No — stops inside steel a36 (reaches 4 mm of a 6 mm barrier)
Penetration depth
4 mm (0.1″)
Impact velocity
500 m/s (1640 fps)
Muzzle energy
3538 J (2609 ft-lb)
Bullet behaviour
Intact
Fired at the muzzle, a representative 12ga Slug load (28.3 g, SLUG, 500 m/s) reaches roughly 4 mm (0.1 inches) into steel a36. It loses its energy before defeating a typical barrier of this material.
About Steel A36
Mild structural steel plate (~6 mm); car bodies are far thinner (~1 mm).