High Quality Duplex/Super Duplex Forged Pipe Fittings
S31803/S32205 • S32750/S32760 • Strength • Sealing • Durability
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Super Duplex Steel S32750 Forged Fittings
- High-performance super duplex with very high strength
- PREN > 40 for exceptional pitting corrosion resistance
- Excellent resistance to chloride stress SCC
- Designed for extremely corrosive environments
- Suitable for high-pressure, high-temperature applications
- Widely used in offshore oil & gas and subsea equipment
- Minimum tensile strength: ~795 MPa
- Available as elbows, tees, reducers, caps, and sockets
- Long-term performance in seawater & acidic media
Super Duplex Steel S32760 Forged Fittings
- Enhanced version with tungsten for extra corrosion resistance
- High strength & excellent impact toughness
- Outstanding performance in aggressive chloride settings
- Excellent resistance to erosion–corrosion
- Used in chemical tanks, heat exchangers & marine systems
- Minimum tensile strength: ~800 MPa
- Ideal for pipelines in offshore & subsea applications
- Reliable for high-pressure flow lines & manifolds
- Available as elbows, tees, reducers, caps, and sockets
- Best choice for harsh & highly corrosive industries
Duplex Steel S31803 Forged Fittings
- Balanced duplex (50% ferrite, 50% austenite) structure
- Excellent resistance to pitting and crevice corrosion
- Higher strength vs. 300-series stainless steels
- Good weldability (requires controlled heat input)
- Superior stress corrosion cracking resistance
- Used in chemical processing, oil & gas, and refineries
- Available as elbows, tees, reducers, caps, and sockets
- Minimum tensile strength: ~620 MPa
- Ideal for chloride-rich and abrasive environments
Duplex Steel S32205 Forged Fittings
- Improved version of S31803 with balanced chemistry
- Higher PREN values for enhanced corrosion resistance
- Superior resistance to chloride-induced SCC
- Excellent toughness even at low temperatures
- High mechanical strength and pressure handling
- Used in offshore platforms and desalination plants
- Minimum tensile strength: ~650 MPa
- Available as elbows, tees, reducers, caps, and sockets
- Long service life in harsh sea-water environments
Frequently Asked Questions About Duplex & Super Duplex Forged Pipe Fittings
What are Duplex and Super Duplex Forged Pipe Fittings?
Duplex and Super Duplex Forged Pipe Fittings are high-strength, corrosion-resistant fittings manufactured using advanced forging processes. They are made from duplex grades like S31803 / S32205 and super duplex grades like S32750 / S32760, offering excellent resistance to pitting, crevice corrosion, and chloride stress corrosion cracking. These fittings are widely used in offshore drilling, desalination plants, chemical processing, oil & gas, and marine engineering.
What are the key grades of Duplex and Super Duplex Forged Pipe Fittings available?
We offer Duplex Steel S31803 / S32205 (UNS S31803/S32205) and Super Duplex Steel S32750 / S32760 (UNS S32750/S32760) forged pipe fittings. These grades provide superior toughness, excellent corrosion resistance, high pressure ratings, and reliable leak-proof performance for critical and safety-sensitive applications.
What manufacturing standards do Duplex Forged Pipe Fittings comply with?
Our Duplex and Super Duplex Forged Pipe Fittings are manufactured in compliance with ASTM A182 / ASME SA182 for material specifications and ASME B16.11, MSS SP-79, MSS SP-83, MSS SP-95, and BS 3799 for dimensional standards. They are ISO 9001:2015 certified with PMI, NDT, and Third Party Inspection.
What types of Forged Pipe Fittings do you offer in Duplex and Super Duplex materials?
We supply a complete range including elbows, tees, concentric reducers, eccentric reducers, caps, crosses, long stub ends, short stub ends, and pipe bends. Customized dimensions are also available on request.
Which industries use Duplex and Super Duplex Forged Pipe Fittings?
These fittings are widely used in offshore drilling, desalination plants, chemical processing, petrochemicals, oil & gas, marine engineering, power generation, and pulp & paper industries. They are designed to perform reliably under high pressure, high temperature, and aggressive corrosive environments.
What is the difference between Duplex S31803, S32205, and Super Duplex S32750/S32760?
Duplex S31803 offers balanced ferrite-austenite structure with excellent resistance to pitting and stress corrosion cracking. S32205 is an improved version with enhanced corrosion resistance and higher PREN values. Super Duplex S32750 and S32760 provide PREN > 40 with very high strength, exceptional pitting resistance, and superior performance in extremely corrosive environments like offshore and subsea applications.
What testing and inspection do you perform on Duplex Forged Pipe Fittings?
Our forged pipe fittings undergo rigorous quality checks including radiography testing (RT), ultrasonic testing (UT), hydrostatic testing, visual and dimensional examination, chemical composition analysis, and mechanical property testing. This ensures material compliance with strict industry standards and eliminates defects like misalignment, surface irregularities, and dimensional inconsistencies.
Why choose Ratnadeep Steel for Duplex and Super Duplex Forged Pipe Fittings?
Ratnadeep Steel & Engg. Co. is a renowned manufacturer, exporter, and supplier based in Mumbai, India. We offer factory pricing, top quality, custom sizes, and timely delivery. Our fittings are precision-engineered using advanced forging techniques with rigorous quality inspection, making us a trusted global supplier of high-performance duplex and super duplex forged fittings.
Our Forged Pipe Fittings are manufactured using advanced forging processes and undergo stringent quality checks to ensure exceptional strength, durability, and long service life. Each fitting is meticulously inspected using key NDT techniques such as radiographic testing (RT), ultrasonic testing (UT), hydrostatic testing, and visual/dimensional examination. We also conduct detailed chemical composition analysis and mechanical property testing to ensure material compliance with strict industry standards.
During the forging and finishing stages, every fitting is closely monitored to eliminate defects such as misalignment, surface irregularities, and dimensional inconsistencies. This guarantees perfect joint integrity and high-performance reliability in pipelines carrying high pressures, extreme temperatures, and corrosive media. All our forged fittings fully comply with ASME, ASTM, MSS-SP, and relevant international specifications, making them a trusted choice for critical piping systems worldwide.
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Looking for high-quality Duplex Steel S31803/S32205 and Super Duplex S32750/S32760 Forged Pipe Fittings? Fully compliant with ASTM A182 and ASME B16.11. Get in touch with us today.
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