The drastic temperature difference causes the metal to expand and contract at different rates and your cookware may bend out of shape or bulge in the centre. As a result, the pan wouldn't heat evenly or oil may pool to the sides.
The 304-grade stainless steel used for cookware contains 18% chromium and 8% nickel. When you cook acidic food, they could leach chromium and nickel into your food. This happens especially when your cookware is new.
Always preheat the cookware on a medium flame for 1-2 minutes. At this point, if you sprinkle water, they will roll as droplets. Now, add sufficient oil and heat till it starts gleaming. This helps build a temporary seasoning. So, when you add food, it doesn't stick too much to the bottom.
Pitting on stainless steel surfaces is a common and irreversible issue caused by a reaction between water, salt, and chromium in the steel. To prevent it, avoid adding salt until the water in stainless steel cookware is boiling; this reduces oxygen availability and inhibits pitting.
To remove heat tints or white limescale deposits on stainless steel, mix equal parts water and vinegar, then gently rub the solution onto the cookware with a cloth or non-abrasive scrub.
To clean stubborn burnt residues from cookware, generously sprinkle baking soda onto the bottom, ensuring it covers the burnt areas. Add enough water to fully submerge the residue and bring it to a simmer. Reduce the heat, gently scrape the residue with a wooden spatula, and watch it easily come off. Turn off the heat, let it cool, and then clean as usual with mild dishwashing soap and a non-abrasive scrub.
Stainless steel leaches small quantities of nickel into food, especially when it is new. This is well within the permissible levels for most people. However, if you are allergic to nickel, avoid using stainless steel or opt for nickel-free stainless steel.
Cast iron is considered the most durable cookware.But good quality triply stainless steel pan doesn't fare far behind. If you take proper care of it, it can last decades with minimal wear and tear.