ASTM B564 N06625 Inconel 625 Nickel Alloy Steel Forged Flange B16.5

ASTM B564 N06625 Inconel 625 Nickel Alloy Steel Forged Flange B16.5

ASTM B564 is a material standard developed by the American Society for Testing and Materials. It specifies the requirements for the chemical composition, mechanical properties, heat treatment, testing methods, and dimensional tolerances of nickel alloy forgings (including flanges, fittings, valve parts, etc.). N06625 is the UNS designation, referring to a specific nickel based high-temperature alloy. Its more well-known commercial name is Inconel 625.

ASTM B564 N06625 Nickel Alloy Steel Forged Flange Chemical Composition

ASTM B564 N06625 nickel alloy steel forged flange is often used to manufacture flange for harsh operating environments, mainly due to its excellent comprehensive performance:

1.Excellent corrosion resistance:

• Resistance to pitting and crevice corrosion: ASTM B564 N06625 nickel alloy steel flange exhibits excellent performance in chloride containing environments such as seawater, salt spray, and chemical treatment media, thanks to its high molybdenum content.
• Oxidation and carburizing resistance: ASTM B564 N06625 nickel alloy steel flange has good stability in high temperature air and carbon containing environments.
• Resistant to various acids and salts: ASTM B564 N06625 nickel alloy steel flange has good resistance to nitric acid, phosphoric acid, sulfuric acid (at moderate concentrations and temperatures), organic acids, and various salt solutions (such as chlorides and sulfates).
• Stress Corrosion Cracking Resistance: ASTM B564 N06625 nickel alloy steel flange exhibits excellent resistance to SCC in aqueous solutions containing chlorides.

2.Excellent high-temperature strength: ASTM B564 N06625 nickel alloy steel flanges can maintain high strength and good creep resistance at high temperatures (up to approximately 1000 ° C/1800 ° F), mainly due to the solid solution strengthening effect and the strengthening phase formed by niobium and molybdenum

3.Good low-temperature toughness: ASTM B564 N06625 alloy flanges can maintain good mechanical properties in low-temperature environments and are suitable for low-temperature applications (such as LNG).

4.Excellent fatigue strength and creep resistance: ASTM B564 N06625 alloy flanges exhibit stable performance under cyclic loading and long-term high-temperature stress.

5.Good weldability and formability: Although ASTM B564 N06625 alloy flanges belong to high-strength alloys, they have good weldability and can be processed by cold and hot forming (although requiring greater force than austenitic stainless steel).

Processing and Manufacturing ASTM B564 N06625 Nickel Alloy Steel Forged Flanges:

• Forging: ASTM B564 N06625 alloy flanges require manufacturing through forging processes to achieve a denser microstructure and better mechanical properties.
• Heat treatment: ASTM B564 N06625 alloy flanges are typically required to be used in a solution annealed state. The heat treatment process (temperature, time, cooling method) must be strictly executed in accordance with the standards.
• Non destructive testing: ASTM B564 standard typically requires ultrasonic testing (UT) or liquid penetrant testing (PT) to ensure that there are no defects inside and on the surface of forgings.

ASTM B564 N06625 Nickel Alloy Steel Forged Flange Application:

• Ocean and seawater desalination: seawater pipeline system, heat exchanger connection.

• Chemical processing industry: connection of medium treatment equipment, reactors, heat exchangers, and pipeline systems for strong acids (such as sulfuric acid and hydrochloric acid) and strong bases.
• Oil and gas: downhole tools, wellhead equipment, Christmas trees, and subsea pipeline systems for high sulfur (H ₂ S) and high chlorine oil and gas wells; Treatment equipment for highly corrosive process fluids (such as sulfur-containing crude oil and acidic water) in refineries.

• Aerospace: engine nacelle, exhaust system related components.

• Nuclear power: equipment for handling nuclear waste.