Fe-15Mn-4Si-10Cr-8Ni High Fatigue Resistant Alloy

Basic properties and applications of Fe-15Mn-4Si-10Cr-8Ni alloy

We thought that a steel damper with excellent fatigue durability was needed to cope with long-period ground motion, huge earthquakes, and multiple large-scale earthquakes, and developed an FMS alloy* with fatigue durability about 10 times higher than conventional steel materials.(2017 patent registration)
 

Excellent fatigue durability

・Low cycle fatigue life is about 10 times that of low yield point steel (LY225)

1）I. Nikulin, T. Sawaguchi, A. Kushibe, Y. Inoue, H. Otsuka, K. Tsuzaki, Effect of strain amplitude on the low-cycle fatigue behavior of a new Fe-15Mn-10Cr-8Ni-4Si seismic damping alloy, Int. J. Fatigue 88(2016)132-141.
2）L. Yang, Y. Gao, G. Shi, X. Wang, Y. Bai, Low cycle fatigue property and fracture behavior of low yield point steels, Const. Build. Mater. 165(2018)688-696
 

Other notable characteristics

・Charpy absorption energy is higher than 250J at -196℃ to 100℃.

Applications

・Shear panel type dampers and brace type dampers those use this alloy as the core material are applied to JP Tower Nagoya and Aichi International Exhibition Center respectively.
 

Shear panel type damper applied to JP Tower Nagoya

 

Reference materials

●Press release on May 13, 2014 "Shear panel type damper using FMS alloy has been adopted for JP Tower Nagoya"

Developed a seismic damper for buildings using a new alloy with the world's highest fatigue durability（in Japanese)　
Discovery of new fatigue relief mechanism and breakthrough in manufacturing technology(in Japanese)　

●Received the Architectural Institute of Japan Award (Technology) on April 18, 2016 (reference video in Japanese)

Brace type damper applied to Aichi International Exhibition Center

 

 

External link: Developed seismic dampers with approximately 10 times greater fatigue durability(16 pieces applied to Aichi International Exhibition Center)　

Reference materials 

●Press release on August 30, 2019 "Brace type seismic damper using FMS alloy has been adopted at Aichi International Exhibition Center"

Brace type is now available for seismic dampers, which have about 10 times the fatigue durability of conventional steel materials(in Japanese)  
Manufacture of large FMS alloy rolled plates through continuous casting(in Japanese)  

●Manufacturing size (Please contact us for sizes other than the following)

・Thickness 8 ~ 34mm, width 1300 ~ 1500mm, length within 10m

●Obtained approval from the Minister of Land, Infrastructure, Transport and Tourism (November 16, 2022)
On November 16, 2022, we obtained approval from the Minister of Land, Infrastructure, Transport and Tourism as a material that complies with Article 37, Item 2 of the Building Standards Act for Fe-Mn-Si steels with 10 times the fatigue resistance, and were posted on the Ministry of Land, Infrastructure, Transport and Tourism website (certification number: MSTL-0584). （in Japanese）

●The 47th Technology Development Award from the Japan Institute of Metals and Materials (Fall 2024)
"Development of manufacturing technology for Fe-Mn-Si alloys with excellent low-cycle fatigue characteristics and their application to architectural vibration damping dampers," published by the Japan Institute of Metals and Materials in Vol. 63, No. 1 (2024) won the 47th Technology Development Award. （in Japanese） （in Japanese）

The English translation was also published in the "Technical Article" of the English journal "Materials Transactions" of the Japan Institute of Metals and Materials. （in English）

●Actual use example of FMS alloy seismic dampers:
Cross-section FMS alloy brace seismic dampers were applied to the Chunichi Building. （in Japanese）

In the tentative name “1-3 Nihonbashi Hon-cho project”, a plan to use CLT-reinforced FMS alloy seismic damping walls for the largest and tallest wooden rental office building in Japan has been announced. （in Japanese）

Cross-section FMS alloy brace dampers were applied to The Landmark Nagoya Sakae. （in Japanese）

H-section FMS alloy brace dampers were applied to Nagase Sangyo's Tokyo headquarters building. （in Japanese）

FMS alloy lens dampers were applied to the new hall of the Densetsu Industrial Health Insurance Association. （in Japanese）

We have summarized the application destinations of FMS alloy seismic dampers that have been announced by December 2025. （in Japanese）
 

List of papers

Papers on FMS alloys and seismic dampers using FMS alloys