Same old VIP stuff.........

[JahJahwarrior]

Once you've seen cracks in the neck of a perfectly good looking 6351 tank in person, and photographs of what an explosion does to a building or person.... I would never fill one. My life is too valuable to waste because someone is too cheap to buy a new tank.

That said, I have also seen cracks in 6061 alloy tanks.

 

[oxyhacker]

It's not the cracks that are the problem, its what happens once they start and how fast it happens. No one, least of all Luxfer, says that 6061 alloy can't develop cracks. However, the 6061 tanks are designed to be "LBB" - leak before burst - so they shouldn't fail catastrophically, the way 6351 tanks can, and have.

Do I believe it? Ask me in ten years.

That said, I have also seen cracks in 6061 alloy tanks.