ASTM A182 F904L is a high-alloy austenitic stainless steel weld neck flange designed for severe corrosive environments. With high nickel and molybdenum content, and added copper, it provides exceptional resistance to strong reducing acids like sulfuric acid. The Weld Neck design features a tapered hub that offers structural reinforcement and prevents stress concentration, making it a reliable choice for 300lbs pressure systems in chemical processing and pharmaceutical industries where standard 316L fails.
Technical Attributes: A182 F904L (300lbs)
Material Grade,F904L (UNS N08904) :
Standard,ASTM A182 / ASME SA182 :
Flange Type,Weld Neck (WN) :
Pressure Class,300 LBS (Class 300) :
Nickel Content,23% – 28% (High Stability) :
Chromium Content,19% – 23% :
Molybdenum Content,4% – 5% :
Copper Addition,1.0% – 2.0% (Acid Resistance) :
Carbon Content,Max 0.020% (Extra Low Carbon) :
Yield Strength,Min. 215 MPa (31 ksi) :
Tensile Strength,Min. 490 MPa (71 ksi) :
Pitting Resistance,PREN ≥ 34 :
Dimensional Spec,ASME B16.5 :
Facing Type,Raised Face (RF) :
Connection,Butt-welded transition :
Bore Profile,"Matches Pipe Schedule (e.g., SCH 40S) :"
Heat Treatment,Solution Annealing + Quenching :
Primary Industry,Phosphoric & Sulfuric Acid Plants :
Contact: Jorge Yang
Phone: +86-13588258503
E-mail: sales@fluvalve.com
Whatsapp:+86-13588258503
Add: Room 331, South Building,Building 1, No.3 Jinpeng Street, Sandun Town, Xihu District, Hangzhou City, Zhejiang Province
