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Girgaon, Mumbai - 400004
Duplex Steel UNS S32750 Welded Pipes
What is Super Duplex Steel UNS S32750 Welded Pipes?
Super Duplex Steel UNS S32750 Welded Pipes are high-performance duplex stainless steel pipes designed for applications requiring very high corrosion resistance, mechanical strength and reliable performance in aggressive service environments. UNS S32750, commonly known as Super Duplex 2507, has a balanced austenitic-ferritic microstructure that provides a combination of high strength and excellent resistance to corrosive conditions.
The alloy contains chromium, molybdenum, nickel and nitrogen, which contribute to its resistance to pitting, crevice corrosion and chloride-induced stress corrosion cracking. Compared with conventional duplex stainless steel grades, UNS S32750 provides higher alloy content and is particularly suitable for severe chloride-containing and marine environments.
Super Duplex Steel UNS S32750 Welded Pipes are manufactured by forming stainless steel plate, sheet, or strip into a cylindrical shape and joining the longitudinal edges through a controlled welding process. They can be supplied in different outside diameters, wall thicknesses, schedules and lengths according to applicable standards and project requirements.
Kamal Steels is a Super Duplex Steel UNS S32750 Welded Pipes Manufacturer and Exporter in India, supplying welded pipes for oil and gas, offshore, marine, chemical processing, petrochemical, desalination, power generation, refinery and other demanding industrial applications. Pipes can be supplied with required testing, inspection, material certificates and documentation according to customer and project specifications.
Table of Contents
- Super Duplex Steel UNS S32750 Welded Pipe Specifications
- UNS S32750 Welded Pipe Weight Chart
- UNS S32750 Welded Pipe Size Range
- ASTM A790 UNS S32750 Welded Pipe
- UNS S32750 vs UNS S32205 Welded Pipe
- Chemical Composition of UNS S32750 Welded Pipe
- Mechanical Properties of UNS S32750 Welded Pipe
- Features of UNS S32750 Welded Pipes
- Super Duplex Steel UNS S32750 Welded Pipe Applications
- Industries Using UNS S32750 Welded Pipes
- Frequently Asked Questions
Super Duplex Steel UNS S32750 Welded Pipe Specifications
Super Duplex Steel UNS S32750 Welded Pipes are manufactured for applications requiring high mechanical strength and excellent resistance to corrosion. UNS S32750, commonly known as Super Duplex 2507, contains chromium, molybdenum, nickel, and nitrogen, providing strong resistance to pitting, crevice corrosion, and chloride-induced stress corrosion cracking.
| Specification | Details |
|---|---|
| Material Grade | Super Duplex Steel UNS S32750 |
| Common Name | Super Duplex 2507 |
| Product Type | Welded Pipe |
| Manufacturing Standard | ASTM A790 / ASME SA790 |
| Size | As per standard and customer requirements |
| Wall Thickness | Various schedules and customized thicknesses |
| Length | Random, fixed, and cut lengths |
| Pipe Ends | Plain End, Beveled End, Threaded End |
| Surface Finish | Pickled, Passivated, and as required |
| Form | Round |
Kamal Steels is a Super Duplex Steel UNS S32750 Welded Pipes Manufacturer and Exporter in India, supplying pipes in different sizes, wall thicknesses, schedules, and lengths for demanding industrial applications.
UNS S32750 Welded Pipe Weight Chart
The weight of Super Duplex Steel UNS S32750 Welded Pipes depends on the outside diameter, wall thickness, schedule, and pipe length. The weight chart provides an approximate reference for material estimation, transportation planning, and project procurement.
| Nominal Pipe Size | Outside Diameter | Schedule | Wall Thickness | Approx. Weight (kg/m) |
|---|---|---|---|---|
| 1/2 Inch | 21.3 mm | Sch 40 | 2.77 mm | 1.27 |
| 1 Inch | 33.4 mm | Sch 40 | 3.38 mm | 2.52 |
| 2 Inch | 60.3 mm | Sch 40 | 3.91 mm | 5.59 |
| 3 Inch | 88.9 mm | Sch 40 | 5.49 mm | 11.57 |
| 4 Inch | 114.3 mm | Sch 40 | 6.02 mm | 16.43 |
| 6 Inch | 168.3 mm | Sch 40 | 7.11 mm | 28.26 |
| 8 Inch | 219.1 mm | Sch 40 | 8.18 mm | 42.55 |
Actual pipe weight may vary according to dimensional tolerances and manufacturing requirements. For exact weight calculations, the required outside diameter, wall thickness, schedule, and length should be specified.
