SS2507 Pipe

1. Standard: ASTM A789, ASME SA789, ASTM A790, ASME SA790
2. OD: 1/2″ - 36″ (13.7 mm - 914.4 mm)
3. Thickness: 0.3 mm - 50 mm
4. End: Plain End, Beveled End, Treaded
5. Grades: 2507,UNS S32750, WNR.1.4410

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Product Introduction

An SS2507 pipe is made from an advanced alloy comprised roughly of a 50/50 balance of ferritic and austenitic steel grains. This structural composition is specifically engineered to harvest the best traits of both metallurgical worlds: the stress-crack resistance of ferrites combined with the general workability and corrosion defense of austenites. HT PIPE is a super duplex 2507 Pipe supplier with 15+ export experience. Contact us for more information and quotes for free!

Product Forms

Bar & Rod

Plate & Sheet

Coil & Strip

Pipe & Tube

Fitting: Flange, Tee, Elbow, Reducer etc.

Forging: Ring, Shaft, Circle, Block etc.

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Core Engineering Specifications

When sourcing materials for demanding regional infrastructure projects-whether for deep-well geothermal plants or localized wastewater treatment centers-understanding the exact dimension and pressure capacities of super duplex material is essential.

Metric / Attribute	Seamless Construction	Welded / EFW Construction
Common Specifications	ASTM A790, ASME SA790	ASTM A928, ASME SA928
Outer Diameter (OD)	0.5" to 16" (Varies by mill)	2" to 36" or larger
Wall Thickness / Schedule	SCH 10S, 40S, 80S, 160, XXS	SCH 5S, 10S, 40S
Yield Strength (0.2% Offset)	Minimum 550 MPa (80 ksi)	Minimum 550 MPa (80 ksi)
Tensile Strength	Minimum 795 MPa (116 ksi)	Minimum 795 MPa (116 ksi)

Key Performance Advantages

1. Wall Thickness Reduction (Weight Savings)

Because SS2507 boasts nearly double the yield strength of standard 316L austenitic stainless steel, engineers can design systems with significantly thinner pipe walls. Thinner walls mean less total steel weight per foot, which drastically simplifies shipping logistics and cuts structural load limits on offshore platforms or suspended industrial pipe racks.

2. Resistance to Chloride Stress Corrosion Cracking (SCC)

Standard stainless grades often suffer catastrophic, sudden fracturing when exposed to tensile stress in warm, chloride-rich settings. The ferritic component within SS2507 provides continuous protection against chloride SCC, making it virtually immune in typical ambient marine settings.

3. Erosion and Cavitation Defense

In high-velocity fluid networks-such as desalination high-pressure reverse osmosis systems-the combination of high mechanical hardness (typically around 310 Brinell) and corrosion defense stops both chemical erosion and physical wear simultaneously.

Where SS2507 Pipes Are Deployed Globally

Super duplex piping systems serve as the structural backbone across several demanding heavy-industrial sectors:

Offshore Marine Platforms: Subsea piping manifolds, umbilical lines, process water systems, and fire protection loops constantly battered by ocean spray.

Desalination Plants: High-pressure brine recirculation networks and reverse osmosis setups where salt concentrations destroy lower-tier metals.

Chemical Processing & Petrochemical Plants: Transport systems dealing with aggressive organic and inorganic acids (like formic, acetic, or dilute hydrochloric acids).

Flue Gas Desulfurization (FGD): Scrubber units and absorber towers within power generation stations handling highly corrosive, acidic exhaust slurries.

Critical Fabrication and Welding Guidelines

Working with super duplex alloys requires specialized procedural controls. If handled like basic carbon steel, the metal's performance can easily be compromised.

The Thermal Balancing Act

Welding an SS2507 pipe requires preserving that exact 50/50 balance of ferrite and austenite. If the weld area cools too quickly, the structure becomes excessively ferritic, lowering toughness. If it cools too slowly, dangerous intermetallic phases (like sigma phase) precipitate, ruining corrosion resistance.

Filler Metal Choice: Always utilize over-alloyed filler materials (typically designated as 2507/P100 or matching super duplex wires enriched with 2-3% extra nickel) to ensure the weld pool solidifies with the proper phase ratio.
Heat Input & Interpass Controls: Maintain strict control over heat input (ideally between 0.5–1.5 kJ/mm) and ensure interpass temperatures stay below 150°C (300°F) to avoid thermal degradation.
Post-Weld Treatment: For heavy cold-formed elements or critical joints, a full solution annealing process at a minimum of 1050°C (1925°F) followed by a rapid water or forced-air quench re-establishes peak alloy performance.