Question: are elongated man and plastic man the same

Answer: No, The Elongated Man's powers also greatly augment his durability. He is largely able to withstand corrosives, punctures and concussions without sustaining injury. It has been demonstrated that he is resistant to high velocities that would kill an ordinary person and that he is also more resistant to blasts from energy weapons that would kill ordinary humans. His physiology is more like that of an ordinary human than Plastic Man and as a result he does not share Plastic Man's nigh invulnerability.