UNS S32750 Welded Pipe Size Range
Super Duplex Steel UNS S32750 Welded Pipes are available in different nominal sizes, outside diameters, wall thicknesses, and schedules to meet the requirements of process and pressure piping systems. The appropriate size depends on operating pressure, temperature, fluid service, and project design.
| Nominal Pipe Size | Outside Diameter | Common Schedules |
|---|---|---|
| 1/2 Inch | 21.3 mm | Sch 10, 40, 80 |
| 1 Inch | 33.4 mm | Sch 10, 40, 80 |
| 2 Inch | 60.3 mm | Sch 10, 40, 80, 160 |
| 3 Inch | 88.9 mm | Sch 10, 40, 80, 160 |
| 4 Inch | 114.3 mm | Sch 10, 40, 80, 160 |
| 6 Inch | 168.3 mm | Sch 10, 40, 40S, 80 |
| 8 Inch | 219.1 mm | Sch 10, 40, 40S, 80 |
Customized dimensions, wall thicknesses, and lengths can also be supplied depending on applicable standards, manufacturing requirements, quantity, and project specifications.
ASTM A790 UNS S32750 Welded Pipe
ASTM A790 UNS S32750 Welded Pipes are duplex stainless steel pipes intended for corrosive service applications where high strength and resistance to aggressive environments are required. ASTM A790 covers seamless and welded ferritic, austenitic, and duplex stainless steel pipe.
UNS S32750 is a Super Duplex stainless steel grade commonly known as Super Duplex 2507. Its high chromium, molybdenum, and nitrogen content provides excellent resistance to pitting and crevice corrosion, particularly in chloride-containing environments.
| Standard | Grade | Product |
|---|---|---|
| ASTM A790 | UNS S32750 | Super Duplex Welded Pipe |
| ASME SA790 | UNS S32750 | Super Duplex Welded Pipe |
ASTM A790 UNS S32750 Welded Pipes are commonly used in oil and gas, offshore, marine, chemical processing, petrochemical, desalination, refinery, and power generation applications.
UNS S32750 vs UNS S32205 Welded Pipe
UNS S32750 and UNS S32205 are both duplex stainless steel grades, but UNS S32750 belongs to the Super Duplex family and has higher alloying levels. This gives UNS S32750 greater resistance to pitting and crevice corrosion and makes it suitable for more severe chloride-containing and marine environments.
| Property | UNS S32750 | UNS S32205 |
|---|---|---|
| Common Name | Super Duplex 2507 | Duplex 2205 |
| Material Family | Super Duplex Stainless Steel | Duplex Stainless Steel |
| Microstructure | Austenitic-Ferritic | Austenitic-Ferritic |
| Corrosion Resistance | Very High | High |
| Pitting Resistance | Higher | High |
| Typical Service | Severe chloride and marine environments | General corrosive and process environments |
| Typical Applications | Offshore, seawater, desalination, oil & gas | Oil & gas, chemical, marine, petrochemical |
The selection between UNS S32750 and UNS S32205 depends on the operating environment, corrosion requirements, pressure, temperature, and applicable project specifications.
Chemical Composition of UNS S32750 Welded Pipe
The chemical composition of Super Duplex Steel UNS S32750 is designed to provide a high level of corrosion resistance and mechanical strength. The combination of chromium, molybdenum, nickel, and nitrogen contributes to its performance in aggressive chloride-containing environments.
| Element | Typical Requirement (%) |
|---|---|
| Carbon (C) | 0.030 max. |
| Chromium (Cr) | 24.0 – 26.0 |
| Nickel (Ni) | 6.0 – 8.0 |
| Molybdenum (Mo) | 3.0 – 5.0 |
| Nitrogen (N) | 0.24 – 0.32 |
| Manganese (Mn) | 1.20 max. |
| Silicon (Si) | 0.80 max. |
| Phosphorus (P) | 0.035 max. |
| Sulfur (S) | 0.020 max. |
Chemical Composition of UNS S32750 Welded Pipe
The chemical composition of Super Duplex Steel UNS S32750 is designed to provide a high level of corrosion resistance and mechanical strength. The combination of chromium, molybdenum, nickel, and nitrogen contributes to its performance in aggressive chloride-containing environments.
| Element | Typical Requirement (%) |
|---|---|
| Carbon (C) | 0.030 max. |
| Chromium (Cr) | 24.0 – 26.0 |
| Nickel (Ni) | 6.0 – 8.0 |
| Molybdenum (Mo) | 3.0 – 5.0 |
| Nitrogen (N) | 0.24 – 0.32 |
| Manganese (Mn) | 1.20 max. |
| Silicon (Si) | 0.80 max. |
| Phosphorus (P) | 0.035 max. |
| Sulfur (S) | 0.020 max. |
Mechanical Properties of UNS S32750 Welded Pipe
Super Duplex Steel UNS S32750 provides high mechanical strength along with good ductility and toughness. These properties allow the material to be used in demanding pressure and process piping applications.
| Property | Typical Minimum Requirement |
|---|---|
| Tensile Strength | 795 MPa min. |
| Yield Strength | 550 MPa min. |
| Elongation | 15% min. |
Mechanical property requirements may vary according to the applicable product specification, pipe dimensions, manufacturing condition, and testing requirements.
