Difference Between 316 and 304 Pipes

 

Stainless steel is one of the most commonly used materials in metal applications because of its strength, corrosion resistance, and cost efficiency. The types of stainless steel that are available are ferritic, austenitic, and duplex. It is important to note that stainless steels 304 and 316 are austenitic steels. Neither of them has a nickel content that exceeds 8%, but both of them have an 18% chromium content. It is worth mentioning that the 316 material contains molybdenum in its composition. In addition to containing 4% molybdenum, 316 material is also corrosion-resistant against chloride ions since it contains 4% molybdenum. 

 Carbon, iron, manganese, phosphorus, sulfur, and silicon are some of the elements that make up both materials. As far as density is concerned, both of them have a density of 8 grams per cubic centimeter. Compared to the 316 material, the 304 material is much easier to machine than the 316 material.

 What is the difference between 304 and 316 stainless steel?

There are a number of alloys containing chromium that are stainless steel. A stainless steel alloy contains chromium as an addition, which gives it the ability to withstand corrosion6 and falls under the authentic class. Since they belong to the austenitic class of stainless steel, their basic chemical makeup remains nearly similar, concerning the elements used. It is, however, the specificity of their chemistry that distinguishes the two grades from each other and makes them differentiated from one another. 

Nickel and chromium are the main components of both alloys. These elements are present in varying percentages, however, depending on the region. In stainless steel grade 304, for instance, the chromium content is 18% and the nickel content is 8%. Because of this, the alloy is also sometimes referred to as 18/8 stainless steel because the composition of the alloy is 18% chromium and 8% nickel. In contrast, alloy 316, which is also known as marine grade, contains about 16% of chromium in its alloy, which can also make the alloy suitable for the marine environment. 

The only difference between the chemical composition of the alloy and the stainless steel grade 316 alloy is the addition of molybdenum to the alloy in order to make it different from the stainless steel grade 304 alloy. Despite the fact that grade 304 contains trace quantities of molybdenum, alloy 316 contains a greater percentage of this element (2% to 3%) since it has a higher percentage of this element. 

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