Duplex Stainless Steel Coil

duplex Stainless Steel Coil

Duplex stainless steel coil is a special stainless steel product with excellent mechanical properties and corrosion resistance. It is composed of two crystal structures: austenite and ferrite. It usually has a chromium content of 25% to 30% and a nickel content of about 4% to 7%. It also contains higher molybdenum, copper and Nitrogen and other alloying elements.

Compared with traditional austenitic stainless steel, duplex stainless steel coils have higher yield strength and tensile strength, giving them greater load-bearing capacity in important structural applications. At the same time, it also has excellent corrosion resistance and stress corrosion cracking resistance, giving it excellent durability in harsh environments.

  • Hot-Selling Grades: 2205/2507/2304/904L
  • Duplex Stainless Coil, Strip, Foils, Sheet, etc.
  • Service: support customization/cutting/welding/third-party testing
  • Free samples, minimum order is 1 piece, welcome to consult!
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duplex Stainless Steel coil Supplier Provides Rich Grade/Size

Gnee is a leading ISO certified Duplex Stainless Steel Coils supplier, manufacturer, exporter, manufacturer, wholesaler, distributor in China. We offer superior quality Duplex Stainless Coils and manufactured as per the highest industry standards. With prompt delivery, professional technical support and competitive pricing, our Stainless Coils are available in a variety of grades and sizes and can be customized to your exact requirements. Gnee is your reliable partner to meet your stainless steel strips needs, welcome to contact us!

duplex Stainless Steel Coil Grade Information
  • 2205 (UNS S31803/S32205, EN 1.4462)
  • 2304 (UNS S32304, EN 1.4362)
  • 2507 (UNS S32750, EN 1.4410)
  • 255 (UNS S32550, EN 1.4507)
  • 904L (UNS N08904, EN 1.4539)
  • 2101 (UNS S32101, EN 1.4162)
  • 2003 (UNS S32003, EN 1.4062)
  • 2102 (UNS S82011, EN 1.4162)
  • 2202 (UNS S32202, EN 1.4062)
  • 2305 (UNS S32305, EN 1.4362)
ASTM StandardASTM A240/A240M, ASTM A480/A480M, ASME SA666, ASTM A693/A693M, ASTM A965/A965M
ASME StandardASME SA240/SA240M, ASME SA480/SA480M, ASME SA666, ASME SA693/SA693M, ASME BPE
ASTM A240This standard specifies the requirements for chromium and chromium-nickel stainless steel plate, sheet, and strip for pressure vessels and general applications.
ASTM A480This standard provides general requirements for flat-rolled stainless and heat-resisting steel plate, sheet, and strip.
ASTM A666This standard covers the general requirements for annealed or cold-worked austenitic stainless steel sheet, strip, plate, and flat bar.
ASTM A693This standard specifies the requirements for precipitation-hardening stainless and heat-resisting steel plate, sheet, and strip.
ASTM A965This standard provides requirements for chemical composition and mechanical properties of wrought stainless steels used in surgical instruments.
Product NameDuplex Stainless Steel Coil
SizeDuplex Steel Coil
Thickness: 0.4mm-3mm
Width: 1000mm-2000mm
Support Customization

Duplex Steel Strip
Thickness: 0.1mm-3mm
Width: 10mm-1000mm
Support Customization
TechniqueHot rolled / cold rolled
Surface Treatment2B, 2D, BA, No.1, No.3, No.4, No.6, No.7, No.8, HL(Hairline), SB(Scotch-Brite), 6k, 8k, 12k, LASER, EMBOSSED
Customized ServicesSupport customization
Processing ServicesCutting, bending/forming, welding, hole processing/grooving, surface treatment, custom processing, etc.
MOQ1 Pcs
Delivery Time30-50 days, 7 days for stock goods
Packaging DetailsStandard export seaworthy packing or as required
Loading PortShanghai, Tianjin, Qingdao
Offer Ability6000MT/Per Month

Processing Technology:

  • Polishing
  • Surface Coating
  • Pickling
  • Electropolishing
  • Passivation
  • Surface Texturing
  • Heat Treatment
  • Sandblasting
  • Chemical coloring
  • Cutting
  • Bending & Forming
  • Welding
  • Hole Turning And Machining
  • Surface Treatment

Manufacturing Technology:

  • Casting
  • Pickling
  • Hot Rolling
  • Cold Rolling
  • Annealing
  • Finishing
  • Inspection and Quality Control

Gnee Stainless Steel Coil Quality Assurance (Destructive And Non-Destructive Testing)

  • Chemical Composition Testing
  • Laboratory Analysis
  • Appearance Size Test
  • Hardness Test
  • Mechanical Property Testing, Such As Tensile Strength, Yield Strength, Elongation And Other Performance Indicators
  • Pitting Corrosion Protection Test
  • Surface Quality Inspection
  • Penetration Test
  • Corrosion Resistance Testing
  • Intergranular Corrosion Test
  • Packaging Inspection
  • Roughness Test
  • Impact Analysis
  • Metallographic Experimental Test
Parameters Of Duplex Stainless coils/Strips
GradeC (%)Mn (%)P (%)S (%)Si (%)Cr (%)Ni (%)Mo (%)N (%)Cu (%)
GradeTensile Strength (MPa)Yield Strength (0.2% Offset) (MPa)Elongation (%)Hardness (HRC)
2205≥ 620≥ 450≥ 25≤ 30
2507≥ 800≥ 550≥ 15≤ 32
2304≥ 620≥ 400≥ 25≤ 30
904L≥ 490≥ 220≥ 35≤ 70
  • Oil and Gas Industry
  • Chemical Processing
  • Desalination Plants
  • Water Treatment
  • Structural Applications
  • Food Processing
  • Pulp and Paper Industry
  • Mining and Ore Processing
Why Choose Gnee Duplex Stainless Steel coil 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 Duplex Stainless Steel coils?

One of the key features of Duplex Stainless Steel Coils is their exceptional corrosion resistance. They exhibit resistance to various corrosive environments, including acidic, alkaline, and chloride-containing environments. This corrosion resistance is superior to that of conventional stainless steel coils, making Duplex Stainless Steel Coils suitable for demanding applications where corrosion is a significant concern.

Duplex Stainless Steel Coils offer excellent strength and toughness. Their unique microstructure consisting of austenite and ferrite phases provides a balance between strength and toughness. Compared to conventional stainless steel coils, Duplex Stainless Steel Coils have higher yield strength and tensile strength, enabling them to withstand higher forces and pressures.

Duplex Stainless Steel Coils exhibit outstanding resistance to stress corrosion cracking. Stress corrosion cracking is a common corrosion problem that leads to cracking of materials under the combined influence of tensile stress and corrosive environments. The special microstructure of Duplex Stainless Steel Coils provides higher resistance to stress corrosion, reducing the risk of cracking in such conditions.

Duplex Stainless Steel Coils exhibit a lower thermal expansion coefficient compared to austenitic stainless steels. This property can be advantageous in applications where dimensional stability is important, as it reduces the risk of distortion or deformation due to temperature changes. Additionally, Duplex Stainless Steel Coils have good thermal conductivity, facilitating efficient heat transfer in applications that require it.

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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