ASME B16.5 ASTM B564 Inconel Alloy 718 N07718 Weld Neck Flange
We are the professional manufacturer of ASME B16.5 ASTM B564 Inconel Alloy 718 N07718 Weld Neck Flange in China.
N07718 is the UNS (Unified Numbering System) designation for Inconel 718, a high-strength, corrosion-resistant nickel-based alloy. It is widely used in high-temperature and high-stress environments due to its excellent mechanical properties and resistance to oxidation and corrosion.
The alloy has high strength and creep rupture properties up from cryogenic temperatures to 1300° F, along with corrosion resistance and weldability with resistance to cracking. Nickel Alloy 718 has good resistance to oxidation and corrosion at temperatures and atmospheres in jet engine and gas turbine operations. It is also corrosion resistant to acids, sea water and sour oil and/or gas.
ASTM B564 is a standard specification from ASTM International for wrought nickel alloy and nickel-based alloy forgings, including flanges, fittings, valves, and similar components. This standard applies to materials used in high-temperature and corrosive environments, such as chemical processing, oil and gas, and power generation industries.
INCONEL® alloy 718
INCONEL® alloy 718 is a nickel-based age-hardenable alloy that possesses high strength at elevated temperatures.
Chemical composition of Inconel 718
| Composition | UNS N07718 % |
| Nickel | 50.00 – 55.00 |
| Iron | Balance |
| Chromium | 17.00 – 21.00 |
| Niobium + Tantalum | 4.75 – 5.50 |
| Molybdenum | 2.80 – 1.15 |
| Titanium | 0.65 – 1.15 |
| Aluminum | 0.20 – 0.80 |
Inconel 718 Flanges
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- Made from Inconel 718, offering superior resistance to oxidation and corrosion, especially in chloride and oxidizing environments.
- Maintains strength and toughness at temperatures up to 700°C (1292°F).
- Types of Flanges
- Weld Neck Flange (WNF): Provides a secure, high-strength connection for critical applications.
- Slip-On Flange (SOF): Easier to install but less robust than weld neck.
- Blind Flange: Used to close the end of a pipe or a vessel.
- Socket Weld Flange (SWF): For smaller pipes with high-pressure requirements.
- Threaded Flange: Screwed onto pipes for low-pressure systems.
- Lap Joint Flange (LJF): Used with stub ends for frequent dismantling.
- Standards and Dimensions
- Compliant with standards ASME B16.5, ASME B16.47, and API 6A.
- Available in pressure classes from 150# to 2500#.
N07718 Flange Applications
- Oil and Gas Industry
- Subsea pipelines and equipment.
- High-pressure wellhead systems.
- Aerospace
- Jet engine and rocket systems where extreme conditions are encountered.
- Power Generation
- Flanges in turbines and heat exchangers operating under high temperatures.
- Chemical Processing
- Reactors and piping systems handling aggressive chemicals.
