Duplex Steel Products Manufacturer & Supplier in India

Solitaire Overseas is a manufacturer & supplier with a good reputation in providing high quality Duplex Steel Products. We are offering duplex steel pipes and tubes, fittings, flanges, sheet plates, and round bars, which are made of high-grade duplex steel. It is important to note that we also offer grades of S31803 and S32205 duplex steel, which are of different requirements in the industry. As a manufacturer and supplier of quality duplex steel products, Solitaire Overseas presents a good choice of products in various applications within the global steel industry.

Being one of the major manufacturers in India, we make sure that our duplex steel products have the best blend of high strength and non corrosiveness. Duplex stainless steels contain a mixed microstructure of austenite and ferrite, and it is twice as strong as ordinary austenitic stainless steels. Our production process adheres to international standards, ensuring that every component delivers peak performance in harsh chemical and marine environments.

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Duplex Steel Products Lists

Duplex Steel Pipes & Tubes

Duplex Steel UNS S31803 Pipes & Tubes

Duplex Steel UNS S32205 Pipes & Tubes

Duplex Steel Fittings

Duplex Steel Flanges

Duplex Steel Specifications

Feature	Specification Details
Material Type	Duplex Stainless Steel (Austenitic-Ferritic)
Grades	UNS S31803 (Standard Duplex), UNS S32205 (Enhanced Duplex)
Product Forms	Pipes, Tubes, Flanges, Fittings, Plates, Round Bars
Compliance Standards	ASTM (A790, A789, A815, A182), ASME, EN, DIN, UNS
Manufacturing Process	Seamless (Hot Finished/Cold Drawn) or Welded (ERW/EFW)

Duplex Steel Chemical Composition

Grade	Ni (%)	Cr (%)	Mo (%)	C (%)	N (%)
UNS S31803	4.5 – 6.5	21.0 – 23.0	2.5 – 3.5	0.030 max	0.08 – 0.20
UNS S32205	4.5 – 6.5	22.0 – 23.0	3.0 – 3.5	0.030 max	0.14 – 0.20

Duplex Steel Mechanical Properties

Grade	Yield Strength (MPa)	Tensile Strength (MPa)	Elongation
Duplex 2205	≥ 450	≥ 620	≥ 25
Duplex 1803	≥ 450	≥ 620	≥ 25

Duplex Steel Applications

Due to its high localized corrosion resistance and mechanical strength, Duplex steel is used in:

Chemical Processing: Transport of organic and inorganic acids.
Oil and Gas: Downhole tubing, subsea pipelines, and heat exchangers.
Marine: Propeller shafts, rudders, and desalination plants.
Pulp and Paper: Digesters and bleaching plants.

Frequently Asked Questions About Duplex Steel Products

What is duplex steel used for?

Duplex steel is used in corrosive and high-strength applications such as offshore platforms, heat exchangers, and chemical processing plants.

What is the main difference between S31803 and S32205?

S32205 is a high-nitrogen version of S31803. It offers higher corrosion resistance and strength due to a strictly controlled chemical range (higher minimums for Cr, Mo, and N).

Why use Duplex Steel instead of 316 Stainless Steel?

Duplex steel provides nearly double the yield strength and significantly better resistance to stress corrosion cracking and pitting in chloride environments compared to 316.

Is Duplex steel magnetic?

Yes, because of its 50% ferritic structure, Duplex stainless steels are magnetic, unlike common austenitic grades like 304 or 316.