SYMPOSIA PAPER Published: 01 January 1998

Progress in Bearing Performance of Advanced Nitrogen Alloyed Stainless Steel, Cronidur 30


The bearing rig tests performed in this study demonstrate superior bearing performance of Cronidur 30 steel over conventional bearing steels. In these tests the L10 life of Cronidur 30 steel as calculated by the DIN/ISO 281 method was 80 times the unfactored L10 life under full lubrication conditions. In boundary lubrication conditions, the Cronidur 30 steel demonstrated the L10 life capability typical of EHD lubrication conditions, whereas the other steels showed drastically reduced lives. In tests with predamaged races and boundary lubrication conditions, Cronidur 30 demonstrated 8 times the calculated L10 life, whereas the conventional steels exhibited further reduce in lives. The improved performance of Cronidur 30 steel over conventional bearing steels is attributed to its unique compositional formulation and microstructure that results in provision of balanced properties in the alloy — hardness, toughness, and corrosion resistance.

Author Information

Trojahn, W
FAG, OEM and Handel GmbH, Schweinfurt, Germany
Streit, E
FAG Aircraft and Super Precision Bearings GmbH, Schweinfurt, Germany
Chin, HA
, West Palm Beach, Florida
Ehlert, D
, West Palm Beach, Florida
Price: $25.00
Contact Sales
Reprints and Permissions
Reprints and copyright permissions can be requested through the
Copyright Clearance Center
Developed by Committee: A01
Pages: 447–459
DOI: 10.1520/STP12144S
ISBN-EB: 978-0-8031-5381-3
ISBN-13: 978-0-8031-2421-9