Duplex Steel S31803 Flanges Manufacturer in Riyadh, Saudi Arabia

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Ashraf Nickel Alloys stands out as a top manufacturer and supplier of Duplex Steel S31803 Flanges in Saudi Arabia. We pride ourselves on delivering flanges that are not just high-quality but also built to last, especially in critical operations. Thanks to their unique dual-phase microstructure, these flanges strike an impressive balance between strength and corrosion resistance, making them ideal for tough environments filled with chlorides and high stress. Our flanges are designed to endure extreme pressures and temperatures, ensuring they perform reliably in demanding situations. We cater to a variety of industries, including oil & gas, petrochemicals, desalination, marine, and construction, all while adhering to international standards to guarantee customer satisfaction.

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Duplex Steel S31803 Flanges are made up of a special mix of materials, including chromium (21–23%), nickel (4.5–6.5%), molybdenum (2.5–3.5%), nitrogen, manganese, and iron. This unique combination gives them exceptional resistance to stress corrosion cracking, pitting, and crevice corrosion, particularly in chloride-rich environments. On the mechanical side, they boast a tensile strength of about 620 MPa, a yield strength of 450 MPa, and an elongation of 25%. Their dual-phase structure enhances toughness, fatigue resistance, and durability, making them a reliable choice compared to standard austenitic stainless steels. These qualities make Duplex Steel S31803 flanges perfect for heavy-duty applications in Saudi Arabia’s industrial and marine sectors.

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 Riyadh, Saudi Arabia

At Ashraf Nickel Alloys, we take pride in being the largest supplier, exporter, and manufacturer of Duplex Steel S31803 Flanges in Riyadh, Saudi Arabia, providing cutting-edge solutions for all your piping needs. Our state-of-the-art production plants are strategically located in the Saudi Arabia, 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 widely used in industries requiring high strength and corrosion resistance. They are essential in the chemical processing and petrochemical sectors, particularly for handling acidic and corrosive fluids. These flanges are also used in the oil and gas industry for pipelines and offshore platforms, where resistance to chloride stress corrosion is crucial. Additionally, they find applications in marine environments, desalination plants, and power generation, where their durability and toughness are vital for long-term performance.

Duplex Steel S31803 Flanges Manufacturer in Riyadh, Saudi Arabia

Table of Contents

Duplex Steel S31803 Flanges Specifications

Duplex Steel S31803 Flanges Chemical Composition