Swedish steel maker SSAB announced that SSAB Hämeenlinna product development engineer Mr Olli Oja, MSc (Tech), has investigated the Correlation between the Microstructure and Mechanical Properties of Intercritically Annealed Advanced High-Strength Steels in his doctoral dissertation. Mr Oja started working in his master’s thesis in 2009 in Raahe, where he worked in product development at the mill until 2014, when he switched to the Hämeenlinna Works and recently defended his doctoral dissertation at Tampere University in Finland.The research showed that the composition and heat treatment combinations of certain high-strength, cold-formable steels can be used to balance the microstructure and formability properties for different purposes. The results led to a formability map which indicates the link between the formability type and the microstructure. For customers, this can be seen by optimized formability and microstructural properties. The customers’ products become lighter and complex parts can be more easily formed. Advanced steels help to reduce dependence on fossil fuels.Mr Olli Oja says “My research focuses on silicon- and aluminum-alloyed high-strength, cold-formable steels, which are used particularly by the automotive industry. The steels examined in the research are part of the advanced high-strength steels family. The findings provide guidelines for the development of our future products and next generation steels.”Research and development of aluminum-alloyed steels continues in Hämeenlinna. The first tests were done in 2016 and a couple of years later we announced the first dual-phase high formability DH steels in production program. The steel is made at SSAB’s mill in Raahe, from where it comes by rail to Hämeenlinna for pickling, rolling and galvanizing. All SSAB’s galvanized products are made in Hämeenlinna.