Your Professional Duplex Steel Supplier

 

Jiangsu Cunrui Metal Products Co., Ltd. was established on March 24, 2016. It is a modern enterprise specializing in the production and export of high-quality metal pipes.

 

Our company is a significant manufacturer of high-quality metal materials in China. Our product range includes stainless steel, carbon steel, alloy steel, silicon steel, etc., which are widely used in the medical, food, construction and other industries.

 

 
  • S32550 Duplex Stainless Steel Coil
    UNS S32550 coil (ASTM A789/A790) is engineered where high chloride exposure meets significant mechanical stress. Its optimized chemistry, including copper, provides exceptional resistance to stress
  • S31254 Duplex Stainless Steel Plate
    S31254 is this super duplex stainless steel that seems pretty advanced for handling tough corrosion stuff. Its UNS number is S31254, and it follows standards like ASTM A240. Compared to regular
  • S31803 Duplex Stainless Steel Plate
    S31803 Duplex Stainless Steel Plate, also known as Duplex S31803 Plate, is a corrosion-resistant and high-strength stainless steel sheet widely used in demanding industries. It is produced with a
  • 2304 Duplex Stainless Steel Plate
    2304 duplex stainless steel plate is a low-alloyed duplex stainless steel., and its internal structure is roughly equal to austenite and ferrite, and its structure has reached a good balance...
  • S32750 Super Duplex Stainless Steel Plate
    The S32750 Super Duplex Stainless Steel Plate, also referred to as Super Duplex S32750 Plate, is a premium stainless steel sheet engineered for exceptional strength and resistance to aggressive
  • S32760 Super Duplex Stainless Steel Plate
    S32760 Super Duplex Stainless Steel Plate for Offshore & Chloride ServiceFor projects exposed to seawater, chlorides or aggressive chemicals, material selection often determines the maintenance cost
  • 2101 Duplex Stainless Steel Plate
    The 2101 Duplex Stainless Steel Plate, also referred to as 2101 Duplex Stainless Steel Sheet, is a lean duplex stainless steel designed to provide a balanced combination of corrosion resistance and
  • 2205 Duplex Stainless Steel Plate
    The 2205 Duplex Stainless Steel Plate is a dual-phase stainless steel that combines the advantages of both ferritic and austenitic structures. With a chemical composition of approximately 22%
  • S32101 Duplex Stainless Steel Pipe
    The S32101 Duplex Stainless Steel Pipe, also known as S32101 Duplex Stainless Steel Tube, is a high-quality dual-phase stainless steel pipe designed to offer an optimal balance of strength and
  • S32304 Duplex Stainless Steel Tube
    The S32304 Duplex Stainless Steel Tube, also known as S32304 Duplex Stainless Steel Pipe, is a high-performance duplex stainless steel designed to combine excellent mechanical strength with superior
  • 2205 Duplex Stainless Steel Pipe
    2205 Duplex Stainless Steel Pipe is a premium-grade tubular product manufactured from duplex stainless steel with a balanced microstructure of austenite and ferrite. This composition provides
  • 2507 Super Duplex Stainless Steel Pipe
    2507 Super Duplex Stainless Steel Pipe is a high-performance duplex alloy pipe designed for critical applications that demand superior strength and extreme corrosion resistance. With a balanced
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Why Choose Us
Production Capacity
Equipped with large-scale production facilities, we have an annual manufacturing capacity exceeding 6,000 metric tons.
24-Hour Online Service
We provide round-the-clock customer support with inquiry responses within 24 hours, including technical assistance and quotation services.
Global Supply Chain Network
Our products have earned widespread recognition and trust across more than 50 countries, including the United States, France, South Korea, Japan, India, Germany, and Spain, as well as key regions such as South Asia, Southeast Asia, and the Middle East.

 

Parameter

Parameter

Specification Range / Standard

Grade / Standard

ASTM A240 / ASME SA240 / UNS S31803 / EN 1.4462

Thickness

3mm – 100mm (customizable)

Width

1000mm – 3000mm (cut-to-size available)

Length

2000mm – 12000mm or customized

Surface Finish

2B, BA, No.1, No.4, HL, or polished

Yield Strength (Rp0.2)

≥ 450 MPa

Tensile Strength (Rm)

620 – 880 MPa

Elongation (%)

≥ 25%

Hardness

≤ 290 HB

Corrosion Resistance

Excellent resistance to chloride and seawater environments

Certificates

MTC, SGS, BV, TUV, ISO 9001, CE

 

Customized Services

 

Cut-to-Size Services

 

Available through laser cutting, water jet cutting, and plasma cutting.

01

Comprehensive Processing Support

Includes drilling, bending, polishing, welding, and edge preparation.

02

Specialized Dimensions

 

Custom sizes available based on your drawings.

