Stainless steel tableware for household use can be divided into three grades: 430, 304 (18-8), and 18-10.
430 stainless steel:
Iron +12% chromium, can prevent oxidation caused by natural factors, called stainless steel, in JIS code 430, so also known as 430 stainless steel. However, 430 stainless steel cannot resist oxidation caused by chemicals in the air, and 430 stainless steel will still oxidize (rust) due to unnatural factors after a period of infrequent use.
18-8 stainless steel:
Iron + 18% chromium + 8% nickel, can resist chemical oxidation, this stainless steel is 304 in the JIS code, so it is also called 304 stainless steel.
18-10 stainless steel:
However, there are more and more chemical components in the air, and even 304 will rust in some places with more serious pollution; So some high-end supplies will be made of 10% nickel to make it more durable and more resistant to corrosion, this stainless steel is called 18-10 stainless steel. In some tableware descriptions, there is a statement similar to "using 18-10 ********** medical stainless steel".
Stainless steel can be divided into three categories according to the metallographic structure: austenitic stainless steel, ferritic stainless steel and martensitic stainless steel. The main components of stainless steel are iron, chromium, nickel alloy, in addition to manganese, titanium, cobalt, molybdenum and cadmium and other trace elements, which makes stainless steel stable performance, rust and corrosion resistance. Austenitic stainless steel is not easy to be magnetized due to the particularity of the internal molecular structure.
