Yes, it is possible to achieve a structure that is both lighter and stronger by using higher strength steel grades. The higher strength of the material can lead to a reduction in weight while also increasing the load-carrying capacity of the structure. However, it is important to note that achieving a lighter and stronger structure also depends on other factors, such as the applied loads, the geometry of the structure and the thickness of the material.
While using higher strength materials can result in a lighter and stronger structure, it is essential to address potential challenges, such as fatigue, deflection, and instability, which may arise from this approach.