03

Surface Treatments

 

Options include pickling, sandblasting, and mirror finishing.

04

Low Minimum Order Quantity (MOQ)

Flexible order requirements with a quick turnaround for urgent projects.

05

 

Benefits of Duplex Steel

Improved Strength

Many duplex grades are as much as two-times stronger than austenitic and ferritic stainless steel grades.

High Toughness and Ductility

Duplex stainless steel is often more formable under pressure than ferritic grades and provides greater toughness. Though they often offer lower values than austenitic steels, the unique structure and characteristics of duplex steel often outweigh any concerns.

S32750 Super Duplex Stainless Steel Plate
S32760 Super Duplex Stainless Steel Plate

High Corrosion Resistance

Depending on the grade in question, duplex stainless steels offer comparable (or better) corrosion resistance as common austenitic grades. For alloys with increased nitrogen, molybdenum, and chromium, steels exhibit high resistance to both crevice corrosion and chloride pitting.

Cost Effectiveness

Duplex stainless steel offers all of the above benefits while requiring lower levels of molybdenum and nickel. This means that it is a lower-cost option than many traditional austenitic grades of stainless steel.The price of duplex alloys is often less volatile than other steel grades making it easier to estimate costs -- both at an upfront and lifetime level.The higher strength and corrosion resistance also means that many parts made using duplex stainless can be thinner than their austenitic counterparts providing lower costs.

 

Application of Duplex Steel

 
Water Treatment and Desalination

Desalination and water treatment applications need the use of a long-lasting material that can resist the corrosive nature of water, liquids, and salt. You're looking at stainless steel that's been duplexed. The advantages of adopting duplex stainless steel significantly outweigh the original investment expenses due to its exceptional strength, corrosion resistance, extended life-span, and cost efficiency.

Petroleum and natural gas

The oil and gas sector requires a material with high corrosion resistance, adaptability, and strength. Duplex stainless steel meets all of the requirements.
Because of its high resistance and durability to chloride stress corrosion cracking, duplex stainless steel is especially well-suited for offshore applications that operate at high pressures and extreme depths. Duplex is also a popular material for onshore pipelines carrying corrosive substances. As a result, the oil and gas sector remains the greatest consumer of duplex stainless steels.

Transportation

Several areas of civilization rely on an efficient system for carrying products and people. Duplex stainless steels are used in many modes of transportation, including boats, planes, trains, and automobiles.
Truck tanks and trailers built of such high-strength stainless steels, for example, profit from unrivalled effectiveness, endurance, and corrosion resistance. They are also less expensive than traditional carbon steel choices.

Even the rail industry is using duplex stainless steel, leveraging its exceptional power consumption and corrosion resistance to enhance the safety of passenger waggons.

Equipment

Duplex seems to have become the preferred material for a variety of industrial equipment, including food and beverage storage containers, pipelines, tanks, pressure vessels, and heat exchangers, due to its strength, durability, and ease of cleaning. Duplex stainless steel storage containers last a lifetime due to its superior corrosion resistance and need little to no maintenance. Duplex stainless steel is also resistant to corrosion, which means that it doesn't need a protective layer, making it more cost-effective than other, less lasting materials.

Construction & Building

Duplex stainless steels are revolutionising architectural design possibilities. These grades are especially well-suited for roofs, façades, and bridges because to their unique mix of durability and aesthetic appeal.

 

Logistics

We will help you to choose the best shipping way according to your detail requirements. By sea, by air, or by express, etc.

 
 

The time frame of an order delivery is divided into two parts

Processing time: 7-14 Days
Shipping time: 20~30 Days

 
 
 

Shipping methods

 

DDP, DAP, EXW, etc.

 
 

Shipping fee

 

The shipping fee will be changed according to every pacel's weight.

 

 

 

Certificate

 

productcate-1-1

 

 

FAQ

 

Q: What are Duplex Steels?

A: Duplex stainless steel is a metallurgical wonder. It is attractive because its duality, a harmonic convergence, gives it tensile strength greater than austenitic stainless steel. Along with its strength, it resists stress corrosion cracking, a problem for many common alloys. This amazing material resists pitting and crevice corrosion, especially in chloride-rich conditions, making it useful in maritime engineering, chemical processing, and oil and gas exploration.

Q: What is the difference between S31803 and 2205 Duplex Stainless Steel?

A: S31803 is the original grade designation, while 2205 (UNS S32205) is its improved version with tighter composition control. Both are widely interchangeable.

Q: Can I order small quantities of Duplex S31803 Plate?

A: Yes, we accept flexible MOQ and also provide cut-to-size services for urgent or small projects.

As one of the leading duplex steel manufacturers in China, we warmly welcome you to buy cheap duplex steel for sale here from our factory. All customized products are with high quality and competitive price. For pricelist and free sample, contact us now.

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