ASTM A182 F5 Alloy Steel Forged Welding Neck WN Flange RF B16.5
ASTM A182 F5 alloy flange is an alloy steel flange manufactured according to the ASTM A182 standard, which is developed by the American Society for Testing and Materials (ASTM) specifically for high-temperature service alloy steel and stainless steel forged flanges, valve components, bolts, bolts, and other similar forgings.
ASTM A182 F5 belongs to the low-alloy steel grade, with enhanced high-temperature strength, suitable for high-temperature applications. The main chemical components of ASTM A182 F5 alloy flanges include carbon (C), manganese (Mn), phosphorus (P), sulfur (S), silicon (Si), and chromium (Cr).
ASTM A182 Chemical Composition
| GRA. | UNS | CHEMICAL COMPOSITION % MAXIMUM |
| C | MN | P | S | SI | CR | NI | MO |
| F5 | K41545 | 0.15 | 0.30-0.60 | 0.03 | 0.03 | 0.50 | 4.0-6.0 | 0.50 | 0.44-0.65 |
| F9 | K90941 | 0.15 | 0.30-0.60 | 0.03 | 0.03 | 0.50-1.00 | 8.0-10.0 | --- | 0.90-1.10 |
ASTM A182 Alloy Steel Flange Heat Treatment
| GRA. | UNS | Tensile Strength, min, ksi [MPa] | Yield Strength, min, ksi [MPa]B | Elongation in 2 in. [50 mm] or 4D, min, % |
| F5 | K41545 | 70[485] | 40[275] | 20 |
| F9 | K90941 | 85[585] | 55 [380] | 20 |
The manufacturing process of ASTM A182 F5 alloy flange includes forging and rolling processes, which ensure the shape and dimensional accuracy of the flange. In terms of heat treatment, ASTM A182 F5 alloy flanges usually require annealing or normalizing and tempering treatment to improve their mechanical properties and corrosion resistance. Annealing: The temperature is usually not lower than 955 ° C, and then the furnace is cooled; Normalization: The temperature should not be lower than 955 ° C, followed by air cooling and tempering treatment (temperature should not be lower than 675 ° C).
Key Advantages of ASTM A182 F5 Alloy Flanges
- Excellent high-temperature strength and creep resistance
- Good high-temperature oxidation resistance
- Moderate resistance to sulfur corrosion
- Good resistance to sulfide stress corrosion cracking
- Good toughness and ductility
- Proven manufacturing and application experience
ASTM A182 Alloy Steel Flange Application:
- Petrochemical industry: In the process of petroleum refining and chemical production, high-temperature and high-pressure pipeline systems need to be able to withstand extreme working conditions. ASTM A182 F5 alloy flanges are commonly used to connect these piping systems due to their excellent high-temperature performance and corrosion resistance, ensuring stable operation of the system.
- Power industry: In the power industry, especially in thermal power plants, high-temperature steam pipeline systems are a key component. ASTM A182 F5 alloy flanges are used to connect these steam pipelines, ensuring smooth flow of steam in the pipelines while withstanding high temperature and high pressure environments.
- The nuclear energy industry: In nuclear power plants, there are extremely high requirements for materials and components to ensure safety and reliability. ASTM A182 F5 alloy flanges are also used in pipeline systems in the nuclear energy industry due to their excellent high-temperature strength and corrosion resistance.
- Paper and food processing industries: High temperature steam or hot water may be used in the process of paper and food processing. ASTM A182 F5 alloy flanges also play an important role in pipeline systems in these industries, ensuring smooth production processes.
- Ship and Ocean Engineering: In ship and ocean engineering, due to the complex environment and often accompanied by high temperatures and corrosion, there are also high requirements for flange materials. ASTM A182 F5 alloy flanges are widely used in pipeline systems of ships and marine engineering due to their excellent performance.
- Other industrial fields: In addition, ASTM A182 F5 alloy flanges can also be used in other industrial fields that require high temperature, high pressure, and corrosive environments, such as metallurgy, pharmaceuticals, etc.
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