SPRON510 | High-Strength Co-Ni Alloy | Seiko Instruments Inc.

SPRON510 is a proprietary Co-Ni alloy developed through a collaboration between Seiko Instruments and the Institute for Materials Research, Tohoku University. Originally designed for mainsprings used in mechanical watches, it is characterized by high strength, corrosion resistance, and exceptional resistance to spring set.Combining excellent spring-back characteristics with non-magnetic properties, SPRON510 helps maintain stable spring performance and reliable operation over long service periods, even in demanding environments.

Tensile Test Results

Exhibits tensile strength exceeding that of SUS631-H. As a strain-aging alloy, its strength can be further enhanced by optimizing the cold working rate and heat treatment conditions.

Spring Performance Test Results

Shows minimal set (loss of elasticity) under both static and dynamic loading, enabling even micro springs to achieve high spring force. After 1 million cycles in a repeated fatigue test, the set ratio is approximately one-sixth that of piano wire.

Corrosion Resistance Test Results

Demonstrates superior corrosion resistance compared to SUS316L in tests using 48% hydrobromic acid (HBr) and 36% hydrochloric acid (HCl).

Non-Magnetic Properties

Exhibits extremely low magnetic permeability, with no significant variation even at higher levels of cold working.

Ideal for components used in measurement and analytical equipment where magnetic interference must be minimized.

dental devices
industrial machinery
MFC

SPRON510 is used in a wide range of high-reliability applications, including medical devices, precision machinery, semiconductor manufacturing equipment, and fluid control systems. Its combination of high strength, excellent spring-back characteristics, corrosion resistance, and non-magnetic properties makes it particularly suitable for components operating in harsh and corrosive environments. By helping improve durability, stability, and service life, SPRON510 contributes to the long-term reliability and quality of critical products and equipment.

For customers seeking materials that meet demanding performance requirements or facing challenges with the service life and corrosion resistance of existing materials, SPRON510 is available as a custom-made component manufactured to customer drawings and specifications.From material selection and prototype evaluation to production launch, we provide comprehensive support and propose optimized solutions that take full advantage of the unique properties of the Co-Ni alloy SPRON510.SPRON510 addresses demanding requirements for durability, corrosion resistance, spring performance, and reliability, helping customers achieve solutions that are difficult to realize with standard materials or catalog products.