Features of UNS S32750 Welded Pipes
| Feature | Description |
|---|---|
| High Strength | Provides high mechanical strength for demanding piping applications. |
| Excellent Corrosion Resistance | Offers excellent resistance to aggressive corrosive environments. |
| High Pitting Resistance | Suitable for chloride-containing and seawater environments. |
| Crevice Corrosion Resistance | Provides strong resistance to localized corrosion. |
| Stress Corrosion Resistance | Good resistance to chloride-induced stress corrosion cracking. |
| Duplex Microstructure | Combines austenitic and ferritic phases for balanced properties. |
| Long Service Life | Suitable for demanding industrial environments and critical piping systems. |
Super Duplex Steel UNS S32750 Welded Pipe Applications
Super Duplex Steel UNS S32750 Welded Pipes are used where high strength and excellent corrosion resistance are required, particularly in chloride-rich, marine and aggressive process environments.
| Application | Typical Use |
|---|---|
| Offshore Oil & Gas | Production, process, utility, and seawater piping |
| Desalination | Seawater intake and high-chloride service piping |
| Marine Systems | Seawater and cooling water piping |
| Chemical Processing | Aggressive chemical transfer and process lines |
| Petrochemical Plants | Corrosive process and fluid-handling systems |
| Refineries | Process piping and corrosive service applications |
| Power Generation | Cooling water and process piping systems |
Industries Using UNS S32750 Welded Pipes
UNS S32750 Welded Pipes are used across industries where piping systems are exposed to aggressive chemicals, seawater, chlorides, pressure and demanding operating conditions.
| Industry | Typical Applications |
|---|---|
| Oil & Gas | Offshore production, process piping and fluid transfer |
| Petrochemical | Corrosive process piping and fluid handling |
| Chemical Processing | Aggressive chemical service and process systems |
| Marine | Seawater and marine piping systems |
| Desalination | Seawater intake, treatment and distribution |
| Power Generation | Cooling and auxiliary process piping |
| Refineries | Corrosive fluid and process piping |
Kamal Steels is a Super Duplex Steel UNS S32750 Welded Pipes Manufacturer and Exporter in India, supplying pipes in required sizes, schedules, wall thicknesses and lengths for domestic and international industrial projects.
Frequently Asked Questions
Super Duplex Steel UNS S32750 Welded Pipes are high-performance stainless steel pipes manufactured by welding Super Duplex stainless steel plates or coils. They provide exceptional corrosion resistance, superior mechanical strength, and excellent durability in aggressive industrial environments.
These pipes are manufactured according to ASTM A790, ASTM A928, ASME SA790, and ASME SA928 standards to ensure excellent weld quality, dimensional accuracy, and reliable performance.
They offer outstanding resistance to pitting, crevice corrosion, chloride stress corrosion cracking, seawater corrosion, erosion, and corrosion fatigue, along with significantly higher strength than conventional stainless steels.
These welded pipes are widely used in offshore oil & gas platforms, subsea pipelines, petrochemical plants, marine engineering, desalination plants, chemical processing industries, power generation facilities, and industrial process piping systems.
Super Duplex Steel UNS S32750 Welded Pipes are available from ½" NB to 48" NB in various schedules including SCH 5S, SCH 10S, SCH 40S, SCH 80S, XS, XXS, and customized dimensions as per project requirements.
Each pipe undergoes Positive Material Identification (PMI), Hydrostatic Testing, Radiographic Testing (RT), Ultrasonic Testing (UT), Eddy Current Testing, Mechanical Testing, Chemical Analysis, and Dimensional Inspection before dispatch.
Yes. Their high chromium, molybdenum, and nitrogen content provides exceptional resistance to seawater corrosion, making them ideal for offshore platforms, desalination plants, marine structures, and coastal industrial facilities.
Super Duplex Steel UNS S32750 contains higher levels of chromium, nickel, molybdenum, and nitrogen than standard duplex grades, providing greater mechanical strength and significantly improved resistance to localized corrosion and chloride-rich environments.
Yes. Every shipment is supplied with EN 10204 3.1 Mill Test Certificates, complete material traceability, inspection reports, and third-party inspection certificates upon customer request.
Kamal Steels is a trusted manufacturer and stockist offering certified materials, advanced manufacturing facilities, extensive ready stock, customized sizes, competitive pricing, strict quality control, complete documentation, and timely worldwide delivery for industrial piping projects.