There are lots of exercises you can do on chest day. But here I have mention only few popular exercise for build muscular chest. For Support your workout with a solid diet and a few must-have supplements for Mass gain, such as whey-protein Powder & Mass gainer, and you’ll bust through performance plateaus in no time.
Flat Bench Dumbbell Press
With dumbbells, each side of your body must work independently, dumbbells are harder to control than a barbell. Dumbbells also allow for a longer range of motion than the barbell bench press, both at the bottom and top of the movement .You can do flat dumbbell presses before do chest workout for heavy sets in lower rep ranges.


Machine Decline Press
Machine decline press workout, you can sit sideways on the apparatus and press across your body one arm at a time, which delivers a completely different feel than when you sit straight-on .You can also do free-weight exercises because they require more effort and stabilizer muscles than machines. Keep in mind , this could be the last multi-joint exercise in your routine.


Incline Dumbbell Press
Incline Dumbbell Press hitting a muscle from different degrees of incline angles build it fast. So everybody’s choose this exercise for muscle building. Incline press is popular exercise for your daily routine and start this exercise with less weight.
Dumbbell Squeeze Press
It is another popular exercise which includes in your daily routine for muscle building. During squeeze exercise make sure the dumbbells stay in contact with each other. Lower the weights to the sides of your chest, and then push them back up to the starting position.

References
Barnett, C., Kippers, V., & Turner, P. (1995). Effects of Variations of the Bench Press Exercise on the EMG Activity of Five Shoulder Muscles. Journal of Strength and Conditioning Research, 9(4), 222.