When purchasing stainless steel products, we should carefully check the outer packaging, whether to mark the material and steel number used, whether to indicate the manufacturer's name, site, telephone, container health standards and so on. If not, do not buy.
 
Under normal circumstances, the same thickness and shape of stainless steel tableware high-grade tableware will be heavier than low-grade material tableware weight, but the density difference is very small, 304 stainless steel is 7.93, 430 and 420 density is 7.85.
 
For the production of tableware stainless steel is mainly "Austenitic" stainless steel and "Martensitic" stainless steel two, bowls, plates and other generally use Austenitic "stainless steel production," Austenitic "stainless steel is not magnetic.
 
 
The tableware printed on the "13-0", "18-0", "18-8" three code is produced with stainless steel tableware, the number in front of the code indicates the chromium content, the number behind represents the nickel content, chromium is the product does not rust material, and nickel is corrosion resistant material. Regular manufacturers generally use 304 (that is, 18-8) and 430 (that is, 18-0) stainless steel as a spork, 420 (that is, 13-0) as a knife, 430 and 420 are magnetic, 304 is micro magnetic.