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The Difference between 316 Stainless Steel and 304 Stainless Steel

时间:2021-01-29 15:42:40 来源:本站

Each material has its own performance characteristics and advantages. The stainless steel required for various purposes should have the corresponding stainless steel material. Stainless steel is indispensable in the machine manufacturing industry. Professional personnel are required when determining the machine material. The material of stainless steel is determined through the combination of environment, use and other requirements. Let us take a look at the specific differences between 304 and 316 stainless steel. In order to better choose the most suitable material according to the needs.

Different machines use different stainless steel materials. Even the same machine, the choice of stainless steel material is different. Take the capsule counting machine as an example. The material contacting part is made of 316, such as hopper, vibrating plate, and discharge port. To prevent material corrosion. The appearance of the machine is made of 304 stainless steel, which has the advantages of neat appearance, wear resistance, easy cleaning and easy maintenance.

automatic tablet counting machine

Corrosion Resistance of 316 Stainless Steel

316L is widely used in the chemical industry due to its excellent corrosion resistance. 316L is also a derivative steel of 18-8 type austenitic stainless steel, with 2 to 3% Mo element added.

The Mo content of 316L makes the steel have excellent pitting resistance and can be safely used in environments containing halogen ions such as Cl-.

304 Stainless Steel

304 stainless steel is a common material in stainless steel, with a density of 7.93 g/cm³. It can withstand high temperature of 800℃, has good processing performance and high toughness. It is widely used in industry and furniture decoration industry and food and medical industry.

304 is a versatile stainless steel, which is widely used to make equipment and parts that require good overall performance (corrosion resistance and formability). In order to maintain the inherent corrosion resistance of stainless steel, steel must contain more than 18% chromium and more than 8% nickel.

The Ni element in 304 stainless steel is very important, which directly determines the corrosion resistance and value of 304 stainless steel.

The most important elements in 304 are Ni and Cr, but they are not limited to these two elements. Specific requirements are stipulated by product standards. The common judgment in the industry is that as long as the Ni content is greater than 8% and the Cr content is greater than 18%, it can be considered as 304 stainless steel.

Reasons Why 304 Stainless Steel Will Rust

1. Chloride ions are widespread, such as salt/sweat traces/sea water/sea breeze/soil and so on. Stainless steel corrodes quickly in the presence of chloride ions, even more than ordinary low carbon steel. Therefore, there are requirements for the use environment of stainless steel, and it needs to be wiped frequently to remove dust and keep it clean and dry.

2. The alloy elements are not dissolved into the matrix, resulting in low alloy content in the matrix structure and poor corrosion resistance.

The Difference between Stainless Steel 304 and 316

1.304 stainless steel has good processing performance and high toughness.

2.316 stainless steel has good corrosion resistance, atmospheric corrosion resistance and high temperature strength.

3.304 stainless steel is widely used in industry and home decoration industry and food and medical industry.

4.316 stainless steel is used in seawater equipment, chemical, dye, paper, fertilizer and other production equipment.

The density of 5.304 stainless steel is 7.93g/cm³. The density of 316 stainless steel is 8.03g/cm3.

6. The main difference between 316 and 304 in chemical composition is that 316 contains Mo.


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