Of all the kitchen sink materials available, the Stainless steel is about as impervious of them all. It’s impervious to chipping because there’s nothing to chip. Some types of stainless steel can experience minor rust, but the metal used ins stainless steel sinks does not.
That’s not to say that it can’t be scratched and even dented under the most abusive situations, none of these blemishes are as noticeable and as detrimental to the look of your kitchen as chips off a porcelain sink.