The development of high-performing components is crucial in applications such as heavy vehicleautomotive powertrains. In these applications, strength, weight and thermal conductivity isessential properties. Key materials that may fulfil these requirements include cast irons of differentgrades where in terms of manufacturability and in particular, machinability pearlitic grades aredifficult due to hardness variation, where a fully ferritic matrix would provide an advantage. Toachieve maximum strength a fully ferritic and solid solution strengthened compacted graphite iron(CGI) would provide an interesting alternative to the automotive industry. In the current study, theeffect of Si level on mechanical properties in a fully ferritic material was investigated. The influenceof section thickness on tensile properties and hardness was investigated. The resulting materialwas fully ferritic with limited pearlite content. Section thickness influence on nodularity and hencethe mechanical properties were also investigated.