Is It Possible to Use Body Hair and Implant Them on the Chest Area?

You can transplant hairs to your chest. There have been several patients who request this.  Hair transplant surgery is basically moving hair from one location to another location.  

While the answer is yes-  body hair FUE grafts can be transplanted into the scalp -  it is usually not the best source of donor hairs (scalp hair is) but can be used on those who have little donor scalp hair left.

yes it is possible, perhaps you also will get multiple  small scars but might be hidden after hair gowing

si claro que se puede colocar donde quieras  pero a cambio de  pequeñas cicatrices que se ocultan luego con el crecimiento del pelo

Hair from other parts of the body like arms,
chest, legs, pubic hair and beard hair has been used for hair transplant when a
person runs out of good scalp donor hair. As I said, you should first use your scalp hair because it is better hair and grows for a longer period of time. 

It would be possible to take body hair from other areas and transplant it to the chest. The FUE approach could be applied to this. If body hair is in abundance, this would not be too unreasonable for a man who is generally hairly but has no hair on his chest. I have never seen such a patient but perhaps you are one. Body hair grows to a limited length whereas scalp hair grows ad infinitum. There are differences in texture and density .  Body hair usually is abundant in bald men.