It is commonly stated that “stainless steel is non-magnetic”. This is not strictly true and the real situation is rather more complicated. The degree of magnetic response or magnetic permeability is derived from the microstructure of the steel. A totally non-magnetic material has a relative magnetic permeability of 1. Austenitic structures are totally non-magnetic and so a 100% austenitic stainless steel would have a permeability of 1. In practice this is not achieved.2017-08-22
When selecting stainless steel hardware, it is important to understand the differences between the variety of grades and finishes available so you can choose the products that will work most safely and effectively for your purposes.
It's difficult to distinguish between these two types of steel visually, but significant differences between the two steel types do exist and are important to understand.
Below is a basic guide to the similarities and differences of 304 grade and 316 grade stainless steel.
Stainless steel's are divided into grades (and sub grades) which are determined by their specific constituent elements e.g Chromium and Nickel; these grades help identify whether that steel is more or less suitable for any given application and ,for example in guidance on the materials corrosion resistance, mechanical or thermal performance or machinability.2017-12-15
Stainless steel is short for stainless acid-resistant steel. Weak corrosive media such as air, steam, water or the steel with rust resistance is called stainless steel.
Each stainless steel has good properties in its specific application fields. The key to success is first to clarify the usage, and then to determine the correct steel grade.