Duplex & Super Duplex Supplier, Duplex & Super Duplex Stockist, Duplex & Super Duplex Exporter in India

Resistant Special Alloys Overseas makes it easier to purchase cost-effective, high-quality Duplex & Super Duplex Tube, Plate, Round Bar, Wire, Tubing, etc. in India. Duplex & Super Duplex is a famous choice for applications that require a high level of hygiene, such as food and beverage production and healthcare.

Our high-quality Duplex & Super Duplex products are used in steel factories, petrochemical industries, fire prevention systems, chemical industries, oil and gas industries, and other sectors. Throughout the whole supply chain, including the selection of premium Duplex & Super Duplex raw materials, processing, marking, packaging, storage, and shipment, we have a crew that ensures the quality of our Duplex & Super Duplex products and other items. We also a leading Supplier of Chromium Molybdenum Steel Supplier in India.

Types of Duplex & Super Duplex Products

Duplex & Super Duplex Specification, Grades & Size

Duplex & Super Duplex composition

The composition of duplex stainless steel varies depending on the type of duplex stainless steel alloy. Duplex stainless steels have qualities that are common to both ferritic and austenitic stainless steels. Duplex stainless steels are often stronger than ferritic stainless steels. These materials are significantly more corrosion resistant than most other grades of stainless steel in general usage, such as 316, 304, and so on. The main concept behind the development of duplex stainless steels was to create a product that was a combination of austenite and ferrite stainless steels.

Check out the Super Duplex Stainless Steel Composition. The following are some typical Hyper Duplex Stainless Steel, 22 Cr Duplex Stainless Steel, 1.4462 Duplex Stainless Steel, and Lean Duplex Stainless Steel compositions:

Duplex Stainless Steel Equivalent

• All material sourced from Western European mills and meeting leading International standards
• ASTM A240, ASME SA240, BS EN 10028-7, BS EN 10088-2 and BS EN 10088-4
• EN 10088/2, EN 10088/4 and CE Marking
• NACE MR 0175/ISO 15156 Certification
• All our stock is certified to Norsok MDS D45 with 3.2 certs
• Super Duplex Ferritic
• Austenitic Duplex Stainless Steel

Their features made them very attractive compared to equivalent Super Duplex Austenitic grades:

• higher resistance to Stress Corrosion Cracking,
• higher mechanical properties
• and lower alloy cost.

Duplex vs Super Duplex Cost

Duplex Steel Price Per Kg

Super Duplex Stainless Steel Price Per Kg

Duplex Stainless Steel Properties

Duplex stainless steel properties are that they are work hardenable and highly resistant to corrosion. Duplex stainless steel has inbuilt composition of both ferritic and austenitic stainless steels; therefore, it displays the characteristic and properties of both these steels. Due to this combination, duplex stainless steel is much tougher than the normal ferritic stainless steel or the austenitic stainless steel. Duplex stainless steel has the ability to resist cracking under stress corrosion, which is not seen in the other general types of stainless steel. The magnetic property of duplex stainless steel is uncommon in the other austenitic types of stainless steel.

Duplex Steel Grades

There are many duplex steel grades such as Duplex 2304 stainless steel, which is also referred to as lean duplex grade. 2304 duplex steel grade has high resistance to stress corrosion splitting, fine weldability, first-rate machinability, high thermal conductivity, elevated mechanical strength, etc. 2507 stainless steel super duplex grade has elevated molybdenum, chromium and nickel levels, hence it offers a tremendous resistance to pitting and general corrosion. LDX2101 Stainless Steel has the same amazing properties as the others and it is mainly used as it too shows tremendous strength, durability and cost efficiency.

Duplex stainless steel grades are the largest used stainless steel grade. Characteristic of duplex stainless steels are their high yield strength, which is twice more than standard austenitic stainless steel grades. Duplex stainless steels are in demand because of their price stability, their better resistance to corrosion, their higher strength and their lower price. There are many grades of duplex stainless steels and some of them are S32520, S32001, S31803, S32205, S32304, 4404, 2304, 4501, 4521, LDX 2101, 254 SMO, 2507 and 4301. Duplex stainless steels can very easily be differentiated from other austenitic grades of stainless steel, as they are magnet ic.

Lean duplex stainless steel grades

Super Duplex Steel Grades

Super duplex steel grades are S31200, S32760, S31260, S32900, S32550, S32950 and S32750. Super duplex stainless steel microstructure is a mixture of ferrite and austenite components. Super duplex stainless steel is a very tough and sturdy duplex steel, which is highly corrosion resistant. Because of the microstructure, super duplex stainless steel warranties a high resistance to pitting and stress corrosion cracking, compared to the other general stainless steels. The chemical composition of super duplex stainless steel has high levels of molybdenum, chromium and nickel, with some addition of nitrogen, to increase the ultimate and yield strengths.

Duplex Steel Density

Duplex steel density is 7.8 g/cm3. The Thermal Expansion of duplex stainless steel is 11 m/μm/°C. The Electrical Resistivity of duplex stainless steel is 8.12 μohm/cm. The Thermal Conductivity of duplex stainless steel is 15 W.m -1.°K-1. The Chemical Composition of duplex stainless steel is Cu is 0.5 min. and 1 max., C is 0.03 max., N is 0.24 min. and 0.35 max., P is 0.35 max., Mn is 2 max., Mo is 3 min. and 5 max., Si is 1 max., Ni is 6 min. and 8 max., Cr is 24 min. and 26 max., and S is 0.015 max.

Duplex Stainless Steel Market

The duplex stainless steel market is huge, as there is a big demand for this material, all over the globe, because of its properties. Duplex stainless steels are resistant to stress corrosion cracking. Duplex stainless steels have a metallurgy that is far more complex as compared with ferritic steels or austenitic steels. The most in demand duplex stainless steel is 2205, because of its high strength and superb resistance to corrosion. The name of grade 2205 stainless steel is derived from the fact that it contains 22% Chromium and 5% Nickel. There is a lot of marketing activity that surrounds duplex stainless steel and all the time, new grades are being declared.

India's leading Duplex Steel Suppliers offer best price on following products

• Duplex Pipe
• Duplex Tube
• Duplex Fittings
• Duplex Flanges
• Duplex Wire
• Duplex Fasteners
• Duplex Round Bar
• Duplex Plate

Summary of Duplex Characteristics

• Twice design strength of austenitic and ferritic stainless steels
• Wide range of corrosion resistance to match application
• Good toughness down to minus 80 deg C but not genuine cryogenic applications
• Particular resistance to stress corrosion cracking
• Weldable with care in thick sections
• More difficult to form and machine than austenitics
• Restricted to 300 deg C maximum 

Pren number of Duplex Stainless Steel

Pitting resistance equivalent numbers (PREN) are a theoretical way of comparing the pitting corrosion resistance of various types of stainless steels, based on their chemical compositions.