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NORSOK Approved UNS32760 Super Duplex Bars
For high-integrity offshore projects, material selection is critical. When fasteners and structural components are exposed to harsh marine environments, reliability, durability and compliance with industry standards are non-negotiable.
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At Offshore Stainless Supplies, we are proud to be the UK’s only NORSOK approved D59 manufacturer, specialising in UNS32760 Super Duplex strain-hardened bars produced to MDS D59/D59L Rev 3 specifications.

Understanding NORSOK Standards
The NORSOK standards were developed by the Norwegian petroleum industry to ensure safe, efficient and cost-effective operations in the North Sea oil and gas sector. These standards are globally recognised and highly respected for their rigour, providing technical guidelines on materials, fabrication, testing and quality assurance. They are designed to mitigate the risks associated with offshore operations, where failure can have catastrophic consequences in terms of safety, environmental impact and operational downtime.
By adhering to NORSOK MDS D59/D59L Rev 3, materials such as Super Duplex bars are certified to meet stringent mechanical properties, corrosion resistance and chemical composition requirements. Compliance with these specifications ensures that components will perform reliably under extreme pressures, temperature variations, and highly corrosive seawater environments. This is why NORSOK standards are considered a benchmark for excellence in offshore engineering worldwide.
Why Super Duplex Bars Matter
UNS32760 Super Duplex Stainless Steel offers exceptional strength, corrosion resistance and durability, making it ideal for fasteners and components in offshore, marine and industrial applications. The strain-hardening process applied to our cold drawn bars further enhances mechanical properties, providing high tensile strength, dimensional accuracy and excellent fatigue resistance.
Our bars undergo rigorous quality control at every stage of production, including dimensional checks and material verification, ensuring consistency and reliability for critical applications. With precise engineering and adherence to NORSOK standards, these bars can withstand the most demanding offshore conditions, including exposure to seawater, chlorides and fluctuating temperatures.
Expertise and Support You Can Trust
At Offshore Stainless Supplies, our team of experienced professionals provides technical guidance and support throughout your project. From material selection and specification advice to logistics and delivery coordination, we aim to make the process seamless and efficient.
Whether your project involves offshore platforms, subsea installations or marine equipment, we have the expertise, stock, and capabilities to supply high-quality cold drawn Stainless Steel and Super Duplex bars tailored to your requirements. Our commitment to excellence ensures that every bar we produce meets the highest standards of performance, durability and compliance.
Trust Offshore Stainless Supplies to provide precision-engineered materials that deliver strength, reliability and compliance for your most demanding offshore projects.
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