Why is 302 stainless steel rarely used in the stainless steel materials used in the water bottle industry?

The stainless steel materials commonly used in stainless steel water cup manufacturing plants are 201 stainless steel, 304 stainless steel, and 316 stainless steel. 410 stainless steel, 201 stainless steel and 304 stainless steel are used in the processing and manufacturing of the kettle.

201 stainless steel is usually used in the shell of double-layer water cups and kettles. 201 stainless steel also has the high density, alkali resistance and hardness of stainless steel.

However, because 201 stainless steel is not a food grade stainless steel, it cannot be in direct contact with the liquid that people drink, so it is used for the shell of water cups and kettles.

304 stainless steel is food grade stainless steel. Compared with 201 stainless steel, it has stronger acid and alkali corrosion resistance and is not easy to be oxidized. It is harmless to the human body when it comes in contact with the liquid that people drink.

316 stainless steel is a medical grade stainless steel, often appearing in surgical medical equipment. Compared with 304 stainless steel, 316 stainless steel has improved various performances and is safer.

410 stainless steel is usually used to make kettles and cutlery due to its strong toughness and ductility. 410 stainless steel is slightly inferior to 304 stainless steel in food performance, but it can still be used as food grade stainless steel.

So why is 302 stainless steel rarely used in the cup and pot industry?

This is due to the relatively high content of nickel and manganese in 302 stainless steel, which does not meet the requirements of food grade. At the same time, because the hardness of 302 stainless steel is too high, it is not suitable for processing such as quenching in the processing of water cups. 302 stainless steel will oxidize and rust when it is loaded with acid and alkaline liquids, so 302 stainless steel is not used in the cup and pot industry.

Dongguan Zhanyi Commodity Technology Co., Ltd. provides the development, production, processing and manufacturing of stainless steel water cups, kettles and stainless steel kitchen utensils for the world. Our company uses 304 stainless steel and 316 stainless steel in daily production. It can also be produced with 201 stainless steel and 410 stainless steel according to customer requirements. In production, we adopt a full inspection system for all links to ensure that 100% quality products leave the factory. Global buyers are welcome to visit our company's official website, learn about us and select products, we are willing to serve you wholeheartedly.