Duplex Steel Flanges - Manufacturer, Supplier & Exporter in India

Duplex Steel Flanges Manufacturer, Supplier & Exporter in India

Duplex Steel Flanges are renowned for their exceptional strength and corrosion resistance, making them an ideal choice for various industrial applications. These flanges are typically manufactured from Duplex Steel grades such as S31803 and S32205, which provide a unique combination of austenitic and ferritic microstructures, enhancing their mechanical properties. This dual-phase structure not only contributes to high yield strength but also improves resistance to stress corrosion cracking, making them suitable for challenging environments such as oil and gas, marine, and chemical processing industries.

At RAGNAR METALS & TUBE, we offer a comprehensive range of Duplex Steel Flanges, including those made from Stainless Steel grades like 304, 316, and 904L. Each of these grades has its own set of properties tailored for specific applications. For instance, 316 grade flanges, known for their superior resistance to pitting and crevice corrosion, are widely used in marine environments, while 304L flanges are preferred for their excellent weldability in chemical processing applications.

Additionally, our Duplex Steel Flanges are available in various sizes and forms, ensuring versatility across multiple projects. With options ranging from 1/2" NB to 24" NB for seamless flanges and up to 100" NB for welded versions, RAGNAR METALS & TUBE can cater to both standard and custom specifications. Our commitment to quality ensures that every flange meets industry standards, such as ASTM A312 and A213, providing peace of mind for our clients.

One of the standout features of Duplex Steel Flanges is their impressive mechanical properties. With tensile strength values exceeding 500 MPa and yield strength above 200 MPa, these flanges exhibit remarkable durability under pressure and temperature variations. This makes them an excellent choice for high-pressure applications, where reliability is paramount. Furthermore, the low thermal expansion coefficient of Duplex Steel contributes to their stability in fluctuating temperatures, enhancing their lifespan in demanding conditions.

Choosing Duplex Steel Flanges from RAGNAR METALS & TUBE means investing in quality and performance. Our extensive inventory includes not only Duplex and Super Duplex grades but also various Nickel Alloys and other specialty materials like Inconel and Hastelloy. This diversity allows us to meet the unique needs of various industries, from aerospace to petrochemicals, ensuring that our clients receive the optimal solution for their specific applications.

Available Grades Table

Duplex Steel Flanges	Composition	Applications
304	18% Cr, 8% Ni	General-purpose, food industry
304L	18% Cr, 8% Ni (low carbon)	Welded components, chemical industry
316	16% Cr, 10% Ni, 2% Mo	Marine, chemical processing
316L	16% Cr, 10% Ni, 2% Mo (low carbon)	Medical implants, welded structures
310	25% Cr, 20% Ni	High-temperature furnace parts
309	23% Cr, 13% Ni	Heat exchangers, high-temp service
321	18% Cr, 9% Ni, Ti	High-temperature services
347	18% Cr, 10% Ni, Nb	Welded pressure vessels
2205 (Duplex)	22% Cr, 5% Ni, 3% Mo	Oil & gas, marine applications
2507 (Super Duplex)	25% Cr, 7% Ni, 4% Mo	Aggressive chloride environments

Specifications Table

Material	Duplex Steel Flanges
Grades	304, 304L, 316, 316L, 321, 347, S31803, S32205, S32750, S32760
Standard	ASTM A312 / A213 / A269 / A358
Size Range	1/2" NB to 24" NB (Seamless), 1/2" NB to 100" NB (Welded)
Length	Single Random, Double Random & Custom Cut
Form	Round, Square, Rectangular

Chemical Properties Table

Element	304 (%)	316 (%)
Carbon (C)	0.08 max	0.08 max
Chromium (Cr)	18.0–20.0	16.0–18.0
Nickel (Ni)	8.0–10.5	10.0–14.0
Manganese (Mn)	2.0 max	2.0 max
Silicon (Si)	1.0 max	1.0 max
Phosphorus (P)	0.045 max	0.045 max
Sulfur (S)	0.030 max	0.030 max
Molybdenum (Mo)	—	2.0–3.0