Calico Metal Alloys LLP stands as a reputable supplier and exporter of Duplex Steel UNS S31803 Sheets, renowned for our superior quality products and unwavering commitment to customer satisfaction. As a prominent supplier based in India, we specialize in providing top-grade Duplex Steel UNS S31803 Sheets, catering to diverse industrial requirements with precision and reliability.

With an extensive inventory of Duplex Steel UNS S31803 Sheets, we ensure that clients receive products that meet the highest standards of quality and durability. Leveraging advanced manufacturing techniques and stringent quality control measures, we deliver sheets that exhibit exceptional strength, corrosion resistance, and thermal stability, making them ideal for a wide range of applications in various industries such as construction, automotive, and aerospace.

We, as a team at Calico Metal Alloys LLP, are dedicated to excellence that extends beyond product quality to encompass customer-centric services. Our team of experienced professionals is committed to understanding client requirements and offering tailored solutions that meet their specific needs. Whether it's providing technical guidance, facilitating timely deliveries, or offering competitive pricing, we strive to exceed customer expectations at every step of the process.

Duplex Steel UNS S31803 Sheets

Manufacturing Process Of Duplex S31803 Sheets

Reheating Furnace

Reheating furnaces are used in hot rolling mills to heat the steel stock to the rolling temperatures.

Scale Breaker

Slab moves first through a scale breaker, which is a two-high rolling mill with vertical rolls that loosens the furnace scale and removes it with high-pressure water jets.

Finish Rolling

The last stage of the rolling process is cold rolling,


Cooling or Quenching is a process of cooling a metal at a rapid rate.

Skin Pass Mill

This produces high-gloss surfaces and achieves the desired mechanical strip properties such as deep-drawing strength.

Marking & Packing

Proper packaging and labeling not only makes the final product look attractive but also save a huge amount of money by saving the product from wrong handling.

Duplex Steel UNS S31803 Sheets are a type of duplex stainless steel, known for their exceptional combination of properties derived from both austenitic and ferritic stainless steels. This grade of steel consists of a dual-phase microstructure, typically comprising roughly equal proportions of austenite and ferrite phases.

Advantages of Duplex Steel UNS S31803 Sheets

Duplex Steel UNS S31803 sheets offer a range of advantages due to their unique composition and properties. Here are some of the key advantages:

Corrosion Resistance: One of the primary advantages of Duplex Steel UNS S31803 sheets is its excellent corrosion resistance. It provides resistance to various corrosive environments, including chloride-containing environments such as seawater, making it suitable for use in marine applications and offshore oil and gas platforms.

High Strength: Duplex steel exhibits high tensile and yield strength compared to conventional austenitic stainless steels. This higher strength allows for the use of thinner material, leading to cost savings and reduced weight in structural applications.

Good Toughness and Ductility: Duplex stainless steel maintains good toughness and ductility even at low temperatures, making it suitable for use in cryogenic applications. This property also enhances its resistance to impact and fatigue loading.

Stress Corrosion Cracking Resistance: Duplex steel offers superior resistance to stress corrosion cracking (SCC) compared to austenitic stainless steels, particularly in chloride-containing environments. This makes it a preferred choice for applications subjected to high mechanical stress and corrosive conditions.

Cost-Effectiveness: While duplex stainless steel may have a higher initial cost compared to austenitic stainless steels, its longer service life, reduced maintenance requirements, and improved performance in corrosive environments often result in overall cost savings over the lifecycle of the equipment or structure.

Weldability: Duplex Steel UNS S31803 sheets generally exhibit good weldability when appropriate welding procedures are followed. This allows for ease of fabrication and construction, reducing manufacturing time and costs.

These advantages make Duplex Steel UNS S31803 sheets a preferred material choice for a wide range of applications where corrosion resistance, strength, and durability are critical requirements.

Duplex Steel S31803 Sheet Specifications

Sheets Specifications ASTM A240 / ASME SA240, BS EN 10088-2, en 10028-7, IS 6911
Sheets Dimension Standard MSRR, AMS, BS, JIS, AISI, ASTM, GB, DIN, EN, etc
DSS Sheets Thickness 4mm-100mm
DSS Sheets Width 1000mm, 1219mm, 1500mm, 1800mm, 2000mm etc
DSS Sheets Length 2000mm, 2440mm, 3000mm, 5800mm, 6000mm, etc
DSS Sheets Thickness 0.1, 0.2/0.3/0.5/0.6/0.7/0.8/0.9/1.0/1.5, 2.0/2.5/3.0/4.0/5.0/6.0/8.0/9/10/12/16/18/20/ 22/25/30 mm
International Standard of Duplex Stainless Steel Sheets ASTM A480
EN ISO 9445
EN ISO 18286
EN 10051
EN 10088-1
ISO 15510
Tolerances (width / thickness) of Duplex Stainless Steel Sheets EN 10258/ DIN 59381
EN 10151 ASME SA240 DSS Sheet
EN 10088 SA240 Sheet
Finish of DSS Sheets 2B, 2D, BA NO (8), Cold rolled Sheet (CR), Hot rolled sheet (HR), Checkered, No.4, BA, 8K, satin, mirror etc.
Hardness Half Hard, Soft, Hard, Quarter Hard, Spring Hard
Value Added Service Cladding, Heat Treatment, Annealed, Pickling, Polish, Rolling, Cutting, Bending, Forging, Minor Fabrication Etc.
Duplex Stainless Steel Profiling Plasma Sheet Cutting
Laser Sheet Cutting
Oxy-propane Flame Cutting

Types Of Duplex Stainless Steel S31803 Sheet


Duplex Steel S31803 Hot Rolled Sheet


Duplex Steel S31803 Cold Rolled Sheet


Duplex Steel S31803 Perforated Sheet


Duplex Steel S31803 Polished Sheet


Duplex Steel S31803 2B Finish Sheet


Duplex Steel S31803 Plain Sheet


Other Types Of Duplex Steel S31803 Sheets

DSS S31803 Perforated Sheet Duplex Steel S31803 Cold Rolled Sheet
20 Gauge Duplex Steel S31803 Sheet Duplex Steel S31803 High Performance Sheet
Precision Ground Duplex Stainless S31803 Sheet Extra-Heavy Duplex Stainless S31803 Sheet
S31803 Perforated Duplex Steel Sheet Duplex Steel F51 Thik Sheet
F51 Duplex Stainless Steel Sheet 10 Gauge Duplex Steel S31803 Sheet
DSS S31803 Plain Sheets Duplex Stainless S31803 2B Finish Sheets
ASME SA240 Duplex Steel S31803 Cold Rolled Sheets ASTM A240 Duplex Steel S31803 Sheets
Duplex Stainless Steel S31803 Sheets Cut To Size Polished Duplex Stainless Steel S31803 Sheet
Duplex Steel S31803 BA Finish Sheets Duplex Steel S31803 HR Sheets
Quality Duplex Steel S31803 Sheet Duplex Stainless Steel S31803 CR Sheets
Duplex Steel S31803 Custom Length Sheet Custom Duplex Stainless Steel S31803 Sheets

Duplex Steel UNS S31803 Sheets Equivalent Grades

Duplex Steel UNS S31803 Sheets are commonly referred to as 2205 stainless steel. Equivalent grades include ASTM A240, ASME SA240, and EN 1.4462. With high strength and corrosion resistance, these sheets are widely used in various industries such as marine, oil and gas, and chemical processing. They exhibit excellent weldability and formability, making them suitable for a range of applications requiring durability and reliability in harsh environments.

Duplex S31803 1.4462 S31803

Chemical Composition of Duplex Steel UNS S31803 Sheets

Duplex Steel UNS S31803 Sheets typically consist of approximately 22% chromium, 5-6% nickel, 3% molybdenum, and 0.15-0.30% nitrogen. This composition imparts excellent corrosion resistance and high strength properties to the material. Additionally, it contains small amounts of other elements such as manganese, silicon, sulfur, and carbon to achieve desired mechanical and metallurgical properties. The duplex structure of this steel, featuring a balanced mixture of austenite and ferrite phases, contributes to its superior performance in various demanding environments.

Grade C Mn Si P S Cr Mo Ni N Fe
S31803 0.030 max 2.00 max 1.00 max 0.030 max 0.020 max 22.0 – 23.0 3.0 – 3.5 4.50 – 6.50 0.14 – 0.20 63.72 min

Mechanical Properties of Duplex Steel UNS S31803 Sheets

Duplex Steel UNS S31803 sheets are characterized by a unique combination of mechanical properties, offering high strength along with good ductility and toughness. With a tensile strength typically ranging from 620 to 900 MPa and a yield strength of approximately 450 MPa, these sheets provide robust structural integrity. Their superior resistance to corrosion, particularly in chloride environments, makes them highly suitable for applications in aggressive settings such as oil and gas production, chemical processing, and marine engineering. Furthermore, their duplex microstructure contributes to improved stress corrosion cracking resistance and enhanced durability, ensuring reliable performance in demanding conditions.

Grades Density (g/cm 3) Density (lb/in 3) Melting Point (°C) Melting Point (°F)
S31803 7.805 0.285 1420 – 1465 2588 – 2669

Application of Duplex Steel UNS S31803 Sheets

In terms of applications, Duplex Steel UNS S31803 Sheets find widespread use across multiple industries:

Oil and Gas: These sheets are commonly employed in offshore platforms, pipelines, and equipment for their corrosion resistance and strength, even in aggressive oilfield environments.

Chemical Processing: Due to their resistance to corrosion from chemicals and high temperatures, these sheets are utilized in chemical reactors, storage tanks, and piping systems.

Desalination: In the desalination industry, where seawater is converted into potable water, Duplex Steel UNS S31803 Sheets are favored for their ability to withstand the corrosive effects of saline environments.

Pulp and Paper: They are used in pulp digesters, bleaching equipment, and other machinery involved in the paper manufacturing process, where resistance to corrosion and erosion is critical.

Construction: These sheets are employed in structural components for buildings, bridges, and infrastructure projects due to their high strength-to-weight ratio and durability.

Why Choose Calico Metal Alloy Pvt Ltd?

Calico Metal Alloy Pvt Ltd stands out for its commitment to superior quality and reliability in the metal alloy industry. With state-of-the-art facilities and a team of experienced professionals, we consistently deliver products that meet stringent standards. Our dedication to innovation ensures we stay at the forefront of technological advancements, offering clients competitive advantages. Our customer-centric approach and adherence to ethical practices make us a trusted partner for diverse alloy needs worldwide.

Electrical Industry


Automotive Industry


Construction Industry


Defence Industry


Pharmaceutical Industry


Petroleum Industry


Petrochemical Industry


Milk & Dairy Industry

Milk & Dairy

Export & Supply Destinations Of Duplex S31803 Sheets

Austria, Azerbaijan, Belarus, Belgium, Bulgaria, Croatia, Cyprus, Czechia/Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Ireland, Italy, Latvia, Liechtenstein, Lithuania, Luxembourg, Malta, Moldova, Monaco, Netherlands, Norway, Poland, Portugal, Romania, Russia, Serbia, Slovakia, Spain, Sweden, Switzerland, Turkey, Ukraine, United Kingdom.

Afghanistan, Armenia, Azerbaijan, Bahrain, Bangladesh, Bhutan, British, China, Egypt, Hong Kong, India, Indonesia, Iran, Iraq, Israel, Japan, Jordan, Kuwait, Kyrgyzstan, Lebanon, Macau, Malaysia, Maldives, Mongolia, Myanmar, Nepal, North Korea, Oman, Philippines, Qatar, Russia, Saudi Arabia, Singapore, South Korea, Sri Lanka, Taiwan, Thailand, Turkey, United Arab Emirates, Vietnam.

Algeria, Angola, Botswana, Burkina Faso, Burundi, Cameroon, Central African Republic, Egypt, Eswatini, Ethiopia, Gambia, Kenya, Liberia, Libya, Madagascar, Mauritania, Mauritius, Morocco, Mozambique, Namibia, Niger, Nigeria, Rwanda, Senegal, Seychelles, South Africa, Tanzania, Tunisia, Uganda, Zambia, Zimbabwe.

Antigua and Barbuda, Bahamas, Barbados, Belize, Canada, Costa Rica, Cuba, Dominica, Dominican Republic, El Salvador, Grenada, Guatemala, Haiti, Honduras, Jamaica, Mexico, Nicaragua, Panama, Saint Lucia, Saint Vincent and the Grenadines, Trinidad and Tobago, United States of America.

Argentina, Bolivia, Brazil, Chile, Colombia, Ecuador, Guyana, Paraguay, Peru, Suriname, Uruguay, Venezuela.