Super Duplex Steel is a highly sought-after material in various industries due to its exceptional properties like corrosion resistance, high strength, and durability. In this comprehensive guide, we will delve into the specifications, chemical composition, and mechanical properties of Super Duplex Steel pipes, and why Calico Metal Alloys LLP stands out as a premier supplier and exporter of these pipes in India.
Specifications of Super Duplex Steel Pipes
Super Duplex Steel pipes come in a variety of specifications to suit different industrial applications. These specifications typically include dimensions such as outer diameter, wall thickness, and length, as well as standards like ASTM, ASME, and API. The common specifications for Super Duplex Steel pipes are ASTM A790, ASTM A928, ASTM A789, ASTM A790, and ASTM A789.
Equivalent Grade of Super Duplex Steel Pipes
Super Duplex Steel pipes are often graded according to their chemical composition and mechanical properties. The equivalent grades of Super Duplex Steel pipes include UNS S32750, UNS S32760, SAF 2507, and 1.4410. These grades offer similar performance characteristics, making them interchangeable in many applications.

Manufacturing Process Of Super Duplex Pipes
Rolling and Welding
The strips pass through the number of rollers as per the required size. In the tubes-mill, the strip is gradually converted into the tubular shape. The fitted welding machine is then used to weld trim edges of the strip using TIG welding process.
Length Cutting
Rolled pipes and tubes thus manufactured are cut to the required lengths depending upon the industrial demand. We use a variety of methods—sawing, lathe cutting, rotary cutting, supported shear cutting, dual-blade shear cutting, and laser cutting.
Cleaning and Heating Phase
Subjected to cleaning to remove the dirt. Further, a heat treatment is given to these rolled pipes and tubes to remove the stresses that may occur due to welding and formation processes. Heat treatment is given on the continuously rolling hearth furnace.
Cold Drawing Process
Required size may not be obtained from the mill directly. Then, the cold operation process can be used to obtain the desired size. In the cold drawing process, the tube or pipe is drawn over the bench using Die plugs.
Finishing Process
Pipe and tubes are then subjected to cleaning, heat treatment, pickling and straightening. The computerized ink jet marking machine then mark the finished pipes or tubes. Then they marked with grade of material, size, heat number.
Chemical Composition of Super Duplex Steel Pipe
The chemical composition of Super Duplex Steel pipes plays a crucial role in determining their corrosion resistance, strength, and weldability. Typically, Super Duplex Steel contains elements such as chromium, nickel, molybdenum, and nitrogen in varying proportions. The exact composition may vary depending on the specific grade, but a typical composition includes around 25% chromium, 7% nickel, 3% molybdenum, and 0.25% nitrogen.
Mechanical Properties of Super Duplex Steel Pipe
The mechanical properties of Super Duplex Steel pipes make them ideal for demanding applications in industries such as oil and gas, chemical processing, and marine engineering. These properties include high tensile strength, excellent corrosion resistance, and good toughness even at low temperatures. Super Duplex Steel pipes exhibit a combination of properties derived from both austenitic and ferritic stainless steels, making them highly versatile.
Why Choose Calico Metal Alloys LLP?
Calico Metal Alloys LLP stands out as a premier supplier and exporter of Super Duplex Steel pipes for several reasons. With a focus on quality assurance, we ensure that our products meet stringent standards through rigorous testing and inspection processes. Our wide range of Super Duplex Steel pipes caters to diverse customer requirements, offering seamless and welded options in various sizes, grades, and specifications. Competitive pricing, prompt delivery, and a commitment to customer satisfaction are at the core of our business ethos, making us the preferred choice for discerning customers in India and beyond.
Super Duplex Steel Pipes Specifications
Standard | ASTM A789, A790 |
Outside Diameter | 6-203mm |
Wall Thickness | 0.5-25mm |
Length | Up to 25m |
Schedule | SCH 5 to SCH XXS |
Delivery Condition | Pickled, Polished, Bright Annealed |
Technique | Seamless/Welded |
Application | Heat Exchanger, Heater, Condenser, Machining, Bearing Machining, API Service… |
Package | Woven bag, wooden case, or as per customer's requirement. |
Quality Requirement | Mill Test Certificate (EN 10204/3.1); Third Part Inspection is acceptable. |
Types Of Super Duplex Stainless Steel Pipes
Super Duplex Steel Seamless Pipe

Super Duplex Steel Welded Pipe

Super Duplex Steel ERW Pipe

Super Duplex Steel EFW Pipe

Super Duplex Steel Square Pipe

Super Duplex Steel Round Pipe

Other Types Of Super Duplex Steel Pipes
SDSS Pipes | Super Duplex Steel Welded Pipe |
Super Duplex Steel Thick Wall Pipe | Super Duplex Steel Industrial Pipes |
Super Duplex Seamless Pipe | Super Duplex Steel Seamless Pipes |
Super Duplex Stainless Steel Pipes | Super Duplex Pipe |
Super Duplex Stainless Steel EFW Pipe | Super Duplex Stainless Steel ERW Pipe |
SDSS Square Pipe | Super Duplex Steel Rectangular Pipes |
ASME SA790 Super Duplex Steel Pipe | ASTM A790 Super Duplex Steel Pipes |
Super Duplex Steel Polished Pipes | Super Duplex Steel Cold Drawn Pipe |
Super Duplex Steel Schedule 40 Pipe | Super Duplex Stainless Steel Pipe |
Super Duplex Steel Pipes Industrial Application

Electrical

Automotive

Construction

Defence

Pharmaceutical

Petroleum

Petrochemical

Milk & Dairy
Export & Supply Destinations Of Super Duplex Pipes
Switzerland, Germany, Ukraine, Liechtenstein, Bulgaria, Turkey, Belarus, Greece, Belgium, Estonia, Latvia, Ireland, France, Moldova, Spain, Poland, Austria, Monaco, Malta, Luxembourg, Lithuania, Italy, Cyprus, United Kingdom, Hungary, Portugal, Norway, Romania, Finland, Netherlands, Slovakia, Serbia, Czechia/Czech Republic, Azerbaijan, Croatia, Russia, Sweden, Denmark.
Malaysia, Iraq, Bahrain, South Korea, Lebanon, Macau, Afghanistan, Oman, North Korea, Saudi Arabia, Turkey, Thailand, Azerbaijan, India, Bangladesh, Taiwan, Philippines, Mongolia, Nepal, Indonesia, British, Bhutan, United Arab Emirates, Singapore, Iran, Vietnam, Israel, Sri Lanka, Jordan, Russia, Myanmar, Kuwait, Armenia, Egypt, Qatar, China, Japan, Hong Kong, Maldives, Kyrgyzstan.
Kenya, Namibia, Mauritania, Mozambique, Ethiopia, Madagascar, Zimbabwe, Seychelles, Central African Republic, Angola, Rwanda, Zambia, Botswana, Burundi, Libya, Morocco, Senegal, Mauritius, Nigeria, Liberia, Eswatini, Gambia, Algeria, South Africa, Tunisia, Niger, Egypt, Cameroon, Uganda, Tanzania, Burkina Faso.
Haiti, El Salvador, Saint Lucia, Mexico, Canada, Belize, Trinidad and Tobago, Guatemala, Saint Vincent and the Grenadines, Costa Rica, Antigua and Barbuda, Dominican Republic, Honduras, Bahamas, Panama, Grenada, Cuba, Dominica, Jamaica, United States of America, Barbados, Nicaragua.
Argentina, Ecuador, Brazil, Paraguay, Chile, Bolivia, Venezuela, Uruguay, Colombia, Suriname, Peru, Guyana.