The most notable features of Inconel 718 are its exceptional high-temperature strength, superior corrosion resistance, and excellent weldability.

1. Key advantages of Inconel 718 valves manufactured by Freeman Valve:

1.1 Outstanding comprehensive mechanical properties of Inconel 718 valves manufactured by Freeman Valve:

After solution treatment and aging heat treatment, Inconel 718 valves exhibit outstanding comprehensive mechanical properties (-253℃～650℃), possessing excellent yield strength, creep resistance, endurance, and excellent resistance to thermomechanical fatigue and low-cycle fatigue.

1.2 Excellent cryogenic toughness of Inconel 718 valves manufactured by Freeman Valve:

Inconel 718 valves do not exhibit brittleness at 253℃ (liquid hydrogen temperature range), retaining good plasticity.

1.3 Freeman Valve's Inconel 718 valves possess excellent corrosion resistance and oxidation resistance:

Inconel 718 valves are resistant to corrosion from seawater, chloride ions, H₂S, CO₂, and acidic oil and gas media; furthermore, Inconel 718 resists stress corrosion cracking; and its oxidation resistance remains stable at medium temperatures.

1.4 Freeman Valve's Inconel 718 valves exhibit excellent weldability.

2. Precautions for using Inconel 718 valves:

2.1 Long-term use at temperatures above 700℃ is not recommended:

The strength and creep performance of Inconel 718 valves rapidly decline at temperatures above 700℃. Therefore, we recommend keeping the long-term stable operating temperature below 650℃.

2.2 Limited Resistance to Strong Oxidation and High-Temperature Sulfidation: Inconel 718 valves exhibit less resistance to sulfidation corrosion than some high-cobalt-nickel-based alloys in sulfur-containing gas environments above 700℃.

3. Key Application Areas of Inconel 718 Valves:

3.1 Freeman Valve's Inconel 718 valves are widely used in cryogenic pipelines, such as those for liquid oxygen and liquid hydrogen media.

3.2 Freeman Valve's Inconel 718 valves are widely used in the power generation sector, such as steam generator pipelines, high-temperature and high-pressure water corrosion resistant pipelines, and pressurized water reactor nuclear power plants (nuclear radiation irradiation).

3.3 Freeman Valve's Inconel 718 valves are widely used in the oil and deep-sea oil and gas sector (NACE MR0175 operating condition), such as downhole safety valves and subsea valves; suitable for high-temperature and high-pressure corrosive environments where H₂S, CO₂, and chloride ions coexist.

3.4 Freeman Valve's Inconel 718 valves are widely used in the petrochemical industry, such as in high-temperature and high-pressure reactors, hydrogenation units, and special high-temperature valves.

4. Selection Tips:

4.1 Recommended choice: Inconel 718 valves are suitable for heavy-duty components requiring welding and operating between -253°C and 650°C, while also considering strength and corrosion resistance.

4.2 Not recommended choice: Inconel 718 valves are not suitable for applications with continuous operating temperatures above 650°C, or for applications requiring only strong corrosion and low strength. Inconel 625 valves may be considered instead.