304 steel is a very common stainless steel, also called 18/8 stainless steel in the industry. Its corrosion resistance is better than 430 5 axis machining stainless steel, but the price is cheaper than 316 stainless steel, so it is widely used in daily life, such as some high-end stainless steel tableware, outdoor stainless steel railings, etc. Although 304 steel is very common in China, the name “304 steel” comes from the United States.
Many people think that 304 steel is a model name in Japan, but strictly speaking, the official name of 304 steel in Japan is “SUS304”.
304 steel is a versatile stainless steel that is widely used to make equipment and parts that require good overall performance (corrosion resistance and formability). In order to maintain the inherent corrosion resistance of stainless steel, the steel must contain more than 16% chromium and more than 8% nickel. 304 stainless steel is a brand of stainless steel produced in accordance with American ASTM standards.
304 is equivalent to my country’s 0Cr18Ni9 stainless steel. The chemical grade of 304 steel is 06Cr19Ni10 (old grade -0Cr18Ni9), which contains 19% chromium and 8-10% nickel. C Si Mn P S Cr Ni (nickel) MoSUS304 chemical composition ≤0.08 ≤1.00 ≤2.00 ≤0.05 ≤0.03 18.00-20.00 8.00~10.50 The density of stainless steel SUS304 is 7.93 g/cm3, which is a very important parameter for 304 steel and directly determines Its corrosion resistance also determines its value.
The most important elements in 304 steel are Ni and Cr, but they are not limited to these two elements. Specific requirements are specified by product standards. A common judgment in the industry is that as long as the Ni content is greater than 8% and the Cr content is greater than 18%, it can be considered 304 steel. This is why the industry calls this type of stainless steel 18/8 metal stamping stainless steel. In fact, the relevant product standards have very clear regulations on 304 steel, and these product standards have some differences for different shapes of stainless steel.
Link to this article：What is 304 steel? What are the characteristics of 304 steel?
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