ASTM A182 F5 Stainless Steel Weld Neck Flange for Petrochemical Power Plants

What is ASTM A182 F5 weld neck flange?
ASTM A182 F5 weld neck flange is a high-strength, corrosion-resistant pipe component made from a chromium-molybdenum alloy steel that is specifically used in the petrochemical and power plant industries for high-temperature and high-pressure applications. It connects pipes and vessels to piping systems, with the weld neck design ensuring a strong, leak-free connection suitable for critical service environments.

 

Our ASTM A182 F5 weld neck flanges are integrally forged and subjected to normalizing and tempering or quenching and tempering heat treatment. The neck and flange have a 1:3 taper transition design to ensure uniform stress distribution during welding to pipelines. Nominal pressure ratings cover Class 150 to Class 2500, and specifications are compatible with ANSI B16.5, ASME B16.47, and other standards. Surface treatment options include anti-rust oil coating or sandblasting (Sa2.5 grade). We provide material certification (MTC), hardness test report (HB 187-241), impact test data (AKV ≥ 27J at -20°C), and third-party testing documents (such as SGS).

 

Heat Treating Requirements for F5

Grade	Heat Treat Type	Austenitizing/Solutioning Temperature, Minimum or Range, °F [°C]	Cooling Media	Tempering Temperature, Minimum or Range, °F [°C]
F5	anneal normalize and temper	1650 [900]	furnace cool	1150 [620]

 

Chemical Requirements for F5

Grade	UNS Designation	Carbon	Manganese	Phosphorus	Sulfur	Silicon	Nickel	Chromium	Molybdenum
F5	K41545	0.15	0.30 - 0.60	0.03	0.03	0.5	0.5	4.0 - 6.0	0.44 - 0.65

 

Tensile and Hardness Requirements for F5

Grade Symbol	Tensile Strength, min, ksi [MPa]	Yield Strength, min, ksi [MPa]B	Elongation in 2 in. [50 mm] or 4D, min, %	Reduction of Area, min, %	Brinell Hardness Number, HBW, unless otherwise indicated
F5	70 [485]	40 [275]	20	35	143 - 217

 

Repair Welding Requirements for F5

Grade Symbol	ElectrodesA	Recommended Preheat and Interpass Temperature Range, °F [°C]	Post Weld Heat-Treatment Temperature, Minimum or Range, °F [°C]
F5	E80XX-B6, where XX can be 15, 16, or 18	400 - 700 [205 - 370]	1250 [675]

 

If you have project requirements for ASTM A182 F5 stainless steel flanges, please feel free to place an order. GNEE has a large inventory of popular products for your selection. For detailed chemical compositions and free samples, please contact our factory immediately. We offer competitive prices and excellent service.