Cracks Developing in Straight-Sided Stainless Steel Vessels
Stainless steel, as you would know, is an alloy with more than 80 percent iron, with chromium and nickel being the other components. Chromium brings shine and nickel brings elasticity to stainless steel.

Nickel is a costly alloy, it costs 20 times iron - and hence most low-grade stainless steel is made from zero to 2 percent nickel, when it should ideally be 8 percent for a good grade.

When buying stainless steel you can see the grades are marked on it. A mark of 18/8 (18 parts of chromium and 8 parts of nickel) is considered a good grade which will normally not crack.

I hope I was of help