304 stainless steel is a common material in stainless steel with a density of 7.93 g/cm3, also known as 18/8 stainless steel.

The common marking methods on the market are 06Cr19Ni10 and SUS304, of which 06Cr19Ni10 generally represents the national standard production, 304 generally represents the ASTM standard production and SUS 304 represents the Japanese standard production.

For 304 stainless steel, the Ni element in its composition is very important, which directly determines the corrosion resistance of 304 stainless steel and its value.

Although the most important elements in 304 are Ni, Cr, they are not limited to these two elements. The specific requirements are stipulated by the product standard. Common judgments in the industry consider that as long as the Ni content is greater than 8% and the Cr content is greater than 18%, it can be considered as 304 stainless steel. This is why the industry calls this type of stainless steel 18/8 stainless steel.

In fact, the relevant product standards have very clear regulations for 304, and these product standards have some differences for different shapes of stainless steel. Below are some common product standards and tests.

To determine if a material is 304 stainless steel, it must meet the requirements of each element in the product standard. As long as there is a non-conformity, it cannot be called 304 stainless steel.

In fact, there are more than these three standards mentioned in ASTM and JIS. Each standard actually has different requirements for 304, so to determine whether a material is  304 or not, the exact expression should be consistent with the 304 requirements in a product standard.

304 stainless steel is the most widely used chromium-nickel stainless steel with good corrosion resistance, heat resistance, low temperature strength and mechanical properties. Suitable for processing, storage and transportation of food. Has good processing properties and solderability. Suitable for household products (1, 2 types of tableware, cabinets, indoor pipelines, water heaters, boilers, bathtubs), auto parts (windshield wipers, mufflers, molded products), medical equipment, building materials, chemicals, food industry, agriculture, ship parts, etc. .