Available online at www.sciencedirect.com ScienceDirect Materials Today: Proceedings 13 (2019) 229–234 www.materialstoday.com/proceedings 2214-7853© 2019 Elsevier Ltd. All rights reserved. Peer-review under responsibility of the scientific committee of The 6th International Conference on Advanced Materials Science and Technology 2018, 6th ICAMST. ICAMST 2018 The Effect of Ni on Mechanical Properties and Austempered Microstructure Developments in Cold Rolled Low Carbon Fe-Ni Lateritic Steels Muhammad Yunan Hasbi a,b* , Fatayalkadri Citrawati b , Myrna Ariati a a Department of Metallurgy and Materials Engineering, University of Indonesia b Research Center for Metallurgy and Materials, Indonesian Institute of Sciences Abstract In this study, the effect of Ni and cold rolling reduction in lateritic steels was examined. Three alloys with various Ni content were subjected to the cold rolling process. The austenization and austempering were performed to the sample followed by air cooled. It was revealed that blocky areas of ferrite and cementite become finer with higher Ni content. The grains found to grow surrounding the rolling band at higher deformation level. The XRD showed that the 70% reduction tends to increase the formation of the α phase. The strength and hardness increases as the Ni content and deformation increase. © 2019 Elsevier Ltd. All rights reserved. Peer-review under responsibility of the scientific committee of The 6th International Conference on Advanced Materials Science and Technology 2018, 6th ICAMST. Keywords: lateritic steels; austemper; cold rolled; nickel; mechanical properties 1. Introduction The most different thing between lateritic steels with conventional steels is lateritic steels based on nickel ore, which it has a 3-4% nickel content in it naturally [1]. This is certainly very profitable, considering nickel is one of the alloy element with a fairly expensive. Moreover, the availability of raw materials which are quite abundant in the * Corresponding author: Tel.: +62-21-7560911; fax: +62-21-7560553. E-mail address: muha135@lipi.go.id