ASTM A182 F5 Flanges

ASTM A182 F5 flanges shall be manufactured by a forging process furnished in Class 75, 150, 300, 400, 600, 900, 1500, 2500 in accordance with ASME B16.5 and ASME B16.47 (Series A & Series B). Grade F5 of ASTM A182 is a typical Cr-Mo heat resistant alloy steel with nominal chemical composition of 5Cr-0.5Mo and UNS number of K41545.

Applications & Heat Treatments

The ASTM A182 F5 steel has good resistance to corrosion and erosion. Flanges made from ASTM A182 F5 can be used at the temperature up to 1200°F [650°C]. They are widely used in petroleum cracking process, fertilizer production piping, coking unit, as well as power plant steam piping. The flanges can be furnished in annealing or normalizing + tempering conditions. If annealing is applied, the forged flanges shall be annealed at a temperature no less than 1750°F [955°C] for at least 60 minutes and cooled in furnace. If normalizing + tempering are applied, the forged flanges shall be soaked at a temperature no less than 1750°F [955°C] for 2 hours and air cooled. Subsequent tempering temperature shall be no less than 1250°F [675°C].

Chemical Composition Requirements

Mechanical Properties

Pressure-Temperature Ratings

Both ASME B16.5 and ASME B16.47 has stipulated pressure-temperature ratings for ASTM A182 F5 steel, which are maximum allowable working gauge pressures in psi units at the temperature in degrees Fahrenheit. The data sheet is divided by Classes: ASME B16.5 flanges are available in Class 150, 300, 400, 600, 900, 1500, 2500; ASME B16.47 Series A are available in Classes 150, 300, 400, 600, 900; and ASME B16.47 Series B are available in Classes 75, 150, 300, 400, 600, 900.