Thickness of 304 stainless sheet to avoid puncture

[Nick P]

Designing a cylinder using Stainless Steel 304 and am trying to figure out the minimum thickness of the outer wall of the cylinder to avoid being puncture by a 6in diameter steel bar after falling 1 meter onto the bar.

Cylinder will weigh approximately 5500kg.

 

[huntoon]

What is the outer diameter of the cylinder?

 

[Nick P]

0.7512 meters

 

[Nick P]

What I have right now... is that

S_yp,SS304=206.8MPa

F=π(.075m)²*206.8E6 = 3.66MN

and relating that to the current thickness we have at 5cm

σ=\frac{3.66MN}{.15m*.05m}=488MPa

And 488MPa < S_ut,SS304 with S_ut,SS304=517.02MPa

But I'm pretty positive I'm making some logical error here.