Kanakratna Steelage Private Limited

Super Duplex Pipe is a high-performance stainless steel pipe manufactured from super duplex stainless steels (SDSS), which contain approximately 25% chromium, 7% nickel, 4% molybdenum, and nitrogen. This unique composition offers exceptional strength, superior corrosion resistance, and excellent toughness compared to standard austenitic and duplex stainless steels.

Super Duplex stainless steels provide:

• Double the strength of austenitic stainless steel (like 304, 316)

• Outstanding resistance to chloride-induced stress corrosion cracking (SCC)

• Excellent pitting and crevice corrosion resistance

• Durability in aggressive chemical and marine environments

This makes Super Duplex Pipe the preferred choice in offshore oil & gas, desalination plants, chemical processing, subsea equipment, pulp & paper, and power generation industries.

(Typical range for UNS S32750 / S32760)

• Chemical Composition Test (Spectro/PMI).

• Mechanical Testing: Tensile, hardness, and impact tests.

• Nondestructive Testing (NDT):

  • Ultrasonic Testing (UT)

  • Radiography (RT)

  • Eddy Current Test

• Hydrostatic Pressure Test.

• Intergranular Corrosion Test (IGC).

• Pitting Resistance Equivalent Number (PREN) Test.

Additional Information:

• Production Capacity: IN TONS
• Delivery Time: READY STOCK
• Packaging Details: The packaging of the product is done using an effective method of packaging. It all includes- • Shrink-wrapping • Bubble wrapping • Carton boxes • Wooden crates/pallets/boxes

Super Duplex Flanges are critical components in piping systems designed for extreme durability, high strength, and outstanding corrosion resistance. Manufactured from Super Duplex stainless steels (typically grades UNS S32750 / S32760, also known as 2507), these flanges combine the best characteristics of ferritic and austenitic microstructures.

Compared to standard stainless steels, Super Duplex flanges offer:

• Twice the strength of austenitic stainless steels (e.g., 304, 316)

• Superior resistance to chloride-induced stress corrosion cracking, pitting, and crevice corrosion

• Cost-effectiveness, since less material is required due to higher strength

• Long service life in aggressive environments such as seawater, offshore platforms, and chemical processing plants

Super Duplex flanges are available in a wide range of designs – weld neck, slip-on, blind, threaded, lap joint, socket weld, and orifice flanges – making them suitable for diverse industrial applications.

Super Duplex stainless steels used for flanges typically include UNS S32750 and UNS S32760.

Typical Composition (% by weight):

• Density: 7.8 g/cm³

• Melting Point: 1350 – 1400 °C

• Thermal Conductivity: 14 W/m·K

• Electrical Resistivity: 8.5 × 10⁻⁷ Ω·m

• Elastic Modulus: 200 GPa

• Thermal Expansion (20–100 °C): 13 µm/m·K

Super Duplex Flanges conform to:

• ASTM / ASME: A182 F53 (S32750), A182 F55 (S32760)

• DIN / EN: DIN 1.4410, EN 10222-5

• BS: BS 4504

• MSS-SP: 44, 79, 97, 95

• Size Range: ½" to 48" (DN15 – DN1200)

• Pressure Ratings: Class 150, 300, 600, 900, 1500, 2500 (PN6 – PN400)

• Face Types: RF (Raised Face), FF (Flat Face), RTJ (Ring Type Joint)

Additional Information:

• Production Capacity: WE HAVE TONS OF READY STOCK
• Delivery Time: DEPENDS ON ORDER QUANTITY
• Packaging Details: The packaging of the product is done using an effective method of packaging. It all includes- • Shrink-wrapping • Bubble wrapping • Carton boxes • Wooden crates/pallets/boxes

Super Duplex Hexagon Bars made from 2507 (UNS S32750) are advanced engineering materials designed for applications requiring extreme mechanical strength, superior corrosion resistance, and durability in aggressive environments. Unlike conventional stainless steels, Super Duplex 2507 offers a dual-phase microstructure (ferrite + austenite), giving it the combined benefits of both structures:

• Twice the strength of austenitic stainless steels (like 316/304)

• Excellent resistance to chloride-induced corrosion, stress corrosion cracking, and pitting

• Cost-effectiveness due to lower nickel and molybdenum content compared to super austenitic alloys

Hexagon bars, with their six-sided geometry, are widely used in machining, fastener manufacturing, marine equipment, chemical plants, and offshore oil & gas projects. The shape allows for better grip, machining ease, and high load-bearing capabilities.

