Gnee duplex stainless steel Factory Supply Rich Grades & Size

Gnee is a leading ISO certified duplex steel supplier, manufacturer, exporter, manufacturer, wholesaler, distributor in China. We offer superior quality duplex and super duplex stainless steels that offer high strength, corrosion resistance, durability and are manufactured to the highest industry standards. With prompt delivery, professional technical support and competitive pricing, our alloy duplex steel is available in a variety of grades and sizes and can be customized to your exact requirements. Gnee is your reliable partner to meet your exact needs, feel free to contact us!

Hot Sale Duplex steel With Large Stock
More Stainless Duplex Steel information

Gnee duplex stainless steel or super duplex stainless steel factory has the largest inventory of stainless steel at its warehouse in Tianjin, China headquarters. It’s Widely used in oil and gas, the chemical industry, ships and other fields that require high corrosion resistance, strength and other complex environments.

Standard Types Provided:
  • SUS
  • UNS
  • ASTM
  • JIS
  • SAE
  • AISI
  • BSEN
  • DIN
  • ASME
Hot-Sell Duplex Stainless Steel Grade:
  • AISI 2205 (UNS S31803/S32205, EN 1.4462)
  • AISI 2507 (UNS S32750, EN 1.4410)
  • AISI 2304 (UNS S32304, EN 1.4362)
Duplex Stainless Steel Pipe

Seamless Pipe:
Out diameter: 5.0 ~ 203.2mm
Wall thickness: 0.5 – 20mm
Length: Single, Double Random & Cut Length

Welded Pipe:
Out diameter: 5.0 – 1219.2 mm
Wall thickness: 0.5 – 20mm
Length: Single, Double Random & Cut Length

Duplex Stainless Steel Plate

Length: 2000mm, 2440mm, 3000mm, 5800mm, 6000mm, etc
Thickness: 0.3mm – 200mm
Width: 1000mm, 1219mm, 1500mm, 1800mm, 2000mm, 2500mm, 3000mm, 3500mm, etc

Duplex Stainless Steel Bar

Diameter: 5 mm To 500 mm
Length: 100 mm To 3000 mm Long & Above

  • Polishing
  • Chemical coloring
  • Pickling
  • Physical Vapor Deposition
  • Passivation
  • Sandblasting
  • Cutting
  • Welding
  • Bevel Cut
  • Uncoiling
  • Thread
  • Punching
  • Annealed Pickling Bend
  • Surface Treatment
  • Forming
  • Bending
  • Heat Treatment
  • Non-destructive Testing
  • Bright Annealed
  • Cold Treatment
  • Hot Extruding
  • Solid Solution
Parameters Of Duplex Stainless Steel
GradeC (%)Si (%)Mn (%)P (%)S (%)Cr (%)Ni (%)Mo (%)N (%)
GradeTensile Strength (MPa)Yield Strength (MPa)Elongation (%)Hardness (Brinell)
2205620 (Min)450 (Min)25 (Min)293 (Max)
2507795 (Min)550 (Min)15 (Min)310 (Max)
2304620 (Min)400 (Min)25 (Min)290 (Max)
  • Gas And Oli
  • Chemical
  • Seawater
  • Food Processing
  • Medical Equipment
  • Construction, etc.
Why Choose Gnee Duplex Stainless Steel Company?

Gnee, as a Chinese stainless steel supplier with 15 years of history, exports to 60+ countries. We provide various shapes of stainless steel, including plates, coils, pipes, bars, and fittings. Gnee is committed to providing comprehensive stainless steel solutions, with excellent after-sales service, we support customization and ensure product quality.

In addition, our stainless steel has been successfully exported to more than 60 countries such as Singapore, Malaysia, The United Arab Emirates, Oman, Turkey, Nigeria, Egypt, Kuwait, Indonesia, Qatar, and Kenya. Many regular customers come to visit our company and factory and make multiple orders.

What‘s The Feature Of Super Duplex Stainless Steel?

Duplex stainless steel exhibits excellent resistance to corrosion, particularly in environments that are corrosive or contain chlorides. It provides superior resistance to stress corrosion cracking, pitting, and crevice corrosion compared to other stainless steel grades.

Duplex stainless steel has higher strength compared to austenitic stainless steels. It offers a good balance between tensile strength and ductility, allowing for the design of lighter and more cost-effective structures.

Duplex stainless steel possesses good toughness, enabling it to withstand impact loads and sudden temperature changes without brittle failure. This characteristic makes it suitable for applications in challenging environments.

Duplex stainless steel exhibits excellent resistance to fatigue and has a high fatigue strength, making it suitable for applications involving cyclic loading, such as structural components in offshore and marine environments.

Duplex stainless steel has good weldability, allowing for the fabrication of complex structures and components. Proper welding techniques and procedures should be followed to maintain the corrosion resistance and mechanical properties of the material.

Duplex stainless steel exhibits excellent resistance to chloride-induced stress corrosion cracking, making it suitable for applications in chloride-rich environments, such as seawater.

What Services Does Gnee Provide?

Gnee can provide the following measurement services for stainless steel:

Dimensional Measurement: Measure dimensional parameters such as length, width and thickness by measuring instruments to ensure that the stainless steel is qualified and meets the design requirements.
Surface Measurement: Measure parameters such as flatness, bumpiness and surface roughness of the stainless steel surface to help ensure that the quality and surface condition of the stainless steel meets the requirements.
Thickness Measurement: Use thickness gauges to accurately measure the thickness of the stainless steel to ensure it meets the design requirements.
Material Measurement: Use material analysis instruments to measure the chemical composition and mechanical properties of the stainless steel to ensure that the quality and properties of the stainless steel meet the requirements.
Bending And Deformation Measurements: Use tools such as bending gauges and displacement sensors to measure and monitor the degree of bending and deformation of stainless steel to ensure that it is within the allowable range.

Ask Measurement service

Gnee can customize the size and shape of your stainless steel for your specific project needs. Custom design of stainless steel is carried out by a team of professional engineers and designers. Based on the project requirements and constraints, they will use calculation and simulation tools combined with experience and technical knowledge to optimize the stainless steel design to meet the specific needs of your different projects

● Adjustment of the thickness, width and length of stainless steel based on load calculations and strength requirements for structural design.
● The shape of the stainless steel can be designed according to the demand characteristics.
● If the convenience of installation and maintenance is considered, we can also add openings and passages for easy access and operation in the design for areas that require frequent maintenance.

Ask Customized Services

Sourcing Gnee stainless steel can provide the following further processing services. We can customize to meet the specific needs of our customers for different projects.

Cutting Service: Stainless steel can be custom cut to obtain the desired shape and size according to the customer’s needs. For example, flame cutting, plasma cutting, laser cutting, etc., can cut stainless steel into desired plates, blocks, shaped pieces, etc.
Bending & Forming: Stainless steel is bent and formed by applying stress and appropriate processes to obtain the desired shape.
Welding Services: Stainless steel can be subjected to various types of welding services, including manual arc welding, gas-shielded welding, laser welding, etc.
Hole Turning And Machining: Stainless steel is turned and holes are machined through the use of machining equipment. These processes produce smooth surfaces, precise holes and threads to meet specific assembly requirements.
Surface Treatments: Surface treatments can be applied to improve the corrosion resistance and aesthetics of the stainless steel. This includes methods such as painting, hot dip galvanizing, and electroplating to add a protective layer and provide corrosion resistance.

Ask Deep Processing Services

Gnee stainless steel can provide testing and the following third-party inspection services. These third-party testing services provide independent and objective verification of stainless steel’s compliance with relevant standards and regulations.

Mechanical Property Testing: Used to determine whether the strength, toughness, ductility and other mechanical properties of stainless steel meet the specified requirements.
Chemical Composition Analysis: Quantitative determination of elements on stainless steel samples through spectral analysis, atomic absorption spectroscopy, inductive coupling and other technologies.
Corrosion Performance Test: Common corrosion performance test methods include salt spray corrosion test, acid-base corrosion test and electrochemical corrosion test.
Tensile Strength Test: Through the tensile test, the parameters such as yield strength, tensile strength and breaking strength of stainless steel during the tensile process are measured.
Non-Destructive Testing: Non-destructive testing is used to evaluate hidden defects, cracks and looseness in stainless steel materials. Common methods include ultrasonic testing, magnetic particle testing, eddy current testing, and radiographic testing.
Pressure Test: By exposing stainless steel products to a specific pressure, it is tested whether there are problems such as leakage or deformation to ensure that its pressure resistance meets the requirements.
Surface Quality Test: Used to evaluate the surface flatness, smoothness and oxide layer of stainless steel products.
Welding Performance Test: Check the appearance, mechanical properties and metallographic microstructure of the weld to ensure that the quality of the stainless steel welded joint meets the requirements.
Metallographic Inspection: Through metallographic inspection, the structure, grain size, non-metallic inclusions, etc. of stainless steel are checked to evaluate its quality and performance.

Ask Testing Services
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