Duplex Stainless Steel

Product Introduction

Duplex Stainless Steel combines the properties of austenitic and ferritic stainless steel, providing high strength together with excellent corrosion resistance. Common grades include Duplex 2205 and Super Duplex 2507, which offer strong resistance to pitting, crevice corrosion, and stress corrosion cracking. Duplex steel is suitable for demanding environments involving chlorides, seawater, chemicals, and high mechanical loads. It is widely used in oil & gas, chemical processing, marine, desalination, petrochemical, and power industries. Various product forms, dimensions, surface finishes, and processing options are available according to project requirements.

Specifications

Specification	Details
Product Type	Duplex / Super Duplex Stainless Steel
Common Grades	Duplex 2205 / Super Duplex 2507 / Other grades upon request
Material Type	Duplex Stainless Steel
Product Forms	Sheet / Plate / Coil / Pipe / Tube / Bar / Fittings / Flanges
Standard	ASTM / ASME / UNS / EN / DIN / JIS / Other applicable standards
Thickness / Size	Various Standard Sizes / Customized
Length	Standard / Customized
Surface Finish	Mill Finish / Pickled / Polished / Ground / Customized
Manufacturing Process	Hot Rolled / Cold Rolled / Forged / Seamless / Welded / Cold Drawn where applicable
Heat Treatment	According to applicable material standard
Processing	Cutting / Bending / Machining / Welding / Drilling / Customized
Customization	Grade / Product Form / Size / Length / Surface / Heat Treatment / Processing

Need a Customized Solution?

If you cannot find a duplex stainless steel for your project, please contact Queen Metal. We provide customized solutions based on your required grade, dimensions, standard, surface finish, end treatment, and application.

Send us your specifications, technical requirements, drawings, or parameter files, and our team will provide a suitable quotation and supply solution.

Email: ding@queenmetal.com

Applications & Industries

Industry	Typical Applications
Oil & Gas	Pipelines, offshore platforms, valves and pressure equipment
Chemical Processing	Process piping, heat exchangers and chemical equipment
Petrochemical	Storage tanks, process equipment and piping systems
Marine & Offshore	Seawater systems, offshore structures and marine equipment
Desalination	Desalination plants, pumps and seawater handling systems
Power Generation	Heat exchangers, cooling systems and power equipment
Pulp & Paper	Process equipment and corrosion-resistant piping
Industrial Equipment	Pressure vessels, pumps, valves and specialized components

Quality Assurance & Testing

Quality Control	Details
Material Verification	Chemical composition and material grade according to applicable standards
Dimensional Inspection	Thickness / Diameter / Width / Length / Profile Dimensions
Surface Inspection	Surface condition and finish
Mechanical Testing	Tensile Strength / Yield Strength / Elongation according to applicable standards
Hardness Testing	Available according to material grade and order requirements
PMI Testing	Positive Material Identification available upon request
Corrosion Testing	Available according to material grade and project requirements
Heat Treatment Verification	Heat treatment condition according to applicable standards
MTC	Material Test Certificate available according to order requirements
Third-Party Inspection	Available upon request

Packaging & Logistics

Item	Details
Packaging	Export-standard stainless steel packaging
Protection	Waterproof paper / Plastic protection / Protective film where applicable
Bundle Packing	Bundled according to product type and dimensions
Wooden Cases	Available according to product specifications
Surface Protection	Suitable protection according to material and surface finish
Loading	Container / Bulk shipment
MOQ	According to grade, product form, size and order requirements
Lead Time	Confirmed according to material availability, processing and order quantity

FAQS

1. What is duplex stainless steel?

Duplex stainless steel is a stainless steel family with a mixed austenitic-ferritic microstructure, combining high mechanical strength with excellent corrosion resistance.

2. What are the most common duplex stainless steel grades?

The most widely used grades include Duplex 2205 (UNS S31803/S32205) and Super Duplex 2507 (UNS S32750). Other duplex grades can also be supplied according to project requirements.

3. What is the difference between Duplex 2205 and Super Duplex 2507?

2205 provides an excellent balance of strength, corrosion resistance, and cost for many industrial applications. 2507 Super Duplex contains higher levels of alloying elements and provides enhanced resistance to pitting, crevice corrosion, and chloride environments for more demanding applications.

4. What product forms are available?

Queen Metal can supply duplex stainless steel in various forms, including sheet, plate, coil, pipe, tube, bar, fittings, and flanges, depending on the specific grade and production requirements.

5. Can duplex stainless steel products be customized?

Yes. Queen Metal can provide customized grades, product forms, dimensions, lengths, surface finishes, heat treatment, cutting, machining, welding, and other processing according to drawings and project requirements.