F55 round tube’ is how Super Duplex UNS S32760 Round Tube is also referred to technically. Typically, it is a tubular product of premium quality that is specifically designed for severe service applications that require exceptional strength, durability, and corrosion resistance.
Besides, it is a piping component which has a PREN (Pitting Resistance Equivalent Number) above 40, which means that it offers ‘High’ resistance to pitting, crevice corrosion, and stress corrosion cracking. Specifically, in chloride rich environments. It is manufactured in compliance with the ASTM A789 standard.
At Vishal Tube, a leading Super Duplex UNS S32760 Round Tube manufacturer in India we offer you with great pride a high-quality Super Duplex UNS S32760 Round Tube that delivers ‘High Performance’. Also, we have engineered it with ‘Precision’ for severe service environments. Our F55 round tube is designed to deliver exceptional strength, corrosion resistance, and durability.
Above all, our goal is to present to you a Super Duplex UNS S32760 Round Tube that delivers the reliability and toughness required for long-term success.
A F55 round tube or Super Duplex UNS S32760 Round Tube like most piping and tubing components have a few essential features. They are given below:
The important specification details of Super Duplex UNS S32760 Round Tube is given in the tabular form below:
Property | Specification |
Material Grade | Super Duplex Stainless Steel UNS S32760 |
Standards | ASTM A789 / ASTM A790 / ASME SA789 / SA790 |
Form | Round Tube |
Outer Diameter (OD) | 6.00 mm – 219.10 mm (or custom sizes) |
Wall Thickness | 0.5 mm – 20.0 mm (as per requirement) |
Length | Up to 6 meters (custom cut lengths available) |
Density | 7.8 g/cm³ |
Tensile Strength | ≥ 750 MPa (min) |
Yield Strength (0.2% Proof) | ≥ 550 MPa (min) |
Elongation | ≥ 25% |
Hardness | ≤ 28 HRC |
Impact Strength | ≥ 60 J (at -46°C) |
Corrosion Resistance | Excellent pitting & crevice corrosion resistance (PREN > 40) |
Microstructure | 50% Ferrite, 50% Austenite |
Heat Treatment | Solution Annealed at 1100–1150°C, followed by rapid cooling |
Weldability | Good (recommended post-weld solution annealing for high stress applications) |
Applications | Offshore oil & gas, chemical processing, marine, heat exchangers, pressure vessels |
Usually, a Super Duplex UNS S32760 Round Tube is specifically designed for severe service environments. Hence, a F55 round tube is used as an application in a wide range of industries. They are as given below:
Usually, a F55 round tube also known as Super Duplex UNS S32760 Round Tube comply to the following quality assurances and certifications given in the table below:
Parameter | Details / Standards |
Material Grade | Super Duplex Stainless Steel UNS S32760 (F55) |
Applicable Standard | ASTM A789 – Seamless and Welded Ferritic/Austenitic Stainless Steel Tubing |
PREN Value | > 40 (Typically 41–45) – Excellent pitting and crevice corrosion resistance |
Service Suitability | Offshore, chemical processing, marine, and severe service applications |
Corrosion Resistance | Exceptional – Suitable for chloride-rich and acidic environments |
Strength & Durability | High strength, toughness, and fatigue resistance; durable in harsh conditions |
Heat Treatment | Solution Annealed and Rapid Quenched |
Hydrostatic Testing | Mandatory as per ASTM A789 requirements |
Non-Destructive Testing (NDT) | Eddy Current Testing, Ultrasonic Testing, PMI (Positive Material Identification) |
Certifications | EN 10204 3.1 / 3.2, ISO 9001:2015, PED 2014/68/EU, NORSOK M-630/MDS D55 (on request), API 5LC (if applicable) |
Third-Party Inspection | Available (Lloyd’s, DNV, TUV, SGS, BV, etc.) |
Weld Seam Integrity | 100% Weld Seam Tested (for welded tubes) |
Surface Finish Options | Pickled, Passivated, Bright Annealed |
Dimensional Tolerances | As per ASTM A789 or as specified by client |
There are many reasons why you need to decide on Super Duplex UNS S32760 Round Tube from Vishal Tube, a first Super Duplex UNS S32760 Round Tube manufacturer in India. . They are as given below:
Since Super Duplex UNS S32760 Round Tube have PREN 40+ they generally offer excellent resistance to pitting, crevice, and chloride-induced corrosion. Hence they are ideal for severe service conditions. It is the strength and durability of this tube type that helps maintain integrity under high pressure and in aggressive media.
Yes, all Vishal Tube’s F55 round tubes comply completely with ASTM A789 specifications.Usually, rigorous quality control over this tube type is undertaken. These include hydrostatic testing and various non-destructive tests. Some of them include eddy current and ultrasonic testing. This is mainly to ensure that they meet or exceed industry standards for mechanical strength, corrosion resistance, and dimensional accuracy.
Usually, UNS S32760 round tubes are the most strongest and durable duplex stainless steel tubes available. They usually offer high yield strength, excellent toughness, and superior fatigue resistance. A major reason why they are ideally suited for severe service in offshore drilling rigs, subsea systems, and chemical refineries.
Vishal Tube Industries, is engaged in manufacturing of Stainless Steel Seamless Tubes, Stainless Welded Tubes and Stainless Steel U tube outfitting the requirements of many large and medium scale industries from all over the globe qualitatively.