While both 304 and 316 grade stainless steels are resistant to corrosion, 316 grade stainless steel provides a higher degree of corrosion resistance than 304 grade steel because it includes molybdenum in its composition. 304 grade stainless steel is considered to be austenitic, while 316 grade stainless steel is considered to be superaustenitic β meaning it contains a higher content of molybdenum, nitrogen and nickel, making it more resistant to corrosion and stress. This type of steel is incredibly common about 70% of stainless steel products are composed of austenitic steel. Austenitic steel β also known as 300 series steel β contains 18% chromium and 8% nickel. Steels are classified in part based on chromium and alloy content and crystalline structure. The first key difference between 304 grade stainless steel and 316 grade stainless steel relates to composition. Below is a basic guide to the similarities and differences of 304 grade and 316 grade stainless steel. Itβs 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. Metal hardware products are often composed of either 304 grade or 316 grade stainless steel. 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. These different classifications of steel are used to meet differing environmental and physical demands. Stainless steel hardware comes in a variety of grades and finishes.
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