I am working with 3/16" 304 stainless. I forgot to pickup 4 1/2 wheels for stainless at my LWS , so when I was in Rural King I bought one cheap Buffalo brand and another Forney brand.
Long story short, the Buffalo shattered, it just missed my head. The pieces hit both sides of the garage and my tig. My right hand got a few hits. Just blood, nothing more, very lucky.

The cheap wheel ad string reinforcing on the top and the bottom, not through out.

I knew better, I only use the good, or at least better, quality wheels.
A few bucks saved is not worth it, not to mention the el cheapos go away fast.