The exceptional properties of Super Duplex 2507 Hex Bars are attributed to their carefully balanced chemical composition.

Typical Composition (% by weight):

• 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): ≤ 1.2%

• Silicon (Si): ≤ 0.8%

• Carbon (C): ≤ 0.030%

• Phosphorus (P): ≤ 0.035%

• Sulfur (S): ≤ 0.020%

• Iron (Fe): Balance

Super Duplex 2507 hex bars are significantly stronger than both austenitic and ferritic stainless steels.

Typical Mechanical Properties:

• Tensile Strength: 800 MPa min

• Yield Strength (0.2% offset): 550 MPa min

• Elongation: 15–25%

• Hardness: ≤ 310 HB

• Impact Toughness: Excellent, even down to -50 °C

• Density: 7.8 g/cm³

• Melting Point: 1350 – 1400 °C

• Thermal Conductivity: 14 W/m·K at 20°C

• Electrical Resistivity: 8.5 ×10⁻⁷ Ω·m

• Modulus of Elasticity: 200 GPa

• Thermal Expansion (20–100 °C): 13.0 µm/m·K

These properties ensure that 2507 hex bars perform reliably in high-temperature, high-pressure, and corrosive environments.

Super Duplex 2507 Hex Bars undergo stringent testing:

• Chemical Analysis (Spectrometry).

• Mechanical Testing: Tensile, hardness, impact.

• Corrosion Testing: ASTM G48 test for pitting.

• Non-Destructive Testing (NDT): Ultrasonic, radiographic, eddy current.

• Hydrostatic Testing.

• Dimensional and Surface Inspection.

Additional Information:

• Production Capacity: 50 TONS
• Delivery Time: READY STOCK
• Packaging Details: The packaging of the product is done using an effective method of packaging. It all includes- • Shrink-wrapping • Bubble wrapping • Carton boxes • Wooden crates/pallets/boxes

The evolution of modern engineering materials has been driven by the need to withstand aggressive environments, extreme pressures, and high chloride concentrations. Among the most reliable and high-performance materials are Super Duplex Stainless Steel (SDSS) alloys, which are a family of stainless steels that combine the best properties of austenitic and ferritic stainless steels.

Super Duplex Sheets are flat-rolled products manufactured from super duplex alloys such as UNS S32750, UNS S32760, and UNS S32950. These sheets are widely used in industries like oil & gas, desalination, chemical processing, pulp & paper, marine engineering, and structural applications.

Their defining characteristic is the dual-phase microstructure, which provides a unique combination of:

• Excellent resistance to chloride-induced stress corrosion cracking (SCC).

• Superior strength (about twice that of 300-series stainless steels).

• Outstanding pitting and crevice corrosion resistance.

Typical Composition of UNS S32750 (SAF 2507):

• Mechanical Tests: Tensile, hardness, impact.

• Corrosion Testing: ASTM G48 pitting tests.

• Non-Destructive Testing (NDT): Ultrasonic, radiography.

• PMI (Positive Material Identification): XRF/spectrometry.

• Metallographic Examination: Ensures phase balance.

• Dimensional Checks: Thickness, flatness, tolerances.

Additional Information:

• Production Capacity: IN TONS
• Delivery Time: READY STOCK
• Packaging Details: The packaging of the product is done using an effective method of packaging. It all includes- • Shrink-wrapping • Bubble wrapping • Carton boxes • Wooden crates/pallets/boxes

Additional Information:

• Production Capacity: IN TONS
• Delivery Time: READY STOCK
• Packaging Details: The packaging of the product is done using an effective method of packaging. It all includes- • Shrink-wrapping • Bubble wrapping • Carton boxes • Wooden crates/pallets/boxes