Food machinery and equipment come into contact with various media under various conditions during the production process. In order to prevent food from being contaminated during these contacts and ensure the long-term use of the equipment, there is a great emphasis on the use of food machinery materials. Because this is related to food safety and people's physical health.

Half of the food machinery equipment belongs to light machinery equipment, and most of the components are subjected to relatively small forces. However, due to the requirement of minimizing the overall weight and volume of lightweight mechanical equipment, and minimizing the size of components, the mechanical performance requirements for materials are not reduced. In addition to strength, stiffness, and hardness, there are also some other requirements. For example, in food machinery and equipment, there are more opportunities to handle large quantities of finished items, so it is common to encounter components with high-speed reciprocating motion, and the performance of the components should be required from the perspective of fatigue strength.

Some components in food machinery and equipment often come into contact with a large amount of materials, and different materials can cause different damages to the components when in contact. For example, the high-speed impact between the hammer blade and hard materials can cause strong wear, therefore, the hammer blade requires high wear resistance of the material. The speed of relative movement between the screw and sleeve of the food extruder and the material is not high, but the working pressure is as high as 200MPa and the working temperature is also as high as 200 ℃. Therefore, this type of machinery not only requires high torsional strength, but also high wear resistance and creep resistance.

Some food machinery and equipment work at high temperatures (such as baking machinery) or low temperatures (such as refrigeration machinery, which can reach temperatures of around -40 ℃, and refrigeration machinery using liquid nitrogen as a medium will have lower working temperatures). Therefore, it is necessary to consider the performance of the materials used in the machinery and equipment at high and low temperatures.

The process conditions for food production are quite complex, so food machinery has high and extremely complex requirements for materials. Therefore, it is necessary to master the various properties of materials in order to make the correct choice in the selection of materials for food machinery equipment, in order to achieve the best use effect and the most economic benefits. Commonly used as food machinery for soy sauce oil tanks, cooking wine, salt tanks, equipment and dressings, as well as food processing equipment, salt extraction equipment, etc.

Commonly used special alloy materials in the food industry:

Stainless steel: 316LN, 317L, 317LMN, 254SMO, 904L, etc

Nickel based alloys: Incoloy800HT, Incoloy825, Nickel 201, N6, Nickel 200, etc

Corrosion resistant alloy: NS112