UNS S31803 Weld Neck Flanges Manufacturer & Supplier in India

Zeron Fasteners is a leading manufacturer and supplier of UNS S31803 Weld Neck Flanges for Duplex and Super Duplex applications. These flanges are engineered for excellent corrosion resistance, high strength, and long-lasting performance in aggressive environments such as offshore, marine, chemical, and industrial sectors.

UNS S31803 Weld Neck Flanges

Related Products – UNS S31803 & Duplex Steel

Chemical Composition

ElementCMnPSSiCrNiMoN
Content (%) 0.03 max 1.50 max 0.04 max 0.03 max 0.75 max 21.0 - 23.0 4.5 - 6.5 2.5 - 3.5 0.10 - 0.20

Mechanical Properties

PropertyValue
Tensile Strength75 ksi (517 MPa) min
Yield Strength30 ksi (207 MPa) min
Elongation25% min
HardnessMax 90 HRB

Available Sizes & Standards

StandardSize RangeGrade
ASME B16.5 / ASTM A1821/2" - 48"UNS S31803