443 Stainless Steel has many characteristics. Compared with 304 stainless steel, it is more advantageous to make food utensils. So is 443 as a kitchenware that is not safe? Let's explain in detail below:
First of all, 443 stainless steel increases the chromium content by 21%, making it comparable to the corrosion resistance as 304 stainless steel; in addition, because 443 stainless steel does not add nickel, the cost is relatively low; at the same time The thermal conductivity of stainless steel is also better than 304 stainless steel. As a pot product, it is more efficient than the 304 stainless steel pot. , Delay the aging of materials and improve the life of the pot kitchen utensils.
During the manufacturing process, stainless steel utensil products are usually replaced by material flowing, such as stretching straight utensils and micro -expanded micro -inflation utensils. 443 Stainless Steel has a good liquidity when stretching. It can be tested by the limit stretching ratio of 2.36, and the limit stretch ratio of 304 stainless steel is 2.21. The same utensils, because 443 is iron stainless steel, will not produce martensite transitions during the stretching process, so no tissue stress after stretching, and the probability of timing cracking is less than 304 (304 stretching and cracking. The main reason is caused by organizational transformation).
443 Stainless Steel's requirements for production molds
Because the yield strength of 443 stainless steel is high and the tensile strength is lower than that of 304 stainless steel, it is easy to crack at the R corner with a large cut stress. , Appropriately increase the R horns and pores. In the actual production process, the production of most of the lack of swelling utensils can be universal 304 molds.
How to estimate whether 443 stainless steel can successfully replace 304 in micro expansion and micro -inflation products
After the actual test, according to the shape and size of different products, when the expansion line of most products is deformation within 8-15%, the strength and extension of stainless steel materials are safe. Because the larger the product deformation, the greater the stress produced by the lattice distortion, the product with a large deformation should be chosen as little as possible.
Compared with 304 stainless steel, how to adjust the polishing process when applying 443 stainless steel
Because 443 is iron stainless steel, the sliding line is obvious after stretching and processing, so its surface is rough than 304 stainless steel after stretching, which makes it difficult to polish when polishing. Crude sand polish and increase the speed of polishing raids to solve it, but the polished 443 stainless steel surface is significantly better than 304.
443 Stainless Steel Products before finished packaging
In actual processing, it will occasionally find the rust of sand -light surface products. After detection and analysis, it is found that the cause of rust is actually not very clean after polishing. Fortunately, clean the product before the finished packaging.
