That’s the right way to think about it - it comes in different grades based on the expected level of exposure to things like strong acids or bases but it’s not

That’s the right way to think about it - it comes in different grades based on the expected level of exposure to things like strong acids or bases but it’s not magic. You can especially see this in appliances where stainless steel was marketed as a premium product but the cheaper lines (or cheaply-made / expensively-marketed) are much less durable than the painted metal they used to use.