Duplex Steel S31803 Flanges

Duplex Steel S31803 Flanges

Arrow Piping Solutions is a leading manufacturer and supplier of Duplex Steel S31803 Flanges in India. We manufacture various types of flanges including Duplex Steel S31803 Threaded Flanges, ASTM A182 SAF 2205 Pipe Flanges, Duplex Steel S31803 SORF Flanges, Socket Weld Flanges, Lap Joint Flanges, Spectacle Blind Flanges, and Plate Flanges using high-quality raw materials to ensure durability and corrosion resistance.

Duplex S31803 contains around 22% chromium, 3% molybdenum, and 5–6% nickel, offering excellent resistance to stress corrosion cracking and high mechanical strength. Duplex S31803, a nitrogen-enhanced version of S31803, improves corrosion resistance and weldability, making it ideal for marine, chemical, and power generation industries.

We manufacture Duplex Steel Flanges under ASTM A182 / ASME SA182 specifications with precise tolerances and as per ANSI, DIN, BS, JIS, and EN standards. Our offerings include standard and customized dimensions, pressure classes, flange face types, and surface finishes to match various application needs.

Specifications of Duplex Steel S31803 Flanges

• Specification: ASTM A182 / ASME SA182
• Size Range: 1/2" (15 NB) to 48" (1200 NB)
• Pressure Class: 150#, 300#, 600#, 900#, 1500#, 2500#, PN6 to PN64
• Flange Face Type: FF, RF, RTJ
• Standards: ANSI B16.5, B16.47 Series A & B, B16.48, BS4504, DIN, EN-1092

Chemical Composition

Grade	C	Mn	Si	P	S	Cr	Mo	Ni	N	Fe
S31803	0.030 max	2.00 max	1.00 max	0.030 max	0.020 max	22.0–23.0	3.0–3.5	4.5–6.5	0.14–0.20	Bal
S32205	0.030 max	2.00 max	1.00 max	0.030 max	0.020 max	21.0–23.0	2.5–3.5	4.5–6.5	0.14–0.20	Bal

Mechanical Properties

Grade	Density (g/cm³)	Melting Point (°C)	Melting Point (°F)
S31803	7.805	1420–1465	2588–2669

Stock Sizes and Dimensions

Arrow Piping Solutions offers flanges conforming to ASME, ASTM, and API standards with varying bolt circle diameters, number of bolts, bolt hole diameters, and flange diameters. Customization is available on request.

Price List (FOB)

Product	Price
S31803 Flanges	Contact us for price.
S31803 Pipe Flanges	Contact us for price.
S31803 Weld Neck Flanges	Contact us for price.
ASTM A182 S31803 Plate Flanges	Contact us for price.
Duplex S31803 Pipe Flanges	Contact us for price.