much longer lifespan in harsh environments compared to other materials such as stainless steel or carbon steel. This means fewer replacements, reduced maintenance costs, and longer operational life.
- Versatility in Applications: 718 Inconel fittings are used in a broad range of applications, from aerospace to chemical processing. This versatility is due to the material’s ability to withstand both extreme heat and cold, as well as its resistance to various forms of corrosion.
- Strength and Durability: The high strength-to-weight ratio of B366 Inconel fittings makes them ideal for high-pressure and high-stress environments. They can maintain their structural integrity under significant loads and extreme operating conditions, providing unparalleled reliability.
- Ease of Fabrication and Welding: Unlike some other high-strength materials, ASTM B366 Inconel 718 fittings are relatively easy to fabricate and weld. This makes them a practical choice for use in large systems where fittings may need to be customized or welded on-site.
- Cost Efficiency in the Long Run: While the initial cost of Inconel 718 fittings may be higher than other materials, their longevity and durability in harsh conditions often lead to lower overall costs. This is because the fittings require fewer replacements and less maintenance, making them a cost-effective solution over time.
- Non-Magnetic: Inconel 718 is non-magnetic, which is beneficial in applications where magnetism could interfere with operations, such as in sensitive electronic environments or medical equipment.
Schedule and Size Chart
| NPS (Nominal Pipe Size) | OD (Outside Diameter) | Wall Thickness (Sch 10) | Wall Thickness (Sch 40) | Wall Thickness (Sch 80) | Wall Thickness (Sch 160) |
| 1/2 | 0.840 | 0.083 | 0.109 | 0.147 | 0.187 |
| 3/4 | 1.050 | 0.083 | 0.113 | 0.154 | 0.218 |
| 1 | 1.315 | 0.109 | 0.133 | 0.179 | 0.250 |
| 1-1/2 | 1.900 | 0.109 | 0.145 | 0.200 | 0.281 |
| 2 | 2.375 | 0.109 | 0.154 | 0.218 | 0.344 |
| 2-1/2 | 2.875 | 0.120 | 0.203 | 0.276 | 0.375 |
| 3 | 3.500 | 0.120 | 0.216 | 0.300 | 0.438 |
| 4 | 4.500 | 0.120 | 0.237 | 0.337 | 0.531 |
| 6 | 6.625 | 0.134 | 0.280 | 0.432 | 0.718 |
Mechanical Properties Chart
| Property | Value |
| Tensile Strength | 135 ksi (930 MPa) |
| Yield Strength (0.2% offset) | 70 ksi (480 MPa) |
| Elongation | 30% (min) |
| Hardness | 330 HB |
| Modulus of Elasticity | 211 GPa |
| Poisson’s Ratio | 0.29 |
Specifications Chart
| Standard | Description |
| ASTM B366 | Standard for wrought nickel alloy fittings |
| ASME SB366 | Boiler and Pressure Vessel Code specification |
| NACE MR0175 | Standard for sour gas applications |
| ANSI/ASME B16.9 | Factory-made wrought buttweld fittings |
| ANSI/ASME B16.5 | Pipe flanges and flanged fittings |
| MSS SP-43 | Standard for stainless steel and nickel alloy buttweld fittings |
Chemical Composition Chart
| Element | Composition (%) |
| Nickel (Ni) | 50.0 – 55.0 |
| Chromium (Cr) | 17.0 – 21.0 |
| Iron (Fe) | Balance |
| Molybdenum (Mo) | 2.80 – 3.30 |
| Columbium (Nb) | 4.75 – 5.50 |
| Titanium (Ti) | 0.65 – 1.15 |
| Aluminum (Al) | 0.20 – 0.80 |
| Cobalt (Co) | 1.00 max |
| Manganese (Mn) | 0.35 max |
| Silicon (Si) | 0.35 max |
| Carbon (C) | 0.08 max |
| Sulfur (S) | 0.015 max |
| Phosphorus (P) | 0.015 max |
Physical Properties Chart
| Property | Value |
| Density | 8.19 g/cm³ |
| Melting Point | 1260-1340°C (2300-2444°F) |
| Thermal Conductivity | 11.4 W/m·K at 21°C |
| Specific Heat Capacity | 435 J/kg·K |
| Electrical Resistivity | 1.29 µΩ·m at 20°C |
| Coefficient of Expansion | 13.0 µm/m°C at 20-100°C |
Applications Chart
| Industry | Applications |
| Aerospace | Jet engines, gas turbine components, rocket motors, aerospace fasteners |
| Chemical Processing | Heat exchangers, reaction vessels, piping systems |
| Power Generation | Gas turbines, nuclear reactors, steam generators |
| Oil & Gas | Offshore oil drilling equipment, refinery components, subsea piping |
| Marine Engineering | Submarine systems, seawater applications |
| Automotive | Turbocharger systems, exhaust valves |
| Industrial Gas Turbines | Combustion chambers, transition ducts, rotor blades |
Why Choose ASC LLP for ASTM B366 Inconel 718 Fittings?
When you choose ASC LLP as your supplier of ASTM B366 Inconel 718 fittings, you can be assured of:
- Quality Assurance: All of our products undergo rigorous quality control to ensure they meet ASTM standards and your exact specifications.
- Competitive Pricing: We offer competitive pricing on all of our B366 Inconel fittings, providing excellent value for high-quality materials.
- Global Shipping: Whether you are located in the Americas, Europe, Asia, or anywhere else, we provide fast and reliable shipping to ensure that your fittings arrive on time.
- Technical Support: Our team of experts is available to provide technical support and advice to help you select the right fittings for your specific needs.
Inconel 718 fittings offer unparalleled strength, corrosion resistance, and durability, making them the ideal choice for demanding applications across various industries. Whether you are looking for fittings for aerospace, chemical processing, power generation, or marine engineering, Inconel 718 provides a reliable and long-lasting solution. As one of the top B366 Inconel fittings exporters and suppliers, ASC LLP is committed to providing high-quality products and exceptional service to meet all your project needs.
Global Reach
Amardeep Steel Centre boasts a robust global presence, committed to delivering unparalleled service and quality to clients around the world. Our dedication to prompt delivery and exceptional customer care sets us apart in the industry. Major corporations across the USA, Europe, Asia, and other regions place their trust in our high-quality ASTM B366 Inconel 718 Fittings. This widespread trust underscores our reputation for reliability and excellence. By consistently meeting and exceeding the expectations of our international clientele, we continue to solidify our position as a leader in the global steel market.
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