What is the best grade of stainless steel for the food industry?
The manufacturers of inputs or machinery for the food industry have very strict requirements that must be met to avoid product contamination. Each piece of metal of a specific stainless steel grade needs to be perfect to the smallest detail to ensure full compliance with food safety standards.
Many food manufacturers use trays of this metal in their food processing processes. However, what some might not realize is that not any type of stainless steel will work in this industry.
There are hundreds of different varieties of stainless steel on the market, each with its own unique combination of properties. This leaves the question: what is the best grade of stainless steel for the food industry?
The answer depends on the specific application for which the metal will be used. For example, a confectioner who makes chocolates will have very different performance needs than a processor that specializes in tomato sauces.
In the following article, we will mention two of the alloys that are normally ideal for most food grade applications: 316 grade stainless steel and 430 grade stainless steel.
316 stainless steel grade
The 316 stainless steel grade is an alloy that has a high chromium and nickel content. In addition, it belongs to the family of austenitic stainless steels. Like many alloys, it has a higher continuous use temperature than food manufacturing processes require (more than 800 ° C or 1472 ° F).
What makes grade 316 alloy the ideal material for plates or food trays is the fact that it has a high resistance to acids, alkalis and chlorides (such as salt).
Other austenitic stainless steels, such as 304 SS grade, may experience severe pitting corrosion when exposed to salt, which is often present in food products.
430 stainless steel grade
As an alloy, the 430 stainless steel grade is very similar to 316. It has the same chromium content, but only a fraction of the nickel content, which makes it a more affordable alternative for some food manufacturers.
Another important difference between 430 and 316 stainless steel grades is that the 430 SS grade is a ferritic alloy, which means it is magnetic by default.
Ferritic alloys, such as grade 430 SS, also have extraordinary resistance to stress corrosion cracking (the growth of crack formations that can cause sudden failures in corrosive environments).
The 430 SS grade has a strong resistance to nitric and organic acids. It is also often used in applications where prolonged contact with slightly acidic compounds is a concern.
The alloy also has a resistance to sulfur and oxidation. However, due to the low nickel content, it is not as resistant to some dilute acids as would be the grade of 316 stainless steel.
Many food manufacturers use trays of this metal in their food processing processes. However, what some might not realize is that not any type of stainless steel will work in this industry.
There are hundreds of different varieties of stainless steel on the market, each with its own unique combination of properties. This leaves the question: what is the best grade of stainless steel for the food industry?
The answer depends on the specific application for which the metal will be used. For example, a confectioner who makes chocolates will have very different performance needs than a processor that specializes in tomato sauces.
In the following article, we will mention two of the alloys that are normally ideal for most food grade applications: 316 grade stainless steel and 430 grade stainless steel.
316 stainless steel grade
The 316 stainless steel grade is an alloy that has a high chromium and nickel content. In addition, it belongs to the family of austenitic stainless steels. Like many alloys, it has a higher continuous use temperature than food manufacturing processes require (more than 800 ° C or 1472 ° F).
What makes grade 316 alloy the ideal material for plates or food trays is the fact that it has a high resistance to acids, alkalis and chlorides (such as salt).
Other austenitic stainless steels, such as 304 SS grade, may experience severe pitting corrosion when exposed to salt, which is often present in food products.
430 stainless steel grade
As an alloy, the 430 stainless steel grade is very similar to 316. It has the same chromium content, but only a fraction of the nickel content, which makes it a more affordable alternative for some food manufacturers.
Another important difference between 430 and 316 stainless steel grades is that the 430 SS grade is a ferritic alloy, which means it is magnetic by default.
Ferritic alloys, such as grade 430 SS, also have extraordinary resistance to stress corrosion cracking (the growth of crack formations that can cause sudden failures in corrosive environments).
The 430 SS grade has a strong resistance to nitric and organic acids. It is also often used in applications where prolonged contact with slightly acidic compounds is a concern.
The alloy also has a resistance to sulfur and oxidation. However, due to the low nickel content, it is not as resistant to some dilute acids as would be the grade of 316 stainless steel.
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