The material of dispensing pressure barrel is 304, 316 and 201. The commonly used stainless steel material is 304. If the requirement is not high, 201 material can also be used, the price is relatively cheap. Xiaobian takes you to know 201 stainless steel today.
Stainless steel 201 is food grade stainless steel?
1,201 stainless steel is a non-food grade stainless steel. It was developed to relieve the pressure of nickel during World War II. The stainless steel products contain 3.5-5.5% nickel, 5.5-7.5% manganese and 0.05-0.25% nitrogen formed by replacing some nickel with nitrogen and manganese to form austenitic phase to form austenitic stainless steel. According to the real standard, no manufacturer in China produces 201 according to the standard strictly (whether domestic or Japanese, American standard, etc.), but the performance of these products is similar to that of 201. I don't know if you notice that all domestic manufacturers producing similar materials are not manufactured according to the national or international standard of 201 pressure barrel. They are all enterprise standards and have different naming methods.
2. It is known that many domestic metal containers are also made of 201 (similar to 201) materials. Because of the high Mn content in 201 materials, elements that can damage health during food and heating are included. Usually, products exported to the United States and Europe must have food hygiene certification. At present, the authoritative certification of ROHS, LFGB reported that 201 stainless steel materials can not pass the test, so 201 pressure barrel can not meet food-grade safety requirements.
3. Because the mechanical properties of 201 material and 304 are similar, many manufacturers use 201 stainless steel material to produce products. 201 pressure barrel is also based on this need, including many edible tableware. Many businesses use 201 product as 304 for sale. In addition, the current domestic understanding of stainless steel exists. Certain misunderstandings, as long as magnetic stainless steel is not stainless steel, and 201 and 304 can be processed without magnetic, thus promoting the use of a large number of 201 stainless steel in China's food containers.
4. Stainless steel metal containers do not necessarily use austenitic stainless steel, especially stainless steel tableware. Many exports use ferritic stainless steel such as 430,443. These materials are completely food-certified and the quality is better than 201.