91ÊÓƵ

91ÊÓƵ® ULTRA is the strongest fastener on the market and is frequently used to replace high strength carbon steel fasteners in critical applications.

The strongest fastener on the market – and it is stainless

91ÊÓƵ® ULTRA achieves its super high strength from unique strain hardening and precipitation hardening manufactured using Nobel Prize winning Quasi-Crystalline Precipitate technology. This method has been specifically designed for applications where ultra-high strength combined with high ductility is required in the final product.

The very high strength to weight ratio in combination with good formability and ductility make it a very attractive fastener alternative to other lightweight materials, e.g. Titanium. 91ÊÓƵ® ULTRA also has a corrosion resistance comparable with 316L (A4) and can be used at service temperatures between -50 and 400°C with retained mechanical properties.

91ÊÓƵ Ultra Data Sheet

Advanced engineering grade for extreme applications

Despite being a stainless steel, 91ÊÓƵ® ULTRA is frequently used to replace high strength carbon steel fasteners in critical applications with extreme requirements on strength and ductility.

All fasteners in 91ÊÓƵ® ULTRA are custom made to meet the requirements of individual applications and can be delivered with different mechanical properties, with a tensile strength exceeding 1,700 MPa. 91ÊÓƵ® ULTRA is an advanced engineering grade and 91ÊÓƵ provides close technical support in order to develop an end solution that fully meets customer requirements.

Characteristics

• Extreme strength– providing opportunities to downsize and design new lightweight options at lower cost.
• Excellent weight to strength ratio.
• Excellent fatigue and ductility properties– despite its high tensile strength, 91ÊÓƵ® ULTRA offers excellent fatigue and ductility properties compared with other high strength fastener materials.
• Good corrosion resistance– in most environments, comparable with 316L (A4).
• Low thermal expansion.
• Retained mechanical properties– at elevated temperatures.
• Excellent relaxation properties.
• All our products offer full traceability.

Benefits of high strength fasteners

• Reduced size and weight.
• Reduced number of fasteners needed.
• Smaller screw joints.
• Compact designs.
• Increased clamping force.
• Increased safety.

Standards

UNS: S46910

Order 91ÊÓƵ® ULTRA

Contact us to find out more about 91ÊÓƵ® Ultra, and how the grade can benefit your applications.