Duplex Steel S31803 Flanges Manufacturer in Muscat, OMAN

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Aisha Nickel Alloys, a reputable manufacturer and supplier located in Muscat, Oman, specializes in high-quality Duplex Steel S31803 Flanges designed for tough industrial settings. These flanges are crafted to meet international standards, blending impressive strength with outstanding corrosion resistance, making them perfect for critical piping systems. Aisha Nickel Alloys prides itself on precision manufacturing, rigorous quality control, and prompt delivery, catering to the oil & gas, petrochemical, marine, and power industries. The Duplex Steel S31803 flanges from Aisha Nickel Alloys guarantee exceptional performance, longevity, and reliability in high-pressure and corrosive environments across various global projects.

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These flanges boast a well-balanced microstructure of austenite and ferrite. Their typical composition includes chromium (21–23%), nickel (4.5–6.5%), molybdenum (2.5–3.5%), and nitrogen, which enhances both strength and corrosion resistance. Mechanically, they deliver high tensile and yield strength, nearly twice that of standard austenitic stainless steels. Additionally, these flanges demonstrate excellent toughness, good weldability, and robust resistance to stress corrosion cracking, pitting, and crevice corrosion, ensuring they remain durable under high pressure and temperature conditions.

Duplex Steel S31803 Flanges Specifications

Specifications	ASTM A182 / ASME SA182
Size	1/8″ NB TO 48″ NB
Standards	ANSI/ASME B16.5, B 16.47 Series A & B, B16.48, BS4504, BS 10, EN-1092, DIN, etc.
Class / Pressure	150#, 300#, 600#, 900#, 1500#, 2500#, PN6, PN10, PN16, PN25, PN40, PN64 etc.
Standard	ANSI Flanges, ASME Flanges, BS Flanges, DIN Flanges, EN Flanges, etc.
Grades	S31803 / S32205 A182 Gr F51 / F52 / F53 / F54 / F55 / F57 / F59 / F60 / F61

Duplex Steel S31803 Flanges 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	4.50 – 6.50	0.14 – 0.20	63.72 min

Duplex Steel S31803 Flanges Mechanical Properties

Grades	Density (g/cm 3)	Density (lb/in 3)	Melting Point (°C)	Melting Point (°F)
S31803	7.805	0.285	1420 – 1465	2588 – 2669

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Largest Manufacturer and Supplier of Duplex Steel S31803 Flanges in Muscat, OMAN

At Aisha Nickel Alloys, we take pride in being the largest supplier, exporter, and manufacturer of Duplex Steel S31803 Flanges in Muscat, OMAN, providing cutting-edge solutions for all your piping needs. Our state-of-the-art production plants are strategically located in the OMAN, allowing us to maintain a vast inventory of over 16,000 tons of premium-quality materials readily available in stock. We are dedicated to delivering superior products and services, ensuring reliability and excellence for our global clientele.

Types of Duplex Steel S31803 Flanges

We offer These Products as per DIN, ISO, JIS or ANSI Standard.

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Duplex Steel S31803 Flanges Uses

Duplex Steel S31803 flanges are extensively utilized in industries that demand strength and corrosion resistance in harsh environments. You’ll find them in oil and gas pipelines, offshore platforms, petrochemical plants, desalination units, and marine systems. They’re also employed in heat exchangers, pressure vessels, chemical processing equipment, and water treatment facilities. Their capability to endure chloride-induced corrosion and heavy mechanical loads makes them ideal for sour service conditions, ensuring safe and dependable performance in essential piping systems.

Duplex Steel S31803 Flanges Manufacturer in Muscat, OMAN

Table of Contents

Duplex Steel S31803 Flanges Specifications

Duplex Steel S31803 Flanges Chemical Composition