Chengdu stainless steel covers product standards Product standards for 304 stainless steel, its ingredients of ni elements are very important, directly determines the value of the corrosion resistance of stainless steel and 304. 304 is the most important element of Ni, Cr, but it is not limited to these two elements. Specific requirements set by the product standard. Industry conditions as long as the common determination Ni content is more than 8%, Cr content is more than 18%, it can be considered 304 stainless steel. This is why the industry will be called 18/8 stainless steel such reasons. In fact, the relevant product standard 304 has very clear rules, and these products have some differences in standards for different shapes of stainless steel. Here are some common product standards and testing. To determine a material is not a 304 stainless steel, the product must meet the standard requirements of each element, as long as one does not, it can not